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HomeMy WebLinkAbout02 - Design Report - Laurel Glen Ph 1 - Roadn n 0 ROAD DESIGN REPORT A. General c The primary access to the Laurel Glen Development is Durston Road. Durston is an east- west arterial, approaches the development from an intersection with North 19th Avenue three miles east of the property. The project will include right-of-way dedications for all interior streets, Durston Road and Oak Street. See Figure 2 for the layout of the roads within the subdivision and the arterials connecting the project. The following references were used in the road design: a. COB Design Standards and Specifications Guide, 2001 b. COB Modifications to Montana Public Works Standard Specifications (MPWSS) c. City Subdivision Regulations d. City adopted MPWSS and Adopted Addenda e. AASHTO Policy on Geometric Design of Highways and Streets f. Bozeman Transportation Plan g. Americans with Disabilities Act B. Major Roads Durston Road At full build out, Durston Road will be constmcted from the west property line to the intersection of Cottonwood Road to a City of Bozeman Arterial Standard consisting of a three lane section, including a center left hand turn lane, two travel lanes, bike lanes, curb and gutter, boulevards, sidewalks, storm drainage, landscaping, and lighting. For Phase I Durston Road will be improved from the west property line to Laurel Parkway consisting of two travel lanes and a bike lane with curb and gutter, boulevard and sidewalk on the northern side of the roadway. The curb line will be constructed inline with the future full section (See Figure 1). A road side ditch will be constmcted on the south side of the road. The street crown will be constmcted at the location of the full street section. A 28-foot wide paved section will be constructed during Phase I from Laurel Parkway to Cottonwood Road. The section will be constructed for future widening to full arterial section. All stream and drainage swale culverts, as well as utilities, will be installed during the construction of Phase I in Durston Road. Additional street improvements will be completed during future phases on the north side of the road, adjacent to Laurel Glen, as constructed during Phase I. No street improvements other than as outlined above are proposed for Durston Road west of the property. The horizontal and vertical design elements meet a 50 mph AASHTO design speed. Access to Durston Road from intersecting streets will be controlled by stop signs and stop bars and sufficient sight distance will allow for the safe entrance of vehicles onto Durston Road. 1 n n 0 The transition at the westerly end of the subdivision will require the design of an S-curve requiring superelevation of the road. This transition will also require a taper from full roadway width to an existing 22-foot wide gravel road. To create a more aesthetically pleasing landscaped boulevard, the sidewalk will meander with curves on both sides of Durston Road within the right-of-way rather than being a straight parallel offset from the road. Durston Road will have a 90-foot dedicated right-of-way for the length of full roadway improvements and a 75-foot right-of-way east of the subdivision due to exiting right of way. Oak Street The applicant plans to dedicate sixty-feet of right-of-way along the site's north boundary for the constmction of the south side of Oak Street. The intent of this right-of-way dedication is to constmct the southern half of the roadway as a 28-foot paved width (two fourteen-foot driving lanes and two-foot curb and gutter on each side) centered 30-feet from the north boundary of the 60-foot dedication. In the future, this typical road section could be mirrored north of the site to provide a four-lane, divided roadway with a 28-foot median, all within a 120-foot right-of-way. Until