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2.05.4 2 ,(c) $ACI{FII.LINC~IVD GRADINI'' $ackfilling and grading plans for the Raton Cree.c: Mine reflex a two ?art reclamation program _ Project 1 will address is.the disturbed azea east'of the prep plant and Project 2 will involve backfilling of the Mine 2 portal ilea and refuse,pile:.,,Rackfilling ud ~:.arlin$ of.Projeci'~l ha4 been completed; .;.,~::: The Prajen ~. alea indudes'approximm~~te~ly 1,300ai, ~ i- fePtolighe~ll-aver;;~iitg app}oximar'ely,r... 50 feet high ,as shovin' o?t' Map ~12, Mine, WPter System. and Kefcse Area ;dap:' -D+se io,thp. limited amount o£available tiackfill material. acid the:sterp,nalursl t~.iain abo~3e the krphwall,,,.;, EFMC proposes to back£tll the highwall with. existing refuse material to achieve a 3I-I:1V slope., :_, Follc~wing placement and final grading of the refuse; the highwaIl azea and remaining iefuse pile - .. will be covered with 4' feet of non-toxic,, noncombustible material; Of the four feet of cover,.;; :, .approximately '4.5 incfies will be fo soil.: The final' highwall aitd~ rerriainin; refuse pile corffiguration azt s own on Fi fvie 17-1, Recfamacioh Project 2 Plan and Pigui is 17-2 'a;id I%-3,, Reclamation Plan 2Cross-Sections: The volume of materials Yequired to' achieve the,poposed pasunining configttsation are as follows: ~` Refuse Material 11;,300 ccy ;~ , • Suitable Cover Material (HighwaIl Area) 32,600 cry ~~.. ~` Suitable Cover Material (Remaining'Refuse Area) 33,300 ccy o Topsoil Material (Highwall Area): , 3,40Q cep m Topsoil'Nfaterial (Retnainirtg Refuse-Area) 3,600 ccy Refuse tnatPSial will come from the e:isting refuse pile. Approximately 59,000 c of suitable soil material will come the _Mine 2 borrow source azea and 6 900 c w:_ come rom t_e y.'a~., orrooy~sQUrce"arsa. Both borrow'source azeas are s own on Figure 17-1. Reclamation Project 2 P anl :: Topsoil-will come from the two existing topsoil stockpiles. .All "volumes were determined by comps-ing the existing topography as shown.oh the Mine Site DVaier System.and Refuse Area Map (Map 12), to the proposed postmitiing surface as shown on t:igure 17-1, Reclamation Prdjea`2 Plan. tPrior to refuse placement.all vegetarion and soil material will be iemoved. All. refuse .inatfrial ~will'be placed in accordance with procedures used for consfruction of the existing refuse pile. :All. refuse will be placed in lifts no greater than 2 feet in vertical thickness and compacted to achieve 90 percent of dry density according to standaid Proctor companion tests. In addttion, prior to placement of cover material the refuse material will be ripped to promote a good.bond between the two materials. The Sover material will be placed pazallel to the contours acid the " surface will be left in a.roughened state in order to minimize wind and water erosion prior to topsoil placement or revegetation. During.construction; a Registered Professional Engineer will inspen the backfilling operation during critical stages of construnion including removal of any organic material or topsoil, placement and companion.of fill material and placement of suitable cover material. In addition, ante every two weeks during cbnstrunion, compaction will be confirmed using.a nuclear den3itp tester: U on tom etion of'the backfill the Registered En ineer will submit a certified report. In .addition, EFCI will sibmir copies or rummaztes of results from the nuclear density testing.- Revised permit -text describing testing and certification procedures is included with these responses for insertion into the permit application. C:\mORIC\i56V56BTAU.RI '~`'• 'o' miovs4 c:iym 513R ~ ; ]a;evised -June 1994