1994-02-04_REVISION - M1977347 - Laserfiche WebLink

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February 5, 1994 Division of Minerals and Geology 1313 Sherman Street, Suite 215 Denver, CO 80203 Attn: Mr. Gary Curtiss RE: January Z Adequacy Revelw for Amendment to Permit No. M-T7-347 Dear Gary, The following is !n answer to the points in your Adequacy Review. It is regrettable that we could not have discussed some of the new requests before the letter was written. There appear to be some basic misconceptions about the Slab Canyon quarry, and its operation. EXHIBIT D = inln Plan 1. The future Phase 5 haul road is located outside the amendment boundary because that location will cause the least disturbance. It is not set In stone however, .end actual location will depend upon final engineering and agreement with the landowner. However, since this l:a the most logical location, we will Include this area wltliln the State Permit at this time. 2. HOLNAM accepts that an amendment to this permit will be submitted before disturbance in Phase 4 and Phase 5 areas. We, however, do ask for the permit boundary t:o follow the claim boundaries, plus the road location requested !n Item No. 1. Bonding at t6ts time will tie limited to Phases 1 through 3. 3. The adequacy review states that structures must be ak~le to "handle" the various storms, but "handle" has not been defined In technical terms !n any departmental criteria that I have seen to date. No acceptable release rates have been given by the Division, and the concept of "containment" would be legally unacceptable to downstream water users. Included are additional data and calculations to demonstrate the effectiveness of the proposed reclamation. 4. Ofisite runoYi will be released at a velocity of less than 5 feet per second, and additional drainage details are included. 5. A study of the stability of the loadout benches is Included. The benches will be stable as designed. Gabions, or rock buttresses are not needed. !.