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<br />• <br />May 8, 1989 ~~~~~ ~~~ <br />CERTIFIED #P843932070 <br />• 1111111111111111111 <br />TR9PPER MINING INC. 999 <br />Mr. Tony Waldron <br />Colorado Mined Land Reclamation Division <br />215 Centennial Building <br />1313 Sherman St. <br />Uenver, CO 80203 <br />Dear Tony: <br />r,fAy 10189 <br />RECLgMgT~ON ~D <br />J11/15lO~ <br />Subject: Minor Revision MR-B5. Change in haul road construction <br />to include utility waste as suitable road base fill. <br />As was discussed with Gregg Squire and William Crick on 4/19/89, Trapper Mine <br />proposes to use utility waste as road base material on a haul road located in <br />our permitted ash disposal area. Two test plots will be established, each <br />approximatel}~ 500 feet in length by 50 feet in wid[h. Test plots will consist <br />of 1) any combination of utility waste products (fly ash, bottom ash, and <br />scrubber sludge; and 2) fly ash only from Craig Station Unit 3. <br />The ash will be placed on the road to a depth of 2' (Figure 1) and will be <br />surfaced with a 6" layer of pit run gravel. The road will be graded in such a <br />manner as to surround the ash with gravel. <br />In accordance with applicable reclamation standards, road water runoff that <br />mingles with runoff from other mining or reclamation disturbances is con- <br />trolled by sedimentation ponds to minimize its effects on water quality, fish <br />and wildlife. Additionally, road runoff will be controlled by a series of <br />dozer basins constructed immediatel}' downstream of the test plot area. <br />The primary purpose for establishing this test plot is to evaluate the per- <br />formance of utility waste as stable road base material for future haul road <br />construction considerations. The test plot is proposed for construction in <br />late spring-summer 1989, and will be evaluated through a spring 1990 runoff <br />period before a determination of suitability is made. <br />Tony, if you have any questions, please contact me. I look forward co working <br />with you in the future. <br />Sincerely, <br />ffjj~~ ~/c~~ / '^ <br />/~f~~"z'71r ~/~ <br />William Agnew <br />Sr. Environmental Engineer <br />WA/jb <br />[CMLRD\MAY08J <br />Enclosure <br />c: E.C. Johnson S.G. Lucien <br />J.Af. Mattern R.L. Fanyo <br />W.S. Harding file <br /> <br />P.O. Box 187 Craig, Colorado 81626 (303) 824-4401 <br />