traffic counts find it necessary for additional lanes. Oak Street will be used for two-way traffic to access Lionheart Lane, Laurel Parkway, and Forestglen Drive. Sidewalk will be constructed one-foot to the north of the northerly property line with an eight-foot boulevard between the sidewalk and curb and gutter. The entire paved section will be crowned three percent to the south and the future north side will be crowned three percent to the north to allow for drainage. Oak Street construction will take place during future phases of the project. Laurel Parkway Laurel Parkway is a designated as a minor collector extending north-south connecting Oak Street to Durston Road. It will have a 90-foot dedicated right-of-way. Laurel Parkway will have a twelve-foot driving lane and a five-foot bike lane and is divided in the center with a 26-foot wide median and left turn lanes. Five foot wide sidewalk will be constructed one-foot from the property line with an eight-foot wide boulevard. Roundabouts will be constmcted to control traffic at the intersections with Annie Street and Glenellen Drive. See Figure 4 & 5 for the roundabout design. Laurel Parkway will be constructed from Durston Road to the intersection with Glenellen Road during Phase I and the remainder will be constructed during Phase II. u 2 n 0 r' Annie Street Annie Street will run east to west through the entire project and will have dead end barricades constructed at the east and west property lines. It will have a 74-foot dedicated right-of-way. There will be two eleven-foot driving lanes, a five-foot bike lane, and a seven-foot parking lane. The parking lanes on both sides include two-feet of curb and gutter. The westerly portion of Annie Street will be constructed during Phase I, and the remaining half on the east will be constructed during future phases. C. Local Interior Roads Approximately 5.3 miles of dedicated interior roads will be constmcted in sequence with the proposed phasing of the project (See Figure 2). All dedicated interior roads will have a 60-foot right-of-way with curb and gutter, sidewalk and boulevard. Sixteen dedicated roads will service the site's interior, as listed below: Brookside Lane Glenellen Drive Crossbow Court Shadowglen Drive Loxley Drive Saxon Way D. Design Criteria Glenwood Drive Sherwood Way Woodbridge Drive Westgate Avenue Longbow Lane Forestglen Drive Immanuel Way Broadsword Way Momingstar Lane Gail Court All roads within the Laurel Glen Subdivision will be designed and constructed according to the City of Bozeman Design Standards, AASHTO Policy on Geometric Design of Highways and Streets, City of Bozeman Modifications to Montana Public Works, Montana Public Works Standards, Americans with Disabilities Act, and the Bozeman Transportation Plan. Roadway typical sections conform to the City of Bozeman Standards and the Bozeman Transportation Plan. Figure 1 shows the typical section of each major road and the local interior roads. The section of each road will consist oftwenty-four inches of pit run base course material, three-inches of road mix top course material, and three-inches of asphalt pavement. The geotechnical report is included in Appendix A and outlines the criteria used to determine the road section thickness. 3 n n n u Concrete sidewalk will be constructed on both sides of every road within the project and will be five foot wide and be located one-foot within the right-of-way. Sidewalks will be six-inches thick across driveways and four-inches thick elsewhere. Sidewalk location will vary around the roundabout intersections. Integral curb and gutter will be used on all roadways. Spill curb will be used to line the medians and the north side of Oak Street. Pedestrian ramps to ADA standards shall be installed at all intersections and at certain mid-block locations. The crown on all