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~~, <br />~~ <br />1 Hi~vember 1999 <br />Suresu of Land ManaB <br />Attention: Mr. Berry <br />246!i So. Townsend Av <br />Moa!:rose, CO 81401 <br />Geaia emen, <br />Ia reference to yo <br />Bnv:.ronmental Impact <br />Col;~rado, we could 1 <br />the following items: <br />Appi~ndia R, Pages E-2 <br />Cre~:k Reservoir" <br />Due to the kaoMn <br />Guaaiison River, your <br />res~~zvoir structure <br />aorr-allp do not oonsi <br />aag;s of draw, we h <br />have been observed at <br />nea!• Craig in northw <br />has been applied o <br />preriouely stated, w <br />usa~:l due the catastro <br />the dam. If Iron P <br />Alt•~rrnatives 8, C wad <br />Aita~rnatives A. I <br />sho~~m on previous =A, <br />ao r..b jectiona to the <br />Raft EIB-Iron Point and Elk Creek Coal <br />Lease Tracts <br />September, 1969 Draft "North ffork Coal <br />Statement, Delta and Gunnison Counties, <br />e to express concefA and questions about <br />to R-24, "Longwell Mining Beneath Terror <br />.stability of the North Fork valley of the <br />alyais of the subsidence hazards to the <br />re too optimistic. Insurance companies <br />r'subaidence insurable.. in regard to the <br />e.heard that eagles as high as 25 degrees <br />he Neat Elk Mine and as high as 63 degrees <br />t Colorado. In additiion, no safety factor <br />indication of any (modeling done. As <br />believe a safety factior of 5008 should be <br />io danger.involved wbth habitations below <br />nt Coal Lease is permitted as described in <br />then ws would bel forced to support <br />boundaries were redrawn similar to those <br />e could be much more supportive. We have <br />k Creek Cpal Lease. i <br />Appa~ndia R, Page R-22, 8.4.1 <br />Nhile "Terror Creek R aervoir is outside anp proposed lease tract <br />bout::dar7j", with a rea onable safety factor applied to the angle <br />of elraw, it would be ffected. <br />Pag~!~•'9-53, Appends: R <br />We •I.ake exception to <br />of longwall mining ao <br />rair.:fall, even small <br />to •Lhe instability mu <br />minting would be do <br />additional stronger a <br />Sei:!.mic energy waves <br />effr,~ct Pram a small e <br />Page 3-51, 3.3.3.1 <br />Wha•: is the meaning <br />Page R-24 <br />°Mining induced sefamic events as a result <br />d be minimal". During periods of heavy <br />eismic events could trigger landslides due <br />of the area. Also, some room and pillar <br />is driving aceessways which could create <br />smio effects inareaaing subsidence danger. <br />an reinforce which can cause an applified <br />"leaks would not be offered" <br />