2004-05-05_REVISION - M1984026 - Laserfiche WebLink

Home Browse Search

STATE OF COLORADO DIVISION Of MINERALS AND GEOLOGY Department of Natural Resources 1313 Sherman St., Room 215 Denver, Colorado 80203 Phone: (303) 86b-35b7 FAX: (303) 832-8106 ,f~ ~irj . R1gyF~~~~~~. ara~ y,,]~ ~ih, ''S7~ COLORADO DIVISION O F MINERALS GEOLOGY REC LAMATION•MINING SAFETY.SCIENCE May 5, 2004 .~ Jce Gagliano L J Development, Inc. 154 Tiffany Ct. Pueblo, CO 81005 ~ , Re: Del Norte Pit, Permit M-1984-026, Amendment AM-O1, Adequacy Review Letter. Deaz Mr. Gagliano, BIII GWenS Governor Russell George Executive Direttar Ronald W. Cattany Division Direttor Natural Resource Trustee I have reviewed the above-named amendment application, and overall find it well-prepared and straightforward. There are a few small items that need to be clarified, however, though they should not be difficult. I have arranged my comments in the paragraphs below in the order of the exhibit to which they pertain. Please arrange or label your responses similarly to facilitate their review. Exhibits not noted herein are considered adequate at this time. Exhibit A - Legal Description (Rule 6.4.1) The description contains one small error in the metes and bounds of the boundary. The line reading "90° AZ 1301 feet, thence" should be corrected to read "358° AZ 1301 feet, thence...." This incorrect azimuth is contained on all maps in the amendment also (on the east end of the added parcel). The maps need not all be replaced, however, if you can provide a statement clarifying how the mistake should be corrected. Exhibit C -Pre-mining and Mining Plan Maps (Rule 6.4.3) The mining plan map delineates the existing pits and the proposed pit. The proposed pit will avoid excavating completely around the overhead powerpoles, but will leave them on peninsulas to ensure future access by the utility owner. On the map delineations, a lazge area that is shown to be currently excavated is overlain by a portion of a future peninsula (north of the residence, between the power poles), implying that a large backfill must occur. Please clarify. A similar situation is shown on the map where the south edge of the existing west pit is, again, implying that the south edge will be backfilled. This area does not lie under an overhead powerline, and may be less critical, but it is still uncleaz. Please clarify. The map contains a representative cross-section of the pit slopes, showing them to be 3:1 in the zone of the water line, and 2:1 at depth, in compliance with the pond slope requirement. Am I correct in assuming that pit slopes during the mining phase will be maintained at these gradients? (This is asked since there is no slope information in Exhibit D.) Please describe or depict where the topsoil stockpiles will be located, especially within the amended area. Exhibit D -Mining Plan (Rule 6.4.41 The question about pit slope gradient during mining (in the previous pazagraph) is again asked under this exhibit, and your reply may be included here if you wish. Office of Office of Colorado