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• energy fuels coal, inc. i <br />soufhlield mine • post ollice box a49 • Oorence, coiorado Bt226 • (303) 76a-6395 <br />Letter to Mr. Gregg Squire <br />April 16, 1986 <br />Page two <br />The proposed permit area addition shown on Map 1, Florence Lease <br />Mine Plan is a projection to the surface of the maximum area which <br />may be affected by mine subsidence. A 25 degree angle of draw was <br />used for the projection. Average coal thickness in the area is approx- <br />imately seven feet at an average mining depth of 1,080 feet. The <br />effects of subsidence and mitigation measures are the same as those <br />addressed in Section 2.05.6(6) of the approved permit application. <br />All surface features which are subject to subsidence affects are shown <br />on Map 1, Florence Lease Mine Plan. They include Newlin Creek, the <br />Florence City water line, power line and County Road 15. Each of the <br />above mentioned surface features are specifically addressed with re- <br />spect to subsidence in Section 2.0. Section 2.05.6(6) of the approved <br />permit application is incorporated herein by this reference. <br />• The geology and hydrology of the area subject to this request is iden- <br />tical to that in the adjacent permitted area. Additionally, the mine <br />plan is also identical to that in adjacent areas. Detailed descrip- <br />tions of the hydrology, geology and affects of mining are discussed <br />fully in Sections 2.04.6, 2.04.7 and 2.05.6(3) permit application. <br />Sections 2.04.6, 2.04.7 and 2.05.6(3) of the approved permit appli- <br />cation are incorporated herein by this reference. <br />Since this technical revision request does not contemplate additional <br />surface disturbance associated with the mining activities at the South- <br />field Mine, no additional reclamation bond is necessary. <br />The area proposed for inclusion in state Permit C-014-81 as described <br />herein is not located on any lands subject to prohibitions or lim- <br />itations described in Section 2.OZ.6(2) (d) of the MLRD Regulations. <br />If you need further information or clarification of any matter sub- <br />ject to this request, please don't hesitate to contact either David <br />Gossett or myself. Thank you in advance for your prompt attention <br />to this request. <br />Sincerely, <br />rte: ~r .C°: - ~~`~\~i~ <br />:.~ ie:l S. Weaver <br />t•;ine Engineer <br />• Attachments <br />cc: David R. Gossett <br />Art Garcia <br />DG/pg <br />