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Home My WebLink AboutHyric Soil Rating (13067)Hydric Rating by Map Unit—Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 1 of 55058600505900050594005059800506020050606005061000506140050586005059000505940050598005060200506060050610005061400490500490900491300491700492100492500492900493300493700494100494500494900 490500 490900 491300 491700 492100 492500 492900 493300 493700 494100 494500 494900 45° 42' 24'' N 111° 7' 25'' W45° 42' 24'' N111° 3' 53'' W45° 40' 48'' N 111° 7' 25'' W45° 40' 48'' N 111° 3' 53'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 12N WGS84 0 1000 2000 4000 6000Feet 0 300 600 1200 1800Meters Map Scale: 1:20,900 if printed on A landscape (11" x 8.5") sheet. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons Hydric (100%) Predominantly Hydric (66 to 99%) Partially hyrdic (33 to 65%) Predominatly nonhydric (1 to 32%) Nonhydric (0%) Not rated or not available Soil Rating Lines Hydric (100%) Predominantly Hydric (66 to 99%) Partially hyrdic (33 to 65%) Predominatly nonhydric (1 to 32%) Nonhydric (0%) Not rated or not available Soil Rating Points Hydric (100%) Predominantly Hydric (66 to 99%) Partially hyrdic (33 to 65%) Predominatly nonhydric (1 to 32%) Nonhydric (0%) Not rated or not available 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. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov 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 17, Dec 10, 2013 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jul 28, 2011—Aug 19, 2011 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. Hydric Rating by Map Unit—Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 2 of 5 Hydric Rating by Map Unit Hydric Rating by Map Unit— Summary by Map Unit — Gallatin County Area, Montana (MT622) Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 50B Blackdog silt loam, 0 to 4 percent slopes 0 221.5 10.6% 53B Amsterdam silt loam, 0 to 4 percent slopes 0 530.9 25.5% 64B Straw loam, 0 to 4 percent slopes 0 0.4 0.0% 448A Hyalite-Beaverton complex, moderately wet, 0 to 2 percent slopes 0 118.1 5.7% 451C Quagle-Brodyk silt loams, 4 to 8 percent slopes 0 19.8 1.0% 453B Amsterdam-Quagle silt loams, 0 to 4 percent slopes 0 56.2 2.7% 453C Amsterdam-Quagle silt loams, 4 to 8 percent slopes 0 20.1 1.0% 457A Turner loam, moderately wet, 0 to 2 percent slopes 0 439.2 21.1% 509B Enbar loam, 0 to 4 percent slopes 10 148.0 7.1% 510B Meadowcreek loam, 0 to 4 percent slopes 10 253.2 12.1% 511A Fairway silt loam, 0 to 2 percent slopes 10 17.2 0.8% 537A Lamoose silt loam, 0 to 2 percent slopes 95 104.5 5.0% 542A Blossberg loam, 0 to 2 percent slopes 95 78.2 3.7% 556A Threeriv-Bonebasin loams, 0 to 2 percent slopes 95 10.8 0.5% 748A Hyalite-Beaverton complex, 0 to 4 percent slopes 0 67.2 3.2% Totals for Area of Interest 2,085.2 100.0% Hydric Rating by Map Unit—Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 3 of 5 Description This rating indicates the proportion of map units that meets the criteria for hydric soils. Map units are composed of one or more map unit components or soil types, each of which is rated as hydric soil or not hydric. Map units that are made up dominantly of hydric soils may have small areas of minor nonhydric components in the higher positions on the landform, and map units that are made up dominantly of nonhydric soils may have small areas of minor hydric components in the lower positions on the landform. Each map unit is designated as "hydric," "predominantly hydric," "partially hydric," "predominantly nonhydric," or "nonhydric" depending on the rating of its respective components and the percentage of each component within the map unit. "Hydric" means that all components listed for a given map unit are rated as being hydric. "Predominantly hydric" means components that comprise 66 to 99 percent of the map unit are rated as hydric. "Partially hydric" means components that comprise 33 to 66 percent of the map unit are rated as hydric. "Predominantly nonhydric" means components that comprise up to 33 percent of the map unit are rated as hydric. "Nonhydric" means that none of the components are rated as hydric. The assumption here is that all components of the map unit are rated as hydric or nonhydric in the underlying database. A "Not rated or not available" map unit rating is displayed when none of the components within a map unit have been rated. In Web Soil Survey, the Summary by Map Unit table that is displayed below the map pane contains a column named 'Rating'. In this column the percentage of each map unit that is classified as being hydric is displayed. Hydric soils are defined by the National Technical Committee for Hydric Soils (NTCHS) as soils that formed under conditions of saturation, flooding, or ponding long enough during the growing season to develop anaerobic conditions in the upper part (Federal Register, 1994). Under natural conditions, these soils are either saturated or inundated long enough during the growing season to support the growth and reproduction of hydrophytic vegetation. The NTCHS definition identifies general soil properties that are associated with wetness. In order to determine whether a specific soil is a hydric soil or nonhydric soil, however, more specific information, such as information about the depth and duration of the water table, is needed. Thus, criteria that identify those estimated soil properties unique to hydric soils have been established (Federal Register, 2002). These criteria are used to identify map unit components that normally are associated with wetlands. The criteria used are selected estimated soil properties that are described in "Soil Taxonomy" (Soil Survey Staff, 1999) and "Keys to Soil Taxonomy" (Soil Survey Staff, 2006) and in the "Soil Survey Manual" (Soil Survey Division Staff, 1993). If soils are wet enough for a long enough period of time to be considered hydric, they should exhibit certain properties that can be easily observed in the field. These visible properties are indicators of hydric soils. The indicators used to make onsite determinations of hydric soils are specified in "Field Indicators of Hydric Soils in the United States" (Hurt and Vasilas, 2006). Hydric Rating by Map Unit—Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 4 of 5 References: 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. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. 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. Soil Survey Staff. 2006. Keys to soil taxonomy. 10th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. Rating Options Aggregation Method: Percent Present Component Percent Cutoff: None Specified Tie-break Rule: Lower Hydric Rating by Map Unit—Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 5 of 5