GENERAL45457 - Laserfiche WebLink

Home Browse Search

iii iiiiiiiiiim m 999 STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY Department of Natural Resources 1313 Sherman 51., Room 21 S Denver, Colorario 80207 Phone: 1303) 866-3567 FAX: (3031 A32-R106 July 12, 1994 Mr. Marcus Middleton Cyprus Empire Corporation P.O. Box 68 Craig, CO 81626 RE: Proposed Mine Expansion Plans at the Eagle Mines Dear Mr. Middleton: ~~j2 ~~~~~ DEPARTMENT OI I NATURAI . RESOURCE`.- Rny Romer covcrnoi lames 5 LochheaA E.eC Wive Director M¢hael B. Long Division Dneao~ (C-81-044) When we recently discussed Cyprus Empire's plans for possible expansion of the Eagle Mine, I told you our staff would offer some guidance as to what facets of baseline data collection would be necessary prior to submittal of permit revisions. Here is a summary of my thoughts, along with the enclosed memo by Barbara Pavlik which discusses hydrology matters. You proposed a scenario in which CEC would submit a series of three technical revisions. The first two revisions would address extension of main entries and development of a z•ock tunnel up to the H seam. A third revision would permit three new longwall panels and addition of associated acreage to the :permit area. The development work could be permitted by one or two technical revisions. However, permitting the new longwall panels would appear to entail addition of 1200-1500 acres to the permit area and mining of a new coal seam in a previously unmined area. This is a significant alteration of the current permit which should be done by means of a permit revision. As I mentioned earlier, it appears that the time :Frames associated with review of two TR's and a PR would not interfere with the projected time frames CEC is considering. The most critical consideration in regard to time, is the adequate collection of required baseline data. Please refer to Barbara's enclosed memo for a general outline of the hydrology baseline topics which should be addressed. CEC will need to collect data over a one year period adequate to characterize the aquifers, streams, and springs mentioned in the memo prior to developing the longwall panels.