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WATER WORK <br /> METHOD OF SOIL CLASSIFICATIOfV <br /> MAJUR DIVISIL7NS SYMBOLS TYPICAL NAMES <br /> GW FELL GRADED GRAVELS OR GRAVEL-SAND MIXTURES, L?TILE OR AA FINES <br /> a GRAVELS <br /> u rsP Fie` POORLY GRADED GRAVELS OR GRAVEL-SAND MIXTURES LITTLE M NO FINES <br /> In" <br /> 04mE fuAN 1/2 IF <br /> GM SILTY GRAVELS, GRAVEL-SAND-SILT MIXTURES <br /> q u CCARSE FRACT04 ) <br /> 4 SIEVE SIZE) o <br /> GC c CLAYEY GRAVELS GRAVEL-SAND-CLAY HIXTURES <br /> J <br /> l^`a Swy VELL GRAM) SANDS OR GRAVELY SANDS, LITTLE OR NO FINES <br /> SANDS <br /> 3 $pf POORLY GRADED SANDS OR GRAVELY SANDS LITTLE OR NO FINES <br /> RARE THM 1/2 CF <br /> V CpARCE FRACT10R C SM SILTY SAND$, SAND-SILT MIXTURES <br /> NEL - <br /> - - - SC CLAYEY SANDS, SAND-CLAY MIXTURES <br /> 1 <br /> ML iii INORGANIC SILTS AND VERY FINE: SANDS, ROCK FLOWER, SILTY OR CLAYEY <br /> .- J SILTS `!'x CLAYS i,!; FINE SANDS DR CLAYEY SILT Vf ITH SLIGHT PLASTICITY - <br /> 8 CL INORGANIC CLAYS OF LDV TD MEDIUM PLASTICITY, GRAVELY CLAYS, <br /> LL<50 SANDY CLAYS, SILTY CLAYS, LEAN:LAYS <br /> bi r - �i,l� CRGAMIC SILTS AND ORGANIC SILTY CLAYS OF LOW PLASTICITY <br /> i'i', <br /> ¢, ¢ �fH INORGANIC SILTS, MICACEOUS QR DIATOMACECOUS FINE SANDY OR SILTY <br /> LD <br /> SOILS, ELASTIC SILTS <br /> a H SILTS CLAYS <br /> Z s CH INORGANIC CLAYS OF HICK PLASTICITY, FAT CLAYS <br /> LL;50 <br /> U- <br /> CH ��� ORGANIC CLAYS GF MEDIUM TO NIGH PLASTICITY, ORGANIC SE-TY CLAYS, <br /> i :f� ORGANIC SILTS <br /> HIGHLY ORGANIC SOILS ,0t PEAT AMD OTHER H[Cil{.Y ORGANIC SO4S <br /> ` CLASSIFICATION CHART <br /> C UNIFIED SOIL CLASSIFICATION SYSTEM ) - - <br /> 1. RANGE OF GRAIN SIZES <br /> CLASSIFICATION U.S. STANOARD GRAIN SITE SANDS AND GRAVELS BLOWS/FDD7 <br /> _mEvE SIZE 1N HILLIta=TEFY- - - <br /> ., BOULDERS ADaVE 12' - A'ROVC I3' - VERY LOOSE B 4 - - <br /> LOOSE 4 - 10 <br /> COBBLES 12' Tp 3' 309 TO 76.2 EDIUM DENSE 70 - 30 <br /> GRAVEL DENSE 10 50 <br /> ` 3• TO N0, 4 76.2 TO 4.76 VERY DENSE <br /> a COARSE �' TD I/s• 762 i0 19.1 OVER 50 <br /> FINE 3/4' 10 NO, 4 - 4.76 <br /> RELATIVE .DENSITY <br /> SAND Na. 4 TO NO. 200 4.760 f0 0.074 <br /> COARSE NO, 4 fO NO. IO 4.760 TO 2100 SILTS AND CLAYS BLOWS/FOOT <br /> MEDIUM NO. W TO NM 40 2000 ICI 0.42p <br /> FINE Pa 40 TO N3, 2CO 0.420TO OD74 VERY SOFT 0 _ g <br /> .. I ;. SOFT <br /> SILT a_ CLAY BELOW NO. 200 DELOW 0074 M©IUM STIFF 4 - B _ <br /> STIFF - -- B - l6 <br /> GRAIN SIZE CHART VERY STIFF <br /> 16 - 32 <br /> - - - - HARD OVER 32 - <br /> S <br /> * <br /> NUMBERIHO.D. (1-3/8 OF BLOWS I CH4LIIJD-PLITp PO ON (STM O-[586). <br /> GHES TO DRIVE A CONSISTENCY <br />