_REVISION - M1980244 (31) - Laserfiche WebLink

Home Browse Search

_ l'e err:: ~d~:._ .1 a;,; _ ' .. ~; , ~. i3 P„ ~ .:'f ~$y the operator's own count there will be an excess of 388,900 cubic yards ofgrowth medium. r i~lplease explain where the extra soil will bo placed. ., Response: Additional growth medium that may be available near the end of reclamation will be placed on the last areas to be reclaimed. Any "extra" soils will be stockpiled, if necessary, at any of the designated soilsto~kpiles or in temporary stockpiles that would be located as appropriate for the topographic and surface;water runoff characteristics at the time the sail was encountered and initially removed. 1. ~ ~Itits also the understanding of the Division that, included in thefnancia! warranty is ten tons of lime per acre amendment to the growth medium fvr plant growth in the upper 2 feet of topsoil, for the''overburden storage areas, in the event the required vegetation cover can oat be established. Response: Thc.OMLR's understanding is correct. It should be noted that the financial warranty calculations include-not only the AGOSA and the SGOSA, but also include lime addition in the upper 2 feet of growth medium for the overburden storage areas in the Mein Cresson Mine Area and the East GYesson Mine Area. Finally, as the OMI.R will recall from the Amendment No. 7 process; a financial warranty aiitount for liming was requested 6y the OMLR and agreed to by CC&V to address a hypothetical chncerti Ghat mining activities ceased prematurely, exposed overhurden material needed to be limed, and the OfvLI:R would undertake the reclamation. That is, as discussed in Amendment No. 7, the liming was addedto the financial warranty "...in order to provide the OMLR assurance that there will be adequate financial warranty for this low probability, and interim or temporary occurrence of adversely acid subsoilq..." The financial warranty was conservatively calculated to indudc all overburden storage areas.-'~lowever, there is no commitment or requirement for liming as pan of CC&V's reclamation acttvities unless it is determined that the revegetadon objectives will not be achieved. C On,Section 11.3.1 Grading and Ripping, ".The graded slopes of overburden storage areas and disturbed areas other than mine walls will be jlnal-graded to overall slopes which are generally 1.5Fl:1.0Y or less, unless steeper slopes are required to blend with the surrounding topography or to create irregular land farms with a more natural appearance. The Financial Warranryjor the overburden used a 2.5H.~.I:OV overall slopes. Any changes to the approved slopes will require a Division approval, Response: 'The; description of graded slopes for reclamation is virtually identical to the descriptions approved in Amendment No. 7. The intent of the reclamation plan is to achieve slopes that reflect, to the extent pQSSible,~the native terrein. Tn addition, when blending the reclaimed areas to the surrounding terrain, the native topography is often not exactly 2.SH:1V in all places. It may be steeper or gentler, In order to adhi~ve a natural looking post-mining topography and blend into the native terrain, it is necessary and appropriate for slopes to be varied within the overall 2.5:1 criteria. T'ttis is achieved by malting short lengtlis.of slope slightly steeper or shallower than 2.5:1. However, the overall slope of 2.5:1 is m~irttaikted as described in Section 11.0 of the Amendment No. 8 application. Overall slopes steeper than those described in the Amendment No. 8 application will be presented to the OMLR for review and approval. D, UndertA4M 07, the operator had agreed to place a Moat high (minimum) chain ltnkfence installed arounrJy the Crest of those portions rrf the mines where highwalls ofgrearer fhan approximately 30-feet ('height o depth exists'). However, under this Amendment, the operator is proposing to place a siz- foot high fence around the crest of those portions of the mine where highwalls ofgreoter fhan 100 feet in height exists. Why was this changed? Please explain. The Division would prefer a safety bench, wherever possible. a ,; Response:; Tlie highwall height was inadvertently changed to 100 feet and should be the same height as appcdVed in Amendment No. 7, which is 30 feet. CC&V will place a 6-foot (minimum) chain link fence ~; . ; ;; i~i<,.