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,,~,,,c~J ~~~1 Y~ <br />D~`"~ <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmenl of Natural Resources <br />1313 Sherman SI., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX:13031832-8106 <br />Mr. Larry Reschke <br />Powderhorn Coal Company <br />P.O. Box 1430 <br />Palisade, Colorado 81526 <br />~I~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Roy Romer <br />Governor <br />lames S. Lochhead <br />Enecuiive Director <br />Michael B. Long <br />RE: NOV C-97-016 Modification, Roadside Portals Mine Div is~on Director <br />Permit No. C-81-041 <br />Certified Mail No. P 179 166 285 <br />Dear Mr. Reschke: <br />Enclosed is a modification notice to NOV C-97-016 which is being <br />issued to include additional refuse area ditch locations which we <br />determined did not comply with approved designs, based on <br />measurements taken during the joint OSM/DMG "special focus" <br />inspection in August, and subsequent SEDCAD evaluation. Also <br />enclosed is an addendum to the August 29 special focus inspection <br />report, and supporting documentation. <br />Note that the NOV modification includes certain ditch segments <br />which did not comply with approved designs, but which SEDCAD <br />evaluation indicates would pass the 100-year/24-hour storm event. <br />For such ditch segments which have historically functioned well, <br />with minimal maintenance, modification of permit-designs to more <br />accurately reflect as-built ditches would be an appropriate <br />alternative to field modification of ditches. The December 1 <br />abatement deadline should allow sufficient time for submittal of a <br />technical revision addressing such design changes. <br />Please contact me if you have any questions. <br />Sincer y~~~////////JJ <br />Dan Mat ews~ <br />Environmental Protection Specialist <br />cc: Larry Routten, DMG Denver <br />