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y <br />Richartl D. Lamm <br />Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />Devid H. Gelches, Eaeculive Director <br />MINED LAND RECLAMATION DI\ <br />DAVID C. SHELTON, Director <br />February 22, 1985 <br />Mr. Richard A. Mills <br />Environmental Engineer <br />Empire Energy Corporation <br />P. 0. Box 68 <br />Craig, Colorado 81626 <br />RE: Review of Eagle No. 5 and 9 Mines, 1983 Hydrologic Monitoring Report, <br />Permit No. CO-044-81 <br />The above referenced report has been reviewed by our office. It was submitted <br />by Empire Energy Corporation (EEC) on March 30, 1984. The text of the report <br />is divided into three sections: Ground Water Monitoring, Surface Water <br />Monitoring, and Impacts and Future Monitoring. The report is well organized <br />and contains all the information required by Stipulation No. 5 of the permit. <br />The report is basically designed to provide for a summary and analysis of raw <br />monitoring data which are submitted to the Division on a quarterly basis. <br />The discussion presented below is a description and analysis of the <br />information within the annual report. Emphasis is placed on comparison of <br />predicted effects of mining with empirical data collected as mining has <br />progressed. <br />Some problems were encountered during review and analysis of the data. For a <br />further explanation, please refer to the Comments and Recommendations section <br />of this document. <br />Tables and figures referenced in this document are contained in the 1983 <br />Annual Hydrologic Report unless specified otherwise. <br />I. GROUND WATER EFFECTS <br />Four sandstone aquifers are monitored at the mine site. They are, in <br />ascending order: The Trout Creek Formation, Middle Sandstone, Twentymile <br />Sandstone, and the lowermost sandstone bench of the White Sandstone. The <br />No. 5 Mine (F Seam) is stratigraphically located between the Trout Creek <br />Formation and the Middle Sandstone. The No. 9 Mine (P seam) is located <br />between the Twentymile Sandstone and the White Sandstone. <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (303) 866-3567 <br />