roads in the subdivision, except intersections, will have a three percent crown as measured from centerline to lip of curb, or lip of median curb to lip of outside curb on roadways with raised center islands. Road profile tangent grades will be a minimum ofone-half(0.5) percent. Intersections were designed such that the crown of a side street transitions into the edge profile grade of the through street. Temporary erosion control and dead end barricades will be placed at the ends of all roadways that are not completed due to project phasing, subdivision boundaries, etc. Curb return radii at intersections will be 15-foot on local roads and 25-foot on major road and minor roads intersecting with major roads. The curb radius will be measured from top back of curb. Street identification signs will be installed at all new intersections. Stop signs will be installed on local streets where they intersect with a collector or arterial street. Durston Road will require pavement markings designating the two travel lanes, center turn lane, and bike lanes and appropriate markings at each transition back to the existing road. Laurel Parkway and Annie Street will require pavement markings designating bike travel lanes. Local streets will require stop bars at all intersections with arterials and collectors. All pavement markings shall be in accordance with the City of Bozeman Design Standards and the Manual on Uniform Traffic Control Devices. Lighting will be required at intersections of all roads with Laurel Parkway, Durston Road and Oak Street. Lighting shall be designed in accordance with the "American National Standard Practice for Roadway Lighting" (ANSI/IESNA RP-8-00). Modem Roundabouts Modem roundabouts will be used at the intersection of Laurel Parkway and Annie Street and the intersection of Laurel Parkway and Glenellen Drive. The key concepts of the modem roundabout intersection include: yield control of entering traffic; channelized 4 n n approaches; counterclockwise circulation; and geometric curvature design to slow the speed of traffic. The design of the roundabouts is based on criteria specified in the manual "Roundabouts: An Informational Guide" prepared by the U.S. Department of Transportation Federal Highway Administration (FHWA). See Figures 3 and 4 for the layout of the modem roundabouts. The Laurel Parkway roundabout design elements are based on an urban single lane site category. The recommended maximum entry design speed is 20 mph. The inscribed circle (outer) diameter is 130 feet. The circulatory roadway width is 18 feet to accommodate a school bus, which requires a minimum curves lane width of 17.6 feet. A concrete apron will be constmcted behind a mountable curb on the central island to accommodate vehicles with a required minimum curved lane width of greater than 18 feet. The combined width of the circulatory roadway and the concrete apron is 30-feet which is adequate for the design vehicle, a WB-50 vehicle (semi tmck and trailer). A two percent outward cross slope is provided, rather than the City of Bozeman Standard three percent, since traffic is traveling on a negative superelevation through the roundabout. Pedestrian traffic is accommodated with sufficient sidewalks, ramps, crosswalks, and signing to allow safe passage around the roundabout. Since the bike lane temiinates 100 feet prior to the roundabout, cyclists have the option to merge into vehicle traffic or utilize the safety of the sidewalk as a pedestrian to travel around the roundabout. Pavement markings and signing will follow the guidelines presented in the above referenced FHWA roundabout document. The landscaped boulevard between the sidewalk and the roadway provides a buffer to discourage sight impaired individuals from crossing at locations other than the crosswalk. Textured concrete will be used at the