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~. f. {~~j{~1,y-~ T.a~j'VC w~: _ <br />{ ~~/ ~<K ~ ~~~'~~k!'~: ice.' Y > ~_ _ _ .. <br />1313 Sherman Sl., Room 215 <br />Denver, Colorado 80203 <br />Phone: 1303)866-3567 <br />FA%: (303) 832-8106 <br />Mr. Larry Reschke KESOUR <br />Powderhorn Coal Company R rtomkr <br />P.O. Box 1430 Gaart~mor- <br />Palisade, Colorado 81526 larrss.C«hhe,d <br />FzeCUlive D~rMOr <br />Michael B. long <br />RE: NOV C-97-016 Modification, Roadside Portals Mine Dirlsian Director <br />- Permit No. C-81-041 <br />Certified Mai1.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__diteh_ segments . <br />which did not comply with approved designs, but which SEDCAiS <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~ <br />Dan Mate <br />Environmental Protection Specialist <br />cc: Larry Routten, DMG Denver <br />/~,i/ao/ /U/u~y7 <br />DTwI <br />