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STATE OFCOLOFADO niP ~n nuU I?rr~.r ~~•~~^• III IIIIII 111IIII III DEPARTMENT OF NATURAL RESOURCES D. Monte Pascoe, E><ecut~lve Director MINED LAND RECLAMATION 423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 7e1. (303) 866-3567 David C. Shelton Director Novemberl3, 1981 Mr. A.C. Bishard Regulatory Affairs Exxon Company, U.S.A. P.O. Box 440342 Aurora, Colorado 80094 Dear Pfr. Bishard: The following items concerniny the recently submitted ammendment application for the Colony Shale Oil Project, file number 80-47, need to be addressed before the application can be deemed adequate. 1. Soils data for the new parcels of land to be disturbed near Parachute must be submitted. 2. A drainage and sediment control plan for the proposed laydown facility near Parachute should be provided. The amendment application and the annual report provide only sketchy information. 3. Is gravel to be applied to the equipment storage and Zaydown yards? If so, how will the gravel be handled during final reclamation? 4. How large will the oil mist yard be and how will the oil-contaminated "soil" be handled during final reclamation? 5. What steps will be taken to minimize damage to adjacent veyetation and soils From rolling rock during construction of the new Davis Gulch to Middle Fork dam road, particularly in the steeper areas near hlirldle fork? 6. How will the old Davis Gulch to Middle Fork road be reclaimed? Z believe the old road should be backfillcd wherever possible with a bockhoc in all areas that were disturbed since the permit was granted. 7. Zn most cases unreveyctated artificial talus slopes will not be acceptable for final reclamation of lands disturbed under this amenrhncnt where barren talus slopes did not exist prior to disturbance. 8. How steep will the final reclaimed slopes be in the areas added to the plant site? Generally, final reclaimed slopes should be no steeper than the predisturbance slopes.