crosswalks but not at the bike lane entry/exit ramps to discourage sight impaired individuals from trying to cross at the bike lane entry/exit ramps. The splitter islands and curb ramps will be demarcated with detectable warnings 24 inches wide at each street/sidewalk edge. D. Future Development of Roads Existing topography 200-feet beyond the limits of design was looked at to assure that future extension of dead end roads was feasible. The roads under this category consist of Annie Street, Glenellen Drive, Glenwood Drive, Sherwood Way and Oak Street. Existing topography shows that future extension of these roads is permissible. Grades are less than two percent and soil conditions appear consistent with that on the Laurel Glen Subdivision site. See Figures 5-8 for conceptual designs. E. Traffic Generation and Capacities A traffic impact analysis study was performed for the project by Robert Peccia and Associates and is included as Appendix C. The traffic study showed that the development will impact several intersections. The following impacts were identified as stated in the study: 5 r\ n 1- The intersection of Laurel Parkway and Durston Road will function adequately until the background traffic on Durston Road reaches 5,OOOVPD. At this point some type of traffic control will be needed at this intersection. If Oak Street is extended to connect to the proposed development site then the intersection of Laurel Parkway and Durston Road will function adequately until the background traffic on Durston Road reaches 10,000 VPD. 2- The intersection of Cottonwood Road and Huffine Lane will require signalization by the year 2003. 3- By the year 2010, the traffic from the proposed development will account for 50% of the new traffic at the Cottonwood Road/Huffine Lane intersection. 4- The intersection of Cottonwood Road and Durston Road will fall to LOS F by the year 2008 with the current traffic control configuration. 5- The two roundabouts within the development should function adequately with the anticipated traffic volumes. The following recommendations were provided in the study so that the development functions with minimal impacts on the road system in the area. 1- All intersections within the development should be controlled by STOP signs on the minor street approaches. 2- Provide marked pedestrian crossings at all major intersections. 3- The roundabouts should be designed to provide pedestrian and bicycle facilities and adequate room for large vehicles (WB-50). 4- Provide left- and right-tum lanes for vehicles turning from Laurel Parkway onto Durston Road. 5- The developers should help with the installation of the traffic signal at Huffine Lane and Cottonwood Road. F. Conclusion All roadways within the proposed Laurel Glen Subdivision and Durston Road will be designed and constmcted to the City ofBozeman Design Standards. 6 i r r". I 60' ROW- —1.9.0' 0' DRIVING 7.0' PARKING 1.0' 5.0' 7.5' 7.0' 9.0' 7.5' 5.0'^ \—0.5' 0.5'— J- 7 t/^. 3% 3% 3% 3% 3:^^ LOCAL STREETS -90' ROW 1.0'—| I— —1.0' 13.0' TURNING LANE OR MEDIAN 12.0' DRIVING 5.0' BIKE 5.0' 8.0' 5.0' 12.0' 1.3.0' 8.0' 5.0' —0.5' —0.5' 0.5' J; ^5A-. 3% 3% 3% 3% LAUREL PARKWAY 3- ^^-. 1.0'- (. ^.-7 ^. L-5.0'- -7.5'- -7.0'- —0.5' 3% -5.0'- -74' ROW- -11.0'- 11.0' DRIVING ANNIE STREET _5.0'_ BIKE 7.0' PARKING 0.5'—i -7.5-- -5.0'-) —1.0' ^.•7 ^6^. 1.0-—| •\ ^-^ |-5.0-- s/w 60" ROW SOUTH SIDE 16.0' DRIVING 16.0' OAK STREET OAK STREET r I.............. CROSSBOW COURT SAXON7 WAY BROADSWORD WAY p< rt 3 5 SHERWOOD WAY w ! B: z IS: ! 