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x <br /> WATERWORK <br /> METHOD OF SOIL CLASSIFICATION <br /> MAJOR DIVISIONS SYMBOLS TYPICAL NAMES <br /> GT(,f WELL GRADED GRAVELS CR CRAVEL-SAND MIXTURES LITTLE UR Hal FINES <br /> GRAVELS <br /> N -- GP POORLY GRADED GRAVELS OR GRAVEL-SAND MIXTLRES LITTLE CR NO FIhCS <br /> C7� <br /> In oalC THAN lie OrGM SILTY GPAVELS, GRAVLP SA110-SILT MIXTURES <br /> �y« COAKSE FNACIMPI I <br /> N7.4 SIEVE SIZE] <br /> y GC CLAYEY GRAVELS. CR"VfL-SAND-CLAY MIXTUPES <br /> < � <br /> ws S w fy VELL GRADED SANDS OR GRAVELY SANDS,LITTLE OR NO FINES <br /> SANDS <br /> VJ a SP POORLY GRADED SANDS OR GRAVELY SANDS.LITTLE OR ND PINES <br /> Ly <br /> C)yyyI OfYE flim 1/2 Cr SM SILTY SANDS, SAND-SILT MIXTURES <br /> u ly CEMEE FRACTION 4 <br /> !! NCI.4 SIM'+1m <br /> SC CLAYEY SANDS, SArtD-CLAY FQ%TflRCS <br /> kl }� INORGANIC SILTS N43 VERY FINE SAOCS, RACK FLOVCR, SILTY GR CLAYEY <br /> �_ SILTS & CLAYS ML I i I FINE SANDS OR CLAYE'i SILTS WITH SLIGHT PLASTICITY <br /> C7 a CL INORGANIC CLAYS OF LDV TO HEDWR PLASTICITY,GRAVELY CLAYS. <br /> Cn R SANDY CLAYS, SILTY CLAYS, LP-All CLAYS <br /> LL(50 <br /> WOL ORGANIC SILTS AND CRGANIC SILTY CLAYS OF LIIW PLASTICITY <br /> Z� <br /> Q 9 INORGANIC SILTS, MICACEDUS OR DIA10MACECIIUS FINE SANDY OR SILTY <br /> MH SEDLS, CLASTIC SILTS <br /> w SILTS & CLAYS -- <br /> 41 GH O <br /> INORGANIC CLAYS OF HIC34 PLASTICITY,FAT CLAYS <br /> LD50 ORGANIC CLAYS Q" MEDIUM TO HIGH PLASTICITY, ORGANIC SILTY CLAYS, <br /> ❑H i� ORGANIC SILTS <br /> HIGHLY ORGANIC SOILS Pt _ PEAT AND OTHER HIGHLY CN'GANIC SOILS <br /> CLASSIFICATI❑N CHART <br /> C UNIFIED SOIL CLASSIFICATICN SYSTEM ) <br /> RANGE (IF GRAIN SIZES SANDS AND GRAVELS BLOWS/FOOT <br /> CLASSIFICATION US. STANDARD GRAIN SIZE <br /> SIEVE SIZE IN WLLIWTERS VERY LCDSE 0 - 4 <br /> BOULDERS ABOVE 12' AECVC 13' LEESE 4 - 10 <br /> f£D1UH DENSE 10 - 30 <br /> COBBLES 12' TO 3' 305 TO 76.2 DENSE 30 - 50 <br /> GRAVEL 3' TO NO. 4 76.2 TO 4.76 VERY DENSE DVER 50 <br /> COARSE 3' TO 1/4' 762 TO 19.7 <br /> FINE 3/4' 10 NO. 4 L91 to 4,76 RELATIVE DENSITY <br /> SAND NO. 4 10 NR 200 4.760 TO 0.574 SILTS AND CLAYS BLOVS/FOOT <br /> C134RSE NO. 4 TO NO. LD 060 TO 2.DDI <br /> MEDIUM hFI, LO TO NO. 40 2A00 TO 0.420 VERY SOFT 0 - 2 <br /> FINE NIL 40 TO N7, 200 0,420 TU U74 SOFT - 2 - 4 - <br /> MEDIUM STIFF 4 - 8 <br /> SILT g CLAY BELOW NO. 200 BELOW Ofl74 STIFF 0 - L6 <br /> VERY STIFF 16 - 32 <br /> GRAIN SIZE CHART HARD OVER 32 <br /> + NUMBER OF BLOt1S OF 140 POUND HAMMER FALLING 30 INCHES TO DRIVE A CONSISTENCY <br /> 2 INCH O.A. (1-3/8 INCH I,D.) SPLIT SPOON (ASTH 0-1586). <br /> PAGE_____ OF <br />