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PQ~4 III IIIIIIIIIIIIIIII <br />PEAHODY COAL COMPANY <br />Western Dlvldon <br />April 11, 1991 <br />1300 South Vele <br />FlagsteH, Arizona 66001 <br />(602) 7745253 <br />1-14.V~~ V C® <br />Mr. Dan Mathews APR 15 1991 <br />Colorado Mined Land Reclamation Division <br />1313 Sherman Street, Room 215 Mined Land <br />Denver, Colorado 80203 Reclamation Division <br />RE: Permit C-82-057, Seneca II-W Mine TR 12 <br />Dear Mr. Mathews: <br />Enclosed please find three copies of an application for a Technical <br />Revision to the Seneca II-W permit. This submittal is prepared in <br />response to the Divisions issuance of NOV C-91-001 and <br />corresponding abatement directives for the tie across haul road. <br />The hydrologic design parameters for the tie-across haul road ditch <br />TAHRD-9 were reevaluated and the revised permit text and tables are <br />enclosed. The following stabilization plan will be implemented for <br />TAHRD-9: <br />a) Straw dikes will be installed in the <br />bottom of TAHRD-9 on the less steep <br />slopes (east end) to reduce the flow <br />velocity of runoff. <br />