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iii iiiiiiiiiiiiiiii <br />999 <br />Gros was <br />i~ CONPOBNTION <br />A Cyprus Amax Comparry <br />February 29, 1996 <br />Doc Date:12f11/2001 <br />Ms. Erica S. Crosby <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />P.O. Box 68 <br />Craig, Colorado 81626 <br />(970) 824-8246 <br />t7 [•rCll /Li~~ <br />MAR p 9 ryy6 <br />~ivsion o; ~wurefdis a ~C~~o.9,v <br />Re: DMG Permit C-81-044, Cyprus Empire Corporation (CEC) <br />Response to Division Letter of January 3, 1996 <br />Dear Ms. Crosby: <br />This letter responds to the monitoring data requests as outlined in the Division's <br />January 3, 1996 letter. CEC has reissued the 1994 Annual Hydrology Report (AHR) in <br />which most of the issues raised in the letter are addressed. The enclosed reissued <br />report inGudes revised text, and new figures, tables and appendices. The only items <br />that are not reissued are the large format figures. We have included labels and an <br />instruction sheet to change the figure numbers on these large format sheets. <br />~ Resoonse to Saecific Comments <br />1. The contour map of the Middle Sandstone Potentiometric Surface shows a westerly <br />gradient while the text indicates a southerly gradient. <br />The text has been changed to indicate the southwest to west-southwest <br />gradient of the Middle Sandstone potentiometric surface (Page 4). <br />2. The TDS value of 1474 mg/L for post-mining water quality does not appear to be in <br />the PHC of the permit. <br />The permit will be revised at the time of the mid-tens review to reFlect this new <br />value. <br />3. 1?age 8 of the PHC (?) refen;nces alluvial well figures that are not included in the <br />PHC (?). <br />Figures 19 and 21 showing historic water levels and conductivity levels are <br />inGuded with this transmittal. In addition, the Williams Fork Alluvium Potentiometric <br />Surface map (new Figure No. 20) was inGuded in the original submittal of the 1994 <br />AHR. <br />~ 4. The flow data for the No. 1 Strip Pit was not included in the report. <br />The flow data for the No. 1 Strip Pit is presented in Appendix 4. <br />