1985-06-14_REVISION - C1981012 (2)

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Mr Dave Stout - 2 - June 14, 1985 Tables 1 and 2 define a revised monitoring plan acceptable to the Division. The last three sites have been revised from the original requirements of Stipulation No. 3 for the Permit Revision No. 1 of the New Elk Mine. The operator should understand that this program is separate from the NPDES requirements and does not negate any requirements of that permit. Wyoming Fuel Company's response to Stipulation No. 9 of the New Elk Mine and Stipulation No. 6 of the Golden Eagle Mine is considered to be a part of the technical revision requesting reduction in monitoring. The Division agrees that a reduction in the monitoring of springs and seeps within the one mile perimeter of the permit boundaries is now warranted. The Division proposes a modification to the company's request for no monitoring to a once a year survey of springs numbered 12 - 19. the Santistevan Flume site has been previously covered. These 8 springs must be surveyed in August of each year, the high flow month in the previously submitted data. Also, Wyoming Fuel should clarify the discrepancy between springs located on the Preliminary Spring-Seep Survey Map submitted in March of 1984 and the map submitted for the Technical Revision. • During the review of the Annual Hydrologic report, the monitoring requirements for Pete Canyon were also reevaluated. The references to Pete Canyon in Stipulations No. 12 and 14 are revised as follows. Stipulation No. 12 PRIOR TO INSTIGATING MINING ACTIVITY WITHIN 400 FEET OF THE DRAINAGE BASIN BOUNDARY OF PETE CANYON, WYOMING FUEL COMPANY MUST SUBMIT A MINIMUM OF ONE YEAR OF BASELINE DATA FROM AN ALLUVIAL WELL IN THE LOWER REACHES OF PETE CANYON. THIS WELL MUST BE MONITORED FOR MONTHLY GROUND WATER LEVELS AND QUARTERLY FIELD PARAMETERS. Stipulation No. 14 PRIOR TO SECONDARY OR RETREAT MINING WITHIN 400 FEET OF THE DRAINAGE BASIN BOUNDARY OF PETE CANYON, THE APPLICANT SHALL PROVIDE A DESCRIPTION OF STREAM FLOW CHARACTERISTICS AND WATER USE IN PETE CANYON. I will be pleased to discuss these requirements with you, should you have any questions. If this schedule is acceptable to you, please reply and the technical revision can be approved. Sincerely, Candace M. Thompson Hydrologist CMT/sjv 1319E