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HomeMy WebLinkAbout21 - Design Report - Northwest Crossing Ph 1 - Sewer Table of Contents 1 PROBLEM DEFINED (DEQ 11.11) ...................................................................................................... 1 2 DESIGN CONDITIONS (DEQ 11.12) ................................................................................................... 1 3 IMPACT ON EXISTING WASTEWATER FACILITIES (11.13) ............................................................ 2 4 PROJECT DESCRIPTION (11.14) ....................................................................................................... 3 5 DRAWINGS (11.15) .............................................................................................................................. 3 6 DESIGN CRITERIA (11.16) .................................................................................................................. 3 7 SITE INFORMATION (11.17) ............................................................................................................... 4 8 ALTERNATIVE SELECTION/ANALYSIS (11.18) ................................................................................ 4 9 ENVIRONMENTAL IMPACTS (11.19) ................................................................................................. 4 EXHIBITS Exhibit A Vicinity Map Exhibit B Framework Plan – by Norris Design Exhibit C Rosa Way Sewer Flow APPENDICES Appendix A NRCS Soils Report Prepared by: Morrison-Maierle, Inc. 2880 Technology Blvd. W. Bozeman, Montana 59771 Phone: (406) 587-0721 Fax: (406) 922-6702 1 Northwest Crossing Subdivision: Phase 1 Sanitary Sewer Design Report EXECUTIVE SUMMARY The proposed Northwest Crossing Subdivision encompasses a total of 160.5 acres and is generally located at the northwest corner of West Oak Street and Cottonwood Road. The property is within the boundaries of the City of Bozeman, Montana and was annexed and zoned REMU (130.994 acres) and B2-M (29.513 acres) in January of 2019. Phase 1 consists of development tracts A-D for a total of 32.9 acres as detailed in the Master Plan Framework developed by Norris Design (Exhibit B). See the vicinity map on Exhibit A for details. The following is the legal description for the property. Tract 5 of Certificate of Survey No. 2552, located in the NE1/4 of Section 4, Township 2 South, Range 5 East, Principal Meridian, Gallatin County, Montana. Sewer collection for the project will consist of sewer mains located in the right-of-way or easements with individual services stubbed to each property or building location. Sewer mains will generally flow to the north and east and connect to an existing 21” PVC main in Cottonwood Road, which drains to a 27” interceptor in Baxter Lane. This design report provides a basis of design for the sewer collection system for the Northwest Crossing Subdivision Phase 1. The sewer collection will be designed and installed in accordance with the Montana Department of Environmental Quality (MDEQ) Circular No. 2; Montana Public Works Standard Specifications (MPWSS); The City of Bozeman Modifications to MPWSS; City of Bozeman Design Standards and Specifications Policy March of 2004, and all Addendum’s; and the City of Bozeman Wastewater Facility Plan. 1 PROBLEM DEFINED (DEQ 11.11) The purpose of this design report is to quantify the anticipated sewer flows from the Northwest Crossing Subdivision and provide preliminary sizing for the proposed sewer infrastructure. The flows from Phase 1 of the Northwest Crossing Subdivision will discharge into the existing 21” sewer main in the Cottonwood Road right of way and the 27” sewer interceptor in Baxter Lane. The following design report follows the section numbering of the Circular DEQ-2 Standards for Public Sewage Systems, 2018. 2 DESIGN CONDITIONS (DEQ 11.12) Phase 1 consists of parcels with two different zoning designations. For the purpose of this report, we will use the areas associated with the Master Site Plan (see the Framework Plan by Norris Design in Exhibit B). Using the areas from the Framework Plan is more conservative than using the areas from the Preliminary Plat (Framework Plan = 32.9 ac and Preliminary Plat = 28.4). The Preliminary Plat areas exclude the road rights-of-way. The Framework Plan is based off gross area. Parcels A, B and C are zoned B2-M and D is zoned REMU. At this point in the design, A and B are planned to be used as commercial centers while C and D will be multifamily housing. The wastewater generation for the proposed development includes sewer services for B2-M and REMU Zoning designation includes uses outlined in the UDO Sec. 38.300.110. Design flowrates for this development are based on the “City of Bozeman Wastewater Collection 2 Facilities Plan Update” prepared my Morrison-Maierle, Inc. in 2015. Based on Table 2-13, the REMU zoned parcels use a flowrate of 1,456 gal/acre/day which is developed from an estimate of 2.17 people per dwelling and a maximum of 10.4 units per acre. The B-2M parcels are designated a flowrate of 2,000 gal/acre/day. The peak hour factor is calculated based on the City Design Standards and Specification Policy). The final addition to projected wastewater generation is infiltration/inflow (I/I) which is 150 gpd/acre per the City Design Standards and Specifications Policy (Section V.B.4 - Page 48). The anticipated sewer flows are calculated as follows: Table 1 – Project Anticipated Demand 1 2015 City of Bozeman Wastewater Facility Plan (Table 2-14, Community Commercial) 2 2015 City of Bozeman Wastewater Facility Plan Phase 1: Total Average Daily Flow Total Average Daily Flow = 29.2 + 1.8 + 15.5 + 1.6 gpm = 48.1 gpm = 69,264 gpd Phase 1: Total Peak flow Total Peak Flow = 120.5 + 66.2 gpm = 186.7 gpm Sewer Capacity Calculations 3 IMPACT ON EXISTING WASTEWATER FACILITIES (11.13) The property is within the wastewater planning boundary for the City of Bozeman as described in the 2015 City of Bozeman Wastewater Collection System Facilities Plan. The property is planned to be served by the proposed Davis Lift Station. This lift station and associated piping to serve the drainage basin is currently under design by HDR Engineering. We have contacted HDR / COP Construction and they have confirmed that infrastructure is currently being installed with completion anticipated July of 2021. All of Phase 1 will flow into the existing Cottonwood main in two locations. New manholes will be placed on the main approximately 1200 ft and 1800 ft north of the Oak Street intersection. Capacity for the entire Northwest Crossing subdivision was addressed in the Master Site Plan Sewer Design Report. From a treatment perspective, the City of Bozeman’s Water Reclamation Facility has adequate capacity to serve the development. 3 4 PROJECT DESCRIPTION (11.14) The purpose of this design report is to quantity the anticipated sewer flows from Phase 1 of the Northwest Crossing Subdivision and provide preliminary sizing for the proposed sewer infrastructure. The flows from the Northwest Crossing Subdivision will discharge into the existing 21” sewer main in the Cottonwood Road right of way and continue on to the 27” sewer main in Baxter Lane. 5 DRAWINGS (11.15) Drawings identifying the site of the project, including the location and alignment of proposed facilities are included in this submittal (see infrastructure plans for details). 6 DESIGN CRITERIA (11.16) Design criteria including average and peak flows were provided in previous sections. The proposed sewer mains will conform to the State’s minimum vertical and horizontal separation criteria from water mains. The proposed conventional gravity sewer collection system is to be constructed to City of Bozeman and the 6th Edition of Montana Public Works (MPW) standard specifications. The sewer mains shall be SDR 35 PVC pipe. All manholes shall be standard concrete manholes spaced no more than 400 feet apart. 12” Sewer Main As part of the review of the preliminary plat for Phase 1, the City of Bozeman has required NWX to accommodate the existing wastewater flow from the area south of this subdivision. More particularly, the existing flow in the mains where Rosa Way meets West Oak Street. The contributing area can be seen in Exhibit C. Our estimation of this flow is: Based on the the area shown in Exhibit C, the contributing area is approximately 73.5 acres. Assuming the entire area is R-4 zoning at 1,950 gal/acre/day, the potential flow from this area is estimated at 143,325 gallons/day. This equates to average flow ~99.5 gpm. Assuming 64.4 gpd/person/day (COB Facility Plan), this equates to a population of 2,226 persons. A peaking factor is then calculated to be 3.55 using the standard equation listed in COB Section V.B.6. A peak flow for this line is estimated to be 99.5 gpm * 3.55 = 353.3 gpm. For NWX Phase 1, the total peak flow was calculated to be 187.4 gpm. That means the 12” Northwest Crossing sewer mains must be able to convey 187.4 gpm + 353.3 gpm = 540.7 gpm. To accommodate the Rosa Way sewer flow and the Phase 1 NWX flows, our design proposes a 12” main in Rosa Way and Harvest Parkway. A 12” main at minimum slope and 75% capacity can accommodate 651 gpm, which is greater than the estimated peak flow of 540.7 gpm. 4 8” Sewer Main The proposed design includes 8” sewer mains along Twin Lakes Avenue, Dayspring Avenue, and Wellspring Drive. An 8” main installed at minimum slope and running at 75% capacity can accommodate 305 gpm. Conservatively assuming that all flow from Parcels A and B, plus half of flow from Parcels C and D will be conveyed into the 8” main in Twin Lakes, the largest peak flow expected would be 153.6 gpm. Therefore 8” mains are sufficient to serve the remainder of the development. Cottonwood Sewer Main Lowering A portion of the 21” sewer main within cottonwood is proposed to be lowered. The lowering of the existing Cottonwood sewer main is proposed at the existing manhole at Harvest Parkway (Sheets SS-10 thru SS-12) was designed to accommodate the western portion of Phase 1 for NWX plus intercept and route flow from an existing manhole south of Oak Street that serves portions of the existing Traditions Subdivision and Flanders Creek Subdivision (Sheet SS-7). This connection at Rosa Way will divert flow from the Laurel Glen Lift Station as desired by the City. Per the 2007 Facility Plan, the peak flow requirement within the 21” sewer main in Cottonwood is 4,210 gpm. The lowered 21” pipe is proposed at a slope 0.45%, which is above the minimum slope requirement. A 21” PVC pipe has a 75% full flow capacity of 4,350 gpm when installed at the proposed 0.45% slope and is therefore sufficient to convey the required flow. 7 SITE INFORMATION (11.17) The development is bounded by Cottonwood Street (principal arterial) to the east, Baxter Lane (minor arterial) to the north, Laurel Parkway (collector) to the west and West Oak Street (principal arterial) to the south. The proposed development is currently undeveloped agricultural land which slopes gently to the north with existing grades of less than 4% and mostly Meadowcreek, Turner and Amsterdam silt loam soil deposits (USDA, Natural Resources Conservation Service, Web Soil Survey). See the soils report located in Appendix A for details. 8 ALTERNATIVE SELECTION/ANALYSIS (11.18) No proposed alternatives were considered 9 ENVIRONMENTAL IMPACTS (11.19) There are no expected environmental impacts from this sewer main extension, as the City of Bozeman Wastewater Treatment Plant has more than adequate capacity for this extension. N:\5659\006_NWX_Phase1Design\04 Design\Reports\Water and Sewer\Sewer Report- Phase 1.doc Exhibit A Vicinity Map 11THSAVE19THNAVE27THNAVE15THNAVEINTERSTATE 90 191HUFFINELN W LINCOLN ST W GARFIELD ST W COLLEGE W BABCOCK ST MAIN STW COTTONWOODRD235 BAXTER LN F R O N T A G E R D OAK STW 27THAVENDURSTON RDDAVISLNPROJECT LOCATION HARPER-RDPUCKETTSPRINGHILLRDV A L L E Y R D C E N T E R E NAVEFERGUSONengineerssurveyorsplannersscientists 2880 Technology Boulevard West Bozeman, MT 59718 Phone: (406) 587-0721 Fax: (406) 922-6702 VICINITY MAP SCALE:1" = 3000' Exhibit B Framework Plan- by Norris Design REVISION DATENORTHWEST CROSSING | FRAMEWORK PLAN AND ZONING 4 DECEMBER 2020 1000 200 SCALE: 1” = 200’ 400 NORTHBAXTER CREEKSINGLE FAMILYATTACHED & DETACHED MULTI-FAMILY/COMMERCIAL COMMERCIAL PLANNING AREAS HOMESTEAD PARK LEGEND Compliance with City of Bozeman Regulations and Development Review The vision for NWX centers on the two underlaying zoning districts; “Community Business -Mixed” (B-2M) located in the southeastern area of the community and the “Residential Emphasis Mixed-Use” (REMU) zoning district designated across the remainder of the property. NWX is designed to meet the standards of these two underlying zoning designations. Compliance with the Underlying REMU and B2-M Zoning StandardsAs specified herein and in the NWX Master Plan and Design Guidelines, all new development will meet the development standards of the underlying zoning district. With future development, should any modifications or variances to these standards be necessary to achieve better design or to meet the intent of the Master Plan, then such requests will be addressed through the applicable City review process. Development of properties zoned REMU will meet the standards set forth within the City of Bozeman Unified Development Code. All new public streets will be complete streets that accommodate pedestrians, bicycles, automobiles, and snow storage. Collector streets and arterial streets external to the site will also accommodate buses. These complete streets create an interconnected and vibrant community. Front-loaded streets are designed to meet the requirements of Section 38.330.020. Permitted UsesThe range of land uses permitted under REMU and B2-M allows for a dynamic mix of homes and businesses at NWX. The B-2M area will function as a vibrant mixed-use district to accommodate substantial growth and enhance the character of the city. The area will have a range of commercial and office uses that serve the immediate area and City as a whole and will include the integration of multi-family residential structures as a secondary use. The area will be designed to emphasize pedestrian oriented design with enhanced pedestrian connections. The REMU district will be mixed-use in character and will provide options for a variety of housing, employment, retail and neighborhood service opportunities. Residential uses, with varying product types and densities will be the primary use in this area. The neighborhoods will be compact and walkable and promote a healthy lifestyle and social interactions. It is intended that the permitted uses in the zoning districts be in accordance with the uses set forth under Table 38.310.040.A. MSP 1.03LAUREL PARKWAY (90’ ROW)HAVENWOOD DRIVEABIGAIL LANEROSA WAYDAYSPRING AVENUETWIN LAKES AVENUECOTTONWOOD ROAD (120’ ROW)BAXTER LANE (100’ ROW) WEST OAK STREET (125’ ROW) HARVEST PARKWAY TOUCHSTONE LANE BOZEMAN SPORTS PARK FLANDERS CREEK SUBDIVISIONLAUREL GLEN SUBDIVISION PHASE 2 FUTURE HIGH SCHOOL B A D B2-M ZONING REMU ZONING EXISTING ZONING BOUNDARY REVISED ZONING BOUNDARY C F G G J I H KL M ON Q P S T U R WE L L S P R IN G D R I VE BR I A R W O O D L A N EP1 P2 P3 P1 P2 P3 Exhibit C Rosa Way Sewer Flow DYH DYH DYH DYH DYH DYH DYH ISISSSSSSSS MWMW MW MWMW MW MW MW S SSSS S SS S SS STPTPTPTP TP TP TP TP TP TP TP TPTP TP TWVWV WVWV WV WVWV WV WVWV WV WV WV WV WV WV WV WVWV WV WV WV WV WVWVWVWVWV WV WV WVWV WV WVWV WV WV WV WV WV WV WV ESEE P WV WWIIII CO CO CO CO CO CO CO MWMWMWMWMWMWMWMWMWUPSTREAM AREA~73.5 ACRESOAK STCOTTONWOOD RDNORTWESTCROSSING Appendix A NRCS Soils Report United States Department of Agriculture A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Gallatin County Area, MontanaNatural Resources Conservation Service June 25, 2019 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/? cid=nrcs142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface....................................................................................................................2 How Soil Surveys Are Made..................................................................................5 Soil Map..................................................................................................................8 Soil Map................................................................................................................9 Legend................................................................................................................10 Map Unit Legend................................................................................................11 Map Unit Descriptions.........................................................................................11 Gallatin County Area, Montana.......................................................................13 53B—Amsterdam silt loam, 0 to 4 percent slopes......................................13 448A—Hyalite-Beaverton complex, moderately wet, 0 to 2 percent slopes....................................................................................................14 451C—Quagle-Brodyk silt loams, 4 to 8 percent slopes.............................16 453B—Amsterdam-Quagle silt loams, 0 to 4 percent slopes......................18 457A—Turner loam, moderately wet, 0 to 2 percent slopes.......................20 509B—Enbar loam, 0 to 4 percent slopes...................................................22 510B—Meadowcreek loam, 0 to 4 percent slopes......................................23 537A—Lamoose silt loam, 0 to 2 percent slopes........................................24 748A—Hyalite-Beaverton complex, 0 to 4 percent slopes..........................26 References............................................................................................................29 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil-vegetation-landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil-landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil-landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field-observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and Custom Soil Resource Report 6 identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. Custom Soil Resource Report 7 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 8 9 Custom Soil Resource Report Soil Map 50599005060000506010050602005060300506040050605005060600506070050608005059900506000050601005060200506030050604005060500506060050607005060800490700 490800 490900 491000 491100 491200 491300 491400 491500 491600 491700 491800 491900 492000 492100 492200 492300 490700 490800 490900 491000 491100 491200 491300 491400 491500 491600 491700 491800 491900 492000 492100 492200 492300 45° 42' 4'' N 111° 7' 10'' W45° 42' 4'' N111° 5' 55'' W45° 41' 30'' N 111° 7' 10'' W45° 41' 30'' N 111° 5' 55'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 12N WGS84 0 350 700 1400 2100 Feet 0 100 200 400 600 Meters Map Scale: 1:7,380 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Gallatin County Area, Montana Survey Area Data: Version 22, Sep 5, 2018 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Sep 10, 2012—Nov 12, 2016 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Custom Soil Resource Report 10 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 53B Amsterdam silt loam, 0 to 4 percent slopes 34.0 16.4% 448A Hyalite-Beaverton complex, moderately wet, 0 to 2 percent slopes 32.0 15.4% 451C Quagle-Brodyk silt loams, 4 to 8 percent slopes 3.6 1.7% 453B Amsterdam-Quagle silt loams, 0 to 4 percent slopes 17.4 8.4% 457A Turner loam, moderately wet, 0 to 2 percent slopes 39.6 19.1% 509B Enbar loam, 0 to 4 percent slopes 6.9 3.3% 510B Meadowcreek loam, 0 to 4 percent slopes 50.9 24.5% 537A Lamoose silt loam, 0 to 2 percent slopes 22.8 11.0% 748A Hyalite-Beaverton complex, 0 to 4 percent slopes 0.3 0.1% Totals for Area of Interest 207.4 100.0% Map Unit Descriptions 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, 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. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different Custom Soil Resource Report 11 management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. Custom Soil Resource Report 12 Gallatin County Area, Montana 53B—Amsterdam silt loam, 0 to 4 percent slopes Map Unit Setting National map unit symbol: 56ws Elevation: 4,400 to 5,550 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature: 37 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: All areas are prime farmland Map Unit Composition Amsterdam and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Amsterdam Setting Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Loess Typical profile A - 0 to 8 inches: silt loam Bw - 8 to 15 inches: silt loam Bk - 15 to 42 inches: silt loam 2C - 42 to 60 inches: very fine sandy loam Properties and qualities Slope: 0 to 4 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 35 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: High (about 10.9 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 3e Hydrologic Soil Group: C Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT), Upland Grassland (R044BP818MT) Hydric soil rating: No Custom Soil Resource Report 13 Minor Components Blackdog Percent of map unit: 5 percent Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT) Hydric soil rating: No Quagle Percent of map unit: 5 percent Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Limy (Ly) 15-19" p.z. (R044XS357MT) Hydric soil rating: No Bowery Percent of map unit: 3 percent Landform: Alluvial fans, stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT) Hydric soil rating: No Meagher Percent of map unit: 2 percent Landform: Stream terraces, alluvial fans Down-slope shape: Linear Across-slope shape: Linear Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT) Hydric soil rating: No 448A—Hyalite-Beaverton complex, moderately wet, 0 to 2 percent slopes Map Unit Setting National map unit symbol: 56sq Elevation: 4,450 to 5,300 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature: 39 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: Farmland of local importance Map Unit Composition Hyalite and similar soils: 70 percent Beaverton and similar soils: 20 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Custom Soil Resource Report 14 Description of Hyalite Setting Landform: Alluvial fans, stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Loamy alluvium Typical profile A - 0 to 5 inches: loam Bt1 - 5 to 9 inches: clay loam Bt2 - 9 to 17 inches: silty clay loam 2Bt3 - 17 to 26 inches: very cobbly sandy clay loam 3C - 26 to 60 inches: very cobbly loamy sand Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.57 in/hr) Depth to water table: About 48 to 96 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 5 percent Available water storage in profile: Low (about 4.4 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecological site: Shallow to Gravel (SwGr) 15-19" p.z. (R044XS354MT), Upland Grassland (R044BP818MT) Hydric soil rating: No Description of Beaverton Setting Landform: Alluvial fans, stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium Typical profile A - 0 to 5 inches: cobbly loam Bt - 5 to 21 inches: very gravelly clay loam Bk - 21 to 25 inches: very cobbly coarse sandy loam 2Bk - 25 to 60 inches: extremely cobbly loamy coarse sand Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: About 48 to 96 inches Frequency of flooding: None Custom Soil Resource Report 15 Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Low (about 3.7 inches) Interpretive groups Land capability classification (irrigated): 4s Land capability classification (nonirrigated): 6s Hydrologic Soil Group: B Ecological site: Shallow to Gravel (SwGr) 15-19" p.z. (R044XS354MT), Upland Grassland (R044BP818MT) Hydric soil rating: No Minor Components Meadowcreek Percent of map unit: 5 percent Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Subirrigated (Sb) 15-19" p.z. (R044XS359MT) Hydric soil rating: No Beaverton Percent of map unit: 5 percent Landform: Alluvial fans, stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Shallow to Gravel (SwGr) 15-19" p.z. (R044XS354MT) Hydric soil rating: No 451C—Quagle-Brodyk silt loams, 4 to 8 percent slopes Map Unit Setting National map unit symbol: 56sy Elevation: 4,350 to 5,150 feet Mean annual precipitation: 14 to 18 inches Mean annual air temperature: 39 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: Farmland of statewide importance Map Unit Composition Quagle and similar soils: 70 percent Brodyk and similar soils: 20 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Custom Soil Resource Report 16 Description of Quagle Setting Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Silty calcareous loess Typical profile A - 0 to 6 inches: silt loam Bw - 6 to 9 inches: silt loam Bk - 9 to 60 inches: silt loam Properties and qualities Slope: 4 to 8 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 35 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: High (about 10.8 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: Limy (Ly) 15-19" p.z. (R044XS357MT), Upland Grassland (R044BP818MT) Hydric soil rating: No Description of Brodyk Setting Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Silty calcareous loess Typical profile A - 0 to 6 inches: silt loam Bk1 - 6 to 30 inches: silt loam Bk2 - 30 to 60 inches: silt loam Properties and qualities Slope: 4 to 8 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Custom Soil Resource Report 17 Calcium carbonate, maximum in profile: 30 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: High (about 10.5 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: Limy (Ly) 15-19" p.z. (R044XS357MT), Limy Grassland (R044BP804MT) Hydric soil rating: No Minor Components Amsterdam Percent of map unit: 8 percent Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT) Hydric soil rating: No Anceney Percent of map unit: 2 percent Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Silty-Droughty (SiDr) 15-19" p.z. (R044XS690MT) Hydric soil rating: No 453B—Amsterdam-Quagle silt loams, 0 to 4 percent slopes Map Unit Setting National map unit symbol: 56t5 Elevation: 4,400 to 5,450 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature: 37 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: All areas are prime farmland Map Unit Composition Amsterdam and similar soils: 60 percent Quagle and similar soils: 30 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Custom Soil Resource Report 18 Description of Amsterdam Setting Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Loess Typical profile A - 0 to 8 inches: silt loam Bw - 8 to 15 inches: silt loam Bk - 15 to 42 inches: silt loam 2C - 42 to 60 inches: very fine sandy loam Properties and qualities Slope: 0 to 4 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 35 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: High (about 10.9 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 3e Hydrologic Soil Group: C Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT), Upland Grassland (R044BP818MT) Hydric soil rating: No Description of Quagle Setting Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Silty calcareous loess Typical profile A - 0 to 6 inches: silt loam Bw - 6 to 9 inches: silt loam Bk - 9 to 60 inches: silt loam Properties and qualities Slope: 0 to 4 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Custom Soil Resource Report 19 Frequency of ponding: None Calcium carbonate, maximum in profile: 35 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: High (about 10.8 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: Limy (Ly) 15-19" p.z. (R044XS357MT), Upland Grassland (R044BP818MT) Hydric soil rating: No Minor Components Beanlake Percent of map unit: 6 percent Landform: Alluvial fans, stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Limy (Ly) 15-19" p.z. (R044XS357MT) Hydric soil rating: No Meagher Percent of map unit: 4 percent Landform: Alluvial fans, stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT) Hydric soil rating: No 457A—Turner loam, moderately wet, 0 to 2 percent slopes Map Unit Setting National map unit symbol: 56tb Elevation: 4,300 to 5,200 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature: 39 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: Prime farmland if irrigated Map Unit Composition Turner and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Custom Soil Resource Report 20 Description of Turner Setting Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium Typical profile A - 0 to 6 inches: loam Bt - 6 to 12 inches: clay loam Bk - 12 to 26 inches: clay loam 2C - 26 to 60 inches: very gravelly loamy sand Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: About 48 to 96 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Low (about 5.4 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 3e Hydrologic Soil Group: B Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT), Upland Grassland (R044BP818MT) Hydric soil rating: No Minor Components Turner Percent of map unit: 5 percent Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT) Hydric soil rating: No Meadowcreek Percent of map unit: 5 percent Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Subirrigated (Sb) 15-19" p.z. (R044XS359MT) Hydric soil rating: No Beaverton Percent of map unit: 5 percent Landform: Stream terraces, alluvial fans Custom Soil Resource Report 21 Down-slope shape: Linear Across-slope shape: Linear Ecological site: Shallow to Gravel (SwGr) 15-19" p.z. (R044XS354MT) Hydric soil rating: No 509B—Enbar loam, 0 to 4 percent slopes Map Unit Setting National map unit symbol: 56vp Elevation: 4,400 to 6,000 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature: 37 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: All areas are prime farmland Map Unit Composition Enbar and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Enbar Setting Landform: Flood plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Loamy alluvium Typical profile A - 0 to 22 inches: loam Cg - 22 to 49 inches: sandy loam 2C - 49 to 60 inches: very gravelly loamy sand Properties and qualities Slope: 0 to 4 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Somewhat poorly drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: About 24 to 42 inches Frequency of flooding: Rare Frequency of ponding: None Calcium carbonate, maximum in profile: 10 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Moderate (about 8.8 inches) Interpretive groups Land capability classification (irrigated): 3w Land capability classification (nonirrigated): 3w Hydrologic Soil Group: C Custom Soil Resource Report 22 Ecological site: Subirrigated (Sb) 15-19" p.z. (R044XS359MT), Bottomland (R044BP801MT) Hydric soil rating: No Minor Components Nythar Percent of map unit: 10 percent Landform: Flood plains Down-slope shape: Linear Across-slope shape: Linear Ecological site: Wet Meadow (WM) 15-19" p.z. (R044XS365MT) Hydric soil rating: Yes Straw Percent of map unit: 5 percent Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT) Hydric soil rating: No 510B—Meadowcreek loam, 0 to 4 percent slopes Map Unit Setting National map unit symbol: 56vt Elevation: 4,200 to 5,950 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 39 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: Prime farmland if irrigated Map Unit Composition Meadowcreek and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Meadowcreek Setting Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium Typical profile A - 0 to 11 inches: loam Bg - 11 to 25 inches: silt loam 2C - 25 to 60 inches: very gravelly sand Custom Soil Resource Report 23 Properties and qualities Slope: 0 to 4 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Somewhat poorly drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: About 24 to 42 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water storage in profile: Low (about 5.1 inches) Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonirrigated): 3e Hydrologic Soil Group: C Ecological site: Subirrigated (Sb) 15-19" p.z. (R044XS359MT), Subirrigated Grassland (R044BP815MT) Hydric soil rating: No Minor Components Blossberg Percent of map unit: 10 percent Landform: Terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Wet Meadow (WM) 15-19" p.z. (R044XS365MT) Hydric soil rating: Yes Beaverton Percent of map unit: 5 percent Landform: Alluvial fans, stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Shallow to Gravel (SwGr) 15-19" p.z. (R044XS354MT) Hydric soil rating: No 537A—Lamoose silt loam, 0 to 2 percent slopes Map Unit Setting National map unit symbol: 56wp Elevation: 4,000 to 5,000 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 39 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: Farmland of local importance Map Unit Composition Lamoose and similar soils: 85 percent Custom Soil Resource Report 24 Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Lamoose Setting Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium Typical profile A - 0 to 9 inches: silt loam Bg - 9 to 27 inches: silt loam 2C - 27 to 60 inches: very gravelly loamy sand Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Poorly drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: About 12 to 24 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 3.0 mmhos/cm) Available water storage in profile: Low (about 5.8 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 5w Hydrologic Soil Group: B/D Ecological site: Wet Meadow (WM) 9-14" p.z. (R044XS349MT), Subirrigated Grassland (R044BP815MT) Hydric soil rating: Yes Minor Components Bonebasin Percent of map unit: 10 percent Landform: Terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Wet Meadow (WM) 15-19" p.z. (R044XS365MT) Hydric soil rating: Yes Meadowcreek Percent of map unit: 5 percent Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Subirrigated (Sb) 9-14" p.z. (R044XS343MT) Hydric soil rating: No Custom Soil Resource Report 25 748A—Hyalite-Beaverton complex, 0 to 4 percent slopes Map Unit Setting National map unit symbol: 570v Elevation: 4,350 to 6,150 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature: 39 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: Farmland of local importance Map Unit Composition Hyalite and similar soils: 70 percent Beaverton and similar soils: 20 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Hyalite Setting Landform: Alluvial fans, stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Loamy alluvium Typical profile A - 0 to 5 inches: loam Bt1 - 5 to 9 inches: clay loam Bt2 - 9 to 17 inches: silty clay loam 2Bt3 - 17 to 26 inches: very cobbly sandy clay loam 3C - 26 to 60 inches: very cobbly loamy sand Properties and qualities Slope: 0 to 4 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 5 percent Available water storage in profile: Low (about 4.4 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecological site: Shallow to Gravel (SwGr) 15-19" p.z. (R044XS354MT), Upland Grassland (R044BP818MT) Hydric soil rating: No Custom Soil Resource Report 26 Description of Beaverton Setting Landform: Stream terraces, alluvial fans Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium Typical profile A - 0 to 5 inches: cobbly loam Bt - 5 to 21 inches: very gravelly clay loam Bk - 21 to 25 inches: very cobbly coarse sandy loam 2Bk - 25 to 60 inches: extremely cobbly loamy coarse sand Properties and qualities Slope: 0 to 4 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Low (about 3.7 inches) Interpretive groups Land capability classification (irrigated): 4s Land capability classification (nonirrigated): 6s Hydrologic Soil Group: B Ecological site: Shallow to Gravel (SwGr) 15-19" p.z. (R044XS354MT), Upland Grassland (R044BP818MT) Hydric soil rating: No Minor Components Hyalite Percent of map unit: 5 percent Landform: Stream terraces, alluvial fans Down-slope shape: Linear Across-slope shape: Linear Ecological site: Shallow to Gravel (SwGr) 15-19" p.z. (R044XS354MT) Hydric soil rating: No Turner Percent of map unit: 5 percent Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT) Hydric soil rating: No Custom Soil Resource Report 27 Custom Soil Resource Report 28 References American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. 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. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/national/soils/?cid=nrcs142p2_054262 Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580 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. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ home/?cid=nrcs142p2_053374 United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/ detail/national/landuse/rangepasture/?cid=stelprdb1043084 29 United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/soils/scientists/?cid=nrcs142p2_054242 United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/? cid=nrcs142p2_053624 United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf Custom Soil Resource Report 30