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Lake Front <br /> Ramsey,Minnesota <br /> NTI Project No. 18.MSP05470.000 <br /> CLASSIFICATION OF SOILS FOR ENGINEERING PURPOSES <br /> ASTM Designation D-2487 and D2488(Unified Soil Classification System) <br /> Major Divisions GroupSymbol Typical Name Classification Criteria <br /> N Well-graded gravels and Cu D60/D10 greater than 4. <br /> N <br /> a, GW gravel-sand mixtures,little = <br /> Cz=(D30)2/(D10 x D60)between 1&3. <br /> or no fines. <br /> a Poorly graded gravels and <br /> N .V N <br /> a� GP gravel-sand mixtures,little Not meeting both criteria for GW materials. <br /> `� 0 c U or no fines. o <br /> a� > o z <br /> o Atterberg limits <br /> 0 Silty gravels gravel-sand- N Atterberg limits <br /> .N GM U N below A line,or <br /> 00 0 ( silt mixtures. "' plotting in hatched <br /> 0 _ PE � P.I.less than 4. <br /> •� area are borderline <br /> N o 4- �' "? "? c Atterberg limits <br /> o a �, Clayey ravels,gravel-sand- �, above"A"line classifications <br /> `r' � o � GC y y g � . � requiring use of dual <br /> 0 Ln L clay mixtures. o o with P.I.greater symbols. <br /> than7. y <br /> �7 U Well-graded sands and c .. > a <br /> a� a� Cu=D60/D10 greater than 6. <br /> �; o SW gravelly sands,little or no i a', "' o Cz-(D30)2/(D10 x D60)between 1&3. <br /> +� o <br /> o fines. CL Ln o 0 <br /> U O V) OO N <br /> Q; Q. Poorly-graded sands and H `. z14 ° z <br /> c� <br /> ._ to <br /> o •° v SP gravelly sands,little or no C•N Not meeting both criteria for SW materials. <br /> Q) -0 � -tzt fines. C ro CO <br /> o N � <br /> 0 <br /> o z c 0-� � �' Atterberglimits <br /> N o Atterberg limits <br /> V Silty sands sand-silt o o N r, g <br /> Ln V SM ° below"A"line,or plotting in hatched <br /> V �., mixtures. <br /> •� N o N P.I.less than 4. area are borderline <br /> `f' ° Atterberg limits <br /> v, = g classifications <br /> ra SC Clayey sands,sand-clay ca a o o 4- above"A"line requiring use of dual <br /> 5 cn mixtures. u J " ° with P.I.>7. symbols. <br /> Inorganic silts,very fine <br /> Ln ML sands,rock flour,silty or o <br /> N � <br /> a) clayey fine sands. <br /> O O <br /> � o co <br /> J <br /> vO Inorganic clays of low to Q <br /> o CL medium plasticity,gravelly co <br /> a) �_ clays,sandy clays,silty o <br /> L E clays,lean clays. <br /> .N J = <br /> 0 <br /> 00 U <br /> NCT <br /> O <br /> cn6 OL Organic silts and organic V CO <br /> N silty clays of low plasticity. X o <br /> of <br /> .= N -� <br /> V) a <br /> Q c� Inorganic silts,micaceous o <br /> o J MH or diatomaceous fine sands c o 2 <br /> O <br /> ,� c� 06 <br /> or silts,elastic silts. V <br /> O <br /> a m o M <br /> � U N <br /> No <br /> LD <br /> Inorganic clays of high 0 <br /> M `�' plasticity,fat clays. co a U N <br /> L N U O Q._ J <br /> o y <br /> }+ J U o� <br /> Ln -0J U J <br /> Organic clays of medium to o o J o <br /> OH �� �a� U <br /> high plasticity. C Q 0 N <br /> J <br /> O <br /> U O O O O O O O <br /> , Peat,muck and other `0 U') "t M N <br /> bn c°0 Pt highly organic soils. }!wil A1131}seld <br /> = 0 <br />