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42.05 APPLICATION FOR PERMIT FOR SURFACE OR UNDERGROUND MINING ACTIVITIES -- <br />MINIMUM REQUIREMENTS FOR OPERATION AND RECLAMATION PLANS. <br />2.05.6 Mitigation of Surface Coal Mining Operation Impacts. (Cont'd.) <br />(6) (a) (ii) (A) (Cont'd,) <br />pumphouse. Log and wood frame con- <br />struction, which is not particularly <br />sensitive to the effects of subsidence, <br />predominates. A list of the structures <br />and their specific construction types <br />(Table 11) is given in the Structures <br />Appendix in Volume 3. <br />Two electrical power lines are located <br />in the area, The 230 KV Curecanti-Hay- <br />den powerline parallels Terror Creek, <br />outside the eastern portion of the per- <br />mit area. Typical high voltage power <br />poles support this structure. A 7200 <br />volt buried powerline connects the mine <br />site and Steven's Gulch wellfield. The <br />powerline is buried approximately 6 ft. <br />deep. <br />• The CWI water supply pipeline follows <br />the same alignment from the wellfield <br />to the mine site. Construction con- <br />sists of 4-inch diameter ductile steel <br />pipe with belled connections buried ap- <br />proximately 6 ft. deep. <br /> The Pitkin Mesa Pipeline or Aqueduct <br /> traverses the permit area from north to <br /> south (see Map 9-7), parallel to Ste- <br />//~~, S <br />~ ven's Gulch. The original pipeline, <br />V,~ built in 1937, collects water from a <br />I <br />I~ series of springs approximately 4 1/2 <br />/ ~ L <br />' <br />y i~U.,v.~'!_/•~_ miles north of the Orchard Valley Mine <br />~~q~~ , <br />!~"' area. During various times, the origi- <br /> nal pipe line (4-inch diameter steel) <br /> was replaced with 6-i.nch diameter <br /> P.V.C. pipe (see Map 9-7). <br /> Numerous roads traverse the permit <br /> area, most of which are unimproved dirt <br /> trails. The Steven's Gulch road bi- <br /> sects the permit area and consists of <br />Added 12/26/84 <br />Revised 12/26/84 <br />Revised 10/01/87 <br />139 <br />