Laserfiche WebLink
UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS SYMBOLS TYPICAL <br /> GRAPH I LETTER DESCRIPTIONS <br /> CLEAN 'O "6.- <br /> WELL GRADED GRAVELS GRAVEL <br /> GRAVEL GRAVELS ��a 0i. Q W SAND MIXTURES LITTLE OR NO <br /> FINES <br /> AND <br /> GRAVELLY POORLY GRADED GRAVELS <br /> SOILS �• �• <br /> (LITTLE OR NO FINES) � ��i � GP GRAVEL SAND MIXTURES LITTLE <br /> S�1♦ OR NO FINES <br /> COARSE <br /> GRAINED GRAVELS WITH ' ' SILTYGRAVELS GRAVEL SAND <br /> SOILS MORE THAN 506 FINES GM SILT MIXTURES <br /> OF COARSE <br /> FRACTION <br /> RETAINED ON NO <br /> 4 SIEVE (APPRECIABLE G+G. CLAYEY GRAVELS GRAVEL SAND <br /> AMOUNT OF FINES) CLAY MIXTURES <br /> CLEAN SANDS Cs`W WELL GRADED SANDS GRAVELLY <br /> MORE THAN 50'!e SAND SANDS LITTLE OR NO FINES <br /> OF MATERIAL IS AND <br /> LARGER THAN SANDY ' <br /> NO 200 SIEVE SOILSPOORLY-GRADED SANDS <br /> SIZE (LITTLE OR NO FINES) SP GRAVELLY SAND LITTLE OR NO <br /> FINES <br /> SANDS WITHSILTYSANDS SAND SILT <br /> MORE THAN 50% FINES SM MIXTURES <br /> OF COARSE <br /> FRACTION <br /> PASSING ON NO <br /> 4 SIEVE (APPRECIABLES.G. CLAYEY SANDS SAND CLAY <br /> AMOUNT OF FINES) MIXTURES <br /> INORGANIC SILTS AND VERY FINE <br /> M L SANDS ROCK FLOUR SILTY OR <br /> CLAYEY FINE SANDS OR CLAYEY <br /> SILTS WITH SLIGHT PLASTICITY <br /> SILTS INORGANIC CLAYS OF LOW TO <br /> FINELIQUID LIMIT MEDIUM PLASTICITY GRAVELLY <br /> GRAINED AND LESS THAN50 CL CLAYS SANDY CLAYS SILTY CLAYS <br /> CLAYS —— — LEAN CLAYS <br /> SOILS <br /> O L ORGANIC SILTS AND ORGANIC SILTY <br /> CLAYS OF LOW PLASTICITY <br /> MORETHAN50% INORGANIC SILTS MICACEOUSOR <br /> OF MATERIAL IS M H DIATOMACEOUS F{NE SAND OR <br /> SMALLER THAN SILTY SOILS <br /> NO 200 SIEVE <br /> SIZE SILTS <br /> LIQUID LIMIT INORGANIC CLAYS OF HIGH <br /> AND GREATER THAN 50 CH PLASTICITY <br /> CLAYS <br /> ORGANIC CLAYS To <br /> Q H NIGH PLASTICITY00 ORGANIC MEDIUM <br /> HIGHLY ORGANIC SOILSp-f PEAT HUMUS SWAMP SOILS WITH <br /> HIGH ORGANIC CONTENTS <br /> NOTE DUAL SYMBOLS ARE USED TO INDICATE BORDERLINE SOIL CLASSIFICATIONS <br /> GRAIN SIZE CHART SAMPLE DESIGNATION <br /> Classification Range of Grain Sizes <br /> US Standard Grain Size Recovery <br /> Sieve Size In Millimeters <br /> Boulders Above 12" Above 305 Continuous Core Sample Interval <br /> Cobbles 12"to 3" 305 to 76 2 Drive Sample Interval <br /> Gravel 3"to No 4 76 2 to 7 76 NR No Recovery <br /> Coarse 3"to V4" 76 2 to 4 76 <br /> Fine 3/4 to No 4 19 1 to 4 76 ND Not Detected <br /> Sand No 4 to No 200 4 76 to 0 074 Q First Water(bgs) <br /> Coarse No 4 to No 10 4 76 to 2 00 <br /> Medium No 10 to No 40 2 00 to 0 420 1 Stabilized Water Level (bgs) <br /> Fine No 40 to No 200 0 420 to 0 074 <br /> Slit&Clay Below No 200 Below 0 074 <br /> SECOR <br /> lWernarsand 1marporwed <br />