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WATER WORK <br /> F <br /> METHOD OF SOIL CLASSIFICATION <br /> MAJOR DIVISIONS ISYMBOLSTYPICAL NAMES <br /> SjV// WELL GRADED GRAVELS OR GRAVEL-SAND MIXTURE& LITTLE OR ND FINES <br /> t N GRAVELS a <br /> u Gp �„° POORLY GRADED GRAVELS OR GRAVEL-SAND MIXTURES, LCITLE OR NO FINES <br /> — > e. <br /> W <br /> amc THAM va cv GM SILTY GRAVELS, GRAVEL-SAND-SILT MIXTURES <br /> N COARSE FRACTION ) <br /> lc1 G 41 * SIEVE O <br /> Z CIc c CLAYEY GRAVELS. GRAVEL-SAND-CLAY MIXTURES <br /> o S V/ V£LL GRADED SANDS DR GRAVELY SAND& LITTLE OR NO FINES <br /> SANDS <br /> z Sp 1". POORLY GRADED SANDS OR GRAVELY SANDS, LITTLE OR NO FINES <br /> Q <br /> GUARS£ FitACTIDN C <br /> (MME THAN v2 OF <br /> SILTY SAND$ SAND-SILT MIXTURES <br /> (--� � <br /> NO 4 SIEVE-'SID <br /> Sc CLAYEY SANDS, SAND-CLAY MIXTURES <br /> ljl��jt u ML INORGANIC SILTS AND VERY FINE SANDS, ROCK FLOWER SILTY ^'R CLAYEY <br /> FINE SANDS OR <br /> SILTS & CLAYS CLAYEY SILTS WITH SL]G�1T PLASTICITY <br /> W "' <br /> INORGANIC CLAYS OF LOW TO MEDIUM PLASTICITY GRAVELY CLAYS, <br /> C4 g CL SANDY CLAYS, SILTY CLAYS LEAN CLAYS <br /> ' N LL<50 <br /> LLJ A QL ORGANIC SILTS AND ORGANIC SILTY CLAYS OF LOW PLASTICITY <br /> q INORGANIC SILT& MICACEOUS OR DIATOMACECOUS FINE SANDY OR SILTY <br /> '6 SILTS & CLAYS MH SOILS, ELASTIC SILTS <br /> u CH INORGANIC CLAYS OF HIGH PLASTICITY FAT CLAYS <br /> LL)50 <br /> LL i, ORGANIC CLAYS OF MEDIUM TO HIGH PLASTICITY. ORGANIC SILTY CLAYS, <br /> CH ���� ORGANIC SILTS <br /> HIGHLY ORGANIC SOILS Pt PEAT AND OTHER HILFLY ORGANIC SOILS <br /> CLASSIFICATION CHART <br /> ( UNIFIED SOIL CLASSIFICATION SYSTEM ) <br /> RANGE OF GRAIN SIZES SANDS AND GRAVELS SLOWS/FQOT <br /> CLASSIFICATION US STANDARD GRAIN SIZE <br /> SIEVE SIZE: IN MILLIMETERS <br /> VERY LOUSE 0 - 4 <br /> ' BOULDERS A813VE 2' ABOVE I3• <br /> Laos£ + - LD <br /> COBBLES 12' TO 3' 305 TO 762 MEDIUM DENSE 10 - 30 <br /> DENSE 30 - 50 <br /> GRAVEL. 3' TO NO 4 762 TO *.76 VERY DENSE OVER 50 <br /> ' COARSE 3' TO 1/4' 762 TO 191 <br /> FINE 3/4' TO NO. 4 191 TO 476 <br /> RELATIVE DENSITY <br /> SAND NO. 4 TO ND. 200 4,760 TO 0074 <br /> NO, 4 TO NM LD 4760 rO 2000 SIL75 AND CLAYS BLOWS/FOOT <br /> COARSE <br /> MEDIUM NO, L0 TO NB, 40 2400 TO 0 420 <br /> FINE "1 40 TI] NR, 200 0.420 r0 0.074 VERY SWT 0 - 8 <br /> SLIFT 2 - 4 <br /> SILT & CLAY BELOW NO 200 BELOW 0474 MEDIUM STIFF 4 - 9 <br /> STIFF 9 - 16 <br /> GRAIN SIZE CHART VERY STIFF 16 - 321 <br /> HARD OVER 32 <br /> + NUMBER OF BLOWS OF 140 POUND HAMMER FALLING 30 INCHES TO DRIVE A CONSISTENCY <br /> 2 INCH OD (I-3/8 INCH IIL) SPLIT SPOON (ASTM D-L5$6) <br /> ' PAGE OF <br />