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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS USCS TYPICAL <br /> SYMBOL DESCRIPTIONS <br /> GW WELL-GRADED GRAVELS GRAVEL SAND <br /> CLEAN GRAVELS —= MIXTURES WITH LITTLE OR NO FINES <br /> WITH LITTLE <br /> GRAVELS OR NO FINES = GP POORLY GRADED GRAVELS, GRAVEL-SAND <br /> (More than half of = MIXTURES WITH LITTLE OR NO FINES <br /> coarse fraction =� <br /> is larger than -_� GM SILTY GRAVELS GRAVEL-SILT SAND <br /> the #4 sieve) GRAVELS -- MIXTURES <br /> COARSE <br /> WITH OVER _` <br /> GRAINED 12% FINES GC CLAYEY GRAVELS GRAVEL SAND CLAY <br /> SOILS MIXTURES <br /> ;RNA <br />' (More than half _ WELL GRADED SANDS SAND GRAVEL <br /> of material - - SW MIXTURES WITH LITTLE OR NO FINES <br /> Is larger than CLEAN SANDS = <br />' the #200 sieve) WITH LITTLE <br /> SANDS OR NO FINES SP POORLY-GRADED SANDS SAND GRAVEL <br /> (More than half of MIXTURES WITH LITTLE OR NO FINES <br /> coarse fraction <br /> is smaller than SM SILTY SANDS SAND GRAVEL-SILT MIXTURES <br /> the #4 sieve) SANDS WITH <br /> OVER 12% FINES <br /> SC CLAYEY SANDS, SAND GRAVEL CLAY MIXTURES <br /> INORGANIC SILTS&VERY FINE SANDS <br /> ML SILTY OR CLAYEY FINE SANDS <br /> CLAYEY SILTS WITH SLIGHT PLASTICITY <br /> SILTS AND CLAYS INORGANIC CLAYS OF LOW TO MEDIUM <br />' CL PLASTICITY, GRAVELLY CLAYS SANDY CLAYS <br /> (Liquid limit less than 50) SILTY CLAYS LEAN CLAYS <br /> FINE <br /> GRAINED OL ORGANIC SILTS& ORGANIC SILTY CLAYS <br /> SOILS OF LOW PLASTICITY <br /> (More than half INORGANIC SILTS, MICACEOUS OR <br /> of material MH DIATOMACEOUS FINE SAND OR SILT <br />' Is smaller than <br /> the #200 sieve) SILTS AND CLAYS <br /> CH INORGANIC CLAYS OF HIGH PLASTICITY <br />' <br /> FAT CLAYS <br /> {Liquid limit than 50} <br /> OH ORGANIC CLAYS&ORGANIC SILTS <br /> OF MEDIUM TO-HIGH PLASTICITY <br /> LOAMS UNDER USDA SOIL CLASSIFICATION SYSTEM <br /> SOIL OF APPROXIMATELY EQUAL SAND/SILT/CLAY <br /> UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> N <br /> k" KLE1 N FELDER <br />' o GRANITE CONSTRUCTION COMPANY <br /> o Drafted By DWA Project No 20 1108-24-E01 10500 HARLAN ROAD A- 1 <br /> Y Date 218199 File Number FRENCH CAMP, CALIFORNIA <br /> Copyright Kleinfelder Inc 1999 <br />