3 I ^ GLENELLEN DRIVE ^ --! f- w « u Q i— 2 GLENELLEN DRI^ z EC > c < 0 ^ 0 ^ r-^ 0 ANNIE STREET ANNIE STREET > u — ei' Q z 151 •1c I ? t V b IMMANUAL WAY m c. z ;>< I I 5 ' ^ ^ f ^ s: ; (d i —• _' lg r- GAIL DRIVE ^ / s3 ^ ^1— / ^ ^ £ j 3 i J^L_ GLENWOOD DRIVE g GLENWOOD DRIVE Pi b s w 0 J. z M > ! <: SHADOW GLEN DRIVE K r / \ 3.50 5.00' (TYP.) ^-r \ 26.00' 12.00' 50-j / / / / R3.00' A 12.00 R2.00'-] \ / 10.00' R3.00' (TYP.) II \ ^R^50= R3.00'- 6.46' ~\ R3.00' 8.00' (TYP.) / \ R 4.00' ......4 / \ 17.00' / \ 2i.ar 22.79' 12.26' / \ R90.00' //1Z.51' R90.00' / R5.00' / \ \ /. R1.50' / / DETAIL SPLITTER ISLAND ON GLENELLEN STREET SCALE: 1" - 20' DETAIL TYPICAL SPLITTER ISLAND ON LAUREL PARKWAY SCALE: 1" = 20' '14.76' v 0.00' 18.00' -4 % -0 f' /..-,. 1_-:ZLT. - / \ 9.00' '!/ R65. 5.50' \ ~T R .34.50' ..^=---"-/ ENTRY CURVE T-9.00 R70.00' (TYP.) 0 10.00' \ 14.46' t YIELD LINE EXIT CURVE R90.00' (TW.) T :s s -i a I NO. REVISIONS DRAWN BY DATE 0 20 40 60 LAUREL GLEN SUBDIVISION - PHASE I PROJECT If: 00-185 ROUNDABOUT DETAIL - LAUREL & GLENELLEN BOZEMAN, MONTANA Civil Engineering Land Surveying Geotechnical Engineering Structural Engineering r ^5.00' (TYP.) / -<^ —3.50 / \ / / 12.00' .50' \ 26.00' \ /- \ / R3.00' /\ 12.00 / \rR1-50i / R3.00' (PIT',) R5.DO· ^ ^^ 10.00 N 10.00' /L-J 20.99' 17.00' 8.00' (Tff>.) I \ 14.42' R3.00' I-R5.00' -/ 12.22.79' /2.5r 26' \ v R90.00' R90.00'/ / \ R5.00' / R1.50' \ \ / DETAIL TYPICAL SPLITTER ISLAND ON ANNIE STREET ?^ DETAIL SCALE: 20 - y T-iiTICAL SPLITTER ISLAND ON LAUREL PARKWAY SCALE: 1" - 20' 14.76' 30.00' \^ 18.00' -4 % /o ^ / \ 13.66' -p /\ ._z--—- R65.00 }--/- T c:5.00' 11.00' -3 R34.50' \ ENTRY CURVE 0 R70.00' (TYP.) YIELD LINE 10.00' 4- ^ EXIT CURVE R90.00' (Tff.) 3 II s] 1[ sl I NO. REVISIONS DRAWN BY DATE 0 20 40 60 SCALE: 1 INCH +0 FEET PROJECT ENGINEER: CGB DESIGNED BY: PJS ORAWN BY: PJS REVIEWED BY: CGB, SRS CHfttS LAUREL GLEN SUBDIVISION - PHASE I r 200' EXTENSION ^ I I \ PAST SUBDIVISION BOUNDARY T GLENELLEN DRIVE )--— M --f g § i\ r I ^ < ^ ^ 0 ; x < U2 PLAN VIEW 4770.0 4765.0 4760.0 4755.0 4750.0 4745-0 4740.0 4735.0 4730.0 4725.0 4720.0 4715.0 sls\ EXISTING GROUND 200' EXTE.NSION Pit ^i -11 si 4770.0 1^ii 's Et- ——FINISttEB-SRABf •••--?•"• tI 0.74% 4765,0 4760.0 4755.0 4750.0 4745.0 4740.0 4735.0 4730.0 4725.0 4720.0 4715.0 8 PROFILE VIEW I s s\ s II c w t5< ^ ^ 0 » u 2 0 I ^ 200' EXTENSION PAST SUBDIVISION BOUNDARY ANNIE STREET § t>< u_ Sl -I- --§1 H 3 ANNIE STREET M s +- h- 8 g 200' EXTENSION PAST SUBDIVISION BOUNDARY PLAN VIEW-WEST ANNIE PLAN VIEW-EAST ANNIE 4780.0 4775.0 4770.0 4765.0 4760.0 4755.0_ 4750.0 4745.0 4740.0 4735.0 4730.0 4725.0 4720.0 •T" EXISTING GROUND 200' EXTENSION Il Ill ""££.'1 "3| g^ ^ i"nJ II M" •FINISHED GRADE s1 4780.0 PROFILE VIEW-WEST ANNIE 4775.0 4770.0 4765.0 4760.0 4755.0 4750.0 4745.0 7 r 200' EXTENSION PAST SUBDIVISION BOUNDARY GLENWOOD DRL^E p---1 g 1^; ^ z K > < u E- u H U2 M ^ S GLENWOOD DRIVE S f-- --1 § g 200' EXTENSION PAST SUBDIVISION BOUNDARY PLAN VIEW-WEST GLE^TWOOD PLAN VIEW-EAST GLENWOOD 4780.0 4775.0 4770.0 4765.0 4760.0 ,4755.0 4750.0 4745.0 4740.0 4735.0 47.50.0 s s5 0 (a EXISTING GROUND 200' EXTENSION ^ •TO- ?tn 1 --.. ^1 _^ ss is _«.., ^ ^ L£ ^FINISHED GRADE 4780.0 PROFILE VIEW-WEST GLENWOOD 4775.0 4770.0 4765.0 4760.0 4755.0 4750.0 4745.0 r .200' EXTENSION, PAST SUBDIVISION BOUNDARY § PLAN VIEW-WEST OAK -t_OAKST^EET_____S_ g § -I) 200' EXTENSION PAST SUBDIVISION BOUNDARY t PLAN VIEW-WEST OAK 4765.0 4760.0 4755.0 4750.0 4745.0 4740.0 ^735.0 4730.0 4725.0 4720.0 4715.0 4710.0 4705.0 4700.0 cn ^ »CTNGj,ROyND., 200' EXTENSION I E °|° 5 ft T1"S~-' d ^ •FINISHEO GRADE ^ ..........CL60: PROFILE VIEW-WEST OAK +765.0 4760.0 4755.0 4750.0 4745.0 4740.0 4735.0 4730.0 4725.0 4720.0 4715.0 4710.0 4705.0 4700.0 4765.0 4760.0 4755.0 4750.0 4745.0 4740.0 4735.0 4730.0 4725.0 fp^sws^ i? ^('•'.j'n UU 2 (~' ''; ' : ?