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HomeMy WebLinkAbout13.1-Vaughn Environmental Services Wetlands Delineation Report 08-20-2020WATERS OF THE US DELINEATION REPORT BRIDGER VALE SUBDIVISION BOZEMAN, MONTANA November 1, 2016 Prepared for: Andy Ebbighausen Ebbighausen Homes Inc. Prepared by: TABLE OF CONTENTS SECTION PAGE 1.0 PROJECT DESCRIPTION..........................................................................11.1 Site Waterways .......................................................................................1 1.2 Climate ...................................................................................................2 2.0 WETLAND DELINEATION METHODS ......................................................6 2.1 Methods...................................................................................................6 2.2 Technical Criteria.....................................................................................6 3.0 WETLAND DELINEATION RESULTS .......................................................9 3.1 NRCS Soil Survey Results........................................................................93.2 W-1 –Artificial,Riverine, Lower Perennial, Rock Bottom .........................9 4.0 SUMMARY...............................................................................................11 5.0 REFERENCES .........................................................................................12 FIGURE 1.0 -USGS 7.5’ Bozeman Quadrangle Topographic Map.......................3FIGURE 2.0 -Aerial Photograph showing the study area ......................................4FIGURE3.0 -NWI map showing study area..........................................................5 TABLE 1.0 -Summary of Attributes for WUS delineated on Property..............11 APPENDIX A -Wetland Determination Data FormsAPPENDIX B -Natural Resource Conservation Service Soil SurveyAPPENDIX C -Photo Log APPENDIX D -Topographic Map -Sheet 1 of 1 COVER PHOTO: Looking north at W-1 and Manley Road Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision 1 1.0 PROJECT BACKGROUND An investigation to identify waters of the United States (WUS)on the Bridger Vale Subdivision parcel was completed by Vaughn Environmental Services, Inc.(VES)on September 16, 2016.The tract encompasses 6.49 acres of undeveloped land owned by Andy Ebbighausen and located on Manley Road north of the East Gallatin Recreation Area.The proposed development is legally described as the remaining Tract GLR-1 of COS 157 located in the southwest quarter of Section 31, Township 1 South, Range 6 East,Gallatin County (Figure 1.0 –USGS 7.5’ Bozeman Quadrangle Topographic Map and Figure 2.0 –Aerial Photograph).Figure 3.0 shows the project area on the National Wetland Inventory database map.The wetland boundaries were flagged based on vegetation, soil,and hydrological data collected during the September field investigation.C&H Engineering and Surveying, LLC of Bozeman, Montana, surveyed the flagged boundaries of the wetland within the study area and drafted the Topographic Map shown on Sheet 1 of 1 in Appendix D. The field investigation was completed for the landowner to identify the location, extent, and characteristics of jurisdictional WUS within the study area boundaries for compliance with United States Army Corps of Engineers (USACE)regulations. The USACE requires a permit for the discharge of fill material into WUS in accordance with Section 404 of the Clean Water Act (CWA 1986). A Supreme Court 2001 decision in the case of the Solid Waste Agency of Northern Cook County versus US Army Corps of Engineers (SWANCC) limited the federal authority underthe Clean Water act to regulate certain isolated wetlands. In light of the Court’s decision,WUS 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. The Waters of the US Delineation report documents the project background, methodology used to identify project WUS, and findings of the field investigation.Six Wetland Determination Data Forms recording data collected near or within W-1, which encompasses a borrow ditch and adjacent wetland fringe located on the east side of Manley Road (Appendix A).US Department of Agriculture soil mapping information for the site is included in Appendix B and photos of the site are included in Appendix C.The Topographic Map on Sheet 1 of 1 in Appendix D shows the boundaries of the study area wetland.The Wetland Delineation Report will be submitted to the USACE and the City of Bozeman as supporting documentation for the 310/404 Joint Application and City plat approval process.The study area encompassed the acreage within the parcel slated for development. The only wetland on the property was located in or near the borrow ditch for Manley Road located on the west property boundary.The land is mapped within the Threeriv- Bonebasin series (556A)found on flood plains formed in alluvium on 0 to 2 percent slopes (Appendix B -USDA/NRCS 2016).The soil map unit has been used historically as pasture and wildlife habitat. Manley Road parallels the west property boundary, agricultural land and single family residences occupy the land north and immediately south of the property,and the East Gallatin Recreation Area owned by Montana, Fish, Wildlife and Parks occupies the parcels located east and south of the subject property. Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision 2 1.1 SITE WATERWAYS .The borrow ditch located on the east side of Manley Road contained surface water during the September 2016 investigation. An outlet and man-made channel has been excavated at the north side of the East Gallatin Pond. Water in the channel flows east, then north, then west, on the north side of five residences located at the south boundary of the subject property.Surface water from the channel accumulates in a small pond located at the southernmost end of the borrow ditch (W-1). Water in the borrow ditch flows north 0.38 miles along the east side of Manley Road until it discharges to the East Gallatin River. The discharge point is located on the southeast side of the bridge crossing. The Gallatin Conservation District does not classify the borrow ditch as a perennial stream. No 310 permit will be required for impacts to the ditch channel. 1.2 CLIMATE The Bozeman area climate generally resembles that of a middle latitude steppe, with relatively long cold winters and short cool summers (Pac 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 peak 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 characterized 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 north of Bozeman (NRCS 1972). 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. Elevations in the study area range from 4,700 to 4,698 feet above mean sea level (amsl) from south to north.The closest meteorological station to the study area is Montana State University located approximately 2.7 miles south of the project at 4,860 feet amsl.Records from 1961 to 1990 for Bozeman indicate that the average annual precipitation is 19.25 inches with an average total snowfall of 92.1 inches. The average temperature at the climate station is 44.2 degrees Fahrenheit (USDA 1990). The mean annual precipitation rate for the predominant soil series in the study area,the Threeriv-Bonebasin loam (509B), is 15 inches. Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision 3 Figure 1.0 USGS 7.5 minute Bozeman Quadrangle Topographic Map showing project location. Project Location Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision 4 Figure 2.0 Aerial Photograph showing road that bisects study area.Borrow ditch is shown on east side of Manley Road. Waters of the US Delineation Report –Bridger Vale Subdivision 5 Figure 3.0 National Wetland Inventory Map showing study area and PABGx Bozeman Pond south of parcel.The East Gallatin River crosses Manley Road north of site. Bridger Vale Esri,HERE,DeLorme,MapmyIndia,©OpenStreetMapcontributors,andtheGISusercommunity Estuarine and Marine Deepwater Estuarine and Marine Wetland Freshwater Emergent Wetland Freshwater Forested/Shrub Wetland Freshwater Pond Lake Other Riverine October 31,2016 0 0.15 0.30.075 mi 0 0.25 0.50.125 km 1:9,762 Thispagewas producedbytheNWImapperNationalWetlandsInventory(NWI) This map is for generalreferenceonly.The US Fish andWildlifeServiceisnotresponsiblefortheaccuracyorcurrentnessofthebasedatashownonthismap.All wetlandsrelated datashouldbeusedinaccordancewiththelayermetadatafoundontheWetlandsMapperwebsite. Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision 6 2.0 WETLAND DELINEATION METHODS 2.1 METHODS Waters of the US including jurisdictional wetlands within the study area were identified on September 16, 2016,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 presented in the Field Guide for Wetland Delineation (Environmental Laboratory 1987)and the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (USACE 2010). The Routine Level-2 Onsite Determination Method employs primarily qualitative procedures. Sample plots (approximately a 15-foot radius) 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. 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 unless the wetland is atypical or problematic. 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.Six Wetland Data Collection Forms summarizing data collected from three wetland and three upland soil test pits (SP-1 through SP-6)were completed for the artificial riverine wetland W-1 located in the borrow ditch on the east side of Manley Road. 2.2 TECHNICAL CRITERIA 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.Hydrophytic 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.Hydric Soils: Defined as soil that forms under conditions of saturation, flooding, or ponding long enough during the growing season to develop anaerobic conditions in the upper part (59 Fed. Reg. 35680, 7/13/94). Hydrophytic Vegetation Plants must be physiologically or morphologically adapted to saturated or anaerobic soil conditions to grow in wetlands. The USACE and the US Fish and Wildlife Service (USFWS) have determined the estimated probability of finding representative wetland species within specified areas under natural conditions. Accordingly, plants may be categorized as obligate (OBL), facultative wetland (FACW), facultative (FAC), facultative upland (FACU), or upland (UPL) in decreasing order of moisture dependence or tolerance. Obligate species occur greater than 99 percent of the time in a wetland. Facultative wetland species have a 67 to 99 percent probability Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision 7 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,or FAC are considered hydrophytic. Vegetation indicator status for this investigation was derived from the Western Mountains, Valleys, and Coast Region 2016 Regional Wetland Plant List (Lichvar et al. 2016).Taxonomic references included Dorn 1984, Hitchcock 1971, Lackschewitz 1991, and Lesica and Husby 2001. The name and indicator status of individual species within each vegetation stratum was recorded on the data form in descending order of abundance (Appendix A). Under the dominance test introduced in the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (USACE 2010), a sample plot is classified as having wetland vegetation if the cumulative total of the estimated percent cover for the dominant hydrophytic species exceeds 50 percent and 50 percent or greater of the dominant species have a hydrophytic indicator status. The Regional Supplement also introduced the Prevalence Index, Morphological Adaptations, and Wetland Non-Vascular plants as indicators of hydrophytic vegetation only when indicators of hydric soil and wetland hydrology are also present. 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” (Environmental Laboratory 1987). 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 between 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 Bozeman growing season extends from May 5 to October 1 according to the WETS Bozeman Climate data. Approximately 19 days of saturation would meet the wetland hydrology criterion for a specific wetland. Either direct observations of inundation or well data showing a free water surface at depths less than 12 inches continuously for more than 5 percent of the growing season have been used nationally to distinguish active wetland hydrology. Surface water, groundwater, direct precipitation, and/or snowmelt may contribute to wetland hydrology. Field observations were used to determine existing wetland hydrology.A positive indication of wetland hydrology requires either one primary indicator or two or more secondary indicators.The Regional Supplement for the Western Mountains area lists the primary indicators as 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, and stunted or stressed plants. Secondary indicators include water-stained leaves, drainage patterns, dry-season water table, saturation visible on aerial imagery, geomorphic position, shallow aquitard, FAC-neutral test, raised ant mounds, and frost-heave hummocks. Hydric 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), Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision 8 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, include high organic matter content (histic epipedons), accumulation of sulfidic material, gley formation (greenish or bluish gray color), redoximorphic features (mottling), and low soil chromas (dark soil colors –soil chroma).Organic matter content is estimated visually and texturally; redoximorphic features are identified visually; sulfidic material is identified by the odor of sulfide gases; and 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.The Regional Supplement for Western Mountains introduced new classifications for hydric soil indicators based on the soil type (organic, muck or mineral), soil matrix, and type of redoximorphic features such as concentrations, depletions, reduced matrix, or covered or coated sand grains.The full description of each category is included in Chapter Three of the Regional Supplement for the Western Mountains area.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). Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision 9 3.0 WETLAND DELINEATION RESULTS A site investigation to determine the presence and extent of waters of the US within the study area was completed by VES on September 16, 2016.C&H Engineering and Surveying surveyed the demarcated boundaries using a global positioning system (GPS). Wetland boundaries were flagged by VES based on the presence of hydrophytic vegetation, hydric soil,and primary hydrologic indicators.Wetland types were based on similarities in physiographic, hydrologic, and plant community characteristics. Site-specific wetland parameters are described on the Wetland Determination Data Forms included in Appendix A.C&H Engineers drafted the Topographic Map that shows the boundaries of W-1 identified within the study area (Sheet 1 of 1,Appendix D). Wetland 1 (W-1) is a man-made,lower perennial,riverine wetland based on the hydrogeomorphic classification system (Smith et al. 1995). The primary source of water is surface water overflow from an outlet on the north end of the East Gallatin pond located south of the subject property.The wetland is classified as rock bottom with emergent vegetation according to the Cowardin classification system (Cowardin et al. 1979).The moisture regime is permanently flooded (PF).Surface water in the man-made channel discharges to the East Gallatin River approximately 0.38 miles north of the parcel. Section 3.1 discusses the Natural Resource Conservation Service (NRCS) soil survey results for the project site.The characteristics of the project WUS are described in Section 3.2. The Wetland Determination Data forms are included in Appendix A and the NRCS soil map and soil descriptions are included in Appendix B. Photographs of the site wetland are included in Appendix C.Appendix D presents the Topographic Map showing the wetland boundaries on Sheet 1 of 1. 3.1 NRCS SOIL SURVEY RESULTS The web soil survey for Gallatin County (USDA/NRCS 2016)maps the man-made channel W-1 within the Threeriv-Bonebasin loam (556A) map unit found on 0 to 2 percent slopes (Appendix B).The Threeriv series consists of very deep,very poorly drained soils taxonomically classified as a fine-loamy over sandy or sandy-skeletal,mixed, superactive,calcareous,frigid Typic Fluvaquents. It is classified as hydric by virtue of the aquic order.The Bonebasin series consists of very deep, very poorly drained soils, taxonomically classified as a superactive, frigid, Fluvaquentic Endoaquolls. The series is classified as hydric. 3.2 W-1 –ARTIFICIAL,LOWER PERENNIAL, RIVERINE,ROCK BOTTOM AND EMERGENT The Topographic Map (Sheet 1 -Appendix D)demarcates the boundaries of W-1.Six soil test pits were excavated to determine the boundary between wetland and upland. Test pits SP- 1 and SP-2 were located in wetland and upland, respectively,on the north half of W-1. Test pits SP-3 and SP-4 were excavated within the wetland boundary on the south half of W-1. Test pits SP-5 and SP-6 were excavated in upland at the edge of the W-1 boundary on the south half of W- 1.A rock layer between 9 and 12 inches on the south half of W-1 restricted the depth of the test pits in some locations.The soil test pit locations are shown on the map in Appendix D. None of the wetland test pits exhibited saturation or inundation.However, there was water flowing in the borrow ditch channel and ponded surface water noted in several areas within the wetland fringe that extends from the ditch. Vegetation –North Half of W-1 Reed canary grass (Phalaris arundinacea –FACW),smooth brome (Bromus inermis – UPL) and spreading bent grass (Agrostis stolonifera –FAC) dominated the vegetation cover at SP-1. Additional species included Northwest Territory sedge (Carex utriculata –OBL)and Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision 10 common tansy (Taraxacum vulgare –FACU). The species met the dominance test for vegetation.The same species dominated the cover at SP-2 albeit in different cover percentages. The dominance test was equal to 50 percent.The dominant species met the prevalence test for hydrophytic vegetation. Vegetation –South Half of W-1 Test pit SP-3 was located at the edge of the common cattail (Typha latifolia –OBL) dominated,inundated wetland fringe in the south half of W-1. The cover was dominated by common cattail and spreading bent grass meeting the dominance test for wetland vegetation. Test pit SP-4 was located in wetland east of SP-3.Spreading bent grass, common cattail, orchard grass, and common timothy (Phleum pratense –FAC) dominated the cover meeting the dominance test. Test pit SP-5 was located in upland at the edge of W-1. The plant cover of orchard grass, spreading bent grass, Kentucky bluegrass (Poa pratensis –FAC), and common cattail met the dominance test. Pit SP-6 was located in upland further east of SP-5 and higher in elevation.The same plants observed at SP-5 dominated the cover at SP-6. Soil –North half of W-1 Pit SP-1 revealed a black silt loam (10 YR 2/1)from 11 to 15 inches below the ground surface with 2 percent dark yellowish brown (10 YR 4/4) redox concentrations in the matrix.The redox dark surface was a positive indicator of a hydric soil. The soil profile in SP-2 exhibited a very dark brown (10 YR 2/2) dry, friable silt loam without redoximorphic features.The soil did not meet the wetland criteria. Soil –South half of W-1 Test pit SP-3 revealed a sticky black (10 YR 2/1) silt loam with dark yellowish brown (10 YR 4/4)redox concentrations in the matrix meeting the hydric soil criteria for a redox dark surface. Pit SP-4 exhibited a black silt loam (10 YR 2/1) from 0 to 12 inches bgs with grayish brown (10 YR 5/2) depletions in the matrix near 12 inches bgs.The depleted dark surface met the hydric soil criteria.Pockets of gray sand were noted within the profile.Pit SP-5 revealed a very dark brown (10 YR 2/2) silt clay loam with 2 percent grayish brown (10 YR 5/2) depletions to 9 inches bgs. A rock layer precluded a deeper excavation. The soil characteristics did not meet the hydric soil criteria.Test pit SP-6 was excavated to 13 inches bgs.The characteristics were the same as SP-5. Neither test pit met the wetland criteria for depleted dark surface based on the higher chroma and low percentage of depletions present. Hydrology –North half of W-1 The data collection point at SP-1 provided two secondary indicators of wetland hydrology, saturation visible on aerial imagery and geomorphic position. Data collection point SP-2 was located up the bank slope from SP-1. There were no indicators of wetland hydrology at SP-2. Hydrology –South half of W-1 Primary and secondary indicators of wetland hydrology at SP-3 included a sparsely vegetated concave surface, saturation visible on aerial imagery, and geomorphic position. Test pit SP-4 was located east of SP-3 near the wetland-upland boundary. Saturation visible on aerial imagery and geomorphic position were secondary indicators of wetland hydrology at SP-4. Test pits SP-5 and SP-6 did not exhibit any indicators of wetland hydrology. Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision 11 4.0 SUMMARY Wetland W-1 is a man-made,lower perennial, rock bottom, riverine wetland that discharges to the East Gallatin River approximately 0.38 miles north of the subject property.The source of water is overflow from an outlet channel located at the north end of the East Gallatin Recreation Area Pond.The man-made channel is diverted to the borrow ditch on the east side of Manley Road. The wetland was assumed to be jurisdictional based on the downgradient connection to the East Gallatin River. Table 1.0 Summary of Attributes for Wetland W-1 delineated on UPS Property. Wetland Designation Hydrogeomorphic/Cowardin Class Jurisdictional Status Areal Extent (Acres) W-1 Man-made,lower perennial, rock bottom, riverine (PF*)Jurisdictional 0.302 *Permanently flooded. Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision 12 5.0 REFERENCES Clean Water Act, Section 404. 1986. Federal Register -Regulatory Programs of the Corps of Engineers. Cowardin, Lewis M., Virginia Carter, Francis C. Golet, and Edward T. LaRoe. 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, Vicksbrug, 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. Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016.Western Mountains, Valleys, and Coast Region 2016 Regional Wetland Plant List.The National Wetland Plant List: 2016 wetland ratings.Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X. 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. 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 WRP-DE-9. US Army Corps of Engineers Waterways Experiment Station. Vicksburg, MS. US Department of Agriculture, Natural Resource Conservation Service 1990, WETS 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. U.S. Army Corps of Engineers. 2010.Regional Supplement to theCorps of Engineers Wetland Delineation Manual: WesternMountains, Valleys, and Coast Region (Version 2.0), ed. J. S.Wakeley, R. W. Lichvar, and C. V. Noble. ERDC/EL TR-10-3.Vicksburg, MS: U.S. Army Engineer Research and DevelopmentCenter. WEBSITES: USDA/NRCS Web Soil Survey, Gallatin County, accessed September 2016:http://websoilsurvey.nrcs.usda.gov/app/ APPENDIX A WETLAND DETERMINATION DATA FORMS Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision APPENDIX B NRCS SOIL SURVEY Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision SoilMap—Gallatin CountyArea,Montana(Ebigghausen -Manley Road) Natural ResourcesConservationService Web Soil SurveyNationalCooperativeSoil Survey 10/3/2016Page1of3506100050611005061200506130050614005061500506160050617005061800506100050611005061200506130050614005061500506160050617005061800496700496800496900497000497100497200 496700 496800 496900 497000 497100 497200 45°42'35''N 111°2'35''W45°42'35''N111°2'6''W45°42'8''N 111°2'35''W45°42'8''N 111°2'6''WN Mapprojection:WebMercator Cornercoordinates:WGS84 Edgetics:UTMZone12NWGS840150300600900Feet050100200300MetersMapScale:1:4,060ifprintedonAportrait (8.5"x 11")sheet. Warning:Soil Map may not be valid at this scale. LOCATION THREERIV MT Established SeriesRev. GAR-JJU-RJS 06/2011 THREERIV SERIES The Threeriv series consists of very deep, very poorly drained soils that formed in alluvium. These soils areon flood plains. Slopes are 0 to 2 percent. Mean annual precipitation is about 15 inches, and the mean annual air temperature is about 40 degrees F. TAXONOMIC CLASS:Fine-loamy over sandy or sandy-skeletal, mixed, superactive, calcareous, frigidTypic Fluvaquents TYPICAL PEDON:Threeriv loam, in pastureland (colors are for moist soil unless otherwise noted). Oe--0 to 4 inches; partially decomposed sedges, rushes and grasses; slightly alkaline (pH 7.8); clear smooth boundary. (2 to 6 inches thick) Ag--4 to 9 inches; dark gray (10YR 4/1) loam, gray (10YR 5/1) dry; few fine prominent brown (7.5YR 4/4)redox concentrations; weak medium subangular blocky structure; hard, friable, moderately sticky and moderately plastic; few very fine and fine, and common medium roots; 10 percent gravel; stronglyeffervescent; moderately alkaline (pH 8.0). (2 to 9 inches thick) Cg--9 to 29 inches; light brownish gray (10YR 6/2) sandy clay loam consisting of strata of sandy clay loam and sandy loam, light gray (10YR 7/2) dry; common fine prominent dark yellowish brown (10YR 4/6) redoxconcentrations; massive; hard, friable, slightly sticky and slightly plastic; few very fine, fine and medium roots; 10 percent gravel; violently effervescent; moderately alkaline (pH 8.4); clear smooth boundary.(15 to31 inches thick) 2C--29 to 60 inches; variegated extremely gravelly loamy sand; single grain; loose, nonsticky and nonplastic; 60 percent gravel and 15 percent cobbles; moderately alkaline (pH 8.0). TYPE LOCATION:Gallatin County, Montana; 2,200 feet south and 200 feet west of the northeast cornerof sec. 2, T. 1N, R. 1E. RANGE IN CHARACTERISTICS:Mean annual soil temperature -40 to 45 degrees F.Depth to lithologic discontinuity -20 to 40 inches Depth to seasonal high water table -0 to 12 inches Ag horizonHue: 10YR, N, 5Y; dry or moist Value: 5 or 6 dry; 3 or 4 moistTexture: loam, silt loam or silty clay loam Clay content: 18 to 35 percentRock fragments: 0 to 10 percent gravel Calcium carbonate equivalent: 2 to 15 percentReaction: pH 7.9 to 8.4 Cg horizon Hue: 10YR, 5Y or 2.5Y; dry or moistValue: 5 to 7 dry; 4 to 6 moist Chroma: 1 or 2; dry or moistTexture: stratified sandy clay loam, sandy loam, silty clay loam or clay loam Clay content: 15 to 35 percentRock fragments: 0 to 10 percent gravel Calcium carbonate equivalent: 2 to 15 percentReaction: pH 7.9 to 8.4 2C horizon Hue: 10YR or variegated; dry or moistValue: 5 or 6 dry; 4 or 5 moist Texture: loamy sand, loamy coarse sand, sand or coarse sandClay content: 0 to 10 percent Rock fragments: 35 to 85 percent--25 to 60 percent gravel, 10 to 25 percent cobblesReaction: pH 7.4 to 8.4 COMPETING SERIES:Beavrock (MT)-have a seasonal high water table at 12 to 24 inches GEOGRAPHIC SETTING:Landform -flood plains Elevation -4,000 to 6,500 feetSlope-0 to 2 percent Parent material -alluviumClimate-long, cold winters; moist springs; warm summers Mean annual precipitation -10 to 18 inchesMean annual air temperature -38 to 43 degrees F. Frost-free period -70 to 110 days GEOGRAPHICALLY ASSOCIATED SOILS:None listed. DRAINAGE AND PERMEABILITY:Very poorly drained; moderately slow over rapid permeability. USE AND VEGETATION:Threeriv soils are used mainly for pasture and wildlife habitat. Potential nativevegetation may include tall reedgrasses, tall sedges and rushes, American sloughgrass, iris, willows, waterbirch, dogwood and silver buffaloberry, as well as other forbs, grasses, sedges and shrubs. DISTRIBUTION AND EXTENT:Threeriv soils are of small extent in Southwestern Montana. MLRA -44B. MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE:Bozeman, Montana. SERIES ESTABLISHED:Gallatin County, Montana, 1997. REMARKS:Diagnostic horizons and features recognized in this pedon are: Ochric epipedon -from 0 to 9 inches (Oe, Ag horizons)Lithologic discontinuity -at 29 inches (2C horizon) Particle-size control section -from 14 to 44 inches (part of Cg, part of 2C horizons) Threeriv soils have a frigid temperature regime and an aquic moisture regime. ADDITIONAL DATA:Soil interpretation record -MT1640. National Cooperative Soil Survey APPENDIX C PHOTO LOG Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision Photo 1.The view is looking northwest at SP-1 at the edge of the borrow ditch on Manley Road. Photo 2.The view is of SP-2 looking northwest toward Manley Road. Photo 3.The photo is looking west toward SP-3 and Manley Road. Photo 4.The photo is looking at SP-4,east of SP-3. Photo 5.The photo shows SP-5 located outside the east edge of the south half of the wetland looking north. Photo 6.0 The view is looking west at the ponded water at the south end of the south half of the borrow ditch (W-1). Photo 7.0 The view is looking south at the south half of W-1 adjacent to Manley Road. Appendix D WETLAND DELINEATION EXHIBIT Waters of the US Delineation Report –Ebbighausen –Bridger Vale Subdivision