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U.S. DEPAR'HE!;T DF•AGRICULiURE • • PAGE 2 OF 3 1; ATURAL~RESC'JRCES CCNSER'JAT:CN SERVICE C3/9/98 'Erdcate -- CC';S'RUCTIC;I MATERIALS COt15'4;C'ID!I "ATER:ALS Th;s reFOr: gives icfor,-..aticc about t".e soils as a source cf roadfi!1, sand, gravel, and topsoil. the soils are •ated "Sccd', 'Fair , cr `Paor as a source of roadfill and topsoil. They are rated as a 'probab:e` cr 'Ir,.probable scurce cf sand and e:avel. the ratings are based or scil F'operties and site features that affec::he removal of the soil and its cse as corstrcctior naterial. M1ornal corpactior„ r.inor processing, an; other standard corstructioc practices are ass~ned. Eact scil is evaluated tc a depth of S cr b feet. =.cadfiil is soi: caterial that is excavated in cne pace ar.d use: id rcatl erban:;-errs in another place. Ir this ;eaort, :he soils are rated as a scurce of roadfill for low erban.rena, gdaerally less than 6 Fee: high. aed less e~aaic; in czsign than. higher d.-.bacY.r.ents. The ratings are fc: ;he soil r.ater:a: below toe surface layer to a dap:h of S c' 6 feet. It is assured that soil layers will bz -fixed u•: -.g excavating and spreading. 'tang soi'.s have taxers ;f co atrastirg suaability .ithir their prof;le. The rep r; enti;:zd Engineering Index Properties is also aca!labls and i; Provides detai:ed info•r,atioa abcct each scil layer. Thi; icforaatioc can help determine Ue saita5i:i:y of each :are• fcr use as roadfill. the pzrfor an:e of soil after it is stab::ized with lire or ceasrt is -ot ;onsideretl in ;5e ratings. 'he •at:ngs are based on soil prcper:ies, sita °eatcres, artl obs?nod pe•fcr-.aace cf the soils. TFe :nickaess of s~: ah:e ndterial a a cajo~ cors:deratio:. r.`e ease cf excavat:o•. is affecteC by large stoves, a figi eater ta51z, a,d s:cpe. doe uea tie soi; parfcrms in place after a 'as bee- corpactzd cad drained is detc^ired by its strength (as :•f?r-ed f•o'. the e-gineeria3 classification cf the s; ii; a°d sb ick-s.:ell pctertiai. iciis raved Gocd' ccntair siyrificart anoarts cf sand cr gravel or bo;h. i~ey have at :east S fee: o` suitable c,:evia:, a :cw s`riak-sue:l Po;ertial, feu co'ccles and stones, and s:opes of l: percent e' less. Cepth to the eater table a pore than 3 fee: ',Sails rted Fair` have lore than ;;S percan: =_ilt- acd clay-sizzc partic:zs net have a Elasticity cf less than 10. 'They `,ave a ioderate shrink-s..ell potential, slcpes o` 15 to 25 percent, or -acy stones. °epth to the ,ater table is ;0 3 fee;. Sol a rated 'Pocr' have a plasticity index of ac*e than :0, a sigh srrL•k-s;ail potan:ial, c,any stones or slcaes of care ;ham 2S per.=. n;. They are wet, and the depth to .he water :ab:e a less than 1 foot. Thase soils nay have lare•s of suitable ~aserial, bc; ;he na:er:a: is less :hay 3 feet :hick. ~Santl and gravel are natu•a] aggregates suitaSl2 far coy:.ercial use :.ith a ci~irui of proczss:ng. Sand and travel are used is .aany kinds o' constriction. Spacif:catiocs fcr zach ase vary widely. .; this raport or:Y ;hz Probab::ity of f.nding naterial io suaab:e quantity is evaluated. the siitabili;y of the -.ater:al for specfic purposes s act evaluated, gar are facto•s that affect ercava:io;. cr the -,a:axial. Tha praper'.ies sec :o zvalaa:e tee sci! as a soiree of sand or grave: are gradatioc o` g;aio sites (as icdicatad by the engNearing c:asst°:caticn o° :he soi 11, thz thicknass of saitab:a r,ate•ia:, cad :he convect of rcck fragn?at s. Ki rs o° rock, acidity, a-.d 5:"d L~iCdt:i1 ate giver :r the soil series d25CriEtiS ls. Gradati o~ c` grai sizes is giver. in the Ergineer!;g L^.c?x P apert:es apart. A 5G1: fdtftl as a 'Prebable~ scrrce hds d lave' Of Ci°.:.'. ed td drd g'd:E: J' a :dy0r Of ad ~: Of grdY2l tf dt ;On;dlyd _. to :2 pe ffct silty fires. 'h.is naterial :•st be at least 3 felt :`.icy. arc less t'aan SO percent, by xeight, :a•ge s:cres. All ether soils are raved as as 'Irrobab:?` scurce. Cc arse fracrerts of scf: badreck, sicn as sha:a ar,d di:;stoae, aye rot ccnsiderec to be sand a d grave;.