Laserfiche WebLink
UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS SYMBOLS TYPICAL <br /> GRAPH ILETTER DESCRIPTIONS <br /> a <br /> CLEAN °6� C� WELL 133RADED GRAVELS GRAVEL <br /> GRAVEL GRAVELS Q� 6 G W FINES <br /> DMIXTURES LITTLE OR NO <br /> AND ° <br /> GRAVELLY • <br /> SOILS POORLY GRADED GRAVELS <br /> (LITTLEORNOFINES) S•� OP GRAVEL SANDMIXTURES LITTLE <br /> OR NO FINES <br /> COARSE <br /> GRAINED GRAVELSWITH ° ° SILTYGRAVELS GRAVEL SAND <br /> SOILS MORE THAN 50% FINES Q M 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 SW WELL GRADED SANDS GRAVELLY <br /> MORE THAN 50% SAND SANDS LITTLE OR NO FINES <br /> OF MATERIAL IS AND <br /> LARGER THAN SANDY <br /> NO 200 SIEVE SOILS POORLY GRADED SANDS <br /> SIZE (LITTLE OR NO FINES) Sp GRAVELLY SAND LITTLE OR NO <br /> FINES <br /> SANDS WITHSILTY SANDS SAND SILT <br /> MORE THAN 50% FINES `SM MIXTURES <br /> OF COARSE <br /> FRACTION <br /> PASSING ON NO <br /> 4 SIEVE (APPRECIABLECLAYEY SANDS SAND CLAY <br /> • AMOUNT OF FINES) i'mol SC MIXTURES <br /> INORGANIC SILTS AND VERY FINE <br /> III ML SANDS ROCK FLOUR SILTY OR <br /> CLAYEY FINE SANDS OR CLAYEY <br /> SILTS WITH SLIGHT PLASTICITY <br /> SILTS W, INORGANIC CLAYS OF LOW TO <br /> FINE AND LIQUID LIMIT MEDIUM PLASTICITY GRAVELLY <br /> GRAINED CLAYS LESS THAN 50 CL CLAYS SANDY CLAYS SILTY CLAYS <br /> SOILS LEAN CLAYS <br /> OL ORGANIC SILTS AND ORGANIC SILTY <br /> - - GAYS OF LOW PLASTICITY <br /> MORE THAN 50% INORGANIC SILTS MICACEOUS OR <br /> OF MATERIAL IS MH <br /> SMALLER THAN DIATOMACEOUS FINE SAND OR <br /> NO 200 SIEVE SILTY SOILS <br /> SIZE <br /> SILTS <br /> AND LIQUID LIMIT INORGANIC CLAYS OF HIGH <br /> CLAYS GREATER THAN 50 CH PLASTICITY <br /> ORGANIC CLAYS OF MEDIUM TO <br /> 0H HIGH PLASTICITY ORGANIC SILTS <br /> HIGHLY ORGANIC SOILS PT 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 3/4" 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 /> Silt&Cla Befow No 204 Below 0 074 <br /> SECOR <br /> Internatrond Incorporated <br />