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HomeMy WebLinkAbout7a_WaterGroundwaterWetlands_12661.pdf i WATER/GROU pan DWATER/WETLANDS air-oRnnATsoN PR cm LLJ -K z :9 c CN U Q0 E u C:) < C3 z Iz— It/A 0 cc (3 N 0 co cm (d C.3 P z C9 r L ej 0 0cr ]AV[11 C)I HIUON C-11 511—vv I 4= C= cm co 4 Lo 00 It I-- C14 0 r- cm cm 0 ato C= 0 < M! cz U G _sIIW-1 31VHOdHODJ cr z CD 2 W Z) z w C.3 CJ C-) z cm —C=. C=D C=) C1VU F= z co co co C*4 CN CN C= O C= C=) C=) C=) 0 C=) 1- M W O O h o U U J oT= -1,-. y p d U Z F- Z N Y Z o co O J ~ a W -� z_z a s w Y N � r- F- z V LL) 1-N U b:3 K �. -i o T w lJJ U z a -�Z a w a c r u s w u u 3 J N U U QW U)ti rou t Ct o f" W Or z ul-� v/ c S O ? b Inm N Jyl cc K� u O W 0 o r o c ur Fb \ bw W S s 3 a z uV IU I V J J o �.aaoI W Q tj u N N J II 1"'11 G'11UD000IJU� ,�I •�_ I � 4 w e • = V 1- I wLU = • In lC wQ N r w z u a a: a .J b = w o o =a r I r— J N m Ir awr a z s • I' �• to 00 It s b I I _•__• I x . I o •' d a h _t -•VoI � v /• II O V o �4 I � 4 Q u Q� JL._ i'f v V uu 1 to p J FV I N T_j fib to V I a s= It �• ( zIt f v Q de o i i I I h a III Q ¢ o o o ♦''a I S b UW H z J o o a x = 1 J o J N M Z z u 4 b J l ! u du * Z o a �f y. ti 0 O a, LL U. U V b V In 1- V 0.x Y K u cr N Q d N Z a J \Ul O:Z w U. V V Ocr a o = z u d s O �. W j Ix V Y Y f 817113 Montana's Ground-Water Information Center(GWIC)I Geographic Data I V,11.2013 Groundwater Information Center You are currenllysigned in.181712013 Montana Bureau of Mines and Geology Sinn Out Montana Tech of The University of Montana 1300 West Park Street-Natural Resources Building Room 329 Butte Montana 59701-8997 Ph:(406)496-4336 Fx:(406)496-4343 I HoL► I�I�SPp 11 Aata Goon 1 Dr UgV eb 19URC I New Menus:I M@ 11.E I GWCP I ro ec s I go--qj I Geothermal I GWIC Data >Well Construction Data >Township:02S Range: 05E Sec:4 The following data were returned from the GWIC databases for the area you requested. For a more detailed description of the data view the GWIC Metadata report. If you notice data entry errors or have questions please let us know by clicking here to leave us a message. If you wish to view a one page report for a particular site, click the hypedinked Gwic Id for that well. Scroll to the right of your screen to view all the data.All data displayed on the screen may not show up when printed. Rotrioval 3tatlstfaw nid you I;no:v at10111... Field Max lo)mr GV1IC data Total Depth(ft) 150.00 10.00 61,04 Static Water Level(ft) 28.00 -9.24 7.74 Thanks,Just take me back to the monu. Yield(gpm) 100.00 20.00 47.91 i ,r 1`43.4G data 'i hoso otntlstler,do nat lake any gstogmphic,topographic,or MBMG has 3B5 publications available for GALLATIN county. naologle factors into consider,tion.Noryttive 5wl values C re MBMG has 3 abandoned mine record(s)for this request area. r.poricd for water lovols that are ati:wn land nwrfae e. vir.Irl 11UF W117C Wo Situ Name ftvn Rnn Sic U$r.; Vet? -ryw! I'd SYPI Pv�l Rtvl 'ri i 95621 HUCKERT 02S 05E 4 No WELL 38.00 8.00 12,00 20.00 BAILER 7/28/1961 DOMESTIC HAROLD 206730 HATTEN DEAN 02S 05E 4 AA No WELL 60.00 5.00 5.00 40.00 AIR 915/2003 IRRIGATION AND PENNY 16794 CJ C-30024193 HINESLEY 02S 05E 4 BDDC No WELL 75.00 5.00 5.00 42.00 AIR 619/2006 DOMESTIC DEVELOPMENT 220624 HINESLEY 02S 05E 4 C No WELL 62.00 10.00 10.00 66.00 AIR 7/25/2005 IRRIGATION DEVELOPMENT 220478 ROSA 02S 05E 4 C No WELL 60.00 &00 8.00 60.00 AIR 6/28/2005 IRRIGATION ENTERPRISE 220,177 ROSA 02S 05E 4 C No WELL 60.00 6.00 6.00 30.00 AIR 6127/2005 IRRIGATION ENTERPRISE 236751 Q HINESLEY 02S 05E 4 CA IJo WELL 80.00 7.00 7.00 85.00 AIR 612812007 DOMESTIC DEVELOPMENT 224482 '!Z� C30022805 REDTAIL 02S 05E 4 CA No WIELL 40.00 4.00 4.00 30.00 AIR 3131/2006 IRRIGATION MEADOWS CONDOMINIUMS, 269041 CITY OF 02S 05E 4 CAAA No WELL 38.00 4.00 4.00 60.00 AIR 10125/2012 IRRIGATION BOZEMAN 269041 CITY OF 02S 05E 4 CAAA No WELL 38.00 4.00 4.00 60.00 AIR 1012512012 IRRIGATION BOZEMAN 226793 G30027634 HINESLEY 02S 05E 4 CACC No WELL 60.00 6.00 5.00 62.00 AIR 617/2006 DOMESTIC DEVELOPMENT 226795 C-30027635 HINESLEY 02S 05E 4 CCDA No WELL 60.00 5.00 5.00 72.00 AIR 61812006 DOMESTIC DEVELOPMENT -175100 f♦ NOLLMEYER 02S 05E 4 CCDD No WELL RIC-I ARD 217146 la GOLDEN HILLS 02S 05E 4 CD Nu WELL 60.00 5.00 5.00 25.00 AIR 3114/2005 IRRIGATION CONDOMINIUM ASSOCIATION,. 95622 "1 YPMA FRED 02S 05E 4 CD No WELL 10.00 10.00 20.00 OTHER 411/1898 DOMOTIC 9562$ "°1 DUSENBERRY 02S 05E 4 D No WELL 62.00 27.00 30.00 21.00 BAILER 3/21/1964 DOMESTIC BERT L JR 252967 30050641 EXPONENTIAL 02S 05E 4 DBB No WELL 78.00 10.00 10.00 35.00 AIR 9/22/2008 IRRIGATION DESIGN,LLC. mbrrlggwic.mlech,edu/so IserveNvl l/dala/dataGeoo renhic.asp?nap ename=&rel)ort=wl0&Township=02S&Rana a=05E&section=4&SorlOrder=trs&reol-Ink--ON... 112 817/13 Montana's Ground-Water Information Center(GWIC)I Geographic Data I V.11.2013 9562 DYKSTRA 02S 05E 4 DC No WELL 70,00 •9.24 15.00 60.00 PUMP 311011973 DOMESTIC SIDNEY&ETHEL M 226380 JOHN ROSA 02S 05E 4 DCC No WELL 40.00 6.00 6.00 60.00 AIR 4/2712006 IRRIGATION CONST ROLFE&WOOD 02S 05E 4 DD No WELL 33.00 9.00 30.00 OTHER 1/1/1869 DOMESTIC INC 226378 -"' C-30027976 DMC InIC 02S 05E 4 DDB No WELL 150.00 28.00 28.00 100.00 AIR 4/2612006 IRRIGATION ki 95626 3844 METCALF BOB 02S 05E 4 DDC No WELL 58.00 3.30 33.00 20.00 PUMP 5/2411 9 7 4 DOMESTIC loon g 99366 METCALF 02S 05E 4 DDD No WELL 72.00 8.00 22.00 60.00 AIR 6/1411996 DOMESTIC PEGGY 46323 C30D44478 ROSA 02S 05E 4 DDD No WELL 100.00 10.0D 10.00 45.00 AIR 7/2812008 IRRIGATION JOHNSON CONSTRUCTION LLC End of Report. 24 record(s)listed. Items of(Vote: 'This report is restricted to site types of WELL,BOREHOLE,SPRING,COAL BED METHANE WELL,PETWELL,PIEZOMETER- 2Asingle well record(a distinct GWIC Id)maybe represented by more than one line In this report if more than one performance test was conducted on the well at the time ofdrilling. Explanation of Columns: GWIC Id=Key field for the GWIC database.Links to one page reports. PDF=Are scanned documents available through the Document Manager? r„ ■ =Yes,click on the icon to download the PDF file. ■ =No,well was submitted electronically.No paper record e)dsls. ■ G�=No,record does have a known well log but it is not scanned yet. ■ �?=No,record mayor may not have a document to scan.Metadata is unclear. ■ t:!=No,record was created from a source other than a well log.No paper record exists. UNRC WR=Water right number assigned to this site byDeparlmentof Natural Resources and Conservation. Site Name=Current owner name assigned to GWIC record. Location=Location of site in Montana township,range,section,and quarler-section coordinates. Ver?=Has this location been verified by field staff? Type=Type of site assigned to GWIC record. Td=Total depth of well In feet below ground. Swl=Static water level in feet abovelbelow ground-Negative values are reported for water levels that are above land surface. Pwl=Pumping water level in feel below ground. Rwl=Recovery water level In feet below ground. Yield=Yield in gallons per minute. Test=Type of performance test reported. Date=Completion date ofwell/borehole. Use=Reported use of water. Disclaimer: The preceding materials represent the contents ofthe GWIC databases at the Montana Bureau of Mines and Geology at the time and date ofthe retrieval.The Information is considered unpublished and is subject to correction and review on a dailybasis.The Bureau warrants the accurate transmission ofthe data to the original end user at the lime and date ofthe retrieval.Retransmission ofthe data to other users Is discouraged and the Bureau claims no responsibility If the material is retransmitted.There may be wells in the requestarea that are not recorded atthe Information Center. Ground Water Information Center Online©1998-2013 Staff I Privacy Statement mbningWc.miech.edulsolserver/v11/dataldataGeo4raphic.asp?paoename=&report=wlO&Township=02S&Range=05E&section=4&SortOrder=trs&repLink ON.. 2/2 Revised:2/IG/l2 QJ formM AGENCY USE ONLY: Application# Date Received Form may be downloaded From: Date Accepted /Initials Date l,orwarded to DFWP wwwAnre.mt,gov/permit default l6' Thls space is for nil Department of Transportation and SPA 124 permits(govermmnent projects). 'roject Name Control Number _ _ Contract letting date MEPA/NEl'A Compliance ❑Yes D No If yes,#14 of this application does not apply. JOINT APPLICATION FOR PROPOSED WORK IN MONTANA'S STREAMS,WETLANDS,FLOODPLAINS, AND OTHER WATER BODIES Use this form to apply for one or all local,state,or federal permits listed below. The applicant is the responsible party for the project and the point of contact unless otherwise designated. "Information for Applicant" includes agency contacts and instructions for completing this application. To avoid delays,submit all required information,including a project site map and drawings. Incomplete applications will result in the delay of the application process. Other laws may apply. The applicant is responsible for obtaining all necessary permits and landowner permission before beginni pa work. PERMIT AGENCY FEE X 3 10 Perin it Gallatin Conservation District No fee SPA 124 Permit Department of Fish, Wildlife and Parks No fee Floodplain Permit Gallatin Floodplain Administrator Varies by city/county ($25-$500+) Section 404 Permit,Section 10 Permit U. S.Army Corps of Engineers Varies($0-$100) 318 Authorization Department of Environmental Quality $250(318); 401 Certification $400-$20,000 401 Navigable Rivers Land Use License or Easement Department of Natural Resources and License$25;basement$50, Conservation,'ITtist Lands Management Division plus annual fix; A. APPLICANT INFORMATION NAME OF APPLICANT(person responsible for project): Four Corner Construction, LLC, contact: John Rosa_ Has the landowner consented to this project? X Yes ❑No Mailing Address: _125 Central Avenue, Bozeman, MT 59718 Physical Address: (same) Day Phone: _406 580-5646 Evening Phone: _(same)_E-Mail:john@rosa-johnson.com NAME OF LANDOWNER(if different from applicant): (same as above) Mailing Address: Physical Address: Day Phone: Evening Phone: E-Mail: NAME OF CONTRACTOR/AGENT(if one is used):_Vauglin Environmental Services (Barbara Vaughn) Mailing Address:_8353 Saddle Mountain Road,Bozeman, MT 59715 Physical Address: (same) Day Phone: _406-586-6909_Evening Phone: cell: 406 581-0655 E-Mail: bvaughn@montana.com B. PROJECT SITE INFORMATION NAME OF STREAM or WATER BODY at project location: Baxter Creek (Impact#1 -Westbrook Subdivision Wetlands Impact Summary; Impacts 2-4; Boulder Creek Subdivision Wetlands Impact Summary) and UT of Baxter Creek(Impact#4; Boulder Creek Wetlands Impact Summary). Nearest Town Bozeman, MT Address/Location:_NE of Durston Road and Laurel Parkway_Geocode (if available): South 1/2, Section_4 , Township_2 S , Range_5E County_Gallatin .ongitude_111'06'41.32" , Latitude_45'41"20.54"N The state owns the beds of certain state navigable waterways. Is this a state navigable waterway? Yes or No. If yes, send copy of this application to appropriate DNRC land office—see information for Applicant. ATTACH A PROJECT SITE MAP OR A SKETCH that includes: 1) the water body where the project will take place, roads, tributaries, landmarks; 2)a circled "X" representing the exact project location. IF NOT CLEARLY CTATED ON THE MAP OR SKETCI-[,PROVIDE WRITTEN DIRECTIONS TO THE SITE. C.PROJECT INFORMATION 1. TYPE OF PROJECT(check all that apply) X Bridge/Culvert/Ford Construction ❑ Fish Habitat ❑ Mining ❑ Bridge/Culvert/Ford Removal ❑ Recreation(docks, marinas,etc.) ❑ Dredging X Road Construction/Maintenance ❑ New Residential Structure ❑ Core Drill ❑ Bank Stabilization/Alteration ❑ Manufactured Home X Placement of Fill ❑ Flood Protection ❑ Improvement to Existing Structure ❑ Diversion Dam ❑ Channel Alteration ❑ Commercial Structure ❑ Utilities ❑ Irrigation Structure ❑ Wetland Alteration ❑ Pond ❑ Water Well/Cistern ❑ Temporary Construction Access ❑ Debris Removal ❑ Excavation/Pit ❑ Other 2. PLAN OR DRAWING of the proposed project MUST be attached. This plan or drawing must include: • a plan view(looking at the project from above) -a cross section or profile view • dimensions of the project(height,width,depth in feet) - an elevation view • location of storage or stockpile materials • dimensions and location of fill or excavation sites •drainage facilities • location of existing or proposed structures, such as • an arrow indicating north buildings,utilities, roads,or bridges 3. IS THIS APPLICATION FOR an annual maintenance permit? ❑ Yes X No (If yes, an annual plan of operation must be attached to this application—see"Information for Applicant") PROPOSED CONSTRUCTION DATE. Include a project timeline. Start date _7_/_I_/_14_ Finish date_I 1_/_30_/_14_Is any portion of the work already completed? El Yes ❑ No (If yes, describe the completed work.) Temporary culverts were installed under Permit GD-02-03 at Sherwood Way (Impact#2 Exhibit) authorized for Chuck I Iinesley of Laurel Glen Subdivision and under Permit GD-052-05 at Oak Street(Impact#4 Exhibit) for John Rosa of Rosa Subdivision. 5. WHAT IS THE PURPOSE of the proposed project? Construction of Phases 1 and 2 of Laurel Glen Subdivision was started in 2002. Phases 3 and 4 of the subdivision encompassing Baxter Creek and an unnamed tributary of Baxter Creek (aka Baxter Ditch) were never developed. IIinesley Development submitted a preliminary plat application to the City of Bozeman for the final development phases in December 2008. The project was sold to Four Corners Construction, LLC in 2013. Permit GD-81-02 was approved on January 17, 2003, for three 54-inch by 88-inch reinforced concrete pipe (RCP) culverts to be installed across Baxter Creek as part of the subdivision road development. The permanent culverts were never installed. This 310 permit application is for the installation of four arched concrete culverts, three on Baxter Creek and one on the UT of Baxter Creek to provide road access for Westbrook and Boulder Creek Subdivisions both owned by Four Corners Construction. The culvert impacts and specs are shown on the enclosed Wetland Impact Summary sheets for Westbrook and Boulder Creek Subdivisions and on the Exhibits for Impacts #1 to 44. Impact 45 is associated with filling in the gravel pit lake,which is not within the Conservation District's purview. The US Army Corps has been contacted. PROVIDE A BRIEF DESCRIPTION of the proposed project. Chree arched reinforced concrete (RCP) culverts measuring 54 inches by 88 inches will be installed in Baxter Creek for the Annie Street, Sherwood Way, and West Oak Street crossings. The culvert lengths are listed on Exhibits for Impacts #1, #2, and #3. A 36 inch by 58 inch RCP culvert will be placed in the UT of BC for the West Oak Street crossing. Exhibit #4 provides the details. The impact locations are summarized on the Wetlands Impact Summary sheets for Westbrook and Boulder Creek Subdivisions. There are existing temporary culverts at the Sherwood Way/Baxter Creek and West Oak/UT of BC crossings that will have to be removed to install the permanent concrete culverts. WI3AT 1S THE CURRENT CONDITION of the proposed project site`? Describe the existing bank condition, .nk slope, height, nearby structures, and wetlands. The banks have been impacted at the temporary crossings on Sherwood Way and West Oak Street. Baxter Creek has a dirt road crossing without a culvert at West Oak Street. Construction fence was placed at the crossing to prevent vehicles from driving through the stream. The banks at Annie Sheet are relatively unimpacted and well-vegetated with beaked sedge, Nebraska sedge, and meadow foxtail. The banks range in height from 1 to 2 feet. Baxter Creek has 50-foot watercourse setbacks from the stream. 8. PROJECT DIMENSIONS. How many linear feet of bank will be impacted? How far will the proposed project encroach into and extend away from the water body? See Impact Exhibits#1 to 44: Impact #1 —Annie Street: 141 feet of Baxter Creek Impact#2 Sherwood Way: 90 feet of Baxter Creek Impact#3 West Oak Street: 84 feet of Baxter Creek Impact#4 West Oak Street: 84 feet of the UT of Baxter Creek(Baxter Ditch) 9. VEGETATION. Describe the vegetation present on site. How much vegetation will be disturbed or covered with fill material during project installation? (Agencies require that only vegetation necessary to do the work be removed.) Describe the revegetation plan for all disturbed areas of the project site in detail. —he upland benches are dominated by meadow foxtail (Alopecurus pratensis). Secondary upland species ..,elude smooth brome(Bromus inermis), Kentucky bluegrass (Poa pratensis), musk thistle(Carduus nutans), common dandelion(Taraxacum officinale), and wild mustard (Brassica kaber). The wetland vegetation is dominated by meadow foxtail, beaked sedge (Car( utriculata—OBL), and Nebraska sedge (Carex nebrascensis—OBL). Isolated clusters of Bebb willow(Salix bebbiana—FACW) and thin-leafalder(Alnus tenuifolia—FACW) line the streambanks of Baxter Creek near the Annie Street crossing. Areas disturbed by the culvert installations will be reseeded with a streambank mix composed of streambank wheatgrass, slender wheatgrass, tufted hairgrass, and fowl bluegrass. 10. MATERIALS. Describe the materials to be used and how much. Cubic yards/Linear feet Size and Type Source See Impact Exhibits #1 to 4. 11. EQUIPMENT. What equipment is proposed to be used for the work? Where and how will the equipment be used on the stream bank and/or the waterbody? The equipment will work outside the top of the streambank. A trackhoe, grader, dump truck, and front-end loader will be used for the culvert installations. 12. DESCRIBE PLANNED EFFORTS TO MINIMIZE PROJECT IMPACTS. Consider the impacts of the )posed project, even if temporary. What efforts will be taken to: • Minimize erosion, sedimentation,or turbidity? The culverts will be installed during low flows in late summer. Silt fence will be placed parallel to the stream to prevent sediment from entering the stream. The streambanks will be revegetated with seed as soon as possible after construction. The streamflow will be contained behind a coffer dam and piped to the downgradient reach during construction. • Minimize stream channel alterations? The Bozeman street grid dictated the ROW for the roads. Alterations to the stream channel were minimized to the extent possible. The culvert inlets and outlets will be flared ends. Rock will be used at the edge of the flared ends to prevent erosion. • Minimize effects to stream flow or water quality caused by materials used or removal of ground cover? The culverts were designed for the 100-year flow event. Impacts to water quality will be short-term and occur only during the culvert preparation and installation. Disturbed areas will be revegetated as soon as possible following construction. Silt fence will be used to prevent sediment from discharging to the stream. Construction will take place during low flows. • Minimize effects on fish and aquatic habitat? The streamflow will be contained behind a coffer dam and piped to the downgradient reach during construction to minimize impacts to fish. Construction will take place in late summer during low flows. • Minimize risks of flooding or erosion problems upstream and downstream? The culverts were designed for the 100-year flow event. There is no increased risk of flooding as a result of the culvert installations. Silt fence will be used to prevent the introduction of sediment to the stream. Disturbed areas will be revegetated with seed as soon as possible following construction. • Minimize vegetation disturbance, protect existing vegetation, and control weeds? The extent of the construction area will be minimized to the extent possible. The removal of large trees or sluvbs will be avoided if possible. Disturbed areas will be reseeded as soon as possible to minimize the introduction of weeds. 13. WHAT ARE THE NATURAL RESOURCE BENEFITS of the proposed project? The installation of culverts will prevent vehicles from crossing through the streams. The length of the culverts, except for the Annie Street crossing, will still allow fish access upstream. The culverts will facilitate the street grid system proposed in the Bozeman City master plan. The stream crossing at Glenwood Street was removed to reduce impacts to Baxter Creek. 14. LIST ALTERNATIVES to the proposed project. Why was the proposed alternative selected? The installation of four bridges would be prohibitively expensive particularly on small streams like Baxter Creek and the UT of Baxter Creek. The culverts and roads will prevent vehicles from driving through the creeks and destroying the stream banks. One culvert crossing on Baxter Creek proposed originally at Glenwood Street(now Ethan Way)was removed in the current plat layout for Westbrook Subdivision. D. ADDITIONAL INFORMATION FOR SECTION 404,SECTION 10,AND FLOODPLAIN PERMITS ONLY. If applying for a Section 404 or Section 10 permit,fill out questions 1-3. If applying for a floodplain permit,fill out --lestions 3-6. (Additional infonnation is required for floodplain permits—See"Information for Applicant.") I. Will the project involve placement of fill material below the ordinary high water mark, a wetland, or other waters of the US? If yes, what is the surface area to be filled? How many cubic yards of fill material will be used? Note: A delineation of the wetland may be required. The fill requirements are listed on the Impact Exhibits. A permit amendment request has been submitted to the Helena Regulatory Office for the USACE. The wetland delineation and permit,Department of the Army Corps File No. 2001-90-847 Amendment#4, completed in 2008 is still valid. Description of avoidance, mitigation, and compensation(see Information for Applicant). Attach additional sheets if necessary. Not applicable 3. List the names and address of landowners adjacent to the project site. This includes properties adjacent to and across from the project site. (Some floodplain communities require certified adjoining landowner lists). _Please see enclosed Adjoiner's List 4. List all applicable local, state, and federal permits and indicate whether they were issued, waived,denied, or pending. Note: All required local, state, and federal permits, or proof of waiver must be issued prior to the issuance of a floodplain permit. Department of the Army Corps File No. 2001-90-847 5. Floodplain Map Number 6. Does this project comply with local planning or zoning regulations? X Yes CI No C.SIGNATURES/AUTHORIZATIONS-- Each agency must have original signatures signed in blue ink. After completing the form, make the required number of copies and then sign each copy. Send the copies tvith original signatures and additional information required directly to each applicable agency. i he statements contained in this application are true and correct. The applicant possess' the authority to undertake the work described herein or is acting as the duly authorized agent of the landowner. The applicant understands that the granting of a permit does not include landowner permission to access land or construct a project. Inspections of the project site after notice by inspection authorities are hereby authorized. APPLICANT(Person responsible for project): LANDOWNER: Print Name: Print Name: Signature of Applicant Date Signature of Landowner Date *CONTRACTOR/AGENT: Print Name: Signature of Contractor/Agent Date *Contact agency to determine if contractor signature is required. Gallatin Lw. 1949 Co nservallon District Conservation ~ ` Oevelnpmenl ScIfGoverntaen! 1/2/2014 ***NOTICE OF APPROVAL FOR 310 PERMIT*** Four Corner Construction,LLC 125 Central Ave Bozeman,MT 59718 RE: 310 Application GD-038-13 PERENNIAL STREAM: Baxter Creek and UT of Baxter Creek Dear Mr.Rosa: In the above-mentioned 310 Application you applied to do the following: Culvert Construction/Road Constniction- Maintenance/Placement of Fill The purpose for your 310 Application was:The installation of lour arched concrete culverts,3 on Baxter Creek and I on UT of Baktor Creek to provide axid access for Wes1rook and Boulder Creek Subdivisions both owned by Four Comers Consti`itction. Impact d11,5.4"x 88"x 14'1'at Anriie;Street. Impact 112,54"x 88"x 90'at Sherwood Way, Impact 93,54"x 88"x 84'at Oak Street.l'mpact lilt,36"x 58 I P,"x 84'at Oak Street(UT Baxter Creek). A Gallatin Conservation District representative and a representative from Montana Fish Wildlife R Parks inspected the project site on 10/8/2013. The Gallatin Conservation District Board of Supervisors reviewed the above-mentioned 310 Application at their monthly board meeting on 12/19/2013. Your project was Approved with Modifications: Culverts to be set 6" below bed of stream and at existing channel slope. Fish tvstilig culvert to be ins 9110 at Site I according to plans submitted 10-15-2013.Location of culvert at Site I approved according to drawing recei'ved 12-13-2013. Waiver of 15-day waiting period granted?False Please note that your permit will expire on 10/17/2014. This permit is only for the work specified above. if the scope of the work changes a new permit trust be applied for. It is required to have a copy of this permit on site. A 310 permit does not give an individual permission to do a project-only to do the project in a specific manner onceall other permits are obtained. All individuals undertaking activities specified in a 310 permit are encow•aged to obtain accurate cost estimates for projects before starting any work. 1 have enclosed two copies of Form 273(310 Permit)-one copy is for your records and the second copy to be returned-please mark the appropriate box,then sign,date,and return the form to this office within 15 days. At the completion of your project please till out the bottom portion of the permit and return it to this office within 15 days of the completion of your project. If we have not received the signed permit within the 15-day time period you will be found in violation of the 310 lawand your 310 pennit will no longer be valid. If you have any questions or comments please feel free to contact me at 282-4350 Ext 1. Sincerely, p ��(�l1-�f�1•_A r• Maroc Mui•uion District Administrator Gallatin Conservation District Enclosures Cc Vnughn Environmental Po Sox 569 Munhattan,MT 59741 406-282-4350 www.gallutincd.org 310 P L R M 11 Decision Date ApQlicalioq Number STREAMBED AND LAND PRESERVATION ACE(310 Law)Supervl.sors'Dedsion 1211912013 GD•038-13 Note: Landowner permission,easements or other federal,state,or local permits,licenses,special use permits,or authorizations may be required before construction Ne project. It is the duly of the holder of this permit to determine which are necessary and obtain them prior to construction of the project. tt�of pliant Business NaIYlo rest_ I .rohn Rosa Four Corner Construction LLC F125 Central Ave tare _ Name.of'Rere Baxter Creek and UT of Baxter Creek Bozeman MT 59718 Section' t2 .Wahl" . n " ' ' Suryl:b snecisio 4 2S 5E Approved with Modifications b;;ntl' ilAc(lY - - - Culvert Construction Road ConstructionlMamtenance Placement of FUi The installation of four arched concrete culverts,3 on Baxter Creek and 1 on UT of Baxter Creek to provide road access for Wesbrook and Boulder Creek Subdivisions both owned by Four Corners Construction.Impact 01,54"x 88"x 141'at Annie Street.Impact 92,54"x 88"x 90'at Sherwood Way.Im act#3,54"x 88"x 84'at Oak Street.Im act#4 36"x 58112"x 84'at Oak Street Baxter Creek). Culverts to be set 6" below bed of stream and at existing channel slope. Fish resting culvert to be installed at Site 1 according to plans submitted 10.15-13.Location of culvert at Sile 1 approved according to drawing received 12-13.13 Work may not commence on a project for False Waiver of 15- False Recurrent Permll Expiration Date Permit Transmittal Date 15 days after receipt of this decisiai day Waiting Permit unless district has checked the waiver Period box. 1011711014 1011811013 SUPERVISORS'SIGNATURES: i ,t c --------------------------------------(cut here)........................................................... - Applicant must sign and return this portion of the permit within 15 days of completion of all the above approved work. ❑ 1 he work approved by Ihis permit GD-038.13 has,been completed in accordance to the permit. Signature of Applicant: " "" Dale: *c -------------- --(cut here)-........................................................... The applicant must agree to abide by the conditions of this permit by checking the appropriate box,signing below,and returning this form to the district office within 15 days. GD•038.13 ❑ I hereby agree to proceed with the project in accordance with the approved application and will allow follow-up inspection. ❑ I understand the project as proposed hass4a n,dehi9d,and I,piay.