^on9 i-. "M I r^Gu~U~]^} ALLIED ENGINEERING SERVICES, INC. August 27, 2002 Bob Murray, PE Project Engineer CityofBozeman P.O. Box 1230 Bozeman,MT 59771-1230 RE: Laurel Glen Design Report Review Comment Responses J.O. 00-185 Dear Bob: Attached please find our responses to your review comments for the Laurel Glen Design Report. Please review the submitted material at your earliest convenience. If you have any questions or need additional information regarding this project please feel free to contact us at 582-0221. Sincerely, Allied Engineering Services, Inc. ^ Chris G. Budeski, PE Senior Civil Engineer enc: Laurel Glen Design Report review comments responses ec: Chuck Hinesley, Owner file S:\Projects\2000\00-185 Laurel Glen SubVDesign Report\Bob Murray Letter 08-27-02.doc 32 Discovery Drive • Bozeman, MT 59718 • (406)582-0221 • Fax(406)582-5770 '} -1 1 1 1 1 1 1 1 1 1 1 1 1 J J ] ] 1 Table 2. Summary ofLow-Level Slot Width Sensitivity Analysis. Detention Pond # Tailwater' Elevation Ke = 0.5 (feet) Tailwater2 Elevation Ke = 0.2 (feet) 1 2 0.95 0.85 0.88 0.79 Tailwater3 Elevation @ normal depth (feet) Required Slot Width Ke = 0.5 (feet) Required Slot Width Ke = 0.2 (feet) Required Slot Width @ normal depth (feet) 0.44 0.40 1.36 0.75 1.31 0.73 1.10 0.64 1 1 I 1 1 1 1 1 1 1 ] ] ] J ] ] ] ] 1 I I Durston Road. The traffic volumes we are using as the basis for our calculations are after full build-out of the Laurel Glen and Valley West subdivisions have been completed. Since we applied no growth factors to more accurately model yearly traffic volume increases, we feel our design ESAL values for these roadways are conservative. ESAL Calculation for Laurel Parkway and Annie Street Basis for design: 8,000 VPD after full subdivision build-out at Laurel Parkway/ Durston Rd. intersection (see page 9 of traffic study). Traffic per drive lane: Assume 4,000 VPD. Percentage of heavy truck traffic: According to the traffic study, 1% of east and west bound traffic at the N. 19 Ave./Durston Rd. intersection will be heavy trucks in 2010. Truck traffic per lane per day at Laurel Parkway/Durston Rd. mtersection: 40 tmcks per lane (ie. 1% x 4,000 vehicles). ESALs per truck (average): Based on previous transportation experience, we have assumed the average number ofESALs per tmck is 1.125. ESALs per day (from trucks): 45 (40 tmcks x 1.125 ESALs per truck). Total ESALs for 20-year service life (from trucks): 328,500 (ie. 45 ESALs per day x 365 days per year x 20 years). Design ESALs: Assume 350,000 for all vehicles. ESAL Calculation for Durston Road Basis for design: 11,000 VPD after full subdivision build-out and development of Valley West subdivision at Durston Rd./Cottonwood Rd. intersection, (see pages 9 and 10 of traffic study). Traffic per drive lane: Assume 5,500 VPD. Percentage of heavy truck traffic: According to the traffic study, 1% of east and west bound traffic at the N. 19 Ave./Durston Rd. intersection will be heavy tmcksin2010. Truck traffic per lane per day at Durston Rd./Cottonwood Rd. intersection: 55 tmcks per lane (ie. 1% x 5,500 vehicles). ESALs per truck (average): Based on previous fa-ansportation experience, we have assumed the average number ofESALs per tmck is 1.125. I I Page 5 of 6 1 1 1 "1 1 1 1 1 1 ] 1 1 ] 1 1 J ] j 1 ] 1 ] 1 1 ESALs per day (from trucks): 62 (55 trucks x 1.125 ESALs per tmck). Total ESALs for 20-year service life (from trucks): 452,600 (ie. 62 ESALs per day x 365 days per year x 20 years). Design ESALs: Assume 500,000 for all vehicles. Based on the same pavement design parameters that were incorporated in the original pavement recommendation for the subdivision's street improvements (see Laurel Glen geotechnical report, prepared by AESI, January 2002), we have provided two section alternatives for the subdivision's collector and arterial facilities. The first alternative is for a three-inch asphalt layer, while the second is for a four-inch layer. We recommend consideration be given to the alternatives with the four-inch asphalt layer. Design Alternatives for Laurel Parkway and Annie Street MATERIAL COMPACTED THICKNESS ON) COMPACTED THICKNESS (IN) Asphalt 3.0 4.0 Base Course Gravel 3.0 3.0 Sub-Base Course Gravel 26.0 23.0 TOTAL 32.0 30.0 Desi.gn Alternatives for Durston Road MATEMAL COMPACTED THICKNESS fIN) I COMPACTED THICKNESS ON) Asphalt 3.0 4.0 Base Course Gravel 3.0 3.0 Sub-Base Course Gravel TOTAL 28.0 34.0 24.0 31.0 I I Page 6 of 6 3 1 1 1 1 1 1 1 1 1 1 1 ] J ] J j J ] J 1 1 1 I I J-1 J-65 J-65_ / «----<- -<—s- -M^^y-— PRV-1 ^ R- I R-5. < 0 0 6 h b 0 I I I 1 ,^!