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ZI. Compliance with Colorado Sur Pace Coal Mining Reclamation Act <br />CRS 1973, as amended 34-33-101, et. sue., <br />and the <br />Rules and Re ula ti ons Issued Pursuant to the Act <br />This includes a listing of the particular provisions of the regulatory program which were <br />examined during the course of this inspection, and identifies enforcement actions taken <br />during the inspection for failure Co comply with the Rules and Regulations, the Act and <br />the permit. <br />4.01 Urrat rw-rMt Q.c~r~~-a...~t..'~5 <br />A copy of the permit document is on file in the mine office. <br />4.05 Hydrologic Balance <br />Based on the operator's calculated flows and the cross-sections of the Newlin Creek, <br />the proposed diversion ditch around the oId Canon National pit would have to be enlarged <br />from 10' wide to 40-50' wide. Civen the minimal snowfall and related runoff and the <br />minimal rainfall to date, the Division recommends that rather than constructing an <br />appropriately sized diversion ditch, the operator begin at once to backfill and reclaim <br />the pit as described in GEC's letters of November I1, 1980, January 7, 1981 and January <br />15, 1981 in accordance witJ~ the following time schedule: Backfilling of the portals, <br />pit, and the diversion ditches will be complete by August 31, 1981; Reconstruction of <br />the stream channel, final smooth grading, and the redistribution and chemical analysis <br />of topsoil will be completed by September 30, 1981; Topsoil amendment and conditioning, <br />seedbed preparation, seeding, and mulching of the entire disturbed area will be <br />completed by October 31, I981. Because there'wi11 not be any allowance for settling <br />of the fill material, a consolidation prediction, based on a maximum dry density deter- <br />mination (ASTM D-698 Proctor Method) and saturation under Ioacling, will be necessary <br />to establish the minimum permissible compaction for material placement. Once this <br />minimum compaction is determined, field testing by an appropriate professional during <br />fill placement will be required. <br />The construction of the diversion channel around the D.am "D" area has been <br />completed. Riprap of the diversion embankment looks yoocl, but the transition into <br />the diversion channel looks constricted and makes a GO-70o turn. Should this construction <br />prove inadequate, the operator will be required to reconstruct. At the mouth of the <br />diversion channel, where flow enters the Magpie Creek diversion channel, the riprap <br />Iooks good, but the height of the Magpie Creek diversion channel bottom has been raised. <br />4.06 Topsoil <br />plan. <br />Topsoil salvage South of the active pit is proceeding as described in the approved <br />VARIANCE FROM THE RE(JUIREhfENT FOR TOPSO IT SA I,VAGE is lie reby granted for the portions <br />of Phases Z and II where the western hill slopes excer_d IV:111. <br />9.08 Et(~IoSrvc4 <br />Blasting records are being maintained in compliance with 4.08.5; public notice <br />must be republished in accordance with 4.08.3(2). No flyrock problems reported; amount <br />of explosives detonated per 8 millisecond period is very conservative (one hole <br />detonation/25 millisecond delayl. tJarning signals were quite audible at a distance of <br />approximately 1 mile under calm conditions. <br />