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HomeMy WebLinkAboutEngineering Properties (13067)Engineering Properties This table gives the engineering classifications and the range of engineering properties for the layers of each soil in the survey area. Hydrologic group is a group of soils having similar runoff potential under similar storm and cover conditions. Soil properties that influence runoff potential are those that influence the minimum rate of infiltration for a bare soil after prolonged wetting and when not frozen. These properties are depth to a seasonal high water table, saturated hydraulic conductivity after prolonged wetting, and depth to a layer with a very slow water transmission rate. Changes in soil properties caused by land management or climate changes also cause the hydrologic soil group to change. The influence of ground cover is treated independently. There are four hydrologic soil groups, A, B, C, and D, and three dual groups, A/D, B/D, and C/D. In the dual groups, the first letter is for drained areas and the second letter is for undrained areas. The four hydrologic soil groups are described in the following paragraphs: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. Depth to the upper and lower boundaries of each layer is indicated. Texture is given in the standard terms used by the U.S. Department of Agriculture. These terms are defined according to percentages of sand, silt, and clay in the fraction of the soil that is less than 2 millimeters in diameter. "Loam," for example, is soil that is 7 to 27 percent clay, 28 to 50 percent silt, and less than 52 percent sand. If the content of particles coarser than sand is 15 percent or more, an appropriate modifier is added, for example, "gravelly." Classification of the soils is determined according to the Unified soil classification system (ASTM, 2005) and the system adopted by the American Association of State Highway and Transportation Officials (AASHTO, 2004). Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 1 of 12 The Unified system classifies soils according to properties that affect their use as construction material. Soils are classified according to particle-size distribution of the fraction less than 3 inches in diameter and according to plasticity index, liquid limit, and organic matter content. Sandy and gravelly soils are identified as GW, GP, GM, GC, SW, SP, SM, and SC; silty and clayey soils as ML, CL, OL, MH, CH, and OH; and highly organic soils as PT. Soils exhibiting engineering properties of two groups can have a dual classification, for example, CL-ML. The AASHTO system classifies soils according to those properties that affect roadway construction and maintenance. In this system, the fraction of a mineral soil that is less than 3 inches in diameter is classified in one of seven groups from A-1 through A-7 on the basis of particle-size distribution, liquid limit, and plasticity index. Soils in group A-1 are coarse grained and low in content of fines (silt and clay). At the other extreme, soils in group A-7 are fine grained. Highly organic soils are classified in group A-8 on the basis of visual inspection. If laboratory data are available, the A-1, A-2, and A-7 groups are further classified as A-1-a, A-1-b, A-2-4, A-2-5, A-2-6, A-2-7, A-7-5, or A-7-6. As an additional refinement, the suitability of a soil as subgrade material can be indicated by a group index number. Group index numbers range from 0 for the best subgrade material to 20 or higher for the poorest. Rock fragments larger than 10 inches in diameter and 3 to 10 inches in diameter are indicated as a percentage of the total soil on a dry-weight basis. The percentages are estimates determined mainly by converting volume percentage in the field to weight percentage. Percentage (of soil particles) passing designated sieves is the percentage of the soil fraction less than 3 inches in diameter based on an ovendry weight. The sieves, numbers 4, 10, 40, and 200 (USA Standard Series), have openings of 4.76, 2.00, 0.420, and 0.074 millimeters, respectively. Estimates are based on laboratory tests of soils sampled in the survey area and in nearby areas and on estimates made in the field. Liquid limit and plasticity index (Atterberg limits) indicate the plasticity characteristics of a soil. The estimates are based on test data from the survey area or from nearby areas and on field examination. 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. Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 2 of 12 Report—Engineering Properties Absence of an entry indicates that the data were not estimated. The asterisk '*' denotes the representative texture; other possible textures follow the dash. Engineering Properties–Gallatin County Area, Montana Map unit symbol and soil name Pct. of map unit Hydrolo gic group Depth USDA texture Classification Fragments Percentage passing sieve number—Liquid limit Plasticit y indexUnifiedAASHTO>10 inches 3-10 inches 4 10 40 200 In Pct Pct Pct 50B—Blackdog silt loam, 0 to 4 percent slopes Blackdog 90 C 0-10 Silt loam CL-ML A-4 0 0 100 100 95-100 80-90 25-30 5-10 10-19 Silty clay loam CL A-6 0 0 100 100 95-100 85-95 30-40 10-20 19-60 Silt loam CL-ML A-4 0 0 100 100 95-100 80-90 25-30 5-10 53B—Amsterdam silt loam, 0 to 4 percent slopes Amsterdam 85 C 0-8 Silt loam CL-ML A-4 0 0 100 100 95-100 75-95 25-30 5-10 8-15 Silt loam, very fine sandy loam, silty clay loam CL, CL- ML A-4, A-6 0 0 100 100 95-100 80-95 25-35 5-15 15-42 Silt loam, very fine sandy loam CL-ML A-4 0 0 100 100 95-100 80-90 25-30 5-10 42-60 Silt loam, very fine sandy loam CL-ML, ML A-4 0 0 100 100 95-100 70-90 20-30 NP-10 64B—Straw loam, 0 to 4 percent slopes Straw 90 B 0-18 Loam CL-ML A-4 0 0 100 100 80-100 60-85 25-30 5-10 18-60 Loam, silt loam, clay loam CL, CL- ML A-4, A-6 0 0 100 100 80-100 60-85 25-35 5-15 Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 3 of 12 Engineering Properties–Gallatin County Area, Montana Map unit symbol and soil name Pct. of map unit Hydrolo gic group Depth USDA texture Classification Fragments Percentage passing sieve number—Liquid limit Plasticit y indexUnifiedAASHTO>10 inches 3-10 inches 4 10 40 200 In Pct Pct Pct 448A—Hyalite- Beaverton complex, moderately wet, 0 to 2 percent slopes Hyalite 70 C 0-5 Loam CL-ML A-4 0 0-10 95-100 90-100 75-95 55-75 25-30 5-10 5-9 Clay loam, loam, silty clay loam CL A-6 0 0-10 90-100 85-100 75-90 60-80 30-35 10-15 9-17 Clay loam, silty clay loam, gravelly loam CL, GC, SC A-6 0 0-15 65-95 60-90 55-80 40-75 30-35 10-15 17-26 Very cobbly sandy clay loam, very cobbly sandy loam, extremely cobbly sandy loam GM, SM A-1, A-2 0 30-55 35-65 30-60 20-50 10-25 20-35 NP-10 Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 4 of 12 Engineering Properties–Gallatin County Area, Montana Map unit symbol and soil name Pct. of map unit Hydrolo gic group Depth USDA texture Classification Fragments Percentage passing sieve number—Liquid limit Plasticit y indexUnifiedAASHTO>10 inches 3-10 inches 4 10 40 200 In Pct Pct Pct 26-60 Very cobbly loamy sand, very cobbly sand, extremely cobbly coarse sand GM, GP- GM, SM, SP- SM A-1 0 30-55 35-65 30-60 15-40 5-15 —NP Beaverton 20 B 0-5 Cobbly loam CL-ML, SC-SM A-4 0 15-30 75-95 70-90 60-80 45-65 25-30 5-10 5-21 Very cobbly clay loam, very cobbly sandy clay loam, very gravelly clay loam GC, GC- GM, SC, SC- SM A-2, A-4, A-6 0 20-40 45-70 40-60 35-55 20-40 25-35 5-15 21-25 Very cobbly coarse sandy loam GM, GP- GM, SM, SP- SM A-1 0 25-50 30-75 20-65 10-50 5-15 —NP 25-60 Extremely cobbly loamy coarse sand, extremely gravelly sand, very cobbly loamy sand GM, GP- GM, SM, SP- SM A-1 0 25-50 30-75 20-65 10-50 5-15 —NP 451C—Quagle-Brodyk silt loams, 4 to 8 percent slopes Quagle 70 B 0-6 Silt loam CL-ML A-4 0 0 100 100 95-100 75-85 25-30 5-10 6-9 Silt loam CL-ML A-4 0 0 100 100 95-100 80-90 25-30 5-10 9-60 Silt loam CL-ML, ML A-4 0 0 100 95-100 90-95 80-90 20-30 NP-10 Brodyk 20 B 0-6 Silt loam CL-ML A-4 0 0 100 100 95-100 75-85 25-30 5-10 6-30 Silt loam CL-ML A-4 0 0 100 100 95-100 80-90 20-25 5-10 30-60 Silt loam, very fine sandy loam CL-ML A-4 0 0 100 95-100 90-95 80-90 20-25 5-10 Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 5 of 12 Engineering Properties–Gallatin County Area, Montana Map unit symbol and soil name Pct. of map unit Hydrolo gic group Depth USDA texture Classification Fragments Percentage passing sieve number—Liquid limit Plasticit y indexUnifiedAASHTO>10 inches 3-10 inches 4 10 40 200 In Pct Pct Pct 453B—Amsterdam- Quagle silt loams, 0 to 4 percent slopes Amsterdam 60 C 0-8 Silt loam CL-ML A-4 0 0 100 100 95-100 75-95 25-30 5-10 8-15 Silt loam, very fine sandy loam, silty clay loam CL, CL- ML A-4, A-6 0 0 100 100 95-100 80-95 25-35 5-15 15-42 Silt loam, very fine sandy loam CL-ML A-4 0 0 100 100 95-100 80-90 25-30 5-10 42-60 Silt loam, very fine sandy loam CL-ML, ML A-4 0 0 100 100 95-100 70-90 20-30 NP-10 Quagle 30 B 0-6 Silt loam CL-ML A-4 0 0 100 100 95-100 75-85 25-30 5-10 6-9 Silt loam CL-ML A-4 0 0 100 100 95-100 80-90 25-30 5-10 9-60 Silt loam CL-ML, ML A-4 0 0 100 95-100 90-95 80-90 20-30 NP-10 453C—Amsterdam- Quagle silt loams, 4 to 8 percent slopes Amsterdam 60 C 0-8 Silt loam CL-ML A-4 0 0 100 100 95-100 75-95 25-30 5-10 8-15 Silt loam, very fine sandy loam, silty clay loam CL, CL- ML A-4, A-6 0 0 100 100 95-100 80-95 25-35 5-15 15-42 Silt loam, very fine sandy loam CL-ML A-4 0 0 100 100 95-100 80-90 25-30 5-10 42-60 Silt loam, very fine sandy loam CL-ML, ML A-4 0 0 100 100 95-100 70-90 20-30 NP-10 Quagle 30 B 0-6 Silt loam CL-ML A-4 0 0 100 100 95-100 75-85 25-30 5-10 6-9 Silt loam CL-ML A-4 0 0 100 100 95-100 80-90 25-30 5-10 9-60 Silt loam CL-ML, ML A-4 0 0 100 95-100 90-95 80-90 20-30 NP-10 Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 6 of 12 Engineering Properties–Gallatin County Area, Montana Map unit symbol and soil name Pct. of map unit Hydrolo gic group Depth USDA texture Classification Fragments Percentage passing sieve number—Liquid limit Plasticit y indexUnifiedAASHTO>10 inches 3-10 inches 4 10 40 200 In Pct Pct Pct 457A—Turner loam, moderately wet, 0 to 2 percent slopes Turner 85 B 0-6 Loam CL-ML A-4 0 0-10 80-100 75-100 65-95 50-75 25-30 5-10 6-12 Clay loam, silty clay loam, gravelly loam CL, GC, SC A-6 0 0-10 65-100 60-100 55-90 35-70 30-40 10-20 12-26 Loam, clay loam, gravelly loam CL, GC, SC A-6 0 0-10 65-100 60-100 55-95 40-75 30-40 10-15 26-60 Extremely gravelly sand, very gravelly loamy sand, very gravelly sand GM, GP, GP-GM A-1 0 10-30 25-60 15-50 10-35 0-15 0-14 NP 509B—Enbar loam, 0 to 4 percent slopes Enbar 85 C 0-22 Loam CL-ML A-4 0 0 80-100 75-100 60-85 50-75 20-30 5-10 22-49 Loam, sandy loam CL-ML, ML A-4 0 0 80-100 75-100 60-85 50-75 20-30 NP-10 49-60 Very gravelly sandy loam, very gravelly loamy sand, extremely gravelly sandy loam GM, GP- GM A-1, A-2 0 0-10 25-60 15-50 10-40 5-30 15-25 NP-5 Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 7 of 12 Engineering Properties–Gallatin County Area, Montana Map unit symbol and soil name Pct. of map unit Hydrolo gic group Depth USDA texture Classification Fragments Percentage passing sieve number—Liquid limit Plasticit y indexUnifiedAASHTO>10 inches 3-10 inches 4 10 40 200 In Pct Pct Pct 510B—Meadowcreek loam, 0 to 4 percent slopes Meadowcreek 85 C 0-11 Loam CL-ML A-4 0 0 95-100 90-100 70-95 50-75 20-30 5-10 11-25 Loam, sandy loam, silt loam CL-ML, SC-SM A-4 0 0 95-100 90-100 70-90 40-75 20-30 5-10 25-60 Very gravelly sand, extremely gravelly sand, very gravelly loamy sand GP, GP- GM A-1 0 0-10 25-45 15-35 10-25 0-10 0-19 NP 511A—Fairway silt loam, 0 to 2 percent slopes Fairway 85 C 0-15 Silt loam CL-ML A-4 0 0 100 100 90-100 70-90 20-30 5-10 15-46 Silt loam, loam, silty clay loam CL, CL- ML A-4, A-6 0 0 100 100 85-100 60-90 25-40 5-15 46-60 Sand, gravelly loamy sand, very gravelly sand GP-GM, SM, SP, SP-SM A-1, A-2 0 0-10 40-100 30-100 20-60 0-15 —NP 537A—Lamoose silt loam, 0 to 2 percent slopes Lamoose 85 B/D 0-9 Silt loam CL, CL- ML A-4, A-6 0 0 80-100 75-100 70-95 55-90 25-35 5-15 9-27 Loam, silt loam, gravelly loam CL, CL- ML, GC, GC-GM A-2, A-4, A-6 0 0 55-100 50-100 45-95 30-85 25-35 5-15 27-60 Very gravelly loamy sand, very gravelly sand, extremely gravelly sand GM, GP, GP-GM A-1 0 0-20 25-55 20-50 10-40 0-15 0-14 NP Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 8 of 12 Engineering Properties–Gallatin County Area, Montana Map unit symbol and soil name Pct. of map unit Hydrolo gic group Depth USDA texture Classification Fragments Percentage passing sieve number—Liquid limit Plasticit y indexUnifiedAASHTO>10 inches 3-10 inches 4 10 40 200 In Pct Pct Pct 542A—Blossberg loam, 0 to 2 percent slopes Blossberg 85 B/D 0-15 Loam CL-ML A-4 0 0-10 90-100 85-100 70-95 50-75 25-30 5-10 15-24 Gravelly loam, clay loam, sandy clay loam CL, CL- ML, SC, SC-SM A-2, A-4, A-6 0 0-15 70-100 65-100 50-95 30-60 25-35 5-15 24-60 Very gravelly loamy coarse sand, extremely gravelly loamy coarse sand, very cobbly sand GM, GP- GM, SM, SP- SM A-1 0 30-45 25-75 20-70 10-50 5-20 20-25 NP-5 Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 9 of 12 Engineering Properties–Gallatin County Area, Montana Map unit symbol and soil name Pct. of map unit Hydrolo gic group Depth USDA texture Classification Fragments Percentage passing sieve number—Liquid limit Plasticit y indexUnifiedAASHTO>10 inches 3-10 inches 4 10 40 200 In Pct Pct Pct 556A—Threeriv- Bonebasin loams, 0 to 2 percent slopes Bonebasin 45 B/D 0-4 Muck PT A-8 0 0 100 100 75-95 55-75 —— 4-15 Loam CL-ML A-4 0 0 95-100 90-100 75-95 55-75 25-30 5-10 15-25 Stratified sandy loam to silty clay loam CL, CL- ML, SC, SC-SM A-2, A-4, A-6 0 0 95-100 90-100 60-90 30-70 25-35 5-15 25-60 Very cobbly loamy coarse sand, very gravelly coarse sand, extremely cobbly loamy sand GM, GP- GM, SM, SP- SM A-1 0 10-45 25-60 20-55 10-40 5-15 20-25 NP-5 Threeriv 45 C/D 0-4 Moderately decomposed plant material PT A-8 0 0 100 100 75-95 55-75 —— 4-9 Loam CL-ML A-4 0 0 95-100 90-100 75-95 55-75 25-30 5-10 9-29 Stratified sandy loam to silty clay loam CL, CL- ML, SC, SC-SM A-4, A-6 0 0 90-100 85-100 60-95 35-70 25-35 5-15 29-60 Extremely gravelly loamy sand, very cobbly loamy coarse sand, very gravelly sand GM, GP- GM A-1 0 15-35 35-60 25-55 20-40 5-15 15-20 NP-5 Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 10 of 12 Engineering Properties–Gallatin County Area, Montana Map unit symbol and soil name Pct. of map unit Hydrolo gic group Depth USDA texture Classification Fragments Percentage passing sieve number—Liquid limit Plasticit y indexUnifiedAASHTO>10 inches 3-10 inches 4 10 40 200 In Pct Pct Pct 748A—Hyalite- Beaverton complex, 0 to 4 percent slopes Hyalite 70 C 0-5 Loam CL-ML A-4 0 0-10 95-100 90-100 75-95 55-75 25-30 5-10 5-9 Clay loam, loam, silty clay loam CL A-6 0 0-10 90-100 85-100 75-90 60-80 30-35 10-15 9-17 Clay loam, silty clay loam, gravelly loam CL, GC, SC A-6 0 0-15 65-95 60-90 55-80 40-75 30-35 10-15 17-26 Very cobbly sandy clay loam, very cobbly sandy loam, extremely cobbly sandy loam GM, SM A-2, A-1 0 30-55 35-65 30-60 20-50 10-25 20-35 NP-10 Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 11 of 12 Engineering Properties–Gallatin County Area, Montana Map unit symbol and soil name Pct. of map unit Hydrolo gic group Depth USDA texture Classification Fragments Percentage passing sieve number—Liquid limit Plasticit y indexUnifiedAASHTO>10 inches 3-10 inches 4 10 40 200 In Pct Pct Pct 26-60 Very cobbly loamy sand, very cobbly sand, extremely cobbly coarse sand GM, GP- GM, SM, SP- SM A-1 0 30-55 35-65 30-60 15-40 5-15 —NP Beaverton 20 B 0-5 Cobbly loam CL-ML, SC-SM A-4 0 15-30 75-95 70-90 60-80 45-65 25-30 5-10 5-21 Very cobbly clay loam, very cobbly sandy clay loam, very gravelly clay loam GC, GC- GM, SC, SC- SM A-2, A-4, A-6 0 20-40 45-70 40-60 35-55 20-40 25-35 5-15 21-25 Very cobbly coarse sandy loam GM, GP- GM, SM, SP- SM A-1 0 25-50 30-75 20-65 10-50 5-15 —NP 25-60 Extremely cobbly loamy coarse sand, extremely gravelly sand, very cobbly loamy sand GM, GP- GM, SM, SP- SM A-1 0 25-50 30-75 20-65 10-50 5-15 —NP Data Source Information Soil Survey Area: Gallatin County Area, Montana Survey Area Data: Version 17, Dec 10, 2013 Engineering Properties---Gallatin County Area, Montana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/21/2014 Page 12 of 12