£^7 '..^Ss:^.. ALLIED ENGINEERING Civil Engineering Land Surveying Geotechnical Engineering Structural Engineering 32 DISCOVERY DRJVE B02EMAN.MT 59718 PHONE (406)582-0221 f AX (406} 582-5770 FIGURE 1 DRAWN BY: WMS DATE: 8/22/02 PROJECT #: 00-185 W-MODEL 3 4 0.44 0.68 0.40 0.63 0.22 0.32 0.37 0.58 0.37 0.57 0.35 0.52 5 6 7 0.75 0.68 0.51 0.69 0.63 0.48 0.35 0.32 0.25 0.60 0.58 0.41 0.58 0.57 0.41 0.53 0.52 0.39 Tailwater used in low level weir analysis is equal to the computed headwater for the outlet culvert. The outlet culvert was calculated with an entrance loss coefficients of 0.5. Tailwater used in low level weir analysis is equal to the computed headwater for the outlet culvert. The outlet culvert was calculated with an enta-ance loss coefficients of 0.2. 3 Tailwater used in low level weir analysis is equal to the normal depth for the outlet culvert. As can be seen from Table 2, the slot width is relatively insensitive to the entrance loss coefficient used for the outlet culvert calculations. For all but detention pond #1, the slot width varied by less than 0.10 feet for the highest tailwater elevation (Ke = 0.5) and the lowest tailwater elevation (normal depth of outlet culvert). In summary, we feel that the slot widths in our report are reasonable. 9. The north system storm calculations -were made using a return frequency of 2 years. Revise for 25 years. Thank you for catching this oversight. Calculations for the Stomi Sewer System #1 North were revised using a return frequency of 25 years. The analysis determined that the pipe sizes shown on Figure 5 of the Surface Water and Stormwater Facilities Report are still adequate. Revised output sheets are included in Appendix C. Asphalt Design: 10. The ESAL value seemed to be an assumption. This is low compared to what has been used in other places for collector and arterial type facilities. Justify this number for the collector and arterial facilities using the traffic study that was done for the project. Based on the information provided in the project's Traffic Impact Analysis Report, prepared by Robert Peccia & Associates in February, 2002, we have re-calculated the ESAL values for the subdivision's collector and arterial roads assuming a 20-year design life. According to our calculations, which are detailed below. Laurel Parkway and Annie Street shall be designed for 350,000 ESALs, while 500,000 ESALs is the design value for Page 4 of 6 4720.0 4715.0 4710.0 4705.0 4700.0 !s -t ^ ^FINISHED GRADE I $ t"— g -I— —-r-r1-1-1^:-:^-^ EXISTING GROUND F200' EXTENSIW PROFILE VIEW-WEST OAK 4765.0 4760.0 4755.0 4750.0 4745.0 4740.0 4735.0 4730.0 4725.0 4720.0 4715.0 4710.0 4705.0 4700.0 Is\ al sl g| II NO. REVISIONS ORAWN BY OATE HORIZONTAL SCALE 0 30 60 1 INCH - 60 FEET VERTICAL SCALE- 10 20 INCH - 20 FEET PROJECT ENGINEER: CGB DESIGNED BY: WMS DRAWN BY: WMS REVIEWED BY: CGB LAUREL GLEN SUBDIVISION OAK STREET - 200' EAST-WEST EXTENSION BOZEMAN, MONTANA '^SSi. Lj^S ALLIED ENGINEERING SERVICES, INC. Civil Engineering Land Surveying Geotechnical Engineering Strucmral Engineering 32 DISCOVERY DRIVE BOZEMAN.MT 59718 PHONE (406) 582-0221 FAX (406) 582.5770 PROJECT #: 00-185 DATE: 2/2002 R-OAK-ext.DWG FIGURE 8 4740.0 4735.0 4730.0 4780.0 4775.0 4770.0 4765.0 4760.0 4755.0 4750.0 4735.0 4730.0 §L S;?3 p^ lul ^^ Ill 4780.0 sBNISKEBi.GRAOE— K s "CN ^ R ? I s 4745.0 v y Kg 1.11% 4740.0 y- EXISTING GROUND -ZOO'-EXTENSION— 4775.0 4770.0 _4765.0 4760.0 4755.0 4750.0 4745.0 