``rr ubp011 my application w h. odlibations. ❑ I hereby agree to proceed with the project�'n n 4 hi fi f�cations` nt i�'ed h�Fel and will allow follow-up Inspection. If the applicant disagrees with the supervisors'decision and wishes,to formally resolve the dispute, the applicant must check the box below, sign, and return this form to the district within 5 working days. . •. 'l "y `� ❑ I disagree with the supervisors'decision and hereby request alb' l atlon. oignature of Applicant: Date: V.lt-Li Gr I-�1[ N Environmental Services 400.586-8909•Cell-400.581.0655 •bvauglrn�monluna.cum 8353 Saddle Mountain Road •Bozeman,Montana 59115 Attn: Todd Tillenger US Army Corps of Engineers IIelena Regulatory Office 10 West 15`h Sheet,Suite 2200 IIelena, Montana 59626 RE: Request for Amendment 5 for Permit Corps File No.2001-90-847 August 29,2013 Dear Todd: Amendment Number 4 for Permit No. 2001-90-847 for Laurel Glen Subdivision was authorized by your office on June 8, 2009. The expiration date for the permit amendment is June 8, 2014. The undeveloped land within the subdivision was sold by Charles Hinesley in 2013 to Four Corners Construction, LLC, represented by John Rosa. A signed Transfer of Ownership form was sent to John Short with the US Army Corps Helena office on June 3, 2013. The land will be divided into two new subdivisions called Westbrook and Boulder Creek Subdivisions as shown on the respective Wetlands Impact Summary exhibits enclosed with this submittal. The original delineation for the Laurel Glen Subdivision located in Bozeman, Montana, was completed in November 2001. US Army Corps of Engineers (USAGE)Permit 2001-90-847 was approved on October 15, 2002, and expired on October 15, 2007. Phases 1 through 4 (Phases 3 and 4 were never developed) of the subdivision encompassed 157 acres located in the East %2 of the SW '/a and the West '/2 of the Southeast '/4 of Section 4, Township 2 South and Range 5 East,Gallatin County. This letter is a request to authorize Amendment 5 associated with this permit to address changes in the subdivision ownership and plat layout. The 2013 wetland impact areas for the culvert installations are summarized in Table 1.0. The culvert sizes and road specifications and fill volumes have not changed from 2009 to 2013. Table 1.0. Culvert installation impact surnmary for 2013 plat layout. STREET IMPACT AREA CHANGE FROM NUMBER CROSSING DRAINAGE 2008 TO 2013 ON 2013 SF(ACRES) EXHIBITS Annie Street Baxter Creek 8457(0.1941) Same 1 Sherwood Street Baxter Creek 3753 (0.0862) Same 2 Oak Street Baxter Creek 7110(0.1632) Same 3 Oak Street Baxter Ditch 728 (0.0167) Reduce S from 933 a Crossing Glenwood Drive Baxter Creek 8043 (0.1846) Eliminated on 2013 layout TOTAL 20,048 (0.46)* *2013 revised plat layout eliminated crossing at Glenwood Drive. The 2013 plat layout has eliminated the crossing on Baxter Creek at Glenwood Drive. The extent of proposed impacts to jurisdictional waters of the US totals 0.46 acres for culvert installations associated with road development in Westbrook and Boulder Creek Subdivisions. Wetland impact#5 listed and shown on the Boulder Creek Subdivision Wetlands Impact Summary is associated with filling in a portion of a gravel pit lake that has developed since project construction began in 2002. The gravel pit was originally going to be backfilled. The new owners would like to develop the pond as an amenity. The gravel pit lake was assumed to be jurisdictional based on the proximity to Baxter Creek (within 10 feet in some areas), the presence of a rocky soil substrate, and the establishment of wetland vegetation around the perimeter of the lake. The gravel pit pond encompasses 49,057 square feet (1.13 acres) of open water with a three-foot wide wetland fringe (3851 sf, 0.09 acres) on the pond perimeter. Approximately 12,428 sf(0.29 acres) of the pond will be filled for lot development. The remaining pond will provide 0.84 additional acres of a lacustrine system and 0.09 acres of lacustrine fringe. The total impacts to project wetlands from the culvert installations and pond fill are 0.75 acres(0.46 plus 0.29 acres). Amendment 4 references a total of 2.89 acres for full buildout of the project, 2.11 acres from impacts that occurred before 2008 and 0.78 acres from the culvert installation impacts addressed in Amendment 4. The impact acreage requested for Amendment 5, 0.75 acres, is slightly less than the 0.78 acres referenced in Amendment 4. Infrastructure construction is anticipated in fall 2013 and 2014 dependent oil preliminary plat approval,USACE permit approval, and the economy. if you require further information or have questions, please call my office at(406)586-6909 or contact me at bvaughn@montana.com. Sincerely, Barbara Vaughn Environmental Engineer, MS Cc: John Rosa Enclosures: Wetlands Impact Summary—Boulder Creek Subdivision Wetlands Impact Summary—Westbrook Subdivision DEPARTMENT OF THE ARMY CORPS OF ENGINEERS,OMAHA DISTRICT HELENA REGULATORY OFFICE 10 WEST le"STREET,SUITE 2200 REPLY TO HELENA MT 59626 ATTENTION OF December 24, 2013 Regulatory Branch Montana State Program Corps No. NWO-2001-90847-MTH Subject: Laurel Glen Subdivision Vaughn Environmental Services Attn: Ms. Barbara Vaughn 8353 Saddle Mountain Road Bozeman, Montana 59715 Dear Ms. Vaughn: Reference is made to your request to modify Department of the Army Permit NWO-2001-90847-MTH issued on October 10, 2002, for wetland impacts associated with construction of the above subdivision development project, located in Section 4, Township 2 South, Range 5 East, in Gallatin County, Montana. Specifically you requested the following modifications: The modified activity involves the following changes: 1. The name of the subdivision is changed from Laurel Glen to Boulder Creek and Westbrook Subdivisions. 2. The permit and land ownership is transferred to Four Corners Construction, LLC, represented by John Rosa. 3. The Oak Street crossing on Baxter Ditch is reduced to 728 square feet (0.0167 acres) from 933 square feet of wetland impacts associated with the culvert crossing. 4. The Glenwood Drive crossing on Baxter Creek is eliminated reducing the overall impacts by 8043 square feet(0.1846 A). 5. A gravel pit lake that has developed since project construction began will be partially filled for lot development. The gravel pit pond encompasses 49,057 square feet (1.13 acres) of open water with a three-foot wide wetland fringe (3851 square feet, 0.09 acres) on the pond perimeter. Approximately 12,428 square feet (0.29 acres) of the pond will be filled for lot development. The remaining pond will provide 0.84 additional acres of a deep water(greater than 2m) lacustrine system and 0.09 acres of lacustrine fringe. 6. Amendment 4 included a total of 2.89 acres for full build out of the project, 2.11 acres from impacts that occurred before 2008 and 0.78 acres from the culvert installation impacts addressed in Amendment 4. The impact acreage requested.for Amendment 5, 0.75 acres, is 0.03 acres less than the 0.78 acres proposed in Amendment 4. 7. The expiration date of the permit is extended to June 8, 2019. Printed on®Recycled Paper -2- DA Authorization NWO-2001-90847-MTH is hereby modified. All terms and conditions of the original permit remain in effect. Please contact Deborah Blank at (406) 441-1375 if you need additional information regarding this amendment. BY THE AUTHORITY OF THE SECRETARY OF THE ARMY: Joel R. Cross Colonel, Corps of Engineers District Commander By: Todd N. Tillinger Montana Program Manager WETLAND IMPACT SUMMARY WES TBROOK SUBDIVISION LOCATED IN THE S 112 OF SECTION 4, T. 2 S., R. 5 E. OF P.M.M., CITY OF BOZEMAN, GALLATIN COUNTY, MONTANA LEGEND EXISTING WETLAND BOUNDARY l I I ` ii P Ro P O iy y� 7 �1 �p y 7j LOT 1 I I ` B l 1i E1� I PUBLIC PARK/OPEN 1 L. z LOT 8 LO7 o NSPACE 1 1 n 7 7 Ie a,x1 sn n. ms sa n \ / EXISTING MITIGATED WETLANDS �—+ LOT 1 WEIIAND a/P1Cr 11 �y �' J - i neu^e.467 SD rr LOT 12 LOT I0 LOT 9 LOT 9� PARK 5 I I e.sl� .n. 4 ca,t•n n. a.alr ra.ry /7 cc.>sa.n. I—\, PROPOSED WETLAND DISTURBANCE _ PROPOSED DETENTION POND S PROPOSED RCP CULVERT ""= - - ^__��;. / o � f�'/ 1 LOT 99 `�•,\\ 1 ]�e uu w v ar x i`� �j/j'• �: �'/ 8� I LOT 0 Vt LO `JA LOT 10 -{ �,,` C] I °ugFv✓\` — ��� LOT PB LOT B I LOT i LOT 8A LOT 7 I LOT 78 LOT 12 = PUBLIC PARKe - 1 ::% I LOT 7A LOT 1 ,a6,6]]Sp R naeKlN PgW11 // 1 — 1, 1 ho 68 u1 \ I LOT 6 LOT 13 � ♦ � ' g1 I � �OT 6A SUMMARY OF PROPOSED WETLAND IMPACTS �. rb~-1i / 9 1 LOT 5 " L^T L• WETLAND IMPACT #1 = 8,457 SQ FT = 0.1941 ACRES LOT 14 M� �]c p a z£ r£ o c s rn c£ m £ aI�aO°i so-2 f I I Y Y '- Y I --1 �'— nalu e.. , ^� 1 PARK 8 PARK 1 § 3-- -,2 I Ja Joa Jed d d 0• / / LOT 1 / I 2a', n I I LOT 4B LOT 15 1 i LOT 4 _ L• —Tr, , I ,„, LOT 4A ` �tMANUEL-fty- - - LOT 3 1 I l_?n o'er'a k / 1 LOT 3g LOT 3 �LOT 16 + II 1 1 r�z^ �z oz ' I .n I LOT 3A +I I jI d o A fix£ ^d3£ LOT 2 1 �J $ I--'n 11.221 Sp.n I F••^• ;. i % off- o$= s5td off- o�- o oa_ oad usn a» J � Jn^ J^d J"d I Jdd Jdd Jmd Jnd II S i LOT 26 LOT 17 -- j �t'- �1 rat (f I LOT 2 LOT 2A LOT 1 LOT 2 LOT 3 1 n LOT x rt I �I •-�'£ sV�"e rl�£ ate£ u]�£ tom£ net mom£ m2£ 1B r'fY f I--Sy I-xe 15 ' Cr LOT 18 / J 9 0�3 o§Q o§Q o§o o§ oe$ 0- o^s os� PRIVATE COMMON S I LOT 1 I Joo J•o J,a Jd J,je JOe Jro Jeo J�o , '; OPEN SPACE D I ' se1,1:]so-n LOT JA L — I^ - �v-cic"in9eoE-B$f{`6- - - - f n _ i GLENiVE- GL i�1 OD DRI[L' �� �, i � -.nr 1 �=N-$ y x ^ � I � T2LOT D mI m dp � � �e � � :Le„x ndp £ < T. ; - � LOT 2C I F - rr..a r.." r^a r.a rna r r8s jj i 1 I rJ J o c off= o 0 o a z 99 = �\ 1 I I LOT 2B� - J J l J�o Judd Jad J "d Jgo' Jdd OZe OZo �J ♦ , I LOT 2A `1 Na�j In�F! i-- LOT 4 r �-t' r-'S r''� F- F- Y r $]) o_pF" oa§ 04� o^ og o9a o"6 o;R o-a O J f -'wo J`ed Je3 Jod -ted Jed Ij J.Scd J.`:o -12- Jed LOT 12 BROIZASIDE S'11ADOiF E(jr DP.IL'E - outnnw �i ar nrv� _ _ f j f LOT 1 I g \ll / �' �" 2£ N� ote r� m ep e£ £ LOT 11 rn 01 o LOT l l Y N � "1Y any �y qY x o�� Il.sw]cn .; mk I I J I r0 5.p Or a'er rO y Or-5 Or S a Or e I 'o�^d0r 83 Or^nS^ HO O0 Ve-IFp- ~Or Jae 6J-o J _ Scale In Feet a�• /' I L 80 0 80 _ 24 0 24 --6! a- f r ra access imn -y r No,eerss smw Scale in Metera - - V/'l +171r �� - _ _ - �� RaH— - - - - - - - DRAWING TE: 1 28 14 -- -- xolti°n ro avxuunrs su°a la T� — Engi—'r,g and Surveying Inc. r*x<I< 1 c9'1 t 15•i.+.14a1 s°JaiDD .w.x:nr�nee,.m•mm�:r..,�ywr-on /12661 p O --, I� tV 0 �— f _ d x ti p p W O C) Qo I\ N i Y] o N .p 0 N \ _ CCA ILI: w E U) I\ U (� U c _ 0)�.C) I I 0 Q N o � / U a 0 II L1J 3 ) U C QO °14. e N � II 'al 0 O .0 a� d I 4 r +J c r` C r'n �. II I — 0 Ln C: o W C a 0 3 � � / � Ld OQ _j y� U � � 0 0 > o � o a1i � 0 � 00c _ 0 3 0 Iz ch -r Io Oe aNV 113M '1SIX Q Lo II II o a +' 0 om m _ t a z — z CL t=- N I` c L 0 a c F w c3 �o +� V N Q 0 0 T / zoo /era > > > 7 E ai co > � Fnc� U „00,00*0 m com Lol �I� I Ni C� Ln � m � 0 3 ! pU NI > D z I I L N @� Q W I m s o ICJ ' I -0 �, ,n • Q (CD .F E - - - -E-- Q1 0,C I19 . i C in 3 - 'Q) m c c L) C)) 0 .° C a. W WA TE1,S OF THE k-S DFUNC-A%7'01-1 P-FPOR-T LA-kRUL e. LUN S"23.DIV(StON, Z�O.Z FMAN, MONTANA october.u,.2008 3w r Lka �� ��ca� f2i� - •;�. - ` i i, `.• ,vY d �:.•�� tilt T -�� � ' 'i4�i�. , �•q �,'��'V�, -,'r,1. j� ,gig.'' f'^IJI� a 7��ft11 � I e �,:� ���,'(yK��1`�t I I Y. 1 I }I}�' 3 (' 1 II I�. I i ,I�,i , I S 11 - �t! I r. ire' 1• 1 ail. d I iai , I �,�(, ���f, ri I 1 i r 1 1. r p I r: ` ! ��_ Pr}i'• ,i �,, I E h t �fi il� ���,\ �, + � e' {tlt �ty���� )a\e+V14oiI 1It rC 11��I r f ' I •�Yd n � �.�11 Il 1,. y •�, t (� �'. }1 " •��. I ,� f i - f 1( i a I i,it.1 a ),��'t, 1 r. I,R i\r! I ?it 1{.. y�A�)� ��i���Q�� ��1•�Y�I Jti.�itl 171i C.j1 t;'Ir':�'�}'�,.Vf���yir��l }j ri -.Ill }I � �,a `f1(fl fi 11:�.'.���+IP,I r Prepared fora Prepared be: Hii r Ley Pevelopm ent R,Tl�LJ e�'3'a:j 11-T Environmental Services 8353 Saddle Mountain[load•Bozeman,Montana 59715 c TAI�,L.E OF CONTENTS SECTION PAGE J..O PROJEGTDESCRIPTION....................................................................................................x 1..1 Site WatevWaus........................................................ ..1 1.2 cUmate.................................................................................................................................2 2.0 WETLAND DC-UNEA'T-ION METHODS............................................................................S 2.1. Methods...............................................................................................................................5 2.2 TechvdrmL Criteria................................................................................................................5 3.0 WETLAND DELINEATION P-es tLTS.............................................................................8 s.-.L NRC.s soul.5urve,� Results....................................................................... ..................... .9 3.2 W-1.-r�aXteY Creel'e- Lower PereKMLOIL R Verivlt..............................................................:L0 4.0 SLAMMAR.Y........................................................... x2 ........................................................... 5.0 RET=ERENCGS .................................................................................................................� T IC,I.tRE 1..0- QMadrovugle Topographic Map................................................ FIGI,tRE 2.0- eallativ,,eounto Oils Map showiv q Laurel clew subdCvistow...............................4 TABCE x.0-su.vuvKCIrU of Attributes of Waters of the 14s ......................................................1.2 APPENDIX A - WeUclv�d Petern&LvLatiaw Data Forms - Western Mouwtatms, vaLLeUs, av,.d COAst R.egiow APPENDIX-R,- NaturaL Resource Comervatiow Service Map avvd Data APPENDIX C- NaturAL Resource CLivwate Data APPENDIX D -T'hoto Log GXFhC617A - Waters Of the Lts Map laurel elev�..srchdly�.siov,.t-uat� t F s pelir��i' r.,�et xc�� l 1.0 >PRO.TTCT DESCRIPTION The original delineation for the Laurel Glen Subdivision was completed in November 2001. US Army Corps of Engineers(USACE) Permit 2001-90-847 was approved on October 15, 2002, and expired on October 15, 2007. Phases 3and 4 of the subdivision encompassing Baxter Creek and Baxter Ditch (Figure 2.0) were never developed. Hinesley Development has submitted a new plat application to the City of Bozeman for the final development phases. Over five years have elapsed since the initial delineation. The wetland boundaries associated with Baxter Creek and Baxter Ditch were re-delineated on June 24, 2008. Annual field investigations conducted since 2001 indicated that the wetland boundaries for Baxter Creek had shifted as a result of the change in land use from flood irrigated pasture to residential. Based on the 2008 delineation results the extent of the wetland fringe decreased i❑ the area west of Baxter Creek between Annie Street and Glenwood Drive and cast of Baxter Creek north of Annie Street as shown in Exhibit A,the Wetlands Impact Summary,Laurel Glen Subdivision, Phases 3 and 4. The entire subdivision encompasses 157 acres located in the East '/z of the SW % and the West of the Southeast '/ of Section 4, Township 2 South and Range 5 Fast, Gallatin County (Figure 1). Durston Road parallels the south property boundary. The east property boundary lies 0.25 miles west of Cottonwood Road and the west property boundary lies 0.25 miles east of Gooch Mill Road. The Gallatin County Soil Survey classifies the project landfonns as stream terraces and alluvial fans formed on loamy alluvium parent material. The USACE requires a permit for tho discharge of fill material into waters of the US in accordance with Section 404 of the Clean Water Act (CWA 1986). A Supremc Court 2001 decision in the case of the Solid Waste Agency of Norlhern Cook County versus US Army Corps of Engineers (SWANCC) limited the federal authority under the Clean Water act to regulate certain isolated wetlands. ]n light of the Court's decision, waters of the US as it applies to the jurisdictional limits of the authority of the USACE include the area below the ordinary high water mark(OHWM) of stream channels and lakes or ponds connected to the tributary system, and wetlands adjacent to these waters. The jurisdictional status of wetlands depends on the presence or absence of a connection and/or proximity (meaning bordering,contiguous, or neighboring)to waters of the US. Jurisdictional wetland boundaries were flagged based on soil, vegetation, and hydrological data collected in the field by Vaughn Environmental Services, Bozeman, Montana. The wetland boundaries and data collection points were surveyed and mapped by C&H Engineering and Surveying, Inc. of 13ozeman, Montana (Exhibit A). This report documents the project background, delineation methodology, and investigation findings in Sections 1.0,2.0, and 3.0,respectively.Appendices A through D include the data sheets, soil map and data, climate data, and photo log, respectively. Exhibit A shows the boundaries of the project waters of the US and a summary of the proposed wetland impacts. The report will be submitted to the Helena Regulatory Branch of the USACE with the Joint 310/404 permit application. 1.1 SITE WATERWAYS Three perennial waterways traverse the property; Baxter Creek, Baxter Ditch, and a tributary to Aajker Creek. Baxter Creek originates from the Farmer's Canal south of US 191 and traverses the east half of the project site from the south to north property boundaries. The third waterway is referred to as the Baxter Ditch, an unnamed tributary to Baxter Creek. The creek is not identified on Figure 2.0 although the alignment is evident on the aerial photograph. The ditch was originally diverted from the Maynard-Border Ditch located south of the project. "rite segment of Baxter Ditch from West Babcock Road to Durston Road was relocated to the west side of Cottonwood Road in 1998 as part of a mitigation project for an adjacent development. Once it crosses Durston Road, the ditch flows north through the Lamel Glen 5ubd!v4siaw wiot--ergs af;thet r s belLvir�tiara Kcna�t paw adjacent landowner's property until it enters and exits through the northeast corner of Laurel Glen. The i confluence of Baxter Ditch and i3axter Creek is approximately 1.5 miles north of the project site. An unnamed tributary to Aajker Creek flows through the southwest corner of the property,joining Aajker Creek midway along the west boundary (Figure 2). Impacts to the unnamed tributary were included in the 2002 404 permit. Water sources for the project drainages include groundwater discharge, springs,precipitation,and irrigation ;flows. An extensive system of waterways originates in the Gallatin Valley, flowing in a northerly direction to the Cast Gallatin River. Baxter Creek, Baxter Ditch, and Aajker Creek are tributaries of the East Gallatin River and, therefore, are considered Waters of the US. Impacts to the Baxter Creek and Baxter Ditch will require a 404 permit. Baxter Creek and Baxter Ditch are perennial streams that fall under the jurisdiction of the Board of Supervisors of local Conservation Districts and the Montana Department of Fish, Wildlife and Parks (MFWP). Any project including the construction of new facilities or the modification, operation, and maintenance of an existing facility that may affect the natural existing shape and form of the creeks or its banks or tributaries will require 310 permits from the GCCD. 1.2 CLIMATE The Bozeman area climate generally resembles that of a middle latitude steppe, with relatively long cold winters and short cool summers (111ac 1991). The region comprises a mountain complex within the steppe region, resulting in orographic effects that produce a local, cooler and wetter climate. Peak runoff generally occurs during the spring from snowmelt and combined snowmelt/rainfall events. These events produce relatively long periods of runoff. Summer thunderstorms also contribute to peal: runoff although they are generally short in duration. The annual pattern of precipitation typically results in increasing precipitation from March to a peak in June, a decline through mid summer, another increase in late August to a second, smaller peak in September, followed by a general decline to the yearly low in February(Pac et al 1993). The annual temperature regime of the study area is generally characterised by significant seasonal variations. Winters are typically long and cold with subfreezing average temperatures from November to March. Average annual precipitation ranges from 13 inches per year at the lower elevations to 50 inches per year at the higher elevations in the Bridger Range (MRCS 1972) north of Bozeman. Although the average annual precipitation is low enough to classify most of the area as semi-arid, about 70 percent of the annual total precipitation normally falls during the April to September growing season. The site ranges in elevation from approximately 4,760 feet above mean sea level (anisl) at the south boundary to 4,740 feet amsl at the north boundary. The closest meteorological station to the study area is at Montana State University located two and one-half miles southeast of the project at 4,860 feet amsl. Records frotn 1901 to 1990 indicate that the average annual precipitation is 19.25 inches with an average total snowfall of 92.1 inches(Appendix C). The average temperature is 44.2 degrees Fahrenheit (USDA 1990). The mean annual precipitation rate recorded for the predominant soil map unit, the Lamoose silt loam (537A), is 12 to 18 inches(Appendix B). �,.�i w su6dGyisfoyl watr ft, he us p�Giweat at. tp rt page y3 rvm1A na t eccvnmx+n mnumm+r n um mnryn ,tA'�'r,uuw+nu.+n I,IMII.iC11 wml,' ,�,� n �•1 y� u Y.�ptP11�'Fq �r,.JI� r` �, �.rl�� k`Y�f;, '�. ''l�tLIM 'Ill''a... ,�,,; .— •j, S. 'r All AQ •air �'• wr^ P• •r ��•' �''•• '. i•,P�.�y,,;k(^,��' '•` r•1 i yy nA Ili _ _ 1 a •tom I 1 r�� ;i'�s,•. �. 1 r"" .�' .i•r"' f' ,�\�••}}S -•'1� �'' �iw• -ly 1j ;�n'd+td - �T.' t41 .,1 ,v, t, '•t'•',' v.•,iv'+ NIfit .... 'l f�vf '`�'.� Y.p;,L't' 1.r t-�J .'•-.1 , `I •f•�`'' Ci„ �+• �:•• ..•.J r ��--�' '$ •_• r...1 . � � . ,�� }jam,�._; �� + Lite .�:. •fir . . ''4 •� _ �•• . k:� r �.•�d�,- �A• ,1 rl • I 1 I � �� � .t 1 �r i•.1;�.r.:'tin:.. r° I n'�jc"i•.r 4�,—fir;•-^� - /. :/�."�_.�A� r. .... .•wT�� .sA.r u.n r•f.l rlA � �e�s{�,r. I mom.. ..�.,w=•�v_..rs�� ��r t J —., o:f:. �•y�,^t::ti r�•y i'.::' � Y\yy�yAl Y.iV i:——.��. n...w'ns„aty .: '.:,f w.r.— f��«'.,.�,'<s►(�..... 1'f �•••�•�MrM,•+•J�Ir�,ti IwM \TW H .YM'.:..�•^ Lf9/M.NLdMN4\ Cw::.i'? ":r nn...r•a�•+a .'._.�.G_ � tmumt omen uc 1'�rn4�.�4w..r�1,�M�Y,,wi1•.wr�» •1 t�!��^ ..V.���•�a, .�•� w.w•• r.,�•.r""r...��i7�.w.•M�'�"^.�"�„ r+ '.w:i:S1IW71.'`ir..iu1 r '6omlpetl;MT;SpsN:1"�O�IOMI 7,614Mt 4,3t38Ft,1 Ml�1.003",1 cm=390N1 ll!igurc .1.0 USGS 7.5' Bozeman Quadratuagie r1,'opogrii chic Mal) WWI i �r. � I `�_ S i+ `t'f ,i/h� •r rir-t-r, •r�-j7j r r ,1��_ p J a 1 r.01 I 1 i� p 1f iS lll 'nZ�i yyi� !•i •.�"� .!.�ryl�• + �•',�� �'� it } 1, All, } �r kill u ;, C•2 !s r 1. oil" �.. rI1 Sr". J . IC joy Cgurel cLev�Subl�i✓isin« wgc-e!rs�f the GiS n�lirv��f%�h,r�eort �qS 2.0 WATIERS OF THE, Ufa >fD1i,Ll NY-P A'Ef'RON IJ1 1JTHODDS f 2.1 METHODS Waters of the US including jurisdictional wetlands within the study area were identified on June 24, 2008, using methodology developed by the USACE and other federal agencies for implementation of Section 404 of the CWA. Delineation procedures involved a review of existing site-specific information and completion of an onsite field investigation based on guidelines for the Routine Determination Method for areas greater than five acres presented in the Field Guide for Wetland Delineation(WTI 1995). The Routine Level-2 Onsite Determination Method employs primarily qualitative procedures. Sample plots (approximately a 15-foot radius for herbaceous species) are established within potential wetlands based on changes in plant communities, plant diversity, topography, and soil type. Data points are generally located parallel to watercourses, perpendicular to the apparent groundwater hydraulic gradient, and/or along topographical breaks. Vegetation composition, hydrology, and soil characteristics are assessed at each data collection point(identified as sample plot—SP-). If all three parameters exhibit positive wetland indictors, the area represented by the sample plot is classified as wetland. If any one of the parameters does not display a positive indicator,the area is classified as a non-wetland or upland. The jurisdictional authority of the USACE over wetlands identified in the field depends on the presence or absence of a surface water connection and/or proximity to waters of the US. The Interim Version of the Wetland Determination Data Form included as Appendix C in the Interim Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region approved in April 2008 was used to report the wetland criteria for Baxter Creek. Data sheets for test pits SPA through SP-4 are included in Appendix A. Soil test pit(SP- 1) was excavated in upland on the upper bench adjacent to the west side of Baxter Creek between Glenwood Drive and Annie Street. Test pits SP-2 and SP-3 were dug in the low wetland terrace next to the west side of Baxter Creek between Glenwood and Annie streets. Test pit SP-4 was located in the floodplain east of Baxter Creek and north of Annie Street. Thu boundaries of the waters of the US are shown on Exhibit A. The wetland characteristics and data sheet for Baxter Ditch from the 2001 delineation are included in Appendix A. The wetland boundaries associated with the creek had not changed since 2001. 2.2 TECCHMCAL OUTER1A A wetland must meet three technical criteria for it to be categorized as jurisdictional. The 'USACE(259 Federal Register 853532) and the Environmental Protection Agency(47 FR 31810)jointly define wetlands as "areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support,a prevalence of vegetation typically adapted for life in saturated soil conditions." The following conditions must be present for an area to be considered a jurisdictional wetland. 1. Hydr•ophytic Vegetation: Defined as plant species normally or commonly adapted to saturation of sufficient duration to cause anaerobic conditions in the root zone. 2. Wetland Hydrology: Defined as hydrology supported by sources of water that result in saturated, flooded, or ponded soil conditions. 