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III IIIIIIIIIIIII III • <br />999 <br />E~~A <br />• ~ Coal Company <br /> <br />Seneca Coal Company <br />October 4, 1995 <br />Ms. Susan Burgmaier <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 RF(;E11/ED <br />Denver, CO 80203-2273 OCT 1 0 <br />1995 <br />Re: Yoast Mine Permit C-94-082, TR1 <br />Division of muierais rs, Geology <br />Dear Ms. Burgmaier: <br />Enclosed please find three copies of an application for TR1 for Seneca Coal Company's (SCC} <br />Yoast Mine. This technical revision addresses Stipulation No. 6. A surface water monitoring <br />site, YSG5, has been placed on Grassy Creek downstream of its confluence with Scotchmans <br />Gulch. In Tab 15; pages 5, 21, and 24 have revised to include this site. Monitoring frequencies <br />and parameters analyzed are given on page 24. <br />SCC also requests the discontinuation from all monitoring for Well YSAL13. This well's casing <br />has been damaged by farming (it exists in a hay field). Well YSAL12, which also is completed in <br />the Sage Creek alluvium, exists 100 feet away from YSAL13. Well YSAL12 will continue to be <br />monitored for water levels and quality. In Tab 15; pages 8 and 22 have been revised for this <br />request. <br />Table 15-3, page 7, has been corrected (re: Wells YSAL7 and YSAL9) to be consistent with <br />Table 15-8, Ground Water Monitoring Frequencies. Page 23 of Table 15-8 has been revised by <br />removing references to Wells YW24 and YOV25. No monitoring was proposed for these two <br />wells, due to completion problems. None of the corrections addressed in this paragraph will <br />change the monitoring program. <br />Finally, Table 15-9, page 24, has been revised to reflect a request for a change in water quality <br />sampling. Full suite lab samples will be collected for streams and springs only if flows exceed <br />five gallons per minute. This limitation is consistent with the approved monitoring program for <br />SCC's Seneca II-W Mine. <br />Enclosed are the required application form, proposed public notice, insertion instructions into the <br />PAP, and the revised text. Should you or any other members of the Division have any questions <br />regarding this information, please do not hesitate to contact me. <br />Enclosure(s) <br />c: Thomas Ehmett (OSMRE) <br />Rick Holbrook (OSMRE) <br />John Husband (BLM) <br />,/ Gary Wendt (PWCC) <br />Sincerely, <br />~(,~ LA~ <br />Michael G. Altavilla, P.E. <br />Engineering Manager <br />Seneca Coal Company • P.O. Drawer D • Hayden, Colorado 81639 <br />Telephone (303) 276-3707 • FAX (303) 276-3014 <br />