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64 ~ SOIL SURVEY TABLE 6.-Engineering ~ Soil series and map symbols Curecanti: CuB .. ..... ... Deauville: De B. DeC Dollard: DoE "Duffson: DrE, DsE For Corpening part of DrE, see Corpening series. For Spring Creek part of DsE, see Spring Creek series. Evanston: EvB. EvD Fola: FoB Ca5 Creek: GaA, GaB Gatl•VICW: GeB, GeE Gold Creek: GrB Hopkins Mapped only with Parlin soils. Irim: IrA, IrB Topsoil Suitability as source of- Sand and gravel Poor: grnvelly and cobbly. Good F'uor: high clay content. Fair: coarse fragments. Fair: clay loam at. n depth of 9 inches. four: high cob- blestone content. Poor: umstl~. poorly drained; high cobble- stone content. I'uor. high cub- blesUme content. Poor: strongly to very strongly alkaline; high sodium content. Poor: high cob- blestone content. Poor: poorly drained. Fair: excessive fines and cobble- stones. Yoor: SM ma- terial below a depth of 22 inches. Unsuitable: fine- grained ma- terial. Unsuitable: fine- grained ma- terial; bedrock at a depth of 20 to 90 inches. Unsuitable: finc- grained ma- terial. Yoor: excessive fines and cobble- stones. Fair: excessive fines and cobble- stones; seasonal high water [able less than 3 feet from surface. Poor: high cob- Mcstonr rontent. Fair for gravel; 40 inches of overburden; seasonal high water table at the surface or within a depth of Afi inches. Unsuitable: fine- grained ma- terial; flagstone at a depth of 10 to 20 inches. Poor for gravel; seasonal high ' water table at ~ the surface or within a depth of 36 inches. Soil features affecting- Road fill fonds and Embank nu•n ts, reservoirs dikes, and levees Good: A-1; many cobblestones. Fair: moderate shrink-swell po- tential; erodible if not confined. Pour: A-7; shale at a depth of 20 to 40 inches; low shear strength. Fair: A-4; fair shear strength: sandstone at a depth of 20 to 40 inches. Fair: A-4; fair shear strength. i, Guod: A-2 or A-1; many cobblestones. Pom•: A-1; seasonal high water table at Icss Lhan 3 feet from zurfacc. Good: A-1; many cobhlc- stones. Pmr: A-7; low shear strength; high shrink- swellpotential; seasonal high water table at the surface or within n depth of 36 inches. Poor: flagstone at a depth of 10 to 20 inches; slope is 5 to 45 percent. Poor: seasonal high water table at the surface or with- in adepth of 36 inches. Rapid permeabil- ity below a- depth of 19 inches. Slope is 1 to 15 percent; mod- erately rapid permeability below a depth of 22 inches. Slope is 5 to 30 percent; slow pcrmenbility. Slope is 5 to 40 percent. ~, Slope is 1 to ^_0 ~, percent. Rapid pet mc- ability. Seasonal high water table at less than 3 feet from surface; rapid per- meability. Rapid permeabil- ity: slope is ° to 30 percent. Seasonal high water table at the surface or within a depth of 36 inches; gravel below a depth of 41 inches. i.ess than 20 inches deep to flagstone; very rapid perme- ability. Moderate perme- ability. Good stability; high compacted permeability. Moderately erod- ible. Iligh shrink-stvcll potential; pour compaction characteristics. Bedrock at a depth of 20 to 40 inches: high piping poten- tial; fair com- paction charac- teristics. Fair sttbility: --+r high piping potential; poor compaction characteristics. I.ow compress-~P ibility; medium compacted per- meability. Seasonal high water table at less than 8 feet from surface. Low cumpress- ihiliLy; medium rnmpacted pcr- mcability. Yom' cnm paction characteristics: high shrink-well potential. Flagstone at a depth of 10 to '20 inches. Good s4~bility; love compacted permeability.