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-47- <br /> All mine openings and drill holes will be sealed according to the requirements <br /> of Rule 4.07.3(l ) ,(2) of the Colorado Permanent Regulatory Program. The <br /> permittee is proposing the transfer of drill holes or wells following the <br /> completion of the mining operation to the BLM for use as water wells. This <br /> will require the prior approval of the regulatory agency and the Colorado <br /> State Engineers Office. Drill holes or wells which have been placed in an <br /> aquifer and which will not be transferred to the BLM for postmining use will <br /> be sealed according to 4.07.3(2) of the Colorado Regulations. <br /> The operation is in compliance with the requirements of this section. <br /> XXIII. Subsidence - Rules 2.05.6(6), 42.0 <br /> Information pertaining to subsidence predictions, control , and monitoring is <br /> presented in Section III.A.5, Pages III-13 to III-15e of Volume 4 of the <br /> permit application. Map 131 of Volume 11 shows the location and configuration <br /> of the proposed subsidence monitoring network. Illustration 23 contained in <br /> Volume 12 of the application provides sample subsidence and strain <br /> calculations for the first room and pillar extraction panel . <br /> The permittee proposes to mine, during the extended life of the Deserado Mine, <br /> by underground methods of room and pillar and longwall extraction, two seams <br /> of coal throughout much of the 9,152 acre permit area (Volume 2, Fig. III-3 <br /> and III-4). During the first permit period (1981 -1989) extraction will be <br /> limited to the uppermost D-Portal seam, which averaged approximately 8. 5 feet <br /> which. Depth to mining with in the D-Portal ranges from 200 to 1200 feet. <br /> Subsidence is predicted to range 2 feet to 6.2 feet. Overall lowering of the <br /> ground surface, as opposed to local differential collapse, is predicted by the <br /> permittee. The permittee proposes to mitigate any damages which may occur by <br /> appropriate repair. The permittee also proposes to compensate in full for any <br /> loss of livestock which might occur. <br /> If subsidence does material damage to stock watering ponds, the permittee <br /> proposes to repair or relocate any affected ponds. <br /> If subsidenee-damage occurs to Rio Blanco County Road No. 65, which crosses <br /> diagonally over an area above the mine where subsidence is predicted to occur, <br /> the permittee proposes to repair that road. If subsidence is found to <br /> extensively disturb the county road, the permittee proposes to relocate County <br /> Route No. 65 to a protective corridor of- non-subsidence. A maintenance team <br /> will be in constant attendance to repair any cracks that might create a safety <br /> hazard or delay traffic on County Route No. 65. The 13.8kv powerline which <br /> traverses a large portion of the mine plan area will be guyed, monitored on a <br /> regular basis and repaired as necessary. <br /> Mining is proposed to occur beneath portions of both Scullion Gulch and Red <br /> Wash, ephemeral streams within the permit area. Mining beneath Red Wash will <br /> