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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> w <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 /> GRAVELS WITH LITTLE <br /> OR NO FINES <br /> ` POORLY-GRADED GRAVELS,GRAVEL-SAND <br /> (More than half of o G P MIXTURES WITH LITTLE OR NO FINES <br /> coarse fraction O <br /> is larger than <br /> the#4 sieve) SILTY GRAVELS,GRAVEL-SILT-SAND <br /> GRAVELS ISM MIXTURES <br /> COARSE WITH OVER <br /> GRAINED 12% FINESGC CLAYEY GRAVELS,GRAVEL-SAND-CLAY <br /> SOILS MIXTURES <br /> (More than halt S+W <br /> WELL-GRADED SANDS,SAND-GRAVEL <br /> of material CLEAN SANDS MIXTURES WITH LITTLE OR NO FINES <br /> is larger than SANDS WITH LITTLE <br /> the#200 sieve) (More than half of OR NO FINES <br /> coarse fraction SP POORLY-GRADED SANDS,SAND-GRAVEL <br /> is smaller than MIXTURES WITH LITTLE OR NO FINES <br /> ~ the#4 sieve) <br /> SM SILTY SANDS,SAND-GRAVEL-SILT MIXTURES <br /> SANDS WITH <br /> ~ OVER 12% FINES <br /> SICCLAYEY 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 CLAYSCL INORGANIC CLAYS LOW TO MEDIUM <br /> PLASTICITY,GRAVELLY <br /> Y CLAYS,SANDY CLAYS, <br /> (Liquid limit less than 50) SILTY CLAYS,LEAN CLAYS <br /> FINE <br /> GRAINED _ ORGANIC SILTS&ORGANIC SILTY CLAYS <br /> SOILS OL OF LOW PLASTICITY <br /> (More than half MH INORGANIC SILTS,MICACEOUS OR <br /> of material DIATOMACEOUS FINE SAND OR SILT <br /> is smaller than <br /> the#200 sieve) SILTS AND CLAYS <br /> CH INORGANIC CLAYS OF HIGH PLASTICITY, <br /> (Liquid limit greater than 50) FAT CLAYS <br /> ORGANIC CLAYS&ORGANIC SILTS <br /> OH OF MEDIUM-TO-HIGH PLASTICITY <br /> PEAT,HUMUS,SWAMP SOILS WITH HIGH <br /> HIGHLY ORGANIC SOILS <br /> PT ORGANIC CONTENT <br /> e <br /> UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> a <br /> kn K L E I N F E L D E R SIKH TEMPLE <br /> N 4 <br /> h Drafted By: G. GOMEZ Project No.: 59149.G01 <br /> r Date: 8/30/2005 File Number: ST05G159 <br /> c°urun wdnawa.m°.tom <br />