4740.0 4735.0 4730.0 PROFILE VIEW-EAST GLENWOOD Iil II sl s| NO. REVISIONS DRAWN BY DATE t/J HORIZONTAL SCALE 0 30 60 0 VERTICAL SCALE 10 20 1 INCH - 60 FEET 1 INCH 20 FEET PROJECT ENGINEER: CGB DESIGNED BY: WMS DRAWN BY: WMS REVIEWED BY: CGB LAUREL GLEN SUBDIVISION GLENWOOD DRIVE- 2005 EAST-WEST EXTENSION BOZEMAN, MONTANA "saas, ALLIED ENGINEERING SERVICES, INC- Civil Engineering Land Surveying Geotechnical Engineering Sti-uctural Engineering 32 DISCOVERY DRJVE BOZEMAN.MT 59718 PHONE (406) 582-022] FAX (406) 582-5770 PROJECT #: 00-185 DATE: 2/2002 R-GLENWOOD-EXT.DWG FIGURE 7 4740.0 4735.0 4730.0 4720.0 4780.0 4775.0 4770.0 4765.0 4760.0 4755.0 4750.0 4745.0 4740.0 4735.0 4730.0 4725.0 4720.0 I...s FINISHED GRADE i< co ......1.1 I I s EXISTING GROUND 200' EXTENSION ^—.-. •—!- PROFILE VIEW-EAST ANNIE 4780.0 4775.0 4770.0 4765.0 4760.0 4755.0 4750.0 4745.0 4740.0 4735.0 4730.0 4725.0 4720.0 Jl II ll 11 sl 8-1 NO. REVISIONS DRAWN BY I DATE HORIZONTAL SCALE VERTICAL SCALE II 0 30 60 0 10 20 1 INCH 60 FEET 1 INCH 20 FEET PROJECT ENGINEER: CGB DESIGNED BY: WMS DRAWN BY: WMS REVIEWED BY: CGB BUDESKI f.CE# LAUREL GLEN SUBDIVISION STREET- 200' EAST-WEST EXTENSION BOZEMAN, MONTANA ALLIED ENGINEERING Civil Engineering Land Surveying Geotechnical Engineering 32 DISCOVERY DRIVE BOZEMAN.MT 59718 PHONE (406) 582-0221 FAX (406) 582-5770 PROJECT j|l: 00-185 DATE: 2/2002 R-ANNIE-EXT.DWG FIGURE 6 NO. REVISIONS DRAWN BY DATE HORIZONTAL SCALE 0 30 60 1 INCH 60 FEET VERTICAL SCALE 10 20 INCH - 20 FEET PROJECT ENGINEER: CGB DESIGNED BY: WMS DRAWN BY: WMS REVIEWED BY: CGB LAUREL GLEN SUBDIVISION GLENELLEN ROAD -200' EAST-WEST EXTENSION BOZEMAN, MONTANA ^ •;^"^. ENGINEERING Civil Engineering Land Surveying Geotechnical Engineering Stmctural Engineering 32 DISCOVERY DRIVE BOZEMAN.MT 59718 PHONE (406) 582-022[ FAX (406) 582-5770 PROJECT #: 00-185 DATE: 2/2002 R-GLENELLEN-ext.DWG FIGURE 5 ROUNDABOUT DETAIL - LAUREL PARKWAY & ANNIE BOZEMAN, MONTANA ^^/ -•y'^^Sf. ALLIED ENGINEERING Civil Engineering Land Surveying Geotechnical Engineering Structm-al Engineering 32 DISCOVERY DRIVE BOZEMAN.MT 59718 PHONE (406) 582-0221 FAX (406) 582-5770 PROJECT jjl: 00-185 DATE: 7/1/02 R-DETAILS-2.DWG FIGURE 4 MSB!, DATE: 7/1/02 32 DISCOVERY DRIVE BOZEMAN.MT 59718 PHONE (406) 582-0221 FAX (40«) 582-5770 SCALE: 1 INCH 4.0 FEET SEZ^S R-DETAILS-2.DWG ALLIED ENGINEERING PROJECT DESIGNED ENGINEER: BY: PJS CBG DRAWN REVIEWED BY: BY: PJS CBG FIGURE 3 BROOKSIDE LANE T"'"""—'"-T''-' b < u^ I y ^ DURSTON ROAD !l il ll il sl II _NO. REVISIONS DRAWN BY DATE 800 SCALE: 1 INCH - 600 FEET PROJECT ENGINES^: CGS DESIGNED BY: WMS DRAW) BY: W<S REVIEWED BY: CG8 LAUREL GLEN SUBDIVISION ROAD LAYOUT PLAN BOZEMAN, MONTANA zL/3 ALLIED ENGINEERING Civil Engineering Land Surveying Geotechnical Engineering Structural Engineering 32 DISCOVERY DRIVE BOZEMAN.MT 59718 PHONE (406) 582-0221 FAX (406) 582-5770 PROJECT f: 00-185 DATE 7/23/2002 R-OVERALLOWG FIGURE 2 DRIVING 1.0'— -5.0' 8.0' 14.0' J.- ^5^. 3% 3- 3% 1 A/^. OAK STREET -90' ROW- -14.0'- BOULEVARD 5.0'_ BIKE -0.5' 12.0' DRIVE LANE _....................._..., 5.0'-.-—^^^^^ CENTER TURN LANE DRI\€LANE -5.0"--| BIKE --.14,0'- BOULEVARD CITY OF BOZEMAN STD. CURB AND GUTTER (TYP.) 12.0' 4.0' -I u 3% 3% <'.• / \ z- +.-^.0'-.-j /w. ! r-1,0" — PHASE I FRONTAGE ON DURSTON ROAD WEST PROPERTY BOUNDARY TO LAUREL PARKWAY FUTURE CURB AND GUTTER FUTURE ROADWAY SECTION 3: ^^. I.II sl II II w NO. REVISIONS DRAWN BY DATE NOT TO SCALE PROJECT ENGINEER: CGB DESIGNED BY: CGB DRAWN BY: RFC REVIEWEO BY: CCB LAUREL GLEN SUBDIVISION - PHASE I TYPICAL ROADWAY SECTIONS BOZEMAN, MONTANA sss. ''s^^. ALLIED ENGINEERING SERVICES, INC. Civil Engineering Land Surveying Geotechnical Engineering Structural Engineering 32 DISCOVERY DRIVE BOZEMAN.MT 59718 PHONE (406) 582-022] FAX (406) 582-5770 PROJECT f: 00-185 DATE: 7/1/02 R-DETAILS FIGURE 1