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<br />• <br />• <br />E <br />S Cosl Comps <br />Seneca Coal Com <br />June 8, 2005 <br />Mr. Mike Boulav <br />Division of Minerals and Geolog5• <br />1373 Sherman Stteet, Room 215 <br />Denver, CO 80203-2273 <br />REGE~VE.p <br />RE: Seneca II Mine Permit 680-005 <br />Technical Revision No. 39 (TR-39) <br />Dear Mr. Boulay, <br />~uw o ~ zoo5 <br />pwyion d Minerals en0 Gerrlo9Y <br />Enclosed please find three (3) copies of an application for TR-39 to the Seneca II Permit C-80-005. This <br />application addresses changes to the principal spillway locations and configurations at Ponds 004 and 008 and <br />abandonment plans for the existing spillways. This package contains the required application form, proposed <br />public notice, the revised or new information, and the insertion instructions for updating the PAP. <br />Duting an inspection in April 2005 {following snow and ice melt) it was observed that Pond 008 principal <br />spillway was no longer functioning as designed and constmcted. The principal spillway riser had deteriorated <br />below the orifice and was not retaining the design volume of water. SCC alerted the Division of the situation <br />and that interim remedial steps had been taken to provide as much containment as possible until an approved <br />remediation plan could be implemented. <br />Pond 004 was inspected at the same time and it was determined that there was enough deterioration to the <br />discharge barrel of the principal spillway to warrant replacement of this pipe. This principal spillway consists <br />of a straight pipe through the embankment. <br />SCC has reviewed these ponds and redesigned the princpal spillways to safely handle the current hydrologic <br />conditions. Both spillways will be replaced by straight pipes through the embankments at appropriate <br />elevation. As a safety measure to ensure longevity of the spillways, SCC Is proposing to install corrugated <br />"plastic" pipe as replacement for the original corrugated "metal" pipe. <br />]f you or other DMG staff members have further comment or questions, please don't hesitate to contact me <br />at (970) 846-3648. <br />Sin~i,~. - <br />;;~~ccrr~QQ <br />Roy A. Kano <br />Reclamation Manager <br />Seneca Coal Company <br />enclosure(s) <br />cc: John Husband (BLM) <br />CarlJohnston (OSMRE) <br />Seneca Coal Company • P.O. Box 670 • Hayden, Colorado 81639 <br />Telephone (970) 276-3707 • FAX (970) 276-3014 <br />