3. Hydr-ic Soils: Defined as soil that forms under conditions of saturation, flooding, or pending long enough during the growing season to develop anaerobic conditions in the upper part(59 Fed.Reg.35680,7/13/94). (_pccrC/Gler2 su6diI/isipvr• watej�s olth a,s L) li" .atinr,�nepget n 14ydrophytic Vpgetutioaal Plants must be physiologically or morphologically adapted to saturated or anaerobic soil conditions to grow in wetlands. The USACL and the US Fish and Wildlife Sell ice (USFWS) have determined the estimated probability of finding representative wetland species within specified areas under natural conditions. Accordingly, plants may be categorized as obligate (013L), facultative wetland (FACW-+-, FACW, FACW-), facultative (FAC-l-, FAC, FAC-), facultative upland (FACU-F, FACU, FACU-), or upland (UPL-) in decreasing order of moisture dependence or tolerance. Reed (1988) uses a plus (+) sign or (-) sign to indicate a more or less hydrophytic tendency of a particular wetland indicator frequency for the three facultative types of indicators. Obligate species occur greater than 99 percent of the time in a wetland. Facultative wetland species have a 67 to 99 percent probability of occurring in a wetland. Facultative species exhibit a 34 to 67 percent probability of occurring in a wetland. Facultative upland species have a 67 to 99 percent probability of occurring in a non-wetland and upland species have a greater than 99 percent probability of occurring in a non-wetland. Species with an indicator status of OBL, FACW(+-/-),FAC+,or FAC are considered hydrophytic. The new wetland criteria compiled for the Western Mountains, Valleys, and Coast Regions allows for use of the dominance test, prevalence index, morphological adaptations, wetland non-vascular plants, and problematic hydroplitic vegetation. The dominance test applied to this site. The sample plots were classified as having hydrophytic vegetation if more than 50 percent of the dominant plant species across all strata are rated OBL, FACW,or FAC. The vegetation indicator status for this investigation was derived from the National List of Plant Species that Occur in Wetlands, Region 9, Northwest (Resource Management Group, Inc. 1993). Taxonomic references included Dorn 1,984, Hitchcoelc 1971, Lackscliewitz 1991, and Lesiea and Husby 2001. The name, indicator status, and percent of absolute cover of individual species within each vegetation stratum was recorded on the data forms in descending order of abundance(Appendix A). Wetland Hydrology Technical criteria for wetland hydrology guidelines have been established as "permanent or periodic inundation, or soil saturation within 12 inches of the ground surface for a significant period (usually 14 days or more or 12.5 percent of the growing season)during the growing season"(WTI 1995). The minimum duration required for soil saturation is five percent of the growing season in consecutive days. Inundation or saturation for periods less than 5 percent of the growing season is evidence of non- wetland conditions. Systems with continuous inundation or saturation betiveen 5 and 12.5 percent of the growing season may or may not be jurisdictional wetlands based on other criteria. The growing season is defined for purposes of this report as the number of days where there is a 50 percent probability that the minimum daily temperature is greater than or equal to 28' Fahrenheit(Environmental Laboratory 1987). ,The growing season recorded for the meteorological station at MSU extends from May 4 to October 2 (USDA 1996). Approximately 19 days of saturation would be. required to meet the wetland hydrology criterion fora specific wetland. The description for the predominant soil map unit, the Lamoose silt loam (537A),lists 90 to 110 frost-free days. The revised criteria for wetland hydrology lists several primary indicators including direct observations of surface water, high water table, saturation, water marks, sediment deposits, drift deposits, algal mat or crust, iron deposits, surface soil cracks, inundation visible on aerial imagery, sparsely vegetated concave surface, water-stained leaves, salt crust, aquatic invertebrates, hydrogen sulfide odor, oxidized rhizospheres along living roots, presence of reduced iron, recent iron reduction in tilled soils, stunted or stressed plants. Secondary indicators included water-stained leaves, drainage patterns, dry- season water table, saturation visible on aerial imagery, geomorphic position, shallow aquitard, FAC- Neutral test,raised ant moulds and frost-heave hummocks. field observations were used to determine LnurN.l ch I-ic1) Fyrsr.'nr^. WAtp &k's Uelikt -1.x'Ppnrt �g existing wetland hydrology. A positive indication of wetland hydrology requires either one primary indicator or two or more secondary indicators. Hydrie SoilS Soil is considered saturated when the capillary fringe occurs within a major portion of the root zone(within 12 inches of the surface). The Natural Resource Conservation Service(NRCS), formerly the Soil Conservation Service(SCS), in cooperation with the National Technical Committee for Hydric Soils (NTCHS), has compiled a list of hydric soils in the United States. The list identifies soil series mapped by the NRCS that meet the hydric criteria. Upland (non-wetland) soils may have inclusions of hydric soils that may not be demarcated on NRCS maps. Field examination of site-specific soil characteristics is necessary to confirm the presence of hydric soils. The profile description presented on the data form reflects site soil conditions as determined from soil pits, not the NRCS designation. The NRCS soil survey information reviewed for the project area is included in Appendix B. Hydric soils exhibit certain physical characteristics that can be observed visually. These characteristics, or indicators, listed on the revised form include the presence of Histosols, Histic Epipedon, black histic, hydrogen sulfide depleted below dark surface, thick dark surface, sandy mucky mineral,sandy gleyed matrix, sandy redox, stripped matrix, loamy mucky mineral, loamy gtcycd matrix, depleted matrix, redox dark surface, depleted dark surface, and redox depressions. Soil colors are determined using a Munsell soil color chart (Munsell 1988). The colorimetric determination is to be made immediately below the"A" horizon or 10 inches whichever is less. Wetland soils can be assumed to be present in any plant community where all the dominant species have an indicator status of OBL or FACW and the wetland boundary is abrupt(.Environmental Laboratory 1987). r acrt3l-144'St"b4l"O.542a Wat.r4 o.(_Mf us lbe,U1 eat, m.rzr, rt Paae 3.0 WATERS 0Y Tll'lE US DELWEA.TION RE,STJLTS The original delineation for the Laurel Glen Subdivision was completed in November 2001. Permit 2001-90-847 was approved on October 15, 2002, and expired on October 15, 2007. Phases 3 and 4 of the subdivision encompassing Baxter Creck and Baxter Ditch were never developed. The wetland boundaries of Baxter Creek were re-delineated by Vaughn Environmental Services on .tune 24, 2008. C&H Engineering and Surveying completed the survey and map. The land use changed from flood irrigated pasture to residential between 2002 and 2008. The extent of the Baxter Creek riverine wetlands decreased since 2002 as shown on exhibit A. In 2001, the Baxter Creels riparian corridor encompassed approximately 7.8 acres. The current extent of the wetlands associated with Baxter Creek total 5.4 acres a reduction of 2.4 acres. Wetland boundaries were flagged based on the presence of hydrophytic vegetation, primary and/or secondary hydrologic indicators, and hydric soils. Wetland types were based on similarities in physiographic, hydrologic, and plant community characteristics. Site-specific wetland parameters and numbered data collection points are described on the Wetland Determination Data Forms for the Western Mountains,Valleys, and Coast Region included in Appendix A. The Wetlands Impact Summary(Exhibit A) shows the boundaries of project waters of the US and the proposed wetland impacts associated with Phases 3 and 4. The wetland investigation focused on the floodplain adjacent to Baxter Creek where preliminary investigations indicated that the species dominance had changed since 2002. The boundary of the wetland fringe was redefined on the west side of Baxter Creel: between Glenwood Drive and Annie Street and on the east side of Baxter Creek within 200 feet of Annie Street. hour soil test pits were excavated to determine the wetland and upland boundary. Test pit one (SP-1) was located on an upland terrace 25 feet from the edge of the creek. Test pits two through four (SP-2 through SPA) were located in the wetland terrace adjacent to Baxter Creek. The reach of Baxter Creek within 200 feet of Durston Road historically encompassed an on- stream reservoir. Tile lieadgate in the dam was removed in 2003. The creek channel reestablished itself through this reach from 2003 to 2007. The concrete berms and culvert associated with the dam were removed in fall 2007 as part of mitigation for the original permit. The channel was restored and revegetated through the culverted section. Exhibit A shows the banks of the reestablished channel. The floodplain of Baxter Creek was expanded in 2007 for mitigation. The mitigation site north of Durston Road encompasses 0.7 acres. The mitigation area south of Annie Street encompasses 0.8 acres. The wetland boundaries associated with Baxter Ditch were also reviewed during the 2008 investigation. The boundaries had not changed since the original delineation. Wetland characteristics for Baxter Ditch collected during the 2001 investigation are included in Section 3.3. Baxter Creek and Baxter Ditch are classified as lower perennial riverine wetlands with rock bottoms tinder the Smith Hydrogeomorphic System(Smith et al. 1995). The riverine fringe is dominated by errrergent vegetation (Cowardin et al. 1979). The water regime is permanently flooded. Baxter Creel( flows north, ultimately discharging to the East Gallatin River approximately 10.5 miles north of the project site. Riverine wetlands occur in floodplains and riparian corridors in association with stream channels(Hansen et al. 1995). Water usually, but not always, flows in riverine systems. Dominant water sources are overbank flow from the channel or subsurface hydraulic connections between the stream channel and wetlands. Section 3.1 discusses tite Natural Resource Conservation Service(NRCS) soil survey information for the project. Section 3.2 discusses the characteristics of the Baxter Creel(wetland fringe that were rc- Glrrrr-rl e �suhdl✓iciprti briAters n f'l.-he t-cs neliwegtiav�.l�nort v�,��� delineated. Section 3.3 addresses the wetland characteristics of Baxter Ditch collected in 2001. 1'he data is summarized on the Wetland Determination Data Forms included in Appendix A. 'fire NRCS soil map and soil descriptions are included in Appendix B. The NRCS climate data for the MSU station is included in Appendix C. Photographs of the data collection points are presented in Appendix D. The redefined boundaries of Baxter Creek(W-1) are shown oil E-xhibit A. 3.1 NRCS SOIL SURVEY The Baxter Creek riparian corridor lies within the Lamoose silt loam map unit(537A)found on 0 to 2 percent slopes. The Lamoose silt loam is taxonomically classified as a tine-loamy over sandy or sandy-skeletal, mixed, superactive, calcareous, frigid Typic Lndoaquolls. It is listed on the hydric soils report provided by the NRCS. The parent material is comprised of alluvium found on stream terraces. The soil depth is greater than 60 inches and the drainage class is poorly drained. The upland areas outside the corridor are characterized by the Hyalite-Beaverton Complex (448A), Turner loam (457A), and Amsterdam-Quagle silt loam (453B). These soils are well-drained silt foams found on alluvial fans, stream terraces, and relict stream terraces. The soils were classified as non- hydric and categorized as Typic Argiustolls,Typic Argiborolls, and Typic Haploborolls,respectively. 3.2 W-X BAXTER CREEK—LOWER PERENNIAL RTVERMi Baxter Creek originates from the Farmer's Canal located approximately 1.5 miles south of Durston Road. The channel width ranges from 10 to 20 feet. Surface water depths vary between I and 2 feet. Four test pits were excavated to determine the boundary between wetland and upland. Test pit one (SP-1) was located on an upland bench 25 feet from the channel (Photos 1.0 and 2.0). The sample plot met the criterion for hydrophytic vegetation but did not meet the criteria for hydrology and hydric soil. The remaining test pits were located on wetland terraces adjacent to the creek. Soil test pits two through four(SP-2 through SP-4) met the wetland criteria for plants,hydrology and soil(Photos 3.0 through 6.0). SOM TEST PIT ONE-UPLAND Vegetation The upland bench adjacent to the west side of Baxter Creek between Glenwood Drive and Annie Street was dominated by meadow foxtail (Alopecurus pratensis — FACW). A shift in plant dominance has occurred since the 2002 delineation. There was less Baltic rush (Juncos balticus — OBL) and Nebraska sedge(Carex nebrascensis—OBL). Sample plot SP-I was dominated by meadow foxtail (85 percent:), meeting the dominance test for hydrophytic vegetation. Secondary upland species included smooth brome (Bromus inerinis — NL,), Kentucky bluegrass (Poa pratensis — FACU+), musk thistle (Carduus nutrias —NL), common dandelion (Taraxacum officinale—NL),and wild mustard(Brassica kaber—NL). Soil Soil test pit one (SP-1) was excavated to 18 inches below the ground surface (bgs). The profile from 0 to 12 inches revealed a friable,agriculturally amended organic layer(7.5 YR 3/4)without rocks or redox concentrations, The soil did not exhibit any hydric soil indicators. Hydrolotry The soil in SP-I was dry with no evidence of saturation within the upper 12 inches of the profile. There were no wetland hydrology indicators. Lpurr.'!, ley.SubdLyisiow W(�'.rs of/-!�e�(.S 7�Flirte/at%nra rc�2port t'����1� SOIL TEST PITS TWO,TIME E AND FOUR-WETLAND Test pit SP-2 was located on a terrace five feet from the west edge of the channel. Test pit SP-3 was located on a low bench approximately 24 inches high and west of the channel. Test pit SP-4 was located in the floodplain approximately 10 feet from the cast side of the channel and north of Annie Street. Vegetation Vegetation within the SP-2, SP-3, and SPA sample plots was dominated by meadow i'oxtail, beaked sedge (Carer utric:data — OBL), and Nebraska sedge (Carex nebrascensis — OBL). Isolated clusters of Bebb willow (Safix bebbiana — FACW) and thin-leaf alder (Alnus tenuifolia— FACW) lined the streambanks. One-hundred percent of the dominant species were hydrophytic. Soil Test pit SP-2 was excavated to 12 inches below the ground surface. The matrix color in the soil profile was gleyed (31 10 Y). The soil was loam with cobbles observed at 10 inches bgs. Redox concentrations (10 YR 3/3) were observed in the relict organic layer. The loamy gleyed matrix (F2) provided a positive indication of hydric soil. The soil profile for SP-3 from 0 to 6 inches revealed a plastic silt loam (10 YR 2/1)without redox features. From 8 to 16 inches, the soil matrix color was 10 YR 2/1 with faint, few, fine redox concentrations(10 YR 3/4). The presence of a redox dark surface(F6) is a hydric soil indicator. Test pit SP-4 revealed the presence of a silt loam (10 YR 2/2) without redox features from 0 to 8 inches. The soil profile from 8 to 16 inches revealed a silt loans (IOYR 2/1) with depletions(10 YR 4/1) in the matrix. The depleted matrix(133)was a positive hydric soil indicator. Hydrology The ground was saturated to the surface in sample plot SP-2. Saturation was observed at 6 inches bgs in sample plot SP-3. The soil profile at SP-4 was saturated at 10 inches bgs. Baxter Creek contained surface water ranging in depth from one to two feet. Sample plots S11-2, SP-3, and SP-4 exhibited primary indicators of wetland hydrology. 3.3 W-2 BA.XTER DI`]CC1I—LOWER PERE,NNIAL RI.VERINE, The following information was collected during the 2001 delineation. Baxter Ditch flows through the northeast corner of the property (Photo 7.0). The Gallatin County Conservation District identifies Baxter Ditch as an unnamed tributary of Baxter Creek and a perennial stream. The ditch was historically a natural stream manipulated for irrigation purposes in the 1950's. The segment of Baxter Ditch from West Babcock Road to Durston Road was relocated to the west side of Cottonwood Road in 1998 as part of a mitigation project for an adjacent development. The new location is not shown on Figure 2 although the alignment is evident on the aerial photograph. North of Durston Road, the ditch flows northwest through the adjacent landowner's property until it crosses the project site, eventually draining into Baxter Creek 1.5 miles north of the north property boundary. The riverine system encompasses 0.17 acres with an associated palustrine fringe characterized by saturated conditions. Vegetation The wetland vegetation within this ditch channel was primarily confined to the channel edges and small, shallow adjacent basins. Species along the channel included meadow(oxtail, Kentucky bluegrass, and slender sedge. In low, wetter areas associated with standing or ponded water, beaked sedge and c auril elew.suhra'i✓,'<io�rt. waters o�the u_s DLbaratlav,R!n� n� 11 Nebraska sedge dominate. Upland vegetation included smooth brome (,Broinus inernms NL), Canada thistle and quackgrass (Agrop}iron repens,NACU), Swills The soil profile at DP-14 exhibited an organic thatch layer from 0 to 2 inches and very dark brown soils (IOYR 2/2) from 2 to 14 inches. No mottles were observed within the upper 14 inches, Small cobbles were noted at 14 inches. The soils wore mapped as the well-drained Hyalite-Beaverton Complex(448B),non-hydric soils classified as Typic Argiustalls. Hydrology The creek flows year-round, fed by groundwater, springs, and surface runoff. The surface water channel is 12 to 18 inches wide and less than two feet deep. The depth to saturated soil in DP-14 was 4 fnelies and free water was observed at 14 inches. LRUY.I CAN.,Su�1(,�GVISIO�t-Wld�"�y5 �' !�{..S DP.IdN.P,R�GpI�.1�pYf' j�q�Y�j z I 4.0 SUMMARY The original delineation for the Laurel Glen Subdivision was completed in November 2001. US Army Corps of Engineers(USACE) Permit 2001-90-847 was approved on October 15,2002, and expired on October 1.5, 2007. Phases 3 and 4of the subdivision located east of Laurel Parkway (Figure 2.0)were never developed. Hinseley Development has resubmitted a plat application to the City of Bozeman for the final phases. The Baxter Creek riverine wetlands were re-delineated on June 24, 2008, as part of the 404 permit process. Five years have elapsed since the initial delineation. The wetland designation, wetland classification,jurisdictional status, and areal extent for Baxter Creek and Baxter Ditch are listed in Table 1.0. 'fable 1.0 Summary of Attributes of Waters of the US ffydrogcomorphicr^ USACE Wetland Designation Areal Extent(acres) Class Smitb Jurisdictional Status W-1! - Baxter Creelt Lower,Perennial Jurisdictional 5.4 Riverine,RB,PF W-2-Baxter Ditch Lower, Perennial Jurisdictional 0.17 Riverinc, RB,PF Total 5.57 R[3—Rock Bottom PP—Permanently Flooded Development activities resulting in the placement of fill in wetlands determined to be jurisdictional require a USACE Section 404 permit. Project-wide wetland impacts totaling less than 0.5 acres are administered under the Nationwide Permit program while impacts exceeding 0.5 acres in extent conic under the Individual Permit process. Compensatory miti ration will be required for the loss of any jurisdictional wetland over one-tenth of an acre at a ratio determined by the USACE. I-PewrCl. �f Su.hdl✓isiDrti bt�aPCrs a thr. H.s Ue(,ira�ati�iti 72[�part _ARO4 13 5.0 REFERtENCES Clean Water Act, Section 404. 1986. Federal Register- Regulatory Programs of the Corps of 2ngincers. Cowardin, Lewis M., Virginia Carter, Francis C. Golet, and Edward T. LaRce. 1979. Classification of Wetlands and Deepwater Habitats of the United States. FWS/OBS-79/31. Office of Biological Services,Fish and Wildlife Services, USDI, Washington, DC. Dorn, R.D. 1984. Vascular Plants of Montana. Mountain West Publishing,Wyoming, Environmental Laboratory. 1987. "Corps of Engineers Wetland Delineation Manual," 'Technical Report Y-87-1, U.S. Army Engineer Waterways Experiment Station,Vicksburg, Miss. Hitchcock, A.S. 1971. Manual of the Grasses of the United States, Volume One and Two. Dover Publications,New York. Lackschewitz_, K. 1991. Vascular Plants of West-Central Montana — Identification Guidebook. General Technical Report—277. Intermountain Research Station. USDA,Forest Service. Missoula,MT. Lesica, P., P. Husby. 2001. Field Guide to Montana's Wetland Vascular Plants. USDA Natural Resources Conservation Service,Bozeman,MT Munsell. 1988. Soil Color Charts. New Windsor,New York. Reed,P.B. Jr. 1988.National List of Plant Species That Occur in Wetlands: Montana 1988. Prepared by the U.S. Fish and Wildlifb Service,St.Petersburg,Florida. NERC-88/18.26. Reed, P.B. Jr. 1993. 1993 Supplement to List of Plant Species That Occur in Wetlands: Northwest (Region 9). Prepared by the U.S.Fish and Wildlife Service. Resource Management Group, Inc. 1993. National List of Plant Species That Occur in 'Wetlands, Region 9,Northwest. Prepared by the Resource Management Group. B.J. Sabine. Grand Haven, MI. Smith, R.D., A. Ammann, C. Bartoldus, 'and M.M. Brinson. 1995. An approach for assessing wetland functions using hydrogeomorphic classification, reference wetlands, and functional indices. Wetland Research Program Technical Report W.RP-DE-9. US Army Corps of Engineers Waterways Experiment Station. Vicksburg,MS. US Army Corps of Engineers,Personal communication with Vickie Sullivan,June 8,2004. US Department of Agriculture, Natural Resource Conservation Service 1990, WITS Climate Summary Data US Department of Agriculture Soil Conservation Service 1987. Hydric Soils of the US. In cooperation with the National Technical Committee for Hydric Soils. Washington DC. Western Wetland Flora—Field Office Guide to Plant Species. Natural Resources Conservation Service, Wetland Training Institute, Inc. (WTI). 1995. Field Guide for Wetland Delineation: 1987 Corps of Engineers Manual. Glenwood,NM. WTI 02-1. laurel.clef&, o f the u s nr./.i at�nH pnr�" pac�y¢ Websites: 1 USDA/NRCS Web Soil Survey,Gallatin County,accessed March 2007: ltttp:Hwebsuilsurvey.nres.usda.gov/app/ Gallatin County GIS Map Launcher http://webapps.gallatin.nit.gov/mapengin. t WETUAND DETEPMINATIDN DATA :FORms Waters of Che us ZDeUweation RepDlt-- tutereI IyCP.w Subdi✓i siow WETLAND DETERMINATION DATA FORM—Western Mountains,V8110ys,and Coast Region Protect/Site: Laurel. Glen Subdivision - Baxter Cr.CitylCounty: Eozeman/Gallatin Sampling Dole: 6-24-08 Appllcnnt/owneir: Bin(--sley Aevel;o ment/Chaxles Hinesley State: MT Sampling Point:RP- Investigalor(s):.g�bara Va»ghn/Rr2_an Gande�vr_�Seetioh,7otrWnsfifp,.Rango: C1/7 SW1/4, SV1/2 SE7/4. Sec.4, 'i'2S,R5E Lnndform(hlllslope,(arrara,:ole:):--r-LMtpjnjL�; Lopa(roliof•.(congnya,.convex,none): Subregion(LRR): Lsrl: Long;_ _ Datum: Soil Map Unit Nam .I., Lamoose silt loam (537A) NWlclnshiticatlon: hydric soil Are climatic I hydrologic conditions art the site I[Wcnl for this lime of year? Yes X No (If no,explain in Remarks.) Are Vegetation Soil or Hydrology significatttlydisturbed? Are'Normal Circumstances'present? Yes X No Are Vegetation Soil or Hydrology naturally problem4kic4. .(ir needed,explain any answers in'Remarks.) SUMMARY OF FIMDINGS— Attach site map showing sampling_point locations,triansects,important features,etc. Hydfophytic Vegefalloh Present? Yes X No is tha.S.amplod Area Hydric Sail Present? Yes 'No X within a Welland? Yes No' X Welland Hydrology Present? Ye:: No X Rcmorks: VEGETATION—Use scicintiFc narnes of plants,. Absolute Dominant IndicatorFPefcent ce Tostwor ishoet: Tree Stratum (Plot clze: ) %Cover .S� on ctes?. to 's of Dbminanl.Species _ OBL,FACW,.or FAC: 1 _ _ (A) mber of Dominant 3 _ _ Acrdss All Strati: (©I 4. of Dominant Species =Total Cover That Are OBL,FACW,or FAC: 100 (Na) So ll hru Slrel m (Plot size: ) Prevalence Index workshoet: 1, Taint'%Cover of: Mul(iply by.- 2. 3. OOL specie s x 1= 4 FACW species x 2= 5. FAC'speaies X 3= =Total Cover FACU species x 4= t-terb Stra Im (Plot size: 15-f t r.ad) UPL species x 5= 1 Alopecurus pratensis 85 yes FACW Column Totals: (A) (H) 2. Bromus inermic 5 no NL 3. Carduus nutana �2 no NL Brovalenco Index=SIA= 4 'Paraxacum of•ficinale 2 no NL tiydrophyuc Vogblatlon lndlcators: J. Brasoica kabcr a no .. NL X DominanceTetitis>A13% 0.. POD pratensis 5 no J_ PrcvnlcncalndoX9s's3At 7. MorpholoDicalAdaptptions'(P(ovldo sgpporling dafri In Reriraiks or on n.sepamte sheet) 8. _Welland Non-Vascular Planlst g, _ Problematic Hydrophyl(c Vegetation'(Explain) 10. rinditatdrs of hydrie boll and wetland hydrology must 11, be present,upless disturbed or ptoblemalle. 100 =Total Cover Woody Vine Slmtum (Plot aze:^ ) Hydrophytic Vegetation 2. — Present? Yes X No =Tolol CoVer Dare Ground in Herb 131raturri Remarks: US Army Corps of Engineers Westem Mountains,Valloys,and Coast-Inldrim Vcrslan $UIL &amPling Point: SP-1 Profile Description: (Doscribie-to•the depth noodod tod4eumontttlp lndientor'or confirm the absegco of.Indicatom j f Depth Mattlx Redox Fe9tueas _110-0 ,, Golor(mold) � Co1or(sir tiistl' 9i, Sy'n oGL r Texhrre . , Rellta[ks o to 16" 7.5 YR 3/4 organic addition, friable rT e: C=t;oncontraflon,D!Qolilelloft,RM=Roducdd'Wift CS=Coveted be Cohled Sand Grains•. 'Location: PL-Pore Unin M=Matrix. Hydrlo Sotl indicators:(Applicable to all LRRv,unlooc othorwlco noted.) ' Indicaton:for Problematic Hydrlc-Solle; _ Hlstosol(At) _, Sandy Redox.(S5) 2-cm Muck 010) _ Hist(o Epipedon(A2) ` Stripped Mrttrix(156) Red Parent Material(TF2) _ Black Hislic(A3) _ Loamy Mueky Mineral(F1)(except MLRA 1) _ Other(Explein in Remarks) _ Hydrogen Sulfide(A4) _ Loarny Gleyad Matrix(172) _ Depleted BaloW DwkBurfaca(Al 1) _ Depteled Matrix(F3) _ Thtck Dark Surface(Al2) _ Rbdoz DarkrSuiibcb(178) 'indleelars of Fiydibphylic Vegotation and Sandy MuckV Mineral,(81) _ Depleted Dario Surface(n) wetland hydrology most'be•prasant, Sandy Gleyad Matrix($4) Redo);Depre. slops(F8) unless disturbed or problemalic. Restrictivo'Layer or prosent): Type: Depth(inches): Hydiic Soil Praaant? Yoe No X Remarks: HYDROLOGY Wotland'Hydrology Indicators: er(mary Indloalors(r@1ninium of one rea 'r a Lc aIi l jaj jppTy�_ Seaondnry IndioatoM(2•or mare regulradl _ Surface Water(Al) _ WalerStafned Leaves(139)(except MLRA Water-Stained Leaves(89)(MLRA 1,2, High WaterTable(A2) 11,2,4A,and 48) 4A,and 4B) saturation(A3) _ Salt Crusi(1311) _ Drainage Patterns(810) Wote(marks(81) Aquatic Invattehrates.(B13) DrySea'son Water Table(C2) _Sediment Deposits(B2) Hydrogen Sulfide.Odor(01) _ Saturation Yrible on Aerial Imagery(C9) _ Drift Deposits(83) ._ Oxidfzed,Rhizo$pheres along living Rocils(C3):_Goomorphlc.Posiliori'(D2) _Aigal Mat or Crust(84) _ Prgpance-of Reduced fron.(C4) _ Shallow Aqu)l'ard(D3) Iron Dopnslle(135) — Recent Iron RoduclTop in`Tilled 5olip,(Cp) r--kAGNeulralTesl(PM Surface Soil Craelre'(B4) _ Sjdnted or,Stw6dbd Planti(Dt)(LRR A) _ Raised Ant MoUnds.(00)(LRR A) Inundation Visible on Aerial Imagery(87) _ Other•(EKplairt In Remarks) _ Frost-Heave Hummocks(07) _ Sparsely Vegetated Concave Surfece.(50) Field Observations: Surface Water Preyenl? Yon No X Depth(inchee): Water Table Present? Yea No 7C Depth.(inchasy saturation Present? Yos No X DoRlh#ftches): Weliand F)ydrologyPreserrt? 'Yes No x includes•ca lllo frin e' De>lcrlbo Rccorderd'Datii.(atr6ein gaUgb,tnonttofirfg v� Q;.6re71a1 pholOd..,prbVidus ini pectiona);ii avhifable: (iemarka: US Army Corps of Engineers Weptem:Mouritains,Valleys,and Qnast-Intor(m Version WETLAND DETERMINATION DATA FORIVi-Western Mountains,Valleys,and Coast Region ProjecUSile: Laurel Glen Subdivision_- Baxter cr.Cityleounty. Bozeman/Ga].lati.n _ Sampling Date;.6-24-0a ( Applicant/Owner._1.3ine©ley Developmerrt•/Charles HinesleX Slate: MT SamplingPolnt: SP-2 low terrace Inventigntor(s):j3art)ara Vaught►/J3jd, ZSrluds~f Section,Township.Range;­P3,],12 SWl/4_,_W]./2 SE1/4, Sec-a, T2S,RSE Landfonn(hdlnlope,terrace,etc.): cC.ream 1:1Zgraee Local relief(concavq,convax,none)._ Slope(%): Subregion(LRR):_ _— Lot: Long: Datum:— Soll Map Unit Noma Lamoose silt loam (537A) _ NWI classifloutiron: hydric soil Are climatic I hydrofoglc conditions on the site typical ter this Brno of year? Yes X No (It no,explain in Remarks.) Are Vegetation Sol[ ,or Hydrology significantly disturbed? Art)"Normal Circumstances"presonl? Yas X No Are Vegetation .,Soil ,or Hydrology naturally problematic? (If needed,explain any answers in Remarks:) SUMMARY OF FINDINGS- Attach site map showing sampling point locations,transects,important features,etc. Hydrophyfio Vegetation Present? Yes X No is iho Sampled Area Hydric Soil Present? Yes X No _ within a Watland? Yos X No Welland Hydrology Present? Yes X No Remarks: VEGETATION-Use scientific: names of plants. Absolute Dominant Indicator Dominance Tost workshoot: - Tree Slrnt- (Plot sirs: ) %Cover �ecies? Status Number.of Dominant Species • That Are OBL.FACW,or FAC: 4 (A) • 2. Total Number of Dominant 3. Spaces Across A11 Strata: 4 (p) Percent of Dominant Species Total Cover That Are OBL,FACW,or FAC: 100 Sapling/Shrub Sin,tum (Piet size: ) 1. sal.ix bebbiana 10 ye-- OBL Prevalence Indexworlmhoet: 2. _ Total%Cover of,• Multiply by: 3. OBI.species x 7 4. FACW species x 2- 5. FAC species x 3= 10 =Total Cover FACU species x 4- Herb Stralum (Plot slze: 15-f t r.ad UPL t. Alopecurus pratensis 45 yes 17ACW Column eta x) Column Totals: (A) (a) 2. Carex utriculata 25 yes OBL 3. Carex nebrascensis 20 yes OBL Prevalence Index =BIA= 4. Hydrophytib Vegetatfon indicators: 5. X Dominance Test is>50% G. Prevalence Index N 53.0 7. _ Morphological Adaptations'(Provide supporting o. data in Remarks or on a separate sheet) 9. Wetland Non-VascularPlanls' 10. — Problematic I-lydrophytic Vegetation'(Explain) rindicatorc of hydric soil and wolland hydrology must be present,unless disturbed or problematic, 3.00 =Total Cover Woody Vine Stralum (Plot size: ) t Hydrophytic 2 Present?Vegetation Yes X No -Total Cover %Bore Ground in Herb Stratum Remarks: US Army Corps of Engineers Woclarn Mountains,Valleys,and Coast-Interim Version SOIL Sampling Point. Sp-2 Profile Description: (Describe'to the depth needed to docuntont the Indicator or confirm the absence of indicators,) Depth Matrix Redox Features. {inchar) _ Color moist % Color moist)_ % Tyno._Lac Te t re Remarks 0 to 12 31 10 Y 10 YR 3 3 C M played ailt loam 'Type: C=Conconlration,D=Depletfon,RK1-Reduded Matrix,CS=Coverod orCoatod Sand Grains: 'Loealion: PL=Poro Lining M=Matrix. Wydrlc Soil indicatorc: (Applicablo to all LRR6,un lose othorwiso notod.) Indleatorc for Problomatle Hydric Sollc": _ Hislosol(Al) — Sandy Redox(SS) _ 2 cm Mucic(AiD) _ Histic Epipedon(A2) M Stripped Matrix(SS) _ Red Parent Material(Tl"2) _ Black Nlstic(A3) _ Loamy Mucky Mineral(F1)(Dxcopt MLRA 1) — Other(Explain In Remarks) Hydrogen Sulfide(A4) X Loamy Gleyed Matrix(172) _ Depleted Below Dark Surface(All) _ Depleted Molriz(F3) _ Thick Dark Surface(Al2) _ Redox Dark Surface(176) lndicalors of hydiophylic vegetation and _ Sandy Mucky Mineral(Si) _ Depleted bark Surface(F7) wetland hydrology must be present, _ Sandy Gleyed Matrix(34) _ Redox Depressions(F0) unless disturbed or problematic. Restriotivo Layer(If present): Type: Depth(Inches): Hydric Soil Prosont? Yoo x I& Remarks: HYDROLOGY Welland Hydrology Indicators: Prima!L L11fill Calors(mfnimun�of ono required:check a 1 111131 nppf� Secondary Indicators(2 or mere reauirod) Surface Water(Al) _ Water-Slainod Leaves(00)(except MLRA _ Water-Slained Leaves(65)(MLRA 1,2, High Water Table(A2) 1,2,4A,and 4B) 4A,and 4D) X Saturation(A3) Salt Crust(BI i.) Drainage Patterns(B10) Water M+arks(81) _ Aquatic Invertebrates(813) _ Dry-Season Water Table(C2) Sediment Deposits(02) _ Hydrogen Sulfide Oder(C1) _ Saturation Visible on Aerial Imagery(C9) Drilt Deposits(63) _ Oxidized Rhizosphcrer,along Living Roots(C3) _ Geomorphic Position(02) _ Algal Mat or Crust(B4) r Presence of Reduced Iron(C4) ` Shallow Aquitard(D3) _ Iron Depocllc(B5) _ Recent Iron Reduction in Tilled Soils(C6) _ FAC-Neutral Test(05) Surface Soil Cracks(BO) _ Stunted or Stressed Plant::(Di)(I-RR A) _ Raised Ant Mounds(DO)(LRR A) Inundation Visible on Aerial Imagery(B7) _ Other(Explain In Remarks) _ Frost-Heave Hummocks(137) _ Sparsely Vegetated Concave_Surface(138) Field Observations: Curfnoc Wotar Present? Yee No Depth(Inches); Water Table Present? Yes No Depth(inches): Saturation Present? Yes x No Depth(inches): surf a rP Wntiand Hydrology Present? Yes No (includes capillary fringe) Dencribo Recorded Data(streom gauge,monitoring well,aerial pliotos,previous Inspections),it available: Remarks: Ground saturated to surface. SP-2 51 from stream edge. Surface water in Baxter Creek approx 12 to 24 inches deep. US Army Corps o(Engloeers Western Mountains,Valleys.and Coast-Interim Version WETLAND DETERMINATION DATA FORM—Western Mountains.,Valleys,and Coast Re17ion Pro;ectiSite: Laurel Glen SubdJ.vi.E:j.on - Baxter Cr..CitylCounty: Bozeman/Gal).atin SonlptlogDate: 6-24-08 Applicnnif0vmr+.r Hinesley Development•/Charles Hinesley - State: MT Sampling Point:SP-3 2' bench BC Investigalor(s): Flarhara Vaug}h,(Hrian Gandef_r_r Section,Township,Range: B112_ S141/9, i41/2 SEE 4 Sec,4, T2S,R5E Landform(hillulope,terraw,etc.): FYSeRfi Y.P.Tr1CC Local rellef.(coneave,convox,none): Slope(°L): Subregion(LRR): Lat: Long: Datum: Soil Map Unit Namo: Lamoose silt loam (537A) NWi classification: hydric Boil Are atimolie I hydrologic conditions on the site typical for this lime of year? Yes X No (if-no;explain in Remarks.) Are Vegetation ,Soil ,or Hydrology slgniflcanlly disturbed? Are"Normal Circumstancus'present? Yes`X No Are Vegetation ,Soil ,or lydrology naturally problematic? (ifneedud;explain any unswers in Remarks,) SUMMARY OF FINDINGS— Attach site map showing sampling point locations,transects,Important features,etc. Hydrophylic Vegetation Present? Yes X No Is the Sampled Aroa Hydric Sol[Present? Yes X No within a Wetland? Yos X No Wetland Hydrology Present? Yes X No Remarks: VEGETATION—Use scientific names of plants. Absolule-Dominant Indicator Dominance Testworlwhect: Trre Slrntum (Plot::izc: ) °lo Cover Species? S a us Number.or Dominant Species 1• That Are OBL,FACW,or FAC: (A' 2• Total Number of Dominant 3• Species Across All Strata: t (U) Percent of Dominant Species SaolinnlShrub Stratum (Plot size: Total Cover That Are OBL,FACW,or FAC: 100 (AJU) ) 1. Sn1:i.x hr:bhiz 10 YeJ OBL Prevalence Indexworksheot: 2. T Totalyh GqveyoL -`Mullialy hy: 3•— ^_ OBL species x 1= 4. FACW species x 2= FAC species x 3= _ Total Cover FACU species x A= Herb Stratum (Plot size: 1.5-t t r.ad) UPL species x 5 t. Alopecurus pratensis 45 yes FACW Column Totals; (A) (f3) 2. Carex utriculata 25 yes OBL 3, Carex nebrascensis 20 yet OBL Prevalenco Index -B/A= a, Hydrophytic Vegetation indicators: 5. x Dominance Test Is>50i'° 6. _ Prevalence Index is_<3.0' 7, _ Morphploc3lcnl Adoplations'(Provide supporting lath in Remarks or on a sopomie shunt) 9 _ Welland Non-Vascular Plants' , Problematic Hydrophytic Vegetation'(Explain) lln&ators.of hydric soil and wetland hydrology must t be present.unless disturbed or problematic. 100 =Total Cover Woody Vine Stratum (Plot sire: ) 1. Hydrophytic 2 Vegetation Prer ent7 Yes }' No Total Cover %Bare Ground in lierb Stratum Remarks: US Army Corps of Engineers Western Mountains.Valleys,and Coast-interim Version SOIL Sampling Point: SP-3 Profilo Description: (Describe to the'doplh noeded to documont tiro,indicator or conflmr.the absrinco of Indicators.) Depth Malrix Redox.Fouture> ( i ches) Color(molst) % COIer(moist °; Typo Lot_ Texture Remarks 0 to G. 10 XR 211 no redox features,plaatic Gilt loam f3 to 7G 10 YR 2/1 7.0 YR 3/4 C _ M 8L` Caint, few, fine, C=Concenlration.D=Dcpfclion,RM=Reduced Matrix.CS.-Covered or Coaled Sand Grains. Location: PL=Pore Lining,M=Matdx. Hydric Soil Indicators: (Appficablo to all LRRc,unless othorwico noted.) bidleaturs for Problornatic Nydric Solid: _ Histosol(Al) _ Sandy Redox(S5) _ 2 cm Muck(A1O) _ Histic Eplpedon(A2) — Stripped Mgtrlr,(S6) — Red Parent Material(TF2) _, Black i tlsllc(A3) _, Loamy Mucky Mineral(F'1)(except MLRA'1) Other(Explain in Remarks) Hydrogen Sulfide(A4) — Loamy Gleyed Matrix(F2) Depleted Below Dark Surface(All) _ Depleted Matrix(F3) Thick Dark Surface(Al2) 3C Redox Dark Surface(F6) 'Indicators of hydrophylic vegetation arid Sandy Mucky Mineral(S1) _ Depleted Dark Surface(F7) wetland hydrology must be present, Sandy Gloyed Matrix(84) _ Redox Depresslons(FB) unless distur4ed or problematic. Restrictivo Layer(if present): Type: Depth(inches): Illydri.Soil Prosont? Yos x No Remarks: HYDROLOGY Wetland Hydrology Indicators: 'fir r ty�ndlcn�ors�mJlljrywm Qf p1)e required heci<ell thfl�opply) Secondary Indirootors(2 or mom repuirgd) _ Surface Water(A1) _ Water-Stained Leaves(89)(except MLRA _ Water-Stained Leaves(89)(MLRA 1,2, _ High Water Table(A2) 1,2,4A,and 4D) 4A,and 48) X Saturation(A3) Salt Crust(B'11) ^ Drainage Patterns(B10) Water Marks(81) ^ Aquatic Invertebrates(813) _ Dry-Season Water Table(C2) _ Sediment Deposits(132) _ Hydrogen Sulfide Odor(61) Saturation Visible on Aerial Imagery(C9) Drift Doposili (B3) W Oxidized Rhizospherea along Living Roots(C3) _ Geomorphic Position(D2) Algal Mat or Crust(84) _ Presence of Reduced Iron(C4)' _ Shallow Aquitard(D3) ~_ Iron Deposits(85) Recent Iron Reductlon in Tilled Solis(CO) _ FAC•Neutral Test(Db) Surface SDI]Cracks(B6) _ Stunted or Slrensed PkinlD(01)(LRR A) Ralsed Ant Mounds(DO)(LRR A) Inundation Visible on Aerial Imagery(07) _ Other(Explain in Rernarks) _ Frost-Heave Hummocks(D7) +_ Sparsely Vo-gotated Concave Surface(88) Field Observations: Sin rC Water Prraent? Yea No Depth(inches): Water Table Present? Yes No Depth(inches): Salumtlon Present? Yes x No Depth(Inches): 6 Wetland Hydrology Present? Yes X No includes ca ille fringe) Deacrlbe Recorded Data(stream gauge,monitoring well,aerial photos,previous inspections),U available: Remarks: Mianriel straig it 10 to 1.0 teet w cie; I to 2 toot water depEF. US Army Corps of Engineers Western Mountains,Valleys,and Coast-Interim Version WETLAND bETERMINATION DATA FORM—Western Mountains,Valleys,and Coast Region Projecusile: Laurel. Glen Subdivision - Baxter CX.City/County: Bozeman/Gallatin SamplingDatea 6-24-08 ( Applicant/Owner: Hinceley Development/Charles MaeslerL_ Stalo: MT SamplinpPolnl:SP-4;east bench BC Investlgator(c.):galzbzx,-vtughn/Rrian sanflefur Section,Township.Range: E1/2 SW1/4, W1/2 SF.1/4, Sec.4, T2S,R5>; Landform(hillalope,terrace,etc,); ;A ream t cizrace Local relief(concave,convex,none):--, Slope Subregion(LRR): Lit Long: Datum: Soil Map Unit Name: Lamoose !silt loarn (537A) NWI classificallon: hydric sail Are climatic I hydrologic conditions on the site lypleal for this[line of year? Yes X No (If no,explain in Remarks.) Are Vegetation Soil or Hydrology significantly disturbed? Aro'Nor trial Ciroumstances'prosent? Yes X No Are Vegulation Soil or I lydrology naturally problematic? (It needed;oxpinin any answers In Remarks:) SUMMARY OF FINDINGS— Attach site map showing sampling point locations,transacts,important features,etc. HyJrophyllc Vegetation Prosent? Yes, X No Is the Sampled Aroa Hydric Soil Present? Yes X No Welland Hydrology Presenl? Yes X No within a Wetland? Yes X No Rcmorks: VEGETATION—Use scientific names of plants.. Absolute Dominant Indicator Dominance Testworksheet: Tree Stratum (Plot size: __) °!°f over . rcinm? Slats. Number of Dominant Species 1. That Are OBL,FACW,or FAC: 4 (A) 2. Total Number of Dominant 3. Species Across All Strata: 4 (8) 4. Percent of Dominant Species =�IingfSitrub Slraturn (Plot size: ) Total Cover That Aro OBL,FACW,or FAC: 100 (A/B) 1. Sali.x bebbia a 10 yes OflL Prevalence Indexworksheot: 2, Ta Mullipiy hy: 3. OBL species x 1= 4, FACW specina 5, FAC species x 3= 10 =l olal Cover FACU specles x 4= Finrb Stratum (Plot size: 15-f t rkid) UPL species x 5- i. Alopecurus pratensis 7S yes FACW Column Totals: (A) (L) 2. Carex utri.culata 10 yes 011L 3, Carex nebrascensis 5 yes OBL Prevalence Index =BIA= 4 Hydrophytlr,Vegetation Indicators: 5. X Dominance Test Is--60% g, Prevalence Index is s3.0' 7, 1 _ Morphological Adaptations'(Provide supporting 8. data in Remarks or on a separate sheet) Welland Non-Vascular Plants' 0 Problematic Hydrophylic Vegetation`(Explain) 11 'indicators of hydric soli and wetland hydrology must ------ — be present.unless disturbed or problematio. 100 _Total Cover Woody Vino 5 talu , (Plot size: } 1. Hydrop)tytic Vegetation Present? Yes X No =Total Cover %Bare Ground in Herb Stratum_ Remarks: US Army Corps of Engineers Western Mountoinc,Valleys,and Coast-Interim Version SUIT. Sampling Point: SP-4 Profile Description: (Describe to the depth needed to documont tho fndicator or conflmt.the absence of indlcritoro.) Depth — Mal(x Redox Fog urea_` 1(�I l�s1__ ,_-_Color moist % _ ColorJmoistL _% Type' [ocr Tescture __ Jae �rtcs 0 to 8 10 YR 2/2 uo vwtelo,._ 10 YR 2/1 10 YR 4/1 D _ M SL faint, few, fine, 'Type: C-Concentration.D=Depletion.RM=Reduced Matrix,CS=Covered or Coated Sand Groins, 'Location: PL=Pore Lining.M=Malrix. Hydric Soil Indlcatom: (Applicable to all LRRu,unlonc othorwico nolod.) Indicators for Problomat;c Elydric Sollc': IIlstosol(Al) — Sandy Rcdox.(S5) _ 2 cm Muck(A'10) Histic Epipedon(A?.) — Stripped Matrix(SG) ` Red Parent Material(TF2) Black Histic(A3) — Loamy Mucky Mineral(F'I)(oxeopt MLRA 1) _ Other(Explain in Remarks) _ Hydrogen Sulfide(A4) Loamy Gleyed Matrix(F2) Depleted Below Dark Surface(Al 1) % Depicted Matrix(173) Thick Dark Surface(Al2) i Redox Dark Surface(176) 'Indicators of hydrophylic vegetalion and Sandy Mucky Mineral(61) Depleted Dark Surface(F7) wetland hydrology roust be present. Sandy Gleyed Matrix(S4) Redox Depressions(FO) unless disturbed or problematic. Restrictive Layer(if pre.ant): Typo: Deplh(inches): Nydrlc Soil Prosont? Yoc x No Remarks: HYDROLOGY Welland Hydrology Indicators: PrimL+ry, qn Li aipr$(minimum of one requireed;cjeck!Ir ha�ip�p�y� Seconday Indicators(2 or room regulred) �_ Surface Water(Al) _ Water-Stained Leaves(89)(except MLRA Water-Stained Leaves(B9)(MLRA 1,2, _ High WaterTable(A2) 1,2,4A,and 4D) 4A,and 4B) X Saturation(0) _ Sall Crurl(B11) _ Drainage Patterns(010) Water Marks(E7) _ Aquatic Invertebrates(B13) __ Dry-Season Water Table(C2) Sediment Deposits(82) _ Hydrogen Sulfide Odor(Cl) _ Saturation Visible on Aerial(inagery(CO) _ Drift Deposlls(53) _ Oxidized Rhizospheres along Living Roots(C3) _ Geomorphic Position(132) _Algal Mat or Crust(64) _ Presorrce of Reduced Iron(C4) _ Shallow Aquilard(133) Iron Deposits(B5) — Recent Iron Reduction in Tilled Sollw(C6) _ FAC-Neutral Teal(D5) i_ Surface Sol]Cracks(BG) _ Stunted or Stressed Plcinto(D1)(LfiR A) _ Ralsed Ant Mounds(DG)(LRR A) _ Inundation Visible on Aerial Imagery(137) _ Other(Explain in Remarks) _ Frost-Heave Hummocks(D7) — Sparsely Vegetated Concave Surface(88) Field Observations: Surfaco Wcicr Prooent? Yes Na Depth(inches): Water Table Present? Yes No Depth(Inclies): Saturation Present? Yes x No Dopfh(Inches): 10 Wotland Hydrology Present? Yes X _ No _ includes capillary fringe) Describe Recorded Data(stream gauge,monitoring well,aerial photos,previous inspections),If ilv Anblc: Remarks: North side of Glen Ellen, east: side of Baxter; floodplain bench. US Army Corps of Engineers Western Mountains,Valleys,and Coast-Interim Version l �PPcr�rz�rX � NRCS SOIL MAP AND DATA wat-er_s o f the t cs Delittiea6om.tzepart- CCrurel Gleam Suberi✓siovv j li I � � � � �.:- � . �; •, - :; ___. _. _--_. .a �, ��I ,. _- _ - �, 1 <, ._ . . . _ � ,1 � . �_ _ _ _ ;� _. - -� S:j .�I ,� �i 1�'��� I i, ;��� �)1 `I it I Map Unit Descriptlon(Brief,Generoted)—G ill atin County Area,Montana Laurel Glen Subdivision i Wilap UnK, Desch pftn (l3wief, Generraliad) The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas In the survey area.The map unit descriptions In this report, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major Kinds of soil or miscellaneous areas.A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils.On the landscape, however,the soils are natural phenomena, and they have the characteristic variability of all natural phenomena.Thus,the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, If ever, can be mapped without including areas of other taxonomic classes.Consequently,every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. The Map Unit Description (Brief, Generated)report displays a generated description of the major soils that occur in a map unit. Descriptions of non-soil (miscellaneous areas)and minor map unit components are not included, This description is generated from the underlying soil attribute data. Additional information about the map units described in this report is available in other Soil Data Mart reports,which give properties of the soils and the limitations, capabilities,and potentials for many uses.Also,the narratives that accompany the Soil Data Mart reports define some of the properties included in the map unit descriptions. Repori--Maps Unit Deser•ipVoro (Brief, Generated) Gallatin County Avea, 6Uiontasla Map Unit: 448A—Hyalite-Beaverton complex, moderately wet, 0 to 2 percent slopes Gornponem: Hyalite(70%) The 11yalite component makes up 70 percent of the map unit. Slopes are 0 to 2 percent.This component is on alluvial fans,stream terraces.The parent material consists of loamy alluvium.Depth to a root restrictive layer is greaterthan 60 inches. The natural drainage class is well drained. Water movement in the most restrictive layer is moderately high.Available water to a depth of 60 inches is low.Shrink-swell potential is low.This soil is not flooded. It is not ponded.A seasonal zone of water saturation is at 72 inches during May, June, July, August. Organic matter content in the surface horizon is about 3 percent.This component is in the R044XS354MT Shallow To Gravel(swgr) 15-19" P.z, ecological site. Nonirrigated land capability classification is 4e. Irrigated land capability classification is 3e.This soil does not rneet hydric criteria.The calcium carbonate equivalent within 40 inches,typically, does not exceed 3 percent, 05DAA Natural Resources _ Web Soil Survey 2,0 713012008 Conservation Service National Cooperative Soil Survey Page t of 6 Map unit Description(Brief,Generated)—Gallatin County Area,Montana laurel Glen Subdivision Component: Beaverton(20%) The Beaverton component snakes up 20 percent of the mop unit.Slopes are 0 to 2 percent.This component is on stream terraces, alluvial fans.The parent material consists of alluvium. Depth to a root restrictive layer is greater than 60 inches.The natural drainage class is well drained.Water movement in the most restrictive layer is moderately high.Available water to a depth of 60 inches is low. Shrink-swell potential is lour. This soil Is not flooded. It is not ponded.A seasonal zone of water saturation is at 72 inches during May, June,July,August. Organic matter content in the surface horizon is about 2 percent.This component is in the R044XS354MT Shallow To Gravel (swgr) 15-19" P.z. ecological site. Nonirrigated land capability classification is 6s. Irrigated land capability classification Is 4s.This soil does not meet hydrle criteria.The calcium carbonate equivalent within 40 inches,typically, does not exceed 10 percent. Component: Beaverton (5%) Generated brief soil descriptions are created for major components.The Beaverton soil is a minor component. Component: Meadowcreek(5%) Generated brief soil descriptions are created for major components.The Meadowcreek soil is a minor component. Map Unit: 45313—Arnsterdam-Quagle silt loams, 0 to 4 percent slopes Component: Amsterdam (60%) The Amsterdam component makes up GO percent of the map unit.Slopes are 0 to 4 percent.This component is on stream terraces.The parent material consists of loess. Depth to a root restrictive layer is greater than 60 inches.The natural drainage class is well drained.Water movement in the most restrictive layer is moderately high.Available water to a depth of 60 inches is high. Shrink-swell potential is low.This soil is not flooded. It is not ponded.There is no zone of water saturation withln a depth of 72 inches.Organic matter content in the surface horizon Is about 3 percent.This component is in the R044XS355MT Silty(si)15-19"P.z. ecological site. Nonirrigated land capability classification is 3e. Irrigated land capability classification is 3e.This soil does not meet hydric criteria.The calcium carbonate equivalent within 40 inches,typically, does not exceed 25 percent. Component: Quagle (30%) USDA Natural Resources Web Solt Survey 2.0 7130f2008 Conservation Service National cooperative Soil Survey Page 2 of 6 Map Unit Description(Brief,Generated)—Gallatin County Area,Montana Lauret Glen Subdivision The Quagle component makes up 30 percent of the map unit. Slopes are 0 to 4 percent.This component is on stream terraces.The parent material consists of silty calcareous loess, Depth to a root restrictive layer is greater than 60 inches.The natural drainage class is well drained.Water movement in tho most restrictive layer Is moderately high.Available water to a depth of 60 Inches is high. Shrink-swell potential is low.This soil is not flooded.It is not ponded_There is no zone of water saturation within a depth of 72 inches.Organic matter content in the surface horizon is about 2 percent.This component Is in the R044XS357MT Limy (ly) 15-19" P.z. ecological site. Nonirrigated land capability classification is 4e. Irrigated land capability classification is 4e.This soil does not meet hydric criteria.The calcium carbonate equivalent within 40 inches, typically, does not exceed 25 percent. Component: Beanlake(6%) Generated brief soil descriptions are created for major components.Tile Beanlake soil is a minor component. Component: Meagher(4%) Generated brief soil descriptions are created for major components.The Meagher soil is a minor component. Map Unit: 457A Turner loam, moderately wet,0 to 2 percent slopes Component: Turner(85%) The Turner component makes up 85 percent of the map unit. Slopes are 0 to 2 percent. This component Is on stream terraces.The parent material consists of alluvium. Depth to a root restrictive layer is greater than 60 inches.The natural drainage class is well drained.Water movement in the most restrictive layer is moderately high.Available water to a depth of 60 inches is low. Shrink-swell potential is low.This soil is not flooded.It Is not ponded.A seasonal zone of water saturation is at 72 inches during May, June, July,August,Organic matter content in the surface horizon is about 3 percent.This component is in the R044XS355MT Silty(sl)15-19"P.z.ecological site.Nonirrigated land capability classification is 3e. Irrigated land capability classification is 3e.This soil does not meet hydric criteria. The calcium carbonate equivalent within 40 incites,typically, does not exceed 10 percent. Component: Beaverton (5%) Generated brief soil descriptions are created for major components,The Beaverton soil is a minor component. Component: Meadowcreek(5%) Generated brief soil descriptions are created for major components.The Meadowcreek soil Is a minor component. Component: Turner(5%) USDA Natural Resources Web Sell Survey 2.0 7/30)2008 :M Conservation Service National Cooperative Sall Survey Page 3 of 6 Mop Unit Description(Brief,Generated)—Gallatin County Area,Montana Laurel Glen Subdivision I Generated brief soil descriptions are created for major components.The Turner soil is a minor component. Map Unit: 509E—Enbar loam, 0 to 4 percent slopes component: Enbar(85%) The Enbar component makes up 85 percent of the map unit. Slopes are 0 to 4 percent.`17-iis component is on flood plains.The parent material consists of loamy alluvium. Depth to a root restrictive layer is greater than 60 inches.The natural drainage class is somewhat poorly drained.Water movement in the most restrictive layer is moderately high.Available water to a depth of 60 inches is moderate. Shrink-swell potential is low.This soil Is rarely flooded.It is not ponded.A seasonal zone of water saturation is at 33 inches during April,May,June,July.Organic matter content in the surface horizon Is about 4 percent.This component is in U-ie R044XS359MT Subirrigated (sb) 15-19" P.z.ecological site.Nonirrigated land capability classification is 3w.Irrigated land capability classification is 3w.This soil does not meet hydrir,criteria.The calcium carbonate equivalent within 40 inches, typically, does not exceed 5 percent. Component: Nythar(10%) Generated brief soil descriptions are created for major components.The Nythar soil is a minor component. Component: Straw(5%) Generated brief soil descriptions arc created for major components.The Straw soil is a minor component. Map Unit: 51013—Meadowcreek loam, 0 to 4 percent slopes Component: Meadowcreek(85%) The Meadowcreek component makes up 85 percent of the map unit. Slopes are 0 to 4 percent.This component is on stream terraces.The parent material consists of alluvium. Depth to a root restrictive layer Is greater than 60 inches.The natural drainage class is somewhat poorly drained.Water movement in the most restrictive layer is moderately high.Available water to a depth of 60 inches is low.Shrink-swell potential is low.This soil is not flooded. It is not ponded.A seasonal zone of water saturation is at 33 inches during April, May, June. Organic matter content In the surface horizon is about 4 percent.This component is in the R044XS359MT Subirrigated (sb) 15-19"P.z. ecological site. Nonirrigated land capability classification is 3e. Irrigated land capability classification is 2e.This soil does not meet hydrir criteria. Component: Blossberg (10%) Generated brief soil descriptions are created for major components.The Blossberg soil is a minor component. V_aP6 Natural Resources Web Sell Survey 2.0 7/3012008 r•ri Conservation Service National Cooperative Sell Survey Page 4 of 6 Map Unit Description(brier,Generated)—Gallatin County Area,Montana Laurel Glen subdivision Component: Beaverton (5%) Generated brief soil descriptions are created far major components.The Beaverton soil is a minor component. Map Unit: 511A—Fairway silt loam, 0 to 2 percent slopes Component: Fairway (85%) The Fairway component makes up 85 percent of the map unit. Slopes are 0 to 2 percent.This component is on stream terraces.The parent material consists of loamy alluvium. Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is somewhat poorly drained. Water movement in the most restrictive layer is moderately high.Available water to a depth of 60 inches is high. Shrink-swell potential is low.This soil is not flooded. It is not ponded.A seasonal zone of water saturation is at 33 inches during April,May, June. organic matter content in the surface horizon is about 4 percent.This component is in the R044XS343MT Subirrigated (sb) 9-14"Rz, ecological site. Nonirrigated land capability classification is 4e. Irrigated land capability classification is 4e.This soil does not meet hydric criteria.The calcium carbonate equivalent within 40 inches, typically, does not exceed 10 percent. Component: Blossberg (10%) Generated brief soil descriptions are created for major components.The Blossberg soil is a minor component. Component: Meadowcreelc(5%) Generated brief soil descriptions are created for major components.The Meadowcreek soil is a minor component. Map Unit: 537A—Lamoose silt loam, 0 to 2 percent slopes Component: Lamoose (85%) The Lamoose component makes up 85 percent of the map unit. Slopes are 0 to 2 percent.This component is on stream terraces.The parent material consists of alluvium. Depth to a root restrictive layer is greater than 60 inches.The natural drainage class is poorly drained. Water movement in the most restrictive layer is moderately high.Available water to a depth of 60 inches Is low. Shrink-swell potential is low. This soil Is not flooded. It is not ponded.A seasonal zone of water saturation is at 18 inches during April, May, June, July. Organic matter content in the surface horizon is about 5 percent.This component is in the R044XS349M'i' Wet Meadow(wm) 9-14"Rz. ecological site. Nonirrigated land capability classification is 5w. This soil meets hydric criteria. Component: Bonebasin (10%) Generated brief soil descriptions are created for major components.The Bonebasin soil Is a minor component. USDA Natural Resources Web Soil Survey 2.0 7/3012008 2E!�i conservation service National cooperative Soil Survey Page 5 of 6 Map Unit Description(Brief,Generated)-Gallatin County Area,Montana Laurel Glen Subdivision Component: Meadowcreek(5%) Generated brief soil descriptions are created for major components.The Meadowcreek soil is a minor component. Map Unit: 748A—Hyalite-Beaverton complex, 0 to 4 percent slopes Component: Hyalite (70%) The Hyalite component makes up 70 percent of the map unit. Slopes are 0 to 4 percent.This component is on alluvial fans, stream terraces.The parent material consists of loamy alluvium.Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is well drained.Water movement in the most restrictive layer is moderately high.Available water to a depth of 60 inches is low.Shrink-swell potential is low.This soil is not flooded. It is not ponded.There is no zone of water saturation within a depth of 72 inches,Organic matter content in the surface horizon is about 3 percent.This component is in the R044XS354M1'Shallow To Gravel (swgr) 15-19" P.Z. ecological site. Nonirrigated land capability classification is 4e. Irrigated[arid capability classification is 3e.This soil does not meet hydric criteria. The calcium carbonate equivalent within 40 inches,typically,does not exceed 3 percent. Component: Beaverton(20%) The Beaverton component makes up 20 percent of the map unit. Slopes are 0 to 4 percent.This component is on alluvial fans, stream terraces.The parent material consists of alluvium. Depth to a root restrictive layer is greater than 60 inches.The natural drainage class is well drained.Water movement in the most restrictive layer is moderately high.Available water to a depth of 60 inches is low. Shrink-swell potential Is low.This soil is not flooded. It Is not ponded.There is no zone of water saturation within a depth of 72 inches.Organic matter content in the surface horizon is about 2 percent.This component is in the R044XS354MT Shallow To Gravel (swgr) *15-19 P.z, ecological site. Nonirrigated land capability classification is 6s. Irrigated land capability classification Is 4s.This soil does not meet hydric criteria. The calcium carbonate equivalent within 40 inches,typically, does not exceed 10 percent. Component: Hyalite (5%) Generated brief soil descriptions are created for major components.The Hyalite soil is a minor component. Component: Turner(5%) Generated brief soil descriptions are created for major components.The Turner soil is a minor component. Data SOUVG(- Infon-nation Soil Survey Area: Gallatin County Area, Montana Survey Area Data: Version 9, Feb 26, 2008 PS Natural Resources Web Soil Survey 2.0 713012008 ,t Page 6 of 6 Conservation service National Cooperative Soil Survey 9 Taxonomic Closslilcation of the Solls^-Gallatin County Area,Montana Laurel Glen Subdivision ( ��7e®iro rruuua� C.-IlassAuucattuon Of OIL- Soils The system of soil classification used by the National Cooperative Soil Survey has six categories (Soil Survey Staff, 1999 and 2003).Beginning with the broadest, these categories are the order,suborder,great group,subgroup,family,and series. Classification is based on soil properties observed in the field or inferred from those observations or from laboratory measurements.This table shows the classification of the soils in the survey area.The categories are defined in the following paragraphs. ORDER.Twelve soil orders are recognized.The differences among orders reflect the dominant soil-forming processes and the degree of soil formation. Each order is identified by a word ending in sol. An example Is Alfisols. SUBORDER. Each order Is divided into suborders primarily on the basis of properties that influence soil genesis and are important to plant growth or properties that reflect the most important variables within the orders.The last syllable in the name of a suborder indicates the order.An example is Udalfs(Ud,meaning humid, plus alfs,from Alfrsols). GREAT GROUP. Each suborder is divided into great groups on the basis of close similarities in kind, arrangement,and degree of development of pedogenic horizons; soil moisture and temperature regimes;type of saturation; and base status.Each great group is identified by the name of a suborder and by a prefix that indicates a property of the soil. An example is Hapludalfs(Hapl,meaning minimal horizonalion, plus udalfs,the suborder of the Alfrsols that has a udic moisture regime). SUBGROUP. Each great group has a typic subgroup. Other subgroups are intergrades or extragrades.The typic subgroup is the central concept of the great group;it is riot necessarily the most extensive. Intergrades are transitions to other orders,suborders,or great groups.Extragrades have some properties that are not representative of the great group but do not Indicate transitions to any other taxonomic class. Each subgroup is identified by one or more adjectives preceding the naive of the:great group.The adjective Typic identifies the subgroup thattypifies the great group.An example is Typic Hapludalfs. FAMILY. Families are established within a subgroup on the basis of physical and chemical properties and other characteristics that affect management. Generally, the properties are those of horizons below plow depth where there is much biological activity.Among the properties and characteristics considered are particle-size class, mineralogy class,cation-exchange activity class,soil temperature regime, soil depth, and reaction class.A family name consists of the name of a subgroup preceded by terms that indicate soil properties.An example is fine-loamy, mixed, active, mesic Typic Hapludalfs. SERIES.The series consists of soils within a family that have horizons similar in color,texture,structure,reaction, consistence, mineral and chemical composition, and arrangement in the profile. UUSDA_ Natural Resources Web Soil Survey 2,0 7130i2008 Z' Conservation Service National Cooperative Soil Survey Page 1 of 2 Taxonomic Classification of the Soils—Gallatin County Area,Montana Laurel Glen Subdivision References: Soil Survey Staff. 1999.Soil taxonomy:A basic system of soil Classlficati011 for making and interpreting soil surveys.2nd edition.Natural Resources Conservation Service. U.S. Department of Agriculture Handbook 436. Soil Survey Staff.2003. Keys to soil taxonomy.9th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. (The soils in a given survey area may have been classified according to earlier editions of this publication.) Repod-t—Taxonomic Classification of the Soils [An asterisk by the soil name indicates a taxadjunct to the series] Taxonomic Classification of tiro Soils—Gallatin County Area,Montana Soil name Family or higimi taxonomic classinention Amsterdam Fine-silly,mixed,superactive,frigid Typic Haplustolls Beaverton Loamy-skolelal over sandy or sandy-skeletal,mixed,superactive,frigid TyplcArgiustolls Enbar Fine-loamy,mixed,superactive,frigid Cumulle Haplustolis Fairway rF�lne-loamy,mixed,superactive,rrigid Fluvaquenlic Haplustolls Nyallte loamy,mixed,superactive,frigid Typic Argiustolls Lamoose loamy over sandy ersandy-skeletal,mixed,superactive,calcareous,frigid Typic doaqualls Meadowcreek _ Flne-loamy over sandy or sandy-skeletal,mixed,superactive,frigid Fluvaquentic Haplustolls Qungle Coarse-silly,mixed,superactive,frigid Typic Calcluslolls Turner Fine-loamy over sandy or sandy-skeletal,mixed,superaclive,frigid Typic Argirrstolls Data Source Information Soil Survey Area: Gallatin County Area, Montana Survey Area Data: Version 9, Feb 26, 2008 U Natural Resources Web Soil Survey 2.0 7/30/2008 Conservation Service National Cooperative Soil Survey Pago 2 of 2 Hydric Soils-Gallatin County Area,Montana Laurel Glen SubdivIslon 1 Hydric dric Slo ks This table lists the map unit components that are rated as hydric soils In the survey area. This list can help in planning land uses;however, onsite investigation is recommended to determine the hydric soils on a specific site(National Research Council, 1995; Hurt and others, 2002). The three essential characteristics of wetlands are hydrophytic vegetation, hydric soils, and wetland hydrology(Cowardin smd others, 1979; U.S.Army Corps of Engineers, 198 7; National Research Council, 1995;Tiner, 1985). Criteria for all of the characteristics must be met for areas to be identified as wetlands. Undrained hydric soils that have natural vegetation should support a dominant population of ecological wetland plant species. Hydric soils that have been converted to other uses should be capable of being restored to wetlands. Hydric soils are defined by the National Technical Committee for Hydric Soils (NTCHS) as soils that formed under conditions of saturation,flooding, or ponding long enough during the growing season to develop anaerobic conditions in the Lipper part (Federal Register, 1994).These soils, under natural conditions, are either saturated or inundated long enough during the growing season to support the growth and reproduction of hydrophytic vegetation. The NTCHS definition Identifies general soil properties that are associated with wetness. In order to determine whether a specific soil is a hydric soil or nonhydric soil, however, more specific information, such as information about the depth and duration of the water table, is needed.Thus,criteria that identify those estimated soil properties unique to hydric soils have been established (Federal Register, 2002).These criteria are used to identify map unit components that normally are associated with wetlands.The criteria used are selected estimated soil properties that are described in"Soil Taxonomy"(Soil Survey Staff, 1999)and "Keys to Soil Taxonomy" (Sol[Survey Staff, 2006)and in the"Soil Survey Manual' (Soil Survey Division Staff, 1993). If soils are wet enough for a long enough period of time to be considered hydric, they should exhibit certain properties that can be easily observed in the field.These visible properties are indicators of hydric soils.The Indicators used to make onsite determinations of hydric soils are specified in"Field Indicators of Hydric Soils in the United Slates" (Hurt and Vasilas,2.006). Flydric soils are identified by examining and describing the soil to a depth of about 20 inches. This depth may be greater if determination of an appropriate indicator so requires. It is always recommended that soils be excavated and described to the depth necessary for an understanding of the redoximorphic processes.Then, using the completed soil descriptions,soil scientists can compare the soil features required by each indicator and specify which indicators have been matched with the conditions observed in the soil.The soil can be identified as a hydric soil if at least one of the approved indicators is present. Map units that are dominantly made up of hydric soils may have small areas, or inclusions,of nonhydric soils in the higher positions on the landform,and map units dominantly made up or nonhydric soils may have inclusions of hydric soils in the lower positions on the landform. The criteria for hydric soils are represented by codes in the table(for example,2133). Definitions for the codes are as follows: USDA Natural Resources Web Sall Survey 2.0 71=2008 '-'r conservation Service National Cooperative Soil Survey Page 1 of 2 hlydric Soils—Gallatin County Area,Montana Laurel Glen Subdivision 1 References: Cowardin, L.M.,V. Caper,F.C.Golet,and E.T. LaRoe. 1979. Classification of wetlands and deep-wator habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. September 16,2002. Hydric soils of the United States. Federal Register. July '13, 1994. Changes in hydric soils of the United States. Hurt, G.W., and L.M.Vasilas, editors.Version 6.0,2006.Field indicators of hydric soils in the United States. National Research Council. 1995.Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U-S. Department of Agriculture Handbook 18. Soil Survey Staff. 2006. Keys to soil taxonomy. 10th edition.U,S. Department of Agriculture, Natural Resources Conservation Service, Soil Survey Staff. 1999. Soil taxonomy:A basic system of soil classification for snaking and interpreting soil surveys.2nd edition.Natural Resources Conservation Service. U.S. Department of Agriculture Handbook 436. Tiner, R.W., Jr. 1985.Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control,Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987.Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. Report—Hydric Soft Hydric Soils-Gnllatin County Area,Montana Map symbol and map unit name cornponont Percent of Landform Hydric ' ' , map uult criteria 509B--Enbar loam,0 to 4 percent slopes _ Nylhar 10 Flood plains 2133 510B—Moadowcroolc loam,o to 4 percent slopes Blossberg 10 Terraces 2[33 511A—Fairway sill loam,0 to 2 percent slopes _ Blossberg 10 Terraces 2B3 537A—Lamoose silt loam,0 to 2 percent slopes Lamoose eG stream terraces 2133 -77 Bonebasln 10'Tcrioces 2B3;3 Data Source InfonyBation Soil Survey Area: Gallatin County Area, Montana Survey Area Data: Version 9, Feb 26, 2008 USDA Natural Resources web Soil Survey 2.0 713012008 Conservation Service National Cooperative Soil Survey Page 2 of 2 l AppF/I/D/X c MRCS CUMAT�5 DATA waters of the us nelineatiopz-Report- !_.aurel c7len�.stcbdi✓isiow FROST Station : BOZEMAN MONTANA ST UN1V, MT1044 Page 1 of -tart yr. - 1961 End yr. - 1990 tested years of, data: 30 Available years of data: 30 .ing: •ars of missing data 24 deg = 0, 28 deg - 0, 32 deg = 0 :ars w-th no occurrence 24 deg = 0, 28 deg 0, 32 deg - 0 Data years used 24 deg = 30, 28 deg = 30, 32 deg = 30 Fall.. Years of missing data 24 deg = 0, 28 deg = 0, 32 deg = 0 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg - 30, 2B deg = 30, 32 deg = 30 ----------------------- I Temperature --------------------------- I-------------------------------------------- --Probability 124E or lower 128E or lower 132E or lower ---------------------- I--------------I ------------- I-------------- I I Last freezing temperature I I I in spring: I I I I I I 1 year in 10 later than-- I May 10 1 May 18 I June 3.3 I I I 2 year in 10 late.r. than-- I May 5 1 May 13 I June 7 1 I I 5 year. in 10 later than-- I April 24 1 May 4 I May 27 I I I First freezing temperature I I in fall: I I I I I 1 1 yr in 10 earlier than-- ISeptember 24 ISeptember 14 ISeptember 2 1 1 1 yr in 10 earlier than-- ISeptember 30 ISeptember 20 ISeptember 7 I I I 5 yr in 10 earlier than-- I October 11 1 October 2 ISeptember. 18 I I I ------------------------------------------------------------------------ FROST Station : BOZEMAN 6 W EX? FARM, MT1047 Start yr. - 1967 End yr. - 1990 Requested years of data: 24 Available years of data: 24 Spring: Years of missing data 24 deg = 1, 28 deg = 0, 32 deg = 0 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 23, 2B deg = 24, 32 deg = 24 Fall: Years of missing data 24 deg = 0, 2.B deg = 0, 32 deg = 0 Years with no occurrence 24 deg = 0, 28 deg - 0, 32 deg = 0 Data years used 24 deg = 24, 28 deg = 24, 32 (leg 24 ------------------------ I Temperature -----------_---------------- I------------------------------ --------------- Probability 124E or lower 128E or lower 132E or lower I -------------------------- i-------------- Last freezing temperature I I I in spring: I 1 1 I 1 year in 10 later than— I May 10 1 May 25 I June 25 1 I I year in 10 Later than-- I May 6 1 May 19 I June 18 I I 5 year in 10 later than-- I April 27 1 May 8 I June 5 1 1 1 flp://ftp.Wcc.nres.usda.gov/stippol-t/climate/irost/mU30031.txt 10/190nnn Page 2 of First freezing temperature I I I in fall: I I I 1 I I 1 yr in 10 earlier than-- ►September 1.7 ISeptember 8 ISeptember 2 I I 2 yr in 10 earli.er. than-- ISeptember 23 ISeptember 13 ISept•ember 6 1 1 1 5 yr in 1.0 earlier than-- I October 5 ISeptember. 23 ISeptember 13 1 1 I ------------------------------------------------------------------------- ftp://ttp.wec.nres.usda.gov/support/climate/frost/mt/30031.txt 10/12/200E l P fOTO LOCI waters a(the Report- uru,el Clew 5"bd!visiam. 1 r C 1 , IIi Photo 1.0 Photo is of amended soil from SP-1 located 25 feet from channel edge. +fit" 1' 1 - 1 1l,rA, Is •, is ;"> s Photo 2,0 Photo is of steep bank adjacent to Baxter Creek and near SP-1. c r i r, TO 4. �rI 1 �� �•� � �., �: � --.i,.' ,i, - ,,fir(' � 1;1;�` +�,; go .. , T - Y4 kv - Photo 3.0 Photo is looking toward Baxter Creek at SP-2. Note gleyed soil color. WW y 11 r r 4- 4L•y�ti 7i:.t � 1 his f t �� �� �;'�y I . t 1 } ►4 s''` ,��1 r�.,; , r�t +i jl 1 i� ,� � ,f,`••.t�,+ Lt''� - / f Photo I Picture is • p located ••• 1eastof Baxter n � Photo 6.0 View-is looking southwest toward Annie Street. Flags mark wetland boundary east of Baxter Creek, 1• J r �. T EXI ftlMT A Waters o fthe us peUkLeatio"P-eport- Laurel glen Subdivision WETLANDS IMPACT SUMMARY LOCATED IN THE S 112 OF SECTION 4, T. 2 S., R. 5 E. OF P.Af,ff., CITY OF BOZEMAN, GALLATIN COUNTY, MONTANA ' Fd. 11F fN F;,ca � 1' �� �.n set •� �','. z Kr..r.,u son 1-•i LEQEKO E)OSIVIO WEnA4D DOUNDIRI r ERISTIRO MnOATED)TCTIAN00 '�•^�., ' �.'. , r PROPOSED WMAHO DISTURBANCE - C= PROP05m DETUIION POND / M i Y _.,-.p,.r•�..y_�. y.. L ' ; _ y-- PROPOSED TRNL riS �I-� � PROPOSED 54'v00' RCP CUWEI)T L----- -_-__ WF 6 TnNran rtir - y - -� •�?.�9�, i'S0anr; �� , 4:r:r �r - -- -- - _ u �R4 zcaorw am FrY M MM $ KWARY OF PROPOSED WMAND JAB 076 WMVIO zACr f1 » 17,70a 5Q Fr. 0.40a,1/CRE3 WLnAW IMPACT 2 - 0,452 SO FT- 0.1941 A01ES WETLMD UtPACT W �13 b 7.75]50 IT 0,1EE2 ACRES WETID iMPACr JJ4 7."',50 Fr 0.)C52":RES WEILWD 114PACT ,i5 973 SO FT 0.0214 AMU w^^•ro«+,w`•+w M^• TOM.PAPACT AREA 37.942 SO FT-0.0712 AMES �y Pr•tr..V4TN r...•»...•... AL 10 E n v i r o n r-n e n t a l Services 8353 Saddle D'lountain Road -Bozeman,Montana 59715 Plione:406-586.6909-bvanghn@montana.com Attn: Allan Steinle US Army Corps of Engineers Helena Regulatory Office 10 West 15f' Street, Suite 2200 Helena,Montana 59626 RE: 404 Permit Application tror Phases 3 and 4,Laurel Glen Subdivision,First Permit No. Corps File No.2001-90-847 November 18,2008 Dear Allan: The first delineation for the Laurel Glen Subdivision located in Bozernan, Montana, was completed in November 200I. US Army Corps of Engineers(USACL) Permit 2001-90-847 was approved on October 15, 2002, and expired on October 15, 2007. Phases 1 through 4 of the subdivision encompass 157 acres located in the Fast ' of the SW V4 and the West '/2 of the Southeast V%of Section 4,Township 2 South and Range 5 East,Gallatin County(see Figure 2.0 in tine delineation report). Phases 3 and <I of the subdivision encompassing Baxter Creek and Baxter Ditch (Wetlands Impact Summary, Laurel Glen Subdivision, Phases 3 and 4, Sheet I-of 6) were never developed. Hinesley Development is submitting a preliminary plat application to ale City of Bozeman for the final development phases in December 2008. Over five years have elapsed since the initial delineation. The wetiand boundaries associated with Baxter Creek were rc- delineated on June 24, 2008. The 2008 Waters of the US Delineation Report, 404 permit application form, and Mitigation Plan are included with this submittal. The following information was outlined in an email sent to Jean Ramer, the previous Army Corps agent for this project, from Barbara Vaughn on November 15, 2007. Tile original permit allowed for 4.08 acres of impact. The extent of impacts completed at the time of the permit expiration was 2.24 acres. The total mitigation credits accrued at the time of the permit expiration was 3.05 acres leaving a mitigation credit of 0.81 acres. The mitigation credit assumed a 1:1 ratio for creation of a viable wetiand (0.9 and 0.86 acre floodplain wetlands on Baxter Creek) completed prior to Phases 3 and 4 construction activities. Jean Ramer was contacted via email on October 17, 2008,to determine whether the excess mitigation credit could be applied to the new permit. She stated that the mitigation credit could be applied to the new 4.04 permit. provided that tyre mitigation wetlands meet the required success criteria within the three year monitoring period. The extent of proposed impacts to jurisdictional waters of the US totals 0.87 acres for culvert installations associated with road development in Phases 3 and 4, The remaining wetiand impacts for the 2008 404 permit application totaling 0.06 acres(0.87 less 0.81)would be mitigated for by enhancing the Baxter Creel: and Baxter Ditch corridors through the installation of containerized native trees and shrubs. Enhancement of 5.4 acres of wetlands associated with the Baxter Creek corridor at a 4:1 ratio would yield 1.35 acres of credit. Enhancement of 0.1'7 acres of the Baxter Ditch wetland corridor would provide 0.043 acres of credit at a 4:l ratio. The City of Bozeman requires a 50-foot setback from the edge of perennial streams and the associated wetland fringe, which will create a water quality buffer. A public trail will be built at the outer edge of the 50 foot watercourse setback. Mitigation details including the ratios used to calculate mitigation requirements are listed in Table 1.0 of the Mitigation Flan. Infrastructure construction is anticipated in 2009 or 2010 dependent on the preliminary plat approval, USACE, permit approval, and the economy. If you require further information ar have questions,please call my office at(406) 586-6909 or contact me at bvau na,montanaxom. Sincerely, Barbara Vaughn Environmental Engineer, M Cc: Cliarles Hinesley Enclosures: October 11,2008 Waters of the US Delineation Report 310/404 Permit Application Form Mitigation Ilan Application Revised: 09/24/03 AGENCY USE ONLY: Application It Date Received Forni may be downloaded from: Date Accepted Date Forwarded to DFWP •�ww.dnrestato.nU.us/permit.html JOINT APPLICATION FOR PROPOSED WORK IN MONNTANA'S STREAMS, 'WETLANDS, i. F'LOODPLAINS,AND OTkIER WATER BODIES Use this form to apply for oac or all of the local,state,or federal permits listed below. The insert titled"Information to Applicant"includes agency contact infonnation and instructions on how to complete this application. After completing the form, make the required number of copies and sign each copy. Send the copies,with original signatures and additional information required,directly to each applicable agency. To expedite your application, be sure all required infonnation,including,a project site map and drawings are included. Incomplete applications will be rejected. Note: other laws may apply. It is your responsibility to obtain all permits and landowner permission,if applicable,before beginning work. 1<'ERMIT AGENCY FEE 310 Permit Local Conservation District No Fee SPA 124 Permit Department of Fish, Wildlife and Parks No Fee Floodplain Permit County Floodplain Administrator Varies($25-$400) X Section 404 Peintit,Section 10 Permit U. S.Army Corps of Engineers Varies($0-$100) 318 Authorization Department of Environmental Quality $150 Navigable Rivers Land Use Liccnse or Easement Department of Natural Resources and Conservation License$25;basement$50 A. APPLICANT INFORMATION NAME OF LANDOWNER at project location:_ llinesley Development Mailing Address: 3663 Durston Road Day Phone: 406) 582-9025 Physical Address: _(same) Evening Phone: _(406) 595-1026 city/State/'Lip: Bozeman, MT 59718 NAME, OF APPLICANT (if different from landowner): _Vaughn Environmental Services Applicant is: o Landowner o Contractor ❑ Other(explain) ❑ Government Agency X Landowner's Agent (title) Has the landowner consented to this project? X Yes o No Mailing Address: _8353 Saddle Mountain Road Day Phone:_(406)586-6909 Physical Address:_(same) Evening phone: B406) 581-0655 City/State/Zip: _Bozeman, MT 59715 B. PROJECT SITE INFORMATION NAME OF STREAM or WATER BODY at project location_Baxter Creek and UT of Baxter Creek(Baxter Ditch)_ _ Nearest Town_Bozeman Ad d/ress/Location: Geocode (if available): E �/2 SW r/4 W t/2 SE, '/a , Section_4 , Township_2S ,Range_SE County_Gallatin Longitude , Latitude (if available) ATTACH A MAP OR A SK-ETCH, of the project site that includes: 1)the water body where the project will take place, roads,tributaries, landmarks; 2) directions to the site;3) a circled "X" representing the exact project location. See Figures 1.0 and 2.0 Fleis s)zrrci�is for'u/!Dcpor/nrrrrl of'Trarra7un•lrrtionar?rt S!'/I 12�/reruula'(�oVi-rnrn�ut projeCt�).. - Control Number.: T_. �__ �_ C;untroct Ictno'". dntu MEf'AINBPA•Uoni liana ,CLaI'es LJ No �- — j ',r, IAaY-,1' s1 i -_'� J �. , y ,. 1 rig r Ef �•t'E' :�i n C. PROJECT INFORMATION ' . In addition to the information requested below, a PLAN OR DRAWING of the proposed project MUST be attached. This plan or drawing must include: 1)a plan view(looking at.the project from above;2)an elevation view (looking at the project from either the right or left; 3)dimensions of the project;4)dimensions and location of fill or excavation sites; 5) location of storage or stockpile nratetials; 6)location of existing or proposed structures, such as buildings,utilities,roads, or bridges; 7) drainage facilities; 8)an arrow indicating north. Floodplain permit applicants are encouraged to inquire locally since additional information is usually required. 2. TYPE OF PROJECT (clrecic all that apply) X 1. Stream Crossing(bridges,culverts,fords) ❑ 9. Fish Habitat ❑ 17.Mining ❑ 2.Bridge/Culvert Removal ❑ 10.Recreation(docks,marinas,etc.) ❑ 18.Dredging X 3.Road Construction/Maintenance ❑ 11.New Residential Structure ❑ 19.Core Drill ❑ 4.Bank Stabilization ❑ 12.Manufactured Home X 20.Placement of Fill ❑ 5.Flood Protection ❑ 13.Improvement:to Existing Structure ❑21.Diversion Dam ❑ 6.Channel Alteration ❑ 14. Commercial Structure ❑ 72.Utilities 7.Irrigation Structure ❑ 15, Wetland Alteration ❑ 23.Pond ❑ 8. Water WellICistern ❑ 16.Temporary Construction Access ❑ 24. Other 3. WHAT IS THE PURPOSE of the proposed project? The original delineation for the Laurel Glen Subdivision was completed in November 2001. US Army Corps of Engineers (USACE) Permit 2001-90-847 was approved on October 15, 2002, and expired on October 15,2007. Phases Sand 4 of the subdivision encompassing Baxter Creek and Baxter Ditch (Figure 2.0) were never developed. Hincsley Development will submit a preliminary plat application to the City of Bozeman for the final development phases in Deccniber 2008. Over five years have elapsed since the initial delineation. The wetland boundaries associated with Baxter Creek and Baxter Ditch were re-delineated on June 24,2008. The entire subdivision encompasses 157 acres. Four 14-inch by 88-inch and one 36-inch by 58.5-inch reinforced concrete pipe(RCP) culverts will be installed across Baxter Creek and Baxter Ditch, respectively, as part of the subdivision road development. The impacts are described on Sheets 1 through 6 enclosed with this submittal. 4. IS THIS APPLICATION FOR an annual maintenance permit? Cl Yes X No (If yes, an annual plan of operation must be attached to this application-see"Information for Applicant") 5. PROPOSED CONSTRUCTION DATE: Start_3_/ /2009 Finish-12 / /_2012 Is any portion of the work already completed? X Yes--If yes,describe the completed work. ❑No 'there is a temporary culvert across Baxter Creek for Sherwood Way that will be replaced with a permanent culvert. 6. DIMENSIONS OF THE PROJECT. Describe the impacted area. How many linear feet of bank will be impacted? I•low far will the proposed project extend into and away from the water body? Impact#1 -Glenwood Drive: 108 feet of Baxter Creek Impact#2 Annie Street: 141 feet of Baxter Creek Impact#5 Oak Street: 84 feet of Baxter Ditch Impact#3 Sherwood Way: 90 feet of Baxter Creek Impact#4 Oak Street: 84 feet of Baxter Creek 7. VEGETATION. Describe the vegetation at the site. What type and how much vegetation will be removed or covered with fill material? How will the disturbed area be revegetated? The upland bench adjacent to Baxter Creek is dominated by meadow foxtail(Alopecurus pratensis-FACW). Secondary upland species include smooth brome(Bratttts inermis-NL),Kentucky bluegrass(Poa pratensis-FACU4-), musk thistle(Carduus ntttans-NL), common dandelion(Toraxacttm offleirtale-NL),and wild mustard(Br•assica kaber -NL). The wetland vegetation is dominated by meadow foxtail,beaked sedge (Carex tttrict(lato-OBL),and Nebraska sedge(Carex nebrascensis-OBL). Isolated clusters of Bebb willow(Salix bebbiano-FACW)and thin-leaf alder(,41nus tenitifolia-FACW) line the streambanks. MATERIALS. Describe the materials to be used and how much (cubic yards,luicar feet,size,type,source of each). The crossings on Baxter Creels will be constructed with 54"by 98" RCP culverts. The crossing on tjaxter Ditch will use a 36" by 58.5"pipe. The Fill will be comprised of washed rock, 6-inch minus pit run backfill and road sub-base, I-inch minus road base, and three incites of asphalt. Glenwood Drive: 1,400 cubic yards(cy) of fill Annie Street: 1,040 cy Sherwood Way: 620 cy Oak Street: 840 cy Oak Street— Baxter Ditch: 100 cy 9. EQUIPMENT. What equipment will be used for the proposed work? Trackhoe, grader, dump truck, front-end loader. 10. WITAT STEPS WILL BE TAKEN DUIUNG AND AFTER CONSTRUCTION TO MINIMIZE: U Erosion,sedimentation, or turbidity? The culverts will be installed during low flows. Silt fence will be placed parallel to the stream to prevent sediment from entering the stream. The streambanks will be revegetated with sod mats or seed mix as soon as possible after construction. The streamflow will be diverted to an alternate channel or contained behind a coffer dam and piped to the downgradient reach during construction dependent on flow levels. m Stream channel alterations? 'The Bozeman street grid dictated the ROW for the roads. The culvert inlets and outlets will be flared ends. Rock will be used at the edge of the culvert to prevent erosion. The culvert inlets and outlets will be constructed to minimize sharp bends in the charuiel alignment. Effects of stream flow or water quality caused by materials used or removal of ground cover? The culverts were designed for the 100-year flow event. Impacts to water quality will be short-term occurring only during construction. Disturbed areas will be revegetated as soon as possible following construction. Silt fence will be used to prevent sediment from discharging to the stream. Effects on fish and aquatic habitat? The construction will take place after peak flows in spring. The culvert will be installed 6 to 8 inches below grade. Streambed material the same diameter as the existing streambed will be placed within the culvert to the same width as the existing channel. e Risks of flooding or erosion problems upstream and downstream? The culvert was designed for the 100-year event. There will be no increased risk of flooding. Silt fence will be used to limit erosion. The banks will be seeded or covered with sod as soon as possible following construction. D. ADDITIONAL INFORIAAITION FOR SECTION 404, SECTION 10,AND F'LOODPLAIN PERMITS If you are applying for a Section 404 or Section 10 permit,fill out questions 14. If you are applying for a Floodplain Permit,fill out questions 4-6. (Question 4 is required for Section 404,Section 10,and Iloodplaiii permits.) l. Will the project involve placement of fill material in a wetland? If yes,describe. How much wetland area will be filled? Calculation the impacted area. Note: A delineation of the wetland may be required. See Waters of the US Delineation Report for Laurel Glen Subdivision for-Phases 3 and 4, October 11, '008, enclosed with this submittal. c. List the navies and address of landowners adjacent to and across from the project site. (At its discretion,the pennitting agency may contact these landowners.) See attached Iist. 3. If there is a plan for compensatory mitigation,describe the location,nature, and amount of proposed mitigation on an attached sheet. See enclosed November 18,2008, Mitigation Plan for Laurel Glen Subdivision. 4. If you have already applied for any permits, list them and indicate whether they were issued,denied, or are pending. (Required for Section 404, Section 10, and Floodplain Permits.) USACE Permit 2001-90-847 was approved on October 15,2002,and expired on October 15,2007. 5. FEMA Map Number(if available) 6. Does this project comply with local planning or zoning regulations? X Yes ❑No E. SIGNATUIRES/AUTHORIZATIONS Each copy submitted to an agency inust have original signature(s). t certify that the about statements are true and correct. I fitrther certify that l possess ttic authority to undertake the work ,,cscribed herein or atn acting as the duly authorized agent of the landowner. t authorize the inspection of the project site by ins cction authorities. Both he landowner and the person doing the work have the duty to comp y wilt the st'pt1 `llions ofp fit'• and law. . d r; -';Signature of Landowner Date gnatuie of App scant Date I'(May be waived by agency j •utilities and other easement holders) For Section 404/Section 10 applications,see signature Requirements for US Army Corps of Engincors in the"Guidelines For Completing Application:' / -lC_ /��XL Contractor/Agent Date DISPUTE RESOLUTION—31.0 PERMIT APPLICANTS ONLY As the applicant,if you disagree with the conservation district's decision on this application and wish to seek formal resolution,you may ask for a judicial review by filing n petition in district court or you may request a revicw by a three-member arbitration panel. 1'oa are not required to make lite choice between judicial review and arbitration unless you disagree with the conservation district's final action on this application and want to take formal action. The conservation district will provide you with information about resolving disputes when the 310 permit is issued. However,you may choose arbitration when you file this application or wait until you receive the permit decision. By choosing arbitration at the time of filing this application,you waive your right to have the final decision reviewed by district court. tf yuu wish to elect arbitration,please chcelc the box. Ifyou wish to decide later and retain your right for judicial review,do not check this box. 1 agree to arbitration as the exclusive means of review of a conservation district's decision on a 310 permit. 1 elect to sign an arbitration agreement as part of this application process and request a copy of the agreement. (Initial) MlTh: iAT701,1 PLAN L.A-I��'_EL �yLE•NS�t�D/VlSION Z�OZEMAN, MONT.4NA Noi/emberi3 2008 I • , t w i prepared for.• wepared by: 1-71 vmesley neveloprite�-t t l: r. n1 Environmental services 8353 Saddle Mounlain Road�Bozeman,Montana SWIS TABLE OF COhITENTS SECTION PAGE 1.0 MITIGATION PLAN............................................................................................................1 2.0 MIT16iATION WOT2IG PLAN.................................I...................................... S.0 REVEGjETAT1ON IMPLEMENTATION................................................................................J° 4.0 MONITORINCj PL-AN......................................................................................., .........,........12 T'AL'-LE:L.D M%ttgatLow Detalls..........................................................................................................6 TABLE 2.0 PLawt%v q T'nLcli.we Seclicewce............................................................... .............,,.,,,.,, .J° SFtEET-1 OF 0- wetlawds IjM.pact Suvu.vu Ya - Laurel e,lew.subd%vtslowPhases awd SFtEET 2 OF Co - IMpaet#7 SI-rEET s OF 6- Iv"pact#2 SHEET 4 OF 6- IvupAct#3 SHEETS OF 6 - Ivvtpaot#4 SH GET 6 OF 6 - Ivwpaet#.5 APPENDIX A-,Species Lists awd Seep M%Xes mtelafatlox Plan- Laurel:,lest 1 3.0 MITIGATION PLAN 1.1 PRO.➢-4±:C'L�'BACKGROUND The first delineation for the Laurel Glen Subdivision was completed in November 2001. US Army Corps of Engineers (USACE) Permit 2001-90-847 was approved on October 15,2002, and expired on October 15, 2007. Phases 1 through 4 of the subdivision encompass 157 acres located in the East '/z of the SW '/4 and the West '/a of the Southeast '/4 of Section 4, Township 2 South and Range 5 East, Gallatin County (Figure 1). Durston Road parallels the south property boundary. The east property boundary lies 0.25 miles west of Cottonwood Road and the west property boundary lies 0.25 miles east of Gooch Hill Road. Phases 3 and 4 of the subdivision encompassing Baxter Creek and Baxter Ditch were never developed (Wetlands Impact Swnmary, Laurel Glen Subdivision, Phases 3 and 4, Sheet 1 of 6). Hinesley Development is submitting a preliminary plat application to the City of Bozeman for the final development phases in December 2008. Over five years have elapsed since the initial delineation. The wetland boundaries associated with Baxter Creek and Baxter Ditch were re-delineated on June 24, 2008. Annual field investigations conducted after 2001 indicated that the boundaries of the broad riverine fringe associated with Baxter Creek had decreased as a result of the change in land use from flood irrigated pasture to residential. This was confirmed by the 2008 del ineation results(Sheet 1). 1.2 MITIGATION GOALS AND OBJECTIVES Impact Sites Three perennial waterways traverse the property; Baxter Creek, Baxter Ditch, and an unnamed tributary to Aaiker Creek. Baxter Creek originates from the Farmer's Canal south of US 191 and traverses the east half of the project site from the south to north property boundaries. Baxter Ditch, also known as an umiamed tributary to Baxter Creek, was originally diverted from the Maynard-Border Ditch located south of the project. The segment of Baxter Ditch from West Babcock Road to Durston Road was relocated to the west side of Cottonwood Road in 1998 as part of a mitigation project for an adjacent development. Once it crosses Durston Road,the ditch flows north through the adjacent landowner's property until it enters and exits through the northeast corner of Laurel Glen. The confluence of Baxter Ditch and Baxter Creek is approximately 1.5 miles north of the project site. An unnamed tributary to Aajker Creek flows through the southwest corner of the property, joining Aaiker Creek midway along the west boundary. Impacts to the tributary of Aajker Creek were addressed in the 2002 404 permit. Development of Phases 3 and 4 will require the installation of four culverts across Baxter Creek and one culvert across Baxter Ditch. These culvert crossings were included on the original permit. There is an existing temporary culvert at the Sherwood Way crossing,that will be replaced with a permanent concrete culvert. The total impact from the installation of the culverts is 0.87 acres (Sheet 1 of 6 — Wetland Impact Summary). Construction details at each street crossing are included on Sheets 2 through 6. N itiaation Sites Laurel Glen Subdivision lies within the growth corridor defined in the 2001 Bozeman Master Plan. The historical land use was agricultural, primarily crop production and livestock pasture. One of the long-range goals of the project was to restore water quality and fish habitat conditions in the unnamed tributary of Aajker Creek and Baxter Creek. Mitigation for the ti01690riom Plate-- Laurel 4-11n Stebdlvisiov� 2 original permit included reestablishing 1850 feet of the Aajker Creek tributary, which was completed in summer and fall 2005. The restoration encompassed reconstruction of the floodway and base flow channels and construction of pools, riffles, and meanders. The stream corridor was further enhanced with the installation of native trees and shrubs. The reach of Baxter Creek north of Durston Road historically encompassed an on-stream reservoir. The weir was removed in 2002 allowing the channel to reestablish itself. The dam and culvert were removed in 2007 and the impacted channel reach restored. Mitigation for the original permit also included the creation of a 0.9 acre wetland complex north of Durston Road and a 0.86 acre floodplain wetland southeast of Annie Street(Sheet 1 of 6). The mitigation wetlands were constructed and seeded in fall 2007. The south wetland complex was built with several shallow water pools vegetated with wetland sod mats and custom native seed mixes. The north wetland was seeded with the custom seed mixes. Fifty Bebb, Pacific, and peach-leaf containerized willows were planted on the outside curve of Baxter Creek adjacent to the north mitigation wetland in August 2008, The following information was outlined in an email sent to Jean Ramer, the Army Corps agent for this project, from Barbara Vaughn on November 15,2007. The original permit allowed for 4.08 acres of impact. The extent of impacts completed at the time of the permit expiration was 2.24 acres. The total mitigation credits accrued at the time of the permit expiration was 3.05 acres leaving a mitigation credit of 0.81 acres. The mitigation credit asstunes a 1:1 ratio for creation of a viable wetland (floodplain wetlands on Baxter Creelc) completed prior to the subdivision construction activities. Jean Ramer was contacted via email on October 17, 2008, to ascertain whether the excess mitigation credit could be applied to the new permit. She stated that the mitigation credit could be applied to the new 404 permit provided that the mitigation wetlands meet the required success criteria within the three year monitoring period. The remaining wetland impacts for the new 404 permit totaling 0.06 acres (0.87 less 0.81) would be mitigated for by enhancing the Baxter Creek and Baxter Ditch corridors with the installation of containerized native trees and shrubs. Enhancement of 5.4 acres of wetlands associated with the Baxter Creel( corridor at a 4:1 ratio would yield 1.35 acres of credit. Enhancement of 0.17 acres of the Baxter Ditch wetland corridor will provide 0.043 acres of credit at a 4:1 ratio. The City of Bozeman requires a 50-foot setback from the edge of perennial streams and the associated wetland fringe, which will create a water quality buffer. A public trail constructed with sand and clay will be built within the outer 20 feet of the 50 foot watercourse setback. 1.3 BASELINE, INFORMATION Ouautify Wetland Resources The extent of the Baxter Creek riverine wetlands decreased after 2002 as shown on Sheet 1 of 6. In 2001, the Baxter Creek riparian corridor encompassed approximately 7.8 acres. In 2008 the riverine wetlands extend across 5.4 acres, a reduction of 2.4 acres. The Baxter Ditch channel and riverine fringe encompass 0.17 acres. Baxter Creek and Baxter Ditch are classified as lower perennial riverine wetlands with rock bottoms under the Smith Hydrogeomorphic System (Smith et al. 1995). The riverine fringe is dominated by emergent vegetation (Cowardin et al. 1979). The water regime is permanently flooded. Baxter Creek flows north, ultimately discharging to the East Gallatin River approximately 10.5 miles north of the project site. Riverine wetlands occur in floodplains and riparian corridors in association with stream channels (Hansen et al. 1995). Water usually, but not always, flows in riverine systems. Dominant water sources are overbank flow from the channel or subsurface hydraulic connections between the stream channel and wetlands. The functional assessments were completed in 2001 as part of the original delineation. The Baxter Creek corridor scored highest in functional value of the wetlands on the project site. Mttt"gateon plan- t aurel glen subdE k4pPt s It was rated as a Category III wetland with 52.4 percent of the total possible functional points. Baxter Creek scored high for general wildlife habitat, production export and food chain support, and groundwater recharge and discharge. The ratings were moderate for sediment, nutrient, toxicant removal, and sediment and shoreline stabilization. The creek scored low for general fish and aquatic habitat as a result of the on-stream reservoir. Baxter Ditch was rated as Category IV wetland with 26 percent of the total functional points. The creels was rated moderate for general wildlife habitat and sediment, nutrient, and toxicant removal. The remaining functional ratings were low. Existing Hydrology, The subdivision site is located on the Bozeman alluvial fan complex, an extensive Quaternary-aged geologic formation covering much of the southwest corner of the Gallatin Valley. The property is relatively level (1.0 to 1.5%) ranging in elevation from approximately 4,760 feet above mean sea level (amsl) at the south boundary to 4,740 feet artist at the north boundary (USGS 1987). There are no potential geologic hazards present with respect to slope stability, mass movement, surface subsidence, or soils bearing capacity.. Three perennial waterways traverse the property; Baxter Creek, Baxter Ditch, and the tributary to Aajker Creek. An extensive system of waterways originates in the Gallatin Valley, flowing in a northerly direction to the East Gallatin River. The three perennial streams are tributaries of the East Gallatin River and,therefore, are considered "Waters of the US". This area of the Gallatin Valley exhibits a relatively shallow groundwater table. Groundwater depths typically range from one to six feet below the ground surface. Groundwater depths measured in monitoring wells located on the south side of Durston Road fluctuated between 0.25 and 2.5 feet in 2001. Seasonal high groundwater rises within two to tjnree feet of the ground surface across much of the site. Existing Vegetation The upland bench west of Baxter Creek between Glenwood Drive and Annie Street was dominated in 2008 by meadow foxtail (Alopecurus pratensis — FACW). A shift in plant dominance had occurred since the 2001 delineation resulting in less Baltic rush (Juncus balrirus— OBL) and Nebraska sedge (Carex nebrascensis — OBL). Secondary upland species included smooth brome (Bronrus inermis — NL), Kentucky bluegrass (Poa pratensis — FACU+), nnusk thistle (Carduus nutans — NL), common dandelion (Taraxacum officinale — NL), and wild mustard(Brassica kaber—NL). Vegetation within the riverine fringe was dominated by meadow foxtail, beaked sedge (Carex utriculato— OBL), and Nebraska sedge. Isolated clusters of Bebb willow (Salix bebbiana — FACW) and thin-leaf alder (Alnus lenuifolia — FACW) lined the streambanks. The wetland vegetation associated with Baxter Ditch was primarily confined to the channel edges and small, shallow adjacent basins. Species along the channel included meadow foxtail, Kentucky bluegrass, and beaked sedge. In inundated areas, beaked sedge and Nebraska sedge dominated the cover. Upland vegetation included smooth brome, Canada thistle (Cirsium arwense — FACU+)and quackgrass(Agropyron repens,FACU) Existing Soils The Gallatin County Soil Survey classifies the project landforms as stream terraces and alluvial fans.formed on loamy alluvium parent material. The area receives approximately 15 to 19 inches of precipitation per year based on the soil survey data. There are eight mapped NRCS soil types within the property boundaries. Soil adjacent to Baxter Creek was identified as poorly MiN;gation.Plan.- 1_4urel glen..Subdiyslon. 4 drained Lamoose silt loam (537A), hydric soil classified as Typic Endoaquolls. The remaining soil types located in upland areas included the Hyalite-Beaverton Complex (448A), Turner loam (57B), or Amsterdam-Quagle silt loam(453B). These soils are characterized as non-hydric,well- drained silt loams found on alluvial fans, stream terraces, and relict stream terraces. Soil near Baxter Ditch was mapped as the well-drained Hyalite-Beaverton Complex, non-hydric soils classified as Typic Argiustalls. Other map units identified onsite include the Fairway silt loam (511A),Enbar loans(509B),and Meadowereek loam(510B). The geotechnical report concluded that the site is covered by 0.5 to 1.0 feet of topsoil and vegetation. The underlying soils consist of a layer of loan clay and sandy lean clay ranging in depth from 1.5 to 3.0 feet below the existing site grades. The fine-grained soils are moderately compressible, have a low potential to swell, have a medium plasticity and are soft to medium stiff. Gravel with sand and cobbles was encountered beneath the clay layer up to 14.5 feet below existing site grades. Existing Wildlife Wildlife use based on the observation of scattered wildlife groups and the common occurrence of wildlife signs consisted of white-tailed and mule deer, short-tail weasel, voles,field mice,common tern, sandhill cranes, blue heron,hawk species(Buteo spp and Accipiter spp,),and falcon species(Falco spp). Historic and Current Land Use Historic land uses include agricultural production(grass hay) and livestock grazing. The surrounding area encompasses relatively flat terrain characterized by irrigated cropland. The subdivision lies on the west edge of Bozeman within the area slated for development by the 2001 City Master Plan. Watershed Context/Surrounding Land Use The south boundary of the project parallels Durston Road. Valley West Subdivision is located south of Durston. Flanders Creek and Rosa Subdivisions are located east of Laurel Glen. The land west and north of the project is relatively undeveloped, used for crop production and livestock pasture. Baxter Creek, Baxter Ditch and the Aajker Creek Tributary are located within the project boundaries. All three stream systems are classified as perennial drainages that ultimately discharge to the East Gallatin River north of Belgrade,Montana, 1.4 MITIGATION SITE SELECTION AND JUSTIFICATION The permit is conditioned to require compensatory mitigation to offset wetland impacts. Wetland impacts were avoided and minimized to the extent possible. Impacts to wetlands occurring onsite associated with the development of the Laurel Glen Subdivision will be mitigated within the boundaries of the proposed subdivision. The extent of proposed impacts to jurisdictional waters of the US totals 0.87 acres for development of Phases 3 and 4. Infrastructure construction is anticipated in 2009 or 2010 dependent on the preliminary plat approval, USACE permit approval, and the economy. Mitigation details including the ratios used to calculate mitigation requirements are listed in Table 1.0. Enhancement of 5.4 acres of the Baxter Creek corridor and 0.17 acres of the Baxter Ditch corridor will entail planting clusters of containerized native trees and shrubs along both sides of the channel. Development of a woody overstory is expected to increase the structural diversity of the riverine wetlands and to improve the general wildlife habitat particularly for birds. The structural diversity and evenness of the vegetated classes relate to the amount of niches available in an area (MDT Montana Wetland Assessment Method 1999). More potential niches become Mltigattia:n.Man-e aurel glen subdivisinw S available as more habitat layers occur. The number of wildlife species increases with a corresponding increase in structurally complex habitats(Cooperrider et al. 1986). Baxter Creek was rated as a Category III wetland with 52.4 percent of the total possible functional points. Increasing the structural diversity and removing the on-stream reservoir would raise the General.Fish and Aquatic Habitat rating from low to high; the Flood Attenuation rating from low to moderate, the Short and Long Term storage rating from low to moderate, and the rating for Sediment,Nutrient, and Toxicant Retention from moderate to high., The total potential functional lift would be an additional 1.4 functional points, increasing the total possible functional points from 52.4 percent to 53.8 percent. Enhancement of 5.4 acres of Baxter Creek will provide 1.35 acres of mitigation credit at a ratio of 4:1. Enhancement of 0.17 acres of the Baxter Ditch wetland corridor will provide 0.0425 acres of credit at a 4:1 ratio. An 8.5-acre, 50-foot wide upland buffer or watercourse setback will be established on each side of the Baxter Creek and Baxter Ditch channels. The slopes in the upland buffer are one to two percent and the vegetation cover is herbaceous. A trail system will be constructed at the outside edge of the buffer. The watercourse setback area and the Baxter Creek riparian corridor will be designated as dedicated parkland under the plat approval. The designation prohibits any buildings or physical structures except accessories to the provision of recreation, including but not limited to benches, picnic tables, or interpretive signage (Bozeman Unified Development Ordinance January 2004). Short-term maintenance of the parks will be the responsibility of the homeowners' association. Long-term maintenance will be the city's responsibility once a city- wide parks maintenance district is formed. The city enforces building setbacks and restrictions through required building pennits and review. The homeowners association will enforce building restrictions through design review. The hydrogeomorphic class of Baxter Creek and Baxter Ditch is lower,perennial riverine wetland. Dominant water sources are overbank flow from the channel or subsurface hydraulic connections between the stream channel and wetlands. The following functions are detailed in the Montana Department of Transportation (MDT) form authored by the Montana Inter-Agency Wetland Committee and revised in May 1999. The goal of onsite compensatory mitigation will be to ensure"no net loss" of wetland area within the project boundaries and to increase the value of the following functions. 1. General Wildlife(Birds)Habitat 2. General Fish and Aquatic Habitat 3. Long-and short-tern surface water storage 4. Sediment/nutrient/toxicant retention and removal 5. Production export/food chain support 6. Groundwater Discharge/Recharge 7. Recreation/Education potential Mint.at4on,Alan-Gaurel eye6 Subduslon Table 1.0 Mitigation Details Wetland ID Number, Impact/Mitigation Impacted Mitigation Mitigation Type,and Location Type Acreage/ Ratio Credit Total (acres) Mitigation » ....�,.� . Acl.:_Cale-,: -1 Culvert Installations 0.85 Baxter Creels for Glenwood Drive, Lower, Perennial Annie Street, Sherwood Way,and Riverine Oak Street W-2 0.02 Baxter Ditch Culvert installation for Oak Street Lower,Perennial Riverine TOTAL, 0.87 Floodplain wetlands Creation in 2007 adjacent to Baxter prior to site 0.81 1:1 0.81 Creek construction W-1 Enhancement 5.4 4:1 1.35 Baxter Creek W-2 Baxter Ditch Enhancement 0.17 4:1 0.04 TOTAL 2.2 Mtr[gatlon.nlgvi.- �auret ct�ti,subdivision ,-- 2.0 RE'EVEGETAT ION PLAN The creation of two floodplain wetlands located east of Baxter Creek was completed in fall 2007. The south wetland encompasses 0.9 acres of shallow open water pools and floodplain vegetated with wetland sod mats and a nativo seed mix. The north wetland encompasses 0,86 acres of floodplain that was revegetated with a native seed mix. The outside bend adjacent to the north wetland was planted with 50 native willows in summer 2008. Clusters of trees and shrubs will be planted within the wetland as part of the enhancement of Baxter Creek. The enhancement of Baxter Creek will be completed in 2009 or 2010 depending on the economy and approval of the preliminary plat and 404-permit. Trees and shrubs will be planted in early spring or early fall when the plants are dormant (Section 3.0 —Revegetation Implementation). The primary goal of the enhancement project is to increase the structural diversity of the Baxter Creek corridor by planting native trees and shrubs. The stream channel is permanently flooded. The wetland plant materials list (Table 1 — Appendix A) identifies species that tolerate fluctuating levels of soil saturation and inundation, aid in soil stabilization, add species diversity, and provide food and cover for wildlife particularly birds. An upland buffer will be established at the edge of the riverine fringe associated with Baxter Creek and Baxter Ditch. The water quality buffer will be a 50-foot wide strip vegetated with herbaceous species and clusters of woody trees and shrubs. Baxter Creek and the upland buffer will be dedicated as parkland for the City of Bozeman. 2.1 RE VEGETATION DESIGN Existing groundwater levels will dictate the location and selection of woody species and plant materials. The plant selection was based on existing native vegetation and existing topographical, hydrological, and soil conditions. The design uses species identified during the wetland inventory. Additional native wetland plants indigenous to the area were selected to increase diversity and to .fill anticipated hydrological niches within the constructed wetland areas. Table 1.0 of Appendix A includes a comprehensive species list that summarizes common names of the selected species and the anticipated hydrological planting zones, plant sources, and spacing requirements for the trees and shrubs. Tables 2.0 and 3.0 provide seed mixes for disturbed wetland and upland areas, respectively. Planting Guidelines addressing site preparation, planting holes, and seeding methods are included.in Appendix A. Live Plant Materials Woody plant species will be planted from containerized 1-to 15-gallon or ball and burlap (B&B) nursery stock depending on availability and cost. Base flow groundwater levels will dictate the location of individual species. Approximately 24 clusters of containerized plants will be installed along the Baxter Creek corridor to simulate natural plant communities. Plant clusters will contain nine to fourteen plants. Wetland clusters in the transition areas will consist of black cottonwood (Populus trichocarpa), quaking aspen (Populus tremyloides), red-osier dogwood (Cornus stolenifera), and/or golden currant (Ribes aureum). The spacing on the black cottonwood, quaking aspen,red-osier dogwood, and golden currant is 20 to 30 feet, 15 feet,6 to 8 feet, and 3 to 4 feet, respectively. Clusters near the stream channel will consist of black cottonwood, Booth, Bebb, and/or Pacific willows (Salix boothii, bebbiana, laslandra, respectively.),and red-osier dogwoods. The spacing on the Booth,Bebb,and Pacific willows is 6 to 10 feet, 10 to 15 feet, and 6 to 20 feet, respectively. Upland clusters will contain common chokecherry (Prunus virginiana), Western servicebeny (Amelanchier alnifolia — UPL), Wood's rose (Rosa woodsli), common snowberry (Symphoricarpos albus), and/or American silverberry Mttiyatioar PiAaa— Lqu,rzl Clew subdlvisiow &' (Elaeagnus commutata). The spacing of the plants is 8 to 10 feet, 10 to 15 feet,3 to 4 feet,3 to 5 feet,and 3 to 5 feet respectively. Seed Mixes The seed mix for disturbed areas within the riverine fringe focuses on species that tolerate periodic inundation and drought and thrive in loamy soils (Table 2.0). The selected herbaceous species also aid in soil stabilization as a result of quick establishment and rilizomatous root structures. Disturbed wetland areas will be seeded with tufted hairgrass (Deschampsia cespitosa — FACW), slender wheatgrass (Agropyron trach)lcaulum. — FAC), tall mannagrass (Glyceria grandis-OBL),fowl bluegrass(Poa polustris—FAC), and slender rush (Juncus tenuis-FAC). Disturbed or bare areas within the buffer will be planted with a native upland seed mix comprised of slender wheatgrass, Canada wildrye (Elymus Conadensis — FAC), sheep fescue (Fesluca ovina -NL), Western wheatgrass (Agropyro snuthii — FACU), Canada bluegrass (Poa compresso— FACU), and streambank wheatgrass (Agropyron riparium —NL) (Table 3.0). The upland trees and shrubs listed on Table 1.0 will be planted in clusters within the buffer zone. No buildings or development except a trail will be allowed in the buffer zone. i Mitigation.Plan - Laurel :glen subdivfsi0n. 3.0 REVEGETATION IMPLEMENTATION Native ti-ees and shrubs will be planted along Baxter Creek in spring or fall 2009 or 2010. The timing of the planting sequence will depend on the weather and soil conditions. The following section describes the revegetation schedules and implementation techniques including site preparation, seeding/planting methods, planting locations and platting density. 3.1 SCHEDULE The revegetation schedule is based upon the assumption that planting of the trees and shrubs and seedbed preparation will be completed prior to seeding. As a general rule, seeding will take place immediately prior to the period of maximum precipitation from October 15 to May 15. Woody species will be planted while dormant prior to bud break, wluch is generally late April or early May. Alternatively,woody plant materials can be transplanted in late fall after the species have hardened off(dormant) for the winter. The planting time-line is included in Table 2.0. ']Cable 2.0 Plantin Time-Line Se uence Task _ Equipment ]Date Comments Limitations _I.Seedbed preparation Rakes,tt•aetor Anytime prior to Loosen compacted soils,breakup soils Avoid excessively and harrow seeding clods wet or frozen soils Drill seeder and Areas will be raked broadcast October 15 tluu following broadcast Do not seed into 2. Seeding seeding. Seed needs frozen or areas seeding May 25 equipment 1/2to 1/4inch of soil covered with water. cover. 3. Planting dormant Early spring Hand tools (April to late nursery stock Do not plant in augers, mini- May)or in the fall (containerized trees excavator (late September to frozen Duna. and shrubs) late October 5. Seed disturbed Hand broadcast Last task to be Do not disturb areas or drill seed any completed seeded areas, disturbed areas 3.2 SITE PREPARATION AND PLANTIING METHODS Site Preparation The objective of site preparation is to facilitate vegetation success by ensuring that conditions are appropriate for seeding. Some roughness of the growth medium is desirable for providing microsites for plant germination and growth. Excessive roughness can be unattractive and impede plant establishment. Seeding Methods Seeding is most successful when the seed is incorporated into the soil. Seed germination rates increase notably if the seed is covered with a thin layer of soil (r/4 to ''/s inch). Covering the seed also protects the seed from birds and rodents. Broadcast seeding will be used in areas that are small and have limited access. Incorporate the seed into the soil after broadcast seeding by mftlgation plan-Laurel C,len subdMstow go dragging a pasture harrow, rakes, chains, or other implements over the soil surface. Rccommended seed rates assume that the disturbed areas requiring seeding will be small and, therefore,broadcast seeded. Broadcast rates will be reduced by 50 percent if drill seeding is used, First Growing Season Results The first growing season is a critical period for seeded species. First year cover is often comprised of patches of dense growth interspersed with bare areas. Total cover typically increases notably by the second year. Persistently bare areas may require raking to reduce compaction or additional topsoil and seeding. Annual weeds are typically problematic only during the first growing season. Seedlings of desirable species are more robust with a fully developed root system in the second year,which limits the encroachment of annual weed species. On-site Planting A combination of 1-, 5-, and 10-gallon and ball and burlap containerized nursery stock will be used to provide a range of size classes. An on-site vegetation specialist will flag the location of each woody species prior to planting. Planting specifications are included in Appendix A. Planting Location and Density The planting plan will not be developed until the preliminary plat is approved. The actual location of the trees and shrubs may vary in the field depending oil the presence of excessively saturated or rocky soils. Minimizing Post Seeding Disturbances Seeding of disturbed areas will be completed following the installation of the trees and shrubs. root paths will be established to minimize traffic. 3.3 IRrUGATION Woody species may require irrigation during the summer months of the first year following transplanting,. The landscape contractor will irrigate the woody species manually as needed throughout the first growing season(fi•om June through early September). 3.4 WEED CONTROL, Weed control is critical before and during the first year when the water levels vary leaving the ground surface exposed. The contractor will be responsible for the control and eradication of noxious weeds before they seed and before the seeding and planting period. Only aquatic-labeled herbicides will be used within the wetland site. A Gallatin County Weed Control District Noxious Weed Management and Revegetation Plan were submitted to the Gallatin County Weed Control District. Morgan Hinesley received a license to spray weeds in 2007. He sprayed Curtail in 2007 and 2008 to target the Canada,musk, and bull thistle. The weed control program is ongoing. It has been especially effective on the Aajker Creek tributary after three years of chemical control. Mitigatiyn kart- Laurel *IrH.subdiyiscoa 3.5 SITE PROTECTION AND]t/fi A ].V1ENANCE The Baxter Creek and Baxter Ditch corridors will be protected from development by a 50-foot upland buffer from both sides of the channel. The corridor and buffer zone will be designated by the City of Bozeman as parkland. Short-term maintenance will be the responsibility of the homeowners' association. Long-term maintenance will be the city's responsibility once a city-wide parks maintenance district is formed. The city enforces building setbacks and restrictions through required building permits and review. The homeowners association will enforce building restrictions through design review. Potential problems related to weed and pest control,predation,disease,plant mortality, etc.will be identified during qualitative monitoring(see Section 4.1) conducted annually. . Mittgatton man- "urel crltn,5ubalyistopt xa 4.0 MONITORING PLAN Planting trees and shrubs for enhancement is scheduled for 2009 or 2010 depending on the infrastructure construction. Qualitative monitoring would commence the same year to identify any site management problems. Quantitative monitoring will be conducted during the growing season for three consecutive years after planting to assess the survival and health of the woody species. The monitoring parameters described below provide a means of qualitatively and quantitatively evaluating mitigation wetland performance. Monitoring will also yield information in support of post-construction contingency measures such as reseeding, replanting,weed control, and animal(pest)control. The final quantitative monitoring report for the Aajker Creek Tributary will be submitted in 2008. The first year of quantitative monitoring was completed on the constructed floodplain wetlands on September 8,2008. The report will be submitted in 2008 with the Aajker Creek Tributary data. 4.1 QUALITATIVE MOIQIfl'1 ORIlNC, Qualitative vegetation monitoring will be used to evaluate general site conditions, the success of the reproductive effort, the presence of bare or eroded zones, and the development of hydrological conditions. The information will be used to design appropriate management or contingency measures. The initial qualitative monitoring event will be completed the same year as the containerized plants are installed. Qualitative monitoring parameters will be based on field observations recorded during quantitative monitoring events and will include: o identifying the location,extent,and type of weed infestations, o noting plant damage from wildlife • noting wildlife use; and a completing photo documentation. Photomonitoring will be used to evaluate successional trends in plant growth, It will consist of photographing the random clusters of trees and shrubs. Photographs will be taken at approximately the same time each year. 4.2 QUANTITATIVE MONITORING Quantitative analyses will be used to describe planting success within the specified time frame. The monitojing plan assumes that vegetation transects will not be necessary based on the limited extent of seeded areas. Survival rates and plant health for individual woody species will be recorded annually within the mitigation wetland and upland buffer. Evidence of disease or wildlife browsing will be recorded and addressed if necessary. 4.3 WEED MANAGEMENT A noxious weed management plan has been developed and submitted to the Gallatin County Weed Control Board for the proposed subdivision. The weed management plan requires an annual assessment of weed conditions and implementation of control measures. Control methods will depend on the type, location,and extent of the infestations. 4.4 MONITORING AND REPORTING FREQUENCY Quantitative and qualitative monitoring will be conducted annually beginning with the first growing season following the installation of the plants. Monitoring results will be summarized in a yearly report that will be submitted to the USACE for three years following Midi a t4ort PMA- 1-!lure6 cg04 stebdEVisloai. ;3 construction or plant installation. At the end of the three-year monitoring period, the monitoring results will be evaluated to determine whether site conditions meet the performance standards outlined in Section 4.5. 4.5 SUCCESS CRITERIA Criteria were established to measure the success of the proposed mitigation project based on the goals presented in Section 1.4. Performance standards will be measured at the end of the third growing season. 1. Mortality of the containerized trees and shrubs cannot exceed 20%. 4.6 CONTINGENCY PLAN Should the mitigation areas not meet the success criteria referenced above, Hinesley Development will be responsible for identifying the cause of failure and developing contingency measures to remedy the problem. Potential options addressing lack of vegetation success may include replanting and weed control. The contingency plan would be developed based on specific information and circumstances on an as-needed basis in consultation between the permittee and the USACE. References: Berglund, Jeff, May 25, 1999. MDT Montana Wetland Assessment Method. Montana Department of Transportation, Helena,Montana. Cooperrider,A.Y., R.J. Boyd, and H.R. Stuart, eds. 1986. inventory and monitoring of wildlife habitat. U.S.D.I.Bureau of the Land Management Service Center,Denver,CO. 858 pp. Platt, W.S., C. Armour, et al 1987. Methods for evaluating riparian habitats with application to management. USDA,Forest Service General Tech Report,INT-221, 177 pp. US At-my Corps of Engineers, January 13, 2006, Personal Communication with Cathy Juhas, Billings Office, �- SP5GIES USTAND SG-G-D MIXES Mitigadoil-PlaA- L.G+urel 41ex.Suba'M!aaw TABLE 1.,0 WOODY SPECIES Upland and Transition Species Wetland Species Scientific Name Common Name Scientific Name Common Name Populus trichocarpa black cottonwood Salix amygdaloides peach-leaf willow Populus tremuloides quaking aspen Salix boothii Booth willow Primus virginiana common Salix bebbiana 13ebb willow chokecherry Amclanchier alnifolia Western Salix lutea Yellow willow servicebeiry Cornus stolon frera red-osier dogwood Salix lasiandra Pacific willow Ribes airreum golden currant Shepherdia argentea silverleaf buffaloberry Eleagnu.s commutata American silverberry Rosa woodsii Wood's rose Planting Details: o final species selection will depend on availability and post-construction water depths. o Wetland sod can be harvested and transplanted while the ground is frozen, The optimum time for seeding in this region is prior to May 30 or after October 1. Containerized trees and shrubs thrive best if planted while dormant,prior to spring bud break,which is typically mid-May. o Containerized species will be spaced according to the plant diameter at full maturity listed below. o Black cottonwood—20 to 30 feet o Quaking aspen—15 feet Red-osier dogwood—6 to 8 feet o Golden currant—3 to 4 feet o Booth willow—6 to 10 feet o Bebb willow— 10 to 15 feet o Pacific willow—6 to 20 feet o Yellow willow—1-0 to 15 feet o Peach-leaf willow—20 to 30 feet o Common chokecherry—8 to 10 feet o Wood's rose—3 to 4 feet American silverbeny—6 to 12 feet G Western servicebeiTy— 10 to 15 feet 1 TABLE 2.0 STREAMBANK STEED MIX Scientific Name Common Name founds/acre Comments tll Grass Species Agropyron slender wheatgrass 5.0 Establishes easily and quickly. tr•achycauluni Short-lived. Agropyron riparium "Sodar"streambank 5.0 Strongly rhizomatous. Useful in wheatgrass erosion control. Deschampsia caespitosa tufted hairgrass 2.0 Fast-establishing bunchgrass on both subirrigated and wetland sites. Agropyron:smlthli "Roseanna" Western 5.0 Establishes quickly and easily on wheatgrass disturbed sites.Good shade tolerance. Poo palustris fowl bluegrass 0.25 Common wet meadow herbaceous species Glyceria grandis American mannagrass 0.25 Excellent rhizomatous species for streambanks and wetlands. Grass-like Species Juncus tenuis* Slender rush 0.06 Rhizomatous species Total 17.56 PLS (1)Based on a drill-seeding rate of approximately I7.56 pounds PLS(pure live seed)per acre. Rates will be doubled for broadcast seeding. Factors.considered for development of the species list: e Adaptability to saturated and temporarily flooded conditions as well as sub-irrigated hydrologic regimes; o Ability to establish easily and quickly to facilitate soil stabilization and to deter initial weed and other volunteer species invasions; ® Ability to out-compete weeds; and e Enhancement of species diversity and aesthetics. 2 TABLE 3.0 WETLAND SEED MIX Scientific Naive Common Name Pounds/acre Comments (1) Grass s ccies Agropyron slender wheatgrass 5.0 Establishes easily and quickly. hwch ycaulum Short-lived. Glyceria striata fowl mannagrass 0.5 Excellent rhizomatous species for wetlands. Deschampsia caesphosa tufted hai grass 2.0 Fast-establishing bunchgrass on both subirrigated and wetland sites. Poa palush•is fowl bluegrass 0.25 Common wet meadow herbaceous species. Grass-like Species — -- Eleocharts palustrls* Creeping spike-rush 0.5 Short,rhizomatous species. Useful in establishing quick cover in riparian areas. Juncvs tennis* Slender rush 0.06 Rhizomatous species. TOTAL 80.31 PLS Based on a drill-seeding rate of 8.31 pounds PLS(pure live seed)per acre. Rates will be doubled for broadcast seeding. Factors considered for development of the species list: o Adaptability to saturated and temporarily flooded hydrologic regimes; o Ability to establish easily and quickly to facilitate soil stabilization and deter initial weed and other volunteer species invasions; o Ability to out-compete weeds;and m Enhancement of species diversity and aesthetics. 1 3 TABLE 4.0 UPLAND SEED MIX Scientific Name Common Name l'oundshicre Comments Grasses Agropyron slender wheatgrass 4.0 Establishes easily and quickly. track eaulum Rhizomatous s ecies Elymus canadensis Canada wildrye 4.0 Tall buncltgrass. Establishes easily providing quick initial cover on well-drained banks or transition areas. Festuea ovina C:ovar sheep fescue 1.0 Very drought-tolerant. Long- livedbunch ass. Agropyron sntithii Rosanna Western 4.0 Rhizomatous species wheat ass Poo compressa Reubens Canada 0.5 Useful in restoration of riparian blue ass sites. Agropyron riparium Sodar streambank 5.0 Strongly rbizomatous. Useful in wheat,grass erosion control. TOTAL 18.50 PLS (1)Based on a drill-seeding rate of approximately 18.50 pounds PLS(pure live seed)per acre. Rites will be doubled for broadcast seeding. Critical factors considered for development of the species list: o Tolerates a wide variety of soil moisture levels; o Establishes easily and quickly to facilitate soil stabilization and deter initial weed and other volunteer species invasions;and o Reduces weed competition 4 WETLANDS IMPACT SUMMARY LAUREL GLEN SUSDlV sjoN -- PHASES 3 & 4 LOCATED IN THE S 112 OF SECTION 4, T. 2 S., R. 5 E. OF' P.M.M., CITY OF' BOZEMAN, 0ALL4TIN COUNTY, MONTANA YI , yYo•. �,,,,..•- ..`� /' Wr MLWMI!NLLrNP+ � bb �ttwq NN¢�1 K MlLIr10+1 L: 1 / •NfISr - IWnL.n,'a�L1rn L!C,sAltl _ //ILL.)>)W q ` 1 :1 L.�.• n.wYw Inc nLVq• •.1. +5 ,.'w 00 PM `QQ•'�. '" 3'rl• / ` ��U�'ft':at . BLOCK 3U i V) t. RX .. 1�•ti�` Ym,w pth, I�f'Z•' � (!'�.��( ;1i 5is yla 5i� g11'• 5i1,']isf ' � _II �O ` �•�.�J � I r r 1 , �,,N i . ��a„�,+5�.r''�-I ��•` '"t_. ,� �i� �� 5i1 9ii 5ie 5u_5ii � I 'r°•1 z I �•� M.:,._.",I=•—M1J►.1,..� � r.; VGTH. '/ tlp.n -..I L �FGFJ� i Pm"' �....— EY.ISTINO wETLND DouNaRr CEXISTING MITIGATED WEILANOS I -__• ' 10 PROPOSED V,ETIAND DISTURBANCE t• \•. — "t" PROPOSED DETENTION POND M! 24 9d 1 Vl� p7' 1 I lgrlp l -- PROPOSED TRNL I'1. - o PROPOSED Sd•D!r RCP CULVERT 'I - •�ca !!DOSS ' .{` '"Y'' , + 1 i5t r 5M 3(!i i Wr,� _� t y is 2 gF �, i•,nl C 1 I - _ IYWROtt qY_ __.-_ _- -- _ �'•.... ;�/ I •'I•I / � �j ti•r',.T _ ' i A rj' >:•i ':I• �;r =' =:r t �:1 ^I; L. ,,I/ I :1 I'; •,, ..v �`��f�;(! i'9n_ D 1 gn '�i�..tyl gi�}gr. .gil, ,� •�� 11 I ', 1;� _5 I m , . gunm two I,LQr�,.' I I,;f r- �Lu '- 'i. V11�' .� 1_..•f l; .� + .. _�, J•�'`•t�,I ,•9u 5D _ hr § gii_�1 5�s �u yi,•�u'r ; ',�.. _tt I�;I 1 w g '� !h yli q i yi%yfi gii y0 5u 5R.91! gill �:;. p• I i;, i rT - --tl+t :. ry m __ _- _ -_ -I I•Ri1..LS) Xli �.; j ,, _T •; � ;'}Lor, %g i 9ii 9ii 5u 5i?,4'li 9i 511 yI, gB 9a J' l j v, '_i :L': ^... I.N� l-'-- -- - nnr am -- ---- - 'Ih,ri- �>. ;1;it I r,,I •�"��1'�,� ...� i Tali 1 TIOT�' -- - 'inra - e -- - LT' l /, `, •1 / .1 •I�.� .r�., LPG t;� + nL1: i l •_ ..'S"n:i 'n>: J I..JI' r,/ .� l r 1 - .u�'�t�",,� _..,� �--tee•- .tc-•.L.�_. "'�.,r•,—`-�" � .__� _ r,oclinaraw^ +ter _ .-' _ -•r,�•—.:_,.:.:.. IoYJOO gllMtWX QF?BgPQSFD Y/ETC ND IMN,jy,MS WEn NIO IMPACT 01 - 17.700 SO FT .• 0:4063 ACRES WETtANO IMPACTtl.AS7 SO R D.1041 ACRES WFTLAND IMPACT N3 7.110 SO FT D.Otl07 ACRES WETLAND IMPACT�14 •• 7,710 SD fT 0.1677 ACRES WETLA140 IMPACT 15 • 933 SO R 0.0714 ACRES .....I.n.I w,.w.a r.+. TOTAL IMPACT AREA + 17,949 SO FT. O.0712 ACRES ,r.iM uuu�y Mw.+w:;� OOSN EIIAhTJ A19,49FA CT LUIJ 6001 Sq F1 LOT 7 0.14 Au., 261,34 Sq Ft 0,GI Acr a II�ISTALL 108 LF OF 4 QT LOT 2 815'X54!' RCP CULV GOBI Sq Ft WITH FET'S 0.14 Acre, I LOT 1 7007 Sq Ft _A6 LF T.1- WETLAND IMPAaT #1 GLITNW, �00D PR I VE - ,,'I. -- - - -- - - - - U) "A JL ti'isTJNNBUILDINCS TO REM ED\ENPACE Impact #1(installation of new culvert for road and utility crossing) Culvert Size = 54"x88" Culvert Material = Reinforced Concrete Pipe(RCP) Culvert Length = 108' Wetland Disturbance Area = 17,786 square feet Sc(xle In Feet VOILIMe Of fill placed over wetlands = 1,400 Cubic Yards 80 0 80 Composition of fill = washed rock pipe bedding F-. -, _ 6' minus pit run backfill and 24 0 24 road sub—base Scale In Meters 1" minus road base Asphalt (top 3") Design Flow = Base Flood(100—yeor) = 169 cfs Engineering end'Surveying Inc.. 1091 Staner9dqo Drive-Bozeman,WIT 5971 B Phone(4061 587-1115-Fax(405)5B7-97O6 #06534 vxm.ohangineers.corn-info@chenginEiLrs.coni Sheet 2 of 6 T 4-ks-11 EXO-i,7901 , F-77 27244 7: 50. 1ANt) S \BUSHES TREES INSTALL 141 LF OF. 88' "X54!" - R-CULVERT' WjITH FET'S —WETLAND IMPACT #2 . -ANNIE SPREET AREA==:8,4.57 SQ FT _7 I ET04TION P N p38 ID ,DEPTH R 35 SO. 61 So.I AOoo F _j two r-T Impapt 2(Instal lotion of new culvert for road and utility Gross ing Culvert Size = 54"x88" Culvert Material = Reinforced Concrete Pipe(RCP) Culvert Length = 141' 1 Wetland Disturbance Area = 8,457 square feet Scale In Feet Volume of fill placed over wetlands = 1 ,040 Cubic Yards 80 0 80 Composition of fill = washed rock pipe bedding 6" minus pit run ba-ckfill and 24 0 24 road sub-base Scalp In Meters 1" minus road base Asphalt (top 3") Cg Design Flow = Base Flood(100-year) = 169 cfs L� [-Znglnaerihg and Surveying Inc, 1091 Stoncridge drive*Bozeman.NIT 59718 Phoria(4061587-1115-Fax 1406)587-97$B wwvj.chenginents.corn-'1nfp(0chenUinr-Prs.coit% Sheet 3 of 6 #06534 IPA Ex iS®T �o. PAMLl WETLAND IMPACT #3 `a,,AREA=3,753 SQ FT • �j„ PLAYGROUND // XISTING IMPACT i - `REMOVE EXiSkNr 30 LF AREA=2, 162 SQ FT TEDE NT NT 1 0 1; or• as'• CSP col:! RT o ( CENTERLINE OF l POND ' r' STREAM CHANNEL PH . 1 / 'i INSTALL 90 LF OF 88"X54" EDGE OF WETLAND r RCP CULVERT WITH FET'S ` MMON AREA / / 0.74 Acmt i GXISnNO PUBLIC PARK.!EAS AENT TO DE DEDICATED A5, UBU PMNMtNO WITH T}IIS AT 1V Impacts Re lacement of existing culvert for road an utility crossing; Culvert Size = 54"x88" Culvert Material = Reinforced Concrete Pipe(RCP) Culvert Length = 90' Wetland Disturbance Area = 3,753 square feet Scale In Feet Volume of fill placed over wetlands = 620 Cubic Yards 80 0 80 Composition of fill = washed rock pipe bedding 6' minus pit run backfill and 24 0 24 road sub—base Scale In Meters 1" minus road base Asphalt (top 3") Design Flow = Base Flood(100—year) = 169 cfs Engineering and.Survevirtg, Ins,: 1091 Stoneridge Drive•Bozeman,mr 59718 Phone(4061 587-1 11 6•Fax(4D8)587-5768 vvvnv.chen©Ineers.com•info Qohhengineera.com Sheet 4 of 6 #06534 q A� 4h FA t 0 T INS-FALL 84 LF OF 88"X5 RCP CULVERT WITH FET'S ,/-WETLAND IMPACT #4 AREA=7,1 10 SQ FT 77-7; .A A 0 EXISTING 1 �NP �Tr 59B SQ.FT. RETENTI POND PH. 2 I! LOT 1 Impact #4(Installation of new culvert for rood and utility crossing) Culvert Size = 54"x88" Culvert Material = Reinforced Concrete Pipe(RCP) Culvert Length = 84' Wetland Disturbance Area = 7,110 square feet Scale In Feet Volume of fill placed over wetlands = 84.0 Cubic Yards 80 0 80 Composition of fill = washed rock pipe bedding 1 6' minus pit run backfill and 24 0 24 road sub—base Scale In Meters I" minus road base Asphalt (top 3") Design Flow = Base 9ood(100—year) = 169 cfs Engineering and SurviByling Inc. tool swneridge Drive-Dommon,MT59718 Phone t406)587-1115-Fox(4C6]567417BEI wvAmchanginsers.corn-info Vchenoineers,com Sheet 5 of 6 #06534 INSTALL 84 LF OF 36%58Y2' RCP CULVERT WITH FET'S WETLAND IMPACT #5 AREA-933 SQ EMOVE EXISTING 26 LF OF 1 D" cSP cuLVERr i � 9 DETENTION POND '�6 MID—DEPTH AREA/ / y = 1,501 SOFT. ; 4 5906 S F1 1.57 Acres I JqqQ�' OPEN DACE" 3 �,, ,s U, <rec i \ I�r 1V Impact /5(Installation of new culvert for road and utility crossing) Culvert Size = 36"x 58Y2' Culvert Material = Reinforced Concrete Pipe(RCP) Culvert Length = 84' Wetland Disturbance Area = 933 square feet Scale In Feet Volume of fill placed over wetlands = 100 Cubic Yards 60 0 80 Composition of fill = washed rock pipe bedding �— 6" minus pit run backfill and 24 0 24 road sub—base Scale In Meters 1" minus rood base Asphalt (top 3") Design Flow = Base Flood(100—year) FM Engineerlhg and Surveying'Ino.. 1031 Stoneridge Drive•Bozeman.MT 59718 Phone[406)587-1115•Fax(40B)587-976B www.chengineets.com•1nfaePchong1noer5.c0m Sheet 6 of 6 #06534 i ALLIED ENGINEERING SERVICES. INC. February 4, 2002 Bob Murray, Project Engineer City of Bozeman Engineering Department PO Box 1230 Bozeman, MT 59771 RE: Laurel Glen Subdivision Flood Hazard Assessment—Baxter Creek Dear Bob: This letter provides our assessment of the flood hazard for Baxter Creek in the proposed Laurel Glen Development. The proposed development is a 156.96-acre site located on the north side of Durston Road approximately 1300 feet west of the intersection of Durston Road and Cottonwood Road. The proposed residential and commercial subdivision will be constructed in four phases. The proposed development will consist of a variety of buildable lots for single and multi-family use. The commercial area is proposed for Neighborhood Service area B1 zoning. The proposed subdivision will also incorporate open spaces and park areas. Please refer to the Figure One zone map for lot locations and area breakdown per zoning classification. Field Work Allied Engineering Services, Inc. surveyed cross-sections of the creeks in September, October and November of 2001 using survey grade Global Positioning System (GPS) equipment. Figure Two shows the location of these sections. Additionally, the culvert conveying Baxter Creek across Huffine Lane was surveyed. City of Bozeman BM#717,the northwest bonnet bolt on fire hydrant, (elevation 4793.18) located northeast of the intersection of West Babcock and North Ferguson is the elevation benchmark for the project. Hydrology The historical drainage basin for Baxter Creek is shown overlaid upon a United States Geological Survey (USGS) topographic map in Figure Three. The historical drainage area for Baxter Creek is approximately 2.0 mi2 upstream of the project site. Drainage patterns for the Baxter Creek basin are complex and highly modified from natural conditions. 39 Discovery Drive + Bozeman, MT 59718 + (406)582-0221 4 Fax(406)582-5770 Bob Murray Project:00•185 February h, 2002 Farmers Canal collects drainage from the south as it traverses northeast across the valley from its Gallatin River intake to Bozeman. Through slide gates located on the canal, the Fanners Canal Company can discharge water to the Baxter Creek drainage, Furthermore, ponds, culvert crossings, ditches, roads, and other obstructions have significantly altered the historical drainage network for the basins. Refer to Figure Four for an annotated aerial photo showing some of the features of the basins. Three different hydrologic methods were used to estimate historical runoff. The methods used are: Rational, SCS TR-55, and the USGS regressions equations given in Water-Resources Investigations Report 92-4048 (Omang, 1992). The applicability of each of these methods depends upon drainage area and other factors. For example, the USGS regression equations do not consider average slope of the basin, and therefore would tend to overestimate peak flows for relatively flat basins (which these are). The standard errors of prediction of the USGS regression equations range from 22 to 128 percent. Both the Rational method and SCS method require time of concentration (tc) as an input. The 'time of concentration, to was estimated using Manning's kinematic solution along with Manning's equation for open channel flow. Development in the basins both increases and decreases the time of concentration as compared to the pre-development condition. Tc is decreased by clearing brush, paving, drainage ditches, etc., and increased by detention from roads, ponds and other obstructions. A detailed analysis accounting for detention and ditches is beyond the scope of this project. The Rational method requires the rainfall intensity to correspond to a duration equal to tc. The required intensity value was estimated from the Intensity-Duration-Frequency (IDF) equations given on Figure 23 of the Bozeman Stormwater Master Plan (1982). Characteristics of the drainage basin are provided in Table 1. Area Curve Rational Tc ID (acres) Number C (Hours) Baxter Creek Basin 1263 74 0.3 3.2 Baxter Creek Basin — South of 700 74 0.3 2.5 Huffine Table 1. Drainage Basin Characteristics. For analyzing historical flows, the SCS method is selected as it best takes into account the various local variables that effect runoff. The default SCS rainfall distribution for Montana is Type II. Based on the criteria in section 7.20.3 of the MDT Hydraulics manual, an SCS Type I distribution was determined to be more appropriate for use in Bozeman. Allied Engineering Services,Inc. Page 5 LEGEND 200 _ XS LOCATION BRUSH CENTERLINE OF BAXTER CREEK 3,[i�tAO N :.: 0 ,'.0 r— F W � z ` WWI s, O 00 O 0 N o �_...� Q 0 u). C) CREE {Sv o n o t — o a ci, r• o N o a d 0 0Ln N o _ LAUREI, PARKWAY -• t ko _ REVISIONS DRAWN BY DATE 0 100 200 3p0 LAUREL CT7 �TS \ PROJECT k 00-185 FIGU GLEN S t_JBDI Y 1 '�1�iT � //// Civil Engineering ;+DISCOVERY DAI%E OATS 12/2g/oi �: 1 INCH 200 FEET .L N L..,L�. Land Surveying B07-EKIAN MT sq,l Flood Flg2-dng h �1 'E�t -� EE CRCQ S SEI✓`I'�ON DRAY?? 8Y: RFC ALLIED Gcuteehnical Engineering DHONE,40M -022I .c PROJECT ENGINEER:PJS PCIZEAMAN, MONI TA-NA CNGINEERING Structural Eneineering ratemnl5s:•_:o LAURELGLEASUBDIVI QE'SICNEO BY: PJS REVIEWED BY: DSC, CEIG '- sec,..�o I�� BAXTER CREEK X-SEC 7_�0 ......... p ;> x VIM 12 I'M'11-41 1h k RZ L -71 7 vjj rj C-q z3 s 0 CF— C�w Z A N FLANDERS MILL ROAD t p, -1 jZl. EAxTER CREEK T R — A D AINAGE BA43IN ' -.11 2.'0 SQ.MILES '--LAUREL GLEN:,-: SUB 'F4 DIVISION *'I L e Z '6ftDoncL1 d [D. 43 INK ul or,- t :.tr) M..�_ j vl� Soo f r PROJECT it OD-1A FIGURE _20— REMSIONS DRANW4 BY DATE 0 low 2000 30M LAUREL GUE Nt SUBDIVISION Civil Engineering 32 DISCOVERY DR)VF —FAM 12/29/01 3 Lznd Suneying BOZEMAN,NIT MIS Flood F1g3.dwq t' SCALE. 1 INVi 2000 FEET BA33-CTERCREEK DRAINAGE BASIN Gcotechnial Engineering PRONE[406)5,q2.0221 ALLIED FX*j 1406)531-577D LAUREL GLENN PROJECT ENGINEER: PJS BOZEMAN,MONTANA E;NGINEERING SErurvaralEngincering I DESIGNED BY�. PJS - DSC, COG DRATINTAGE CORRIDOR I REMEWED BY. 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'•� 'rlay ..n ,Y•'" rt• ,Y+.»'"i `U•+ rT ,-;,.,w,;, „r��.r% `t' 'y q a' 'S-- '4a'1•c `q „ r s:' ,�� ~t' .,5?rrrw�•. ri •. rt E I � I it �- /� r • • 1 � 1. Bob Murray February 4,2002 ProjecC 00-185 This is based on the ratio of the local six and twenty-four hour precipitation values given in the NOA.A atlas. The peak flows predicted by the Rational Method are significantly higher, particularly for frequent stone events. One reason is that the Rational method does not account for infiltration in a way that would differentiate the increased percentage of infiltration that occurs for smaller (more frequent) storm events. For example, for a given basin, there is same threshold storm event for which smaller stonns will yield practically no ninoff. This is modeled by an initial abstraction in the SCS method but is not predicted by the rational method. In summary, it is our opinion that the SCS method is the most applicable for estimating historical "run on" flows from the upstream basin. Results of the hydrologic modeling are provided in Table Two. Appendix A contains design notes and information used for the hydrologic analysis. Note that the computer program Culvert Master was used to calculate the SCS and Rational method given the following inputs: 1) SCS - basin area, SCS rainfall type 1, time of concentration, curve nurnber = 74, and the 100-year 24- hour precipitation depth (from NOAA.) = 2.8 inches; 2) Rational —basin area, C coefficient, IDF data from the City of Bozeman Storm Water Master flan, time of concentration, and a 100-year return.period. In determining the curve number for the SCS method, we assumed a pasture cover type in good hydrologic condition and a hydrologic soil group C (see Appendix C for soils information). USGS Rational SCS ID (cfs) (efs) (efs) Baxter Creek Basin 422 177 129 Baxter Creel: Basin — South of - - 82 Huffine Table 2. Base Flood (100-year) values for different Hydrologic Methods. We also looked at the possibility of increased peak flows during a 100-year storm event higher than those calculated using standard hydrologic methods (SCS) due to the altered characteristics of the basin. Specifically, we, investigated the possibility of higher peak flows occurring due to Farmers Canal discharging water into the basin, say by an overtopping or breaching of the canal bank. While we are unsure of how much flow Farmers Canal could discharge into the basin, we decided to look at the capacity of the culvert which conveys Baxter Creek under Huffine Lane. We obtained the hydrologic analysis (see Appendix B) done by the Montana Department of Transportation (MDT) in 1994 for the Huffine Lane rebuild project. In their hydrologic analysis for the culvert design, MDT calculated the following: • Base Flood (100-year) at culvert= 90 cfs e Overtopping Flood (overtops basin divide located approximately 320 feet to the west) _ 122 cfs with a frequency of<0.2% (greater than 500 years) Allied Engineering Services, Inc. Page 7 Bob Murray February 4,2002 Project:00-185 Headwater at Overtopping= 5.3 feet Channel capacity= 65 cfs rh Design Culvert: 54" CNIP We field verified a 54" CMP culvert in place with the following cllaractcnst.ics: • Length= 139 feet • Invert Elevation In = 4846.02 feet • Invert Elevation Out=4843.72 feet Using the computer program Culvert Master by Haestad Methods, we calculated a headwater depth of 5.4 feet at a flow of 122 cfs which closely matches the overtopping analysis done by MDT. Using the SCS method we also calculated a 100-year base flood of 82 cfs at the culvert which is reasonably close to the base flood floNv of 90 cfs calculated by MDT. This number (82 cfs) was used to estimate the proportion of the flow generated by the basin upstream of Huffine and downstream of Huffine. Considering the possibility of additional flow from Farmers Canal, a base flood of 169 cfs at the project site was used for-our hydraulic analysis. We arrived at this by adding the overtopping flow of 122 cfs conveyed under Huffine Lane to the flow contribution north of Huffine Lane, 47 cfs (129 cfs for entire basin— 82 cfs at Huffine culvert = 47 cfs). Hydraulics Water surface profiles for the proposed development were estimated using the U.S. Army Corp of Engineers' HEC-RAS River Analysis System computer Program, Version 3.0.1 (March, 2001). The geometry used in the model assumes post-development conditions which include the following: Five roads crossing Baxter Creek as shown in Figure One. Culverts extend 15 feet beyond the road right of way. The following right of way widths were assumed: o Oak Street: 120 feet o G1cn Ellen Drive: 60 feet o Annie Street: 74 feet o Glenwood Drive: 60 feet o Durston Road: 120 feet Removal of the existing pond and outlet structure located on the south end of the project and constructionfrestoration of the stream channel in this area. Allied Engineering Services, Inc. Page 8 Bob Mun-ay Project:00-1 EI5 FebruaiY 4,2002 j The channel portion of the cross sections at the upstream and downstream end of the culverts were interpolated from the held surveyed sections while the overbarrlc portion of the sections was taken from the topographic surface generated from the field survey. Cross sections 40, 420, 540, 1110, 1330, and 1340 were interpolated entirely from surveyed field data. The selection of Mam-ring's n values was based on Table 5-6 on page 112 of Chow's text Open-Channel Hydraulics (Chow, 1959). The following n values were used: • Channel = 0.04 • Overbanlc (high grass) = 0,045 • Overbanlc (brush) = 0.09 • OverbalLk (intermittent brush) 0.06 • Concrete Pipe= 0.013 The model was run in the mixed flow regime with starting conditions at the downstream and upstream end of the model set at normal depth with slopes of 0.0075 and 0.02 fl/ft, respectively. A mixed flow regime was used because both supercritical (in and downstream of the culverts) and subentical flow occur in the model. As discussed in the hydrology section of this report, a base flood of 169 cfs was used in the model. To account for possible future development outside of the stream corridor, encroachment method number one was run in HLC-RAS with encroachments set at the stream corridor boundary (i.e. at the property boundary between the stream corridor and adjacent private/park lands). As shown in Figure Five, the un-encroached base flood only goes outside the stream, corridor significantly in the backwater areas upstream of culverts. There was no significant difference between the water surface elevation of the encroached and un-encroached models. The data for the encroached and un-encroached runs is provided in Appendix D. Reinforced concrete pipe (RCP) culverts were used in the model as they are required by the City of Bozeman (page 47 of City of Bozeman Design Standards and Specifications Policy, 2001). To evaluate backwater upstream of road crossings, we modeled three culvert configurations for the road crossings: 1. Two 48-inch RCP culverts 2. Two 58.5 x 36 inch reinforced concrete pipe arch (RCPA) culverts 3. One 88 x 54 inch RCPA culvert In determining the floodplain elevations for our study, we checked the above three options .for each crossings and used the option that resulted in the highest water surface upstream of each crossin?. We chose not to consider more than two culvert barrels to avoid the need to widen the stream bed (generally 8 to 18 feet from bottom of bank to bottom of bank). Of course larger culverts would also be acceptable but would cost more. Allied Engineering services, Inc. Page 9 Bob Murray S F�ebru"v 4, 2002 Project:00-I8 The existing culvert at Durston Road is a 48-inch co7ugated metal pipe (CMP). We also evaluated the culvert crossings in I-IEC-RAS using one 48-inch RCP culvert to match the size of the existing culvert at Durston Road. Using one 48-inch RCP culvert at the road crossings increased the backwater approximately one to two feet compared to the culvert configurations listed above. Figure Five shows a plan view of the site with the un-encroached base flood boundary and un- encroached base flood contours. Note that the flood elevations in Figure Five are the maximum of the three water surface elevations calculated for the three above listed culvert configurations. Appendix D contains summary printouts from the HEC-RAS program. In the HEC-RAS output, profile one refers to the un-encroached geometry and profile two refers to the encroached geometry. Unfortunately, there is no historical data (flows and flood elevations) to calibrate the model for high flow. If data existed to calibrate the model, the Manning's n values could possibly change. Increasing Maiming's n values would increase the base flood elevation. We believe the Manning's n values used in our model are reasonable. Recommendations We recommend installing one of the following culvert configurations at the five roadway crossings: 1. Two 48-inch RCP culverts 2. Two 58.5 x 36 inch reinforced concrete pipe arch (RCPA) culverts 3. One 88 x 54 inch RCPA culvert With the exception of road crossings, we also recommend keeping the stream. corridor in a natural condition free from obstruction (e.g. buildings and constructed fill other than road crossings}. Although no floodplain is officially designated for Baxter Creels within the subdivision area, all floodplain regulations contained in the City of Bozeman Zoning Ordinance should be followed. For residential strictures within the floodplain, section 18.44.270.0 of the City of Bozeman Zoning Ordinance states that "The New construction, alterations, and substantial improvements of residential structures including manufactured homes must be constructed on suitable fill such that the lowest floor elevation (including basement) is tN7,10 feet or more above the base flood elevation. The suitable Fill shall be at all elevation no lower than the base flood elevation and shall extend for at least fifteen feet, at that elevation, beyond the structurc(s) in all directions." Section 18.44.270.D goes on to say, "The new construction, alteration, and substantial improvement of commercial and industrial stnuctures can be constricted on suitable rill as Allied Engineering Smiccs, Inc. Page ]l Bob Murray Februarv.1,2002 Project 00-185 specified in subsection C of this section. If not constructed on rill, commercial and industrial structures must be adequately flood proofed to an elevation no lower than two feet Above the base flood elevation." At a minimum, we recommend that structures adjacent to the stream corridor regardless of whether they are in the base flood area (see Figure 4) be constricted as outlined above and in the zoning ordinance. Please give us a call if you have any questions or require additional information. Sincerely, Allied Engineering Services, Inc. Paul J. Sanford, PE v Doug--Q S. Charldler, PhD, PE Civil Engineer Principal enc: Copy of Letter from Craig E. Brawner, P.E., Foriner City Engineer Appendix A —Hydrology Notes USGS Method Rational Mcthod SCS Method Appendix D - MDT Hydrologic Analysis for culvert conveying Baxter Creels under Huffine Lane Appendix C —MRCS Soils Information .Appendix D—HEC-RAS Output Summary of Calculated Results Profile View Cross Sections cc: Chuck I-Iinesley S'\Pr0iW5L000\00-185 Laurel Glen SublHydrology-Hydraulics\Flood Hazard Reporl.doc Allied Engineering Services, Inc. — Page 12 Bob Murray Project:00-185 Pebruaiy 4,2002 REFERENCES An-ny Corps of Engineers, (1997). "H..EC-k4S River tlnalysis System--Hydraulic Referelzee Manual". Davis, California. Chow, V.T., (1959). "Open—Channel Hydraulics". McGraw-Hill, Inc., New York, New York, Om.ang, R.J., (1992). "Analysis of the Magnitude and Frequency of Floods and the Peak-Flow Gaging Netivork in Montana: U.S. Geological Survey Water-Resources Investigations Report 92-4048". Thomas, Dean & Hoskins, Inc., (1982). "Bozeman Stornnvater Maste)-Plan for the Cit),of BOZe)77a17, Montana". AWed Engineering Senices, Inc. Page 13 THE CITY OF BOZEMAN }1 ,zrl 20 E. OLIVE o P.O. 13OX 1230 Ict,., t.•:,Y � 13OZEMAN, MONTANA 5 9771-1 230 ENGINEERING DEPARTMENT jN CEO � J PI 10NE; (QOG) 582-2380 o FAX' (40G) 582-23G3 Paul J. Sanford, P.E. Allied Engineering Services, Inc. 32 Discovery Drive Bozeman, MT 59713 Re: Laurel Glen Subdivision Flood Hazard Evaluation Dear Paul; As we recently discussed on the telephone, Baxter Creek's historical drainage basin up gradient of the subject property is indeed less than the 25 square mile threshold referenced in our subdivision code. However, the Farmers Canal collects drainage from a very large portion of the up gradient Gallatin Valley between Bozeman and it's Gallatin River in take. Baxter Creek is routinely used by the Farmers Canal Company during flood events as a "blow-off' drainage for significant runoff flows it recieves. Thus, the effective drainage for Baxter Creek can be significant and it is therefore important that the hydraulic and topographical characteristics of the subject site be assessed and addressed in the development of the subject site. As such, please expect that City Staff will ask that the hydraulic profile and limits of impact of a '100 year equivalent event be provided with the subdivision submittal. Pursuant to the City's Subdivision Code and in that the fay-out of lots and other improvements may be impacted by the flood limits of impact, the assessment needs to be completed and provided with the preliminary plat submittal. Please contact me if you have any other questions. Sincerely, Craig Jai E. Brawner, P.E. City Engineer cc Planning Department Project File ERF HOME OF MONTANA STATE UNIVERSITY GATEWAY TO YELLOWSTONE PARK APPENDIXA ydrology Notes for US(GS- Avieth,od Rational Method 8CS Me%Alt'l god US ,8- _r�.Il<eth,od BAXTBR ---------------------- National Flood Frequency Program ---------------- Flood Peak Discharges, in cubic feet per second Date: 10/22/2001 15:05 Basin: Baxter Creek, Montana Consult the log file for the input data. Recurrence Interval, years 2 5 10 25 50 100 500 -••---- ------ ------ ------ ------ ------ ------ Rural 16 57 107 196 294 422 842 Page 1 Nationwide Siummary of U.S. Geological Survey Regional Regression Equations for Estimating MagniWde and, Frequency of Floods for Ungaged Sites, 1993 Compiled By M.E. ,Jennings, W.O. Thomas, Jr., and H.C. Riggs tM�Nr oa r U.S. GEOLOGICAL SURVEY vc ' p Water-Resources Investigations Report 94-4002 A Q�cit� 1e Prepared in cooperation with the FEDERAL HIGHWAY ADMINISTRATION and the FEDERAL. EMERGENCY MANAGEMENT AGENCY Reston, Virginia 1994 o STATEWIDE RURAL Northwest-Foothills Region Q2 = 0.653A0-49 (E/1000)2.60 Summary Q5 = 3.70A0.48 (E/i00o)2.22 Q10 = 8.30A0•47 (E/1000)2.111 Montana is divided into eight hydrologic regions Q25 = 20.3A0.46(E/1000)1.9s (fig. 1). The regression equations developed for these Q50 = 47.7A0.47 (EI1000)1.62 regions are for estimating peak discharges (QT)having Q100= 79.8A0.48 (E/1000)1 10 recurrence intervals T that range from 2 to.500 years. Q500= 344A0.50 ( /1000)0.98 The explanatory basin variables used in the equations are drainage area (A), in square miles; mean annual precipitation (P), in inches; basin high elevation index Northeast Plains Region (HE+10),which is the percentage of the total basin area above 6000 feet, plus 10;and mean basin elevation(E), Q2 = 15.4AU.6`�(E/1000) 0.39 in feet, divided by 1000 (E/1000). The constant 10 is Q5 = 77.OA065 (E/1000)-0.71 added to HE and E is divided by 1000 in the computer Q10 = 161A0.63 (E/1000)-1.14 application of the regression equation. The user should Q25 = 343Ao.61 (E/1000)-1.00 enter the actual values of HE and E. The variable P is QSO = 543Ao.61 (E/1000)-1.09 taken from a map developed by the U.S. Soil Conner- Q100= 818A0.59 (E/1000)-1.19 vation Service(1980).The other variables can be mea- sured from topographic maps. The regression Q500= 1,720A0S7 (E/1000) 1'37 equations were developed from peak-discharge records available as of 1988 for 476 stations in Montana and 46 East-Central Plains Region stations in adjacent states and Canada. The regression equations apply to unregulated streams having a drain- Qo = 14 1 A0.55 (E/1000) 1.88 age area ranging from 0.04 to 2,554 square miles, but QS = 509A0.53 (E11000)"1.92 are not valid where unique topographic or geologic fea- 0 52 1 88 Lures affect floods.The standard errors of prediction of Q 10 = 911 Ao 50(E/1000)-1 79 the equations range from 22 to 128 percent.The report Q2S = 1,545A (E/1000)" 50 = 2,10OA0 49 E11000 -1.72 by Omano(1992)includes graphs of flood characteris- Q ( ) tics along seven major streams, and a table showing Q100= 2,260A0.49 (E/1000)'1.62 basin and flood charactestics and maximum (foods of Q500= 3,930A0.47 ri (E/1000)"1.44 record at gaging stations. Southeast Plains Region Procedure Q2 = 537Aa.ss (EI1000)-2.91 Topographic maps, the hydrologic regions map Q5 = 1,350A0'S3 (E/1000)-2'75 (fig. 1), the mean annual precipitation map in U.S.Soil Q10 = 2,OSOAU.52(E/lOUO)"2.64 Conservation Service (1980), and the following equa- Q 25 = 3,240A0-51 E/1000)-2.55 tions are used to estimate the 000)-2.47 needed peak discharges Q50 = 4,140A0.50 (F./10 QT, in cubic feet per second, having selected recur- Q100= 5,850A0.50 (E/10}"2.51 rence intervals T. Q500= 8,25OA0.49 (E/1000)-2.33 MONTANA 101 115 a 104 e 49 1 I o(. tt `J 1 ri lai s 0 so 100 PAILGS I--i I I o so 100 YJLOMETEHS EXPLANATION 0191101 erase from U.S.Geologlcnl Survey 1:2.000.000,1970 Regional boundary Alters equal•ama pro�cctlon based on standard pnrallels 29.G and 4S.5 degrees West Region Figure 1. Flood-frequency region map for Montana. MONTANA 103 do nl,a I-He th o d& 8 CS M- a ith,o d N O o � O u N O b d N V ID lY � cy ZZ 3 ry o O N u oG n 1D d � 3 N dy C U W v g o v o c f] c � O _ FQ- fY N N � N � F � N U u � V 7 N C � m � u 9 x V O o `o r N � a � U V u O A a n.9 � d v N$ o w a u m w cr- CV i N J O � _ y N J H _ 4 - "- N Q I O -- Z j —� 0 a to ca w cU cr7 cD Lij > o c� x x x x x x OD (D CV 'T, CO N a z m ,n (p P- a� o U cow z O O O 0 O - _ if It II 11 it 71 H 11 Z f- Z c u% 00 i D j Z ,a a a a a Q Q w w w w w w Z N W U i O In 0 0 — 0 t i a � �' too w In p F— O -- a CD w fr_ J i I I 0 LL I --- - m Z ,h ;7 s i �4 :j • ... ,•i . C .E V oar s ;a 01 ! SHV3A NI kON3noj&3 -l1vjNlva I ° to x O ,,� 6nOH dad S3HON1 NI AIISN31NI -l-IVJNIV8 r y:.;: •. iV § $ k ` u d ) � _ \ \ 7 ! . 2§ § z k § - \ \ § / k\ 0 z § � { 7 k § o � \ � ■ �■,I} { ^ 3 � � - 2 $ § aJ a ek°�>� E ■ � - - K %�} � ) Ra 0 au ; ƒ a ; SCS Curve Number Method (continued) G Runoff Factor Z Crop residue cover applies only if residue is on at ]east 5% of the (continued) surface throughout the year. 3Hydrologic condition is based on a combination of factors that affect infiltration and runoff, including (a) density and canopy of vegetative areas, (b) amount of year-round cover, (c) amount of grass or closed- seeded legumes in rotations, (d) percent of residue cover on the land surface (good > 2017o), and (e) degree of roughness. Poor: Factors impair infiltration and tend to increase runoff. Good: Factors encourage average and better than average Mltra- tion and tend to decrease runoff. Row crops are typically sugar beets and corn,whereas wheat,oats and barley would be classified as small grain. Table 7-10 Other Agricultural Lands' Cover description Curve numbers for hydrologic soil group Cover type Hydrologic A B C D condition Pasture, grassland, or Poor 68 79 86 89 1 5 range-continuous forage Fair 49 69 79 84 for grazing' Good 39 61 74 80 Meadow--continuous grass, -- 30 58 71 78 protected from grazing and generally mowed for hay Brush--brush-weed-grass Poor 48 67 77 83 mixture with brush the Fair 35 56 70 77 major element3 Good 430 48 65 73 Woods--grass combination Poor 57 73 82 86 (orchard or tree farms Fair 43 65 76 82 Good 32 58 72 79 Woods' Poor 45 66 77 83 Fair 36 60 73 79 Good 430 55 70 77 Farmsteads--buildizzgs, -- 59 74 82 86 lanes,driveways, and surrounding lots f:) 7 - 66 .A.11 PETNDIIX B MD T 1-1-yd,rologic Anmlysi5 fwr (culvert ( on veying Razter (crecli- -C n f cr Jb-,h ff,c Zane STPI' So �2. 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W N.p 0 VI r "r Y m j O m M [- ro C p - d NPIs-•yW-�O-�VIW IN.O - 0 0 I Or 1 O VI.p N O.O O 0 0 0 V1 O O � �N co w N 0 •O W NV P N)PO-+.pOP `^ 1 Q L > { r 000000000x00000000000��M) '%j m N fV IV N(A N(Ar�7 N no-+N-•-+N W tWyp MO O O O co 0 0 0 0 al ut O.O Co•O O 00 O cm _.._.W._.�•N O N A�Z N_.•O O_.q ;N Jo r V•p Lq W•ON`0 0.O}WVNNAnf Q•. far _ _ t -�•ON PP 11 VI r- L. lN7t.[.ul Vl In VI VI O O In W VI=y VI O O O O { CJ OO 0CG OOO O\OOp Ob 0 0 OGD 00000 C3 00000 7 :L ...•___ :1: M r 41 W aP-+\ If0VP V d 0 00 0 V WI O in VI V1}0N 0 0 0 0 0 V I A•-•1.1.N W N— VI"Ix N 0•O'O 07.O n V WR�OOPOV•O O»`OOV VOV t ` N 000000000\000000 VI In VI N VI W VI W VI)Vl U W V1 Is VI I STATE PROJECT NUMBER SHEET W. MON.TANA DESIGN FLOOD EASE FLOOD 0%} OVERTOPPING FLOOD 2O (D REMARKS ` STREAM NAME SIZE!]YPE APPROX H.W.W.Ev. MAGNr=F EOVENCY H.VI.ELEV. MAGNR'UOE N.W.ELM MAGNMIDE (FLOOD OF RECORD,Qp(maxa, ETC.) F-R STATION (IF NAMED } STRUCTURE 1 1D@ (cFs.i M (F.T.1 (CF s.) (F.V (C F.S.) FREoueNr Y M I==7 3 S�.r C�rcr 6' S?4Kx 3' r lSc RCS c� 1 4707. 5 G5 4707.6 15 t C. 2 47 iG. 0 OT CIJIr =v C' R RC 2 1B0 1 ;7 is c =0 =7 it 1F 1 47 15. OT n1✓I 3 - C. 2 5 'T �,' r 1,G�55 .VCri o C= �G 19. 1 _ i cctr• sY:O (-p=FK LL" x -1 /� S5 GAP A 2C �.. oT G7_ -r 4 4210 r) GT t/,';L.'A't` - ST.4. 2ts+G0 7-- - 6 . G - L �G 6 =i `G_G 7 -- 45J Lg L.O. 5l Jil�iU' ' p v7 ^'✓Ire TT G5.25 _ { - Z650. 5 E4 C 2 45=4 5 OT =1✓ILc" 2 3CV�.iJ T {VOTES . ILW.ELEYATK)NS SHOWN ARE RASED UPON MAY FLAW ANALYSIS UNLESS NOTED IN REMARKS COLUMN. STPrUCTURE SCE OR TYPE AND RETATEO HYDRAUUC DATA MAY NOT REFLECT CHANGES MADE DUE To WH OR OT14EH CONSIDERATIONS (L£.,STOL7,PJ S-S AODEO,STRUCTURE SCE OR TY'£CHAHGED, RO?.0 GPJDE C)AANGEO DURING CONSTUCTIDN,UTC.) EXCEEDA14CE PROBA13I1JT15S �A ..,CGE LENGTH SHOWtI EGUALS THE HATER SURFACE WIDTH IN THE OPEND4G AT THE DESIGN H.W. ELL•VATION MEASURED NORIAAL TO FLOW. 25 YEAR 2 % CHANCE 50 YEAR 2 CHANCE r 100 l'F;P, 1 J CHANCE U OVERTO?Mna IS DEFINED AS FLOW OVER THE ROAO,FLOW 7-00JGH A SIGMFICAhT RELIEF SiRU--r RS 200 YEAH .5 % CHANCE OR F.C14 Ov.-R THE P:t.SIN DIVIDE WHIC7iEV-M IS LOY6A 500 YEAR .2 io CHANCE (3) PDA T FFIOSE CROSSINGS NOTh-D BY OFimaC IN THE REIAARKS LJ-JMN GY'erni PPtN3 DOES N CT OCCUR ANC- :I� FLOOD MAG.WWOE USTcD CORRESPONDS TO THE FLOOD -w OP SECTION 6 ,.,.z lei(II(R OF FEDEFA!-.4G POLICY GJIOF-SUBCVLXY ER G,PART F60.SUBPART A (OEC 1371; THE FLOOD SPECIFIED IS SU6JECT TO STA T-OF-TtiE J RT CAFA31_;^l 70 £STIN.A'+E THE EXCEEDl,4Ct PF,-^U fl;Lfi Y. B 0 2 E'1\d1 AN — FOUR CORNERS I PIPES 0.6%;BRIDGE ;xy Y Q' A FEGH WATER ELEVATIONS MAY VARY S s HTLY DEPENDING UPON THE FIDE 0.°TTON SELE•C RFD. F ! I lU �JA dt'_�',�"�11�'I�,�I lrf 1 6t!PIA, States November 3, 2001 inent of Agriculture Natural Resources Conservation Paul Sanford Service Allied)rRg)11C01'IRe 3710 Fallon Street 11 B Dear Mr.Sanford, Bozeman,'MT 59718 Enclosed please find the soils information you requested for the area surrounding Aajker and Baxter Creeks. Please note that Montana NRCS policy requires that we ask you to include the following statement on all documents associmed with in analysis or determination completed using NRCS's soils data or map information: This map and associated information are to be used as a primary reference source and are not intended for use in site-specific planning.This is public information and may be interpreted by ormillizations, agencies, units of government,or others based on needs;however, they are responsible For the appropriate application. Federal,state,or local regulatory bodies are not to reassign to the USDA Natural Resources Conservation Service(NRCS)any authority for the decisions they make. If you have any questions related to this information you may contact me at 522-4016.Thank you for your cooperation and for your interest in the Gallatin County Soil Survey. Sincerely, J Katie Alvin Natwral Resource Planner Gallatin Conservation District Enclosures The Natural Resources Coosorvalton Servica works hand-in-hand with the American people to conserve natural resources on private lands. AN FOUAI.OPPORTUNITY EMPLOYER U.S. DEPARTMENT OF AGRICULTURE PAGE 1 OF 3 ."'%TURAL RESOURCES CONSERVATION SERVICE 11/8/01 WATER FEATURES All Planning Flooding I High water table and ponding I i I Map symbol (Hydro-1 I ! I Water I I I I Maximum and soil name ilogic I Frequency I Duration I Months I table I Kind of ( Months I Ponding I ponding Is—up I I I I depth Iwater table! ! duration I depth I I I ! I Ft I ( I I Ft 44eA+ I I I I ! I I I ! Hyalite---------1 B I I - - ! - - 14.0-8.0 (Apparent I May-Aug I --- ( -- I I I I I I I I I Beaverton-------1 B I -- I --- I --- 1 4.0-8.0 (Apparent I May-Aug I --- I --- I ! I I I I I I I 4s3B: I I I I I ! I I I Amsterdam-------I B ! •- I - I - I -- I --- I - I - I - I Quagle----------I B I 1 1 I I 1 I I I 4s7A: I I I I ! ! I I I ----------I e 1 - I --- I - - 1 4.0-0.0 (Apparent I May-Aug -- I' I I I I I I ! I I .di Enbar----------•I B IRare (Brief I JAN-JUL 12.0-3.S (Apparent I Apr-Jul I - I '-- I I I I I I I I I sloe: I I I I I I I ( I Meadowcreek-----I C I -- I -- ! -- 12.0-3.5 (Apparent I Apr-Jun -- I I I I I I I 1 I s37A: Lamoose---------I D I -- I --- ! --- 1 1.0-2.0 (Apparent I Apr-Jul I --- I --- 1 542A: I I I I I ! I ! ! Blossberg-------I C I --- I •-- ! -- 1 1.0-2.0 (Apparent I Apr-Jul --- I I ! I I I I ! I 748A: I I I ! I I I ! I Hyalite---------I B I --- I -•- I - - I - I --- ! •-- I --- 1 --- I I I I I I I I I Beaverton-------I B •-- I .. DEPARTMENT OF ACR-TCULTURE PAGE 2 OF 3 'URAI, RESOURCES CONSERVATION SERVICE 11/0/01 WATER FEATURES Inotc -- WATCR FEATURES .s report gives estimates of various soil water features. The estimates are used in land uce planning that involve, lincering considerations. lrologic soil groups are used to estimate runoff from precipitation. Soils not protected by vegetation are iignod to one of lour groups. They are grouped according to the infiltration of water when the soils are thoroughly and receive precipitation Crom long-duration sr-orms. The four hydrologic soil groups are: Group " A". Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands.. These soils have a high rate of water transmission. Grcun "D". Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderacr_ly fine texture to moderately coarse texture. These soils hnve a moderate race of water transmission. cup "C". Soils having a slow infiltration rate when noroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately Eine texture or fine texture. These soils have a slow rate of water transmission. Group "D". Soils having a very slow infiltration rate (high runoff potential) when choroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a permanent high water table, soils chat have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious maL-erial. These soils have a very slaw rate of water transmission. a soil is assigned to two hydrologic groups in this report, the first letter is for drained areas and the second for undra'_ned areas. Flooding, the temporary inundation of an area, is caused by overClowing streams, by runoff from jacent slopes, or by L'ides. Wacer standing for short periods after rainfall or snowmelt 1s not considered coding, nor is water in swamps and marshes. This report gives the frequency and duration of flooding and time of year when flooding is most likely. Frequency, duration, and probable dates of occurrence are estimated. ;quency is expressed as "None", "Rare", "Occasional", and "Frequent". "None" means that flooding is not probable; are" that it is unlikely bet possible under unusual weather conditions; "occasional" that it occurs, on the arage, once or less in 2 years; and "Frequent" that it occurs, on the average, more than once in 2 yearn. ration is expressed as "Very brief" if less than 2 days. "Brief" if 2 to 7 days, "Long" if 7 to 30 days, and "Very zo ore than 30 clays. The information it, hared on evidence in the soil profile. namely thin strata of gravel, or clay deposited 1>y floodwater; irregular decrease in organic matter content with increasing depth; ice of distinctive horizons that form in soils that are nor subject to flooding. Also considered are local formation about, the extent and levels of flooding and the relation of each soil on the landscape to historic Cloods. U.S. DEPARTMENT OF AGRICULTURE PAGE 3 OF 3 `URAL RESOURCES CONS ERVATIOGr SERVICE 11/8/01 WATER FEATURES Sndnote -• DATER FEATURES--Continued Information on the extent or flooding based on coil data is lens specific than that provided by detailed engineering surveys that dalineate flood-prone areas at specific flood frequency levels. Higl-, water table (seasonal) is the highest level of a saturated zone in the soil in most years. The depth to a seasonal high water table applies to undrained soils. The ecLrmates are based mainly on the evidence of a maturated zone, namely grayish colors or mottlee, in the soil. Indicated in this report are the depth to the seasonal high water table; the kind of water tat-le, that is, "Apparent", 'Artesian", or "Perched"; and the months of the year that the water Lable comunonly is high. A water table that in seasonally high for less than 1 month is not indicated in this report. An "Apparent" water table is a thick zone of free water in the soil. It is indicated by the level at which water stands in an uncased borehole aftrBr adequate time is allowed for adjustmenL in the surrounding soil. An "Artesian" water table existn under a hydrostatic beneath an impermeable layer. when the impermcable layer has been penetrated by a cased borehole, the water rises. The final level of the water in the cased borehole is characterized as an artesian water table. "Perched" water table is water standing above an unsaturated zone. In places an upper, or "Perched". water is Separated from a lower one by a dry zone_. Only saturated zones within a depth of about 6 feet are iced. Ponding is standing water in a closed depression. The water is removed only by deep percolation, transpiration, evaporation, or a combination of these processes. This report gives the depth and duration of pending and the time of year where ponding is most likely. Depth, duration, and probable dates of occurrence are estimated_ Depth is expressed as the depth of ponded water in feet above the soil surface. Duration is expressed as "Very brief" if less than 2 days, "grief" if 2 to 7 days, "Long" if 7 to 10 days, and "Very long" it more than 30 days. The information in based on the relation of each soil on the landscape to hintoric ponding and on local information about the extent and levels of ponding. 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DATED FEBRUARY 4, 2002. _ LUT 'I LGI 2 LOT � ;'; a I J/ I f / ,-e: e: e' e• e• e: e: d•I I oau,k.n —a7ae- M n oo e E m e I LOT 16 0 eY I- dI I If 1 0 ode o: ova oe ors^I I I LOT 1 ad Jd Jdo J d Jdb Joe Jud Jno Jno I 1 �` I l� I� Jp 1----- --- --- --- --- --- --- --- ---J I - ass _ LGT 7 - 1 1 / I GL.;V i0D DP,II•L - -— '_j - ( Tm --- --- --- ----1I1 LOT 20 n In e E m e E n:: 60 e: m e a+o�J1 rit! 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