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RELATIVE DENSITY - COARSE GRAINED SOILS RELATIVE SPT N-VALUE D&M SAMPLER D& DENSITY (140lbs hammer) 1300 VERY LOOSE < 4 < 1 1 LOOSE 4-10 11 - 26 MEDIUM DENSE 10 - 30 26 - 74 DENSE 30 - 50 74- 120 VERY DENSE > 50 > 120 CONSISTENCY - FINE GRAINED SOILS USCS GRAIN SIZE SAND Fine #200 - #40 (.425 mm) Coarse # 10 - #4 (4.75 mm) GRAVEL Fine #4 - 0.75 inch Coarse 0.75 - 3 inch COBBLES 3 - 12 inches CONSISTENCY SPT N-VALUE D&M SAMPLER (140lbs hammer) D&M SAMPLER (300lbs hammer) POCKET PEN. / UNCONFINED (TSF) MANUAL PENETRATION TEST VERY SOFT < 2 < 3 < 2 < 0.25 Easy several inches by fist SOFT 2-4 3-6 2-5 0.25-0.50 Easy several inches by thumb MEDIUM STIFF 4-8 6-12 5-9 0.50-1.00 Moderate several inches by thumb STIFF 8-15 12 - 25 9- 19 1.00-2.00 Readily indented by thumb VERY STIFF 15 - 30 25 - 65 19 - 31 2.00-4.00 Readily indented by thumbnail HARD > 30 > 65 > 31 > 4.00 Difficult by thumbnail UNIFIED SOIL CLASSIFICATION CHART MAJOR DIVISIONS GROUP SYMBOLS AND TYPICAL NAMES GRAVELS: 50% CLEAN GW Well-graded gravels and gravel-sand mixtures, little or no fines. COARSE- or more GRAVELS GP Poorly-graded gravels and gravel-sand mixtures, little or no fines. GRAINED SOILS: retained on GRAVELS WITH GM Silty gravels, gravel-sand-silt mixtures. More than the No. 4 sieve FINES GC Clayey gravels, gravel-sand-clay mixtures. 50% retained SW Well-graded sands and gravelly sands, little or no fines. on No. 200 SANDS: 50% or CLEAN SANDS SP Poorly-graded sands and sands, little or no fines. gravelly sieve more passing th N 4 i SANDS WITH SM Silty sands, sand-silt mixtures. e o. s eve FINES SC Clayey sands, sand-clay mixtures. FINE-GRAINED ML Inorganic silts, rock flour, clayey silts. SOILS: LIQUID LIMIT LESS THAN 50 CL Inorganic clays of low to medium plasticity' lean clays Less than LT D S OL Organic silt and organic silty clays of low plasticity. 50% retained I AN CLAY MH Inorganic silts, clayey silts. on No. 200 LIQUID LIMIT 50 OR GREATER CH Inorganic clays of high plasticity, fat clays. sieve OH Organic clays of medium to high plasticity. HIGHLY ORGANIC SOILS PT Peat, muck, and other highly organic soil. MOISTURE CONTENT STRUCTURE DRY: Absence of moisture, dusty, dry to the touch STRATIFIED: Alternating layers of material or color > 6mm thick. DAMP: Some moisture but leaves no moisture on han d LAMINATED: Alternating layers < 6mm thick. MOIST: Leaves moisture on hand FISSURED: Breaks along definate fracture planes. WET: Visble free water, usually saturated SLICKENSIDED: Striated, polished, or glossy fracture planes. BLOCKY: Cohesive soil that can be broken down into small PLASTICITY DRY STRENGTH DILATANCY TOUGHNESS angular lumps which resist further breakdown. ML Non to Low Non to Low Slow to Rapid Low, can't roll LENSES: Has small pockets of different soils, note thickness. CL Low to Med. Med. to High None to Slow Mediu m MH Med. to High Low to Med. None to Slow Low to Med. HOMOGENEOUS: Same color and appearance throughout. CH Med. to High High to V.High None High LIST OF ABBREVIATION & EXPLANATIONS SPT Standard Penetration Test split barrel sampler G Grab sample D&M Dames and Moore sampler MC Moisture Content LL Atterberg Liquid Limit MD Moisture Density PL Atterberg Plastic Limit UC Unconfined Compressive Strength PP Pocket Penetrometer VS Vane Shear EXPLORATORY KEY CAPITAL HILL PUD EUGENE, OREGON tGI an ch NEERING= CAPITAL DRIVE EUGENE, OREGON SEPTEMBER 30, 2016 9M. PROJECT NO. 14-020 310 5th Street, Springfield OR 97477 1 p: 541.746.0637 1 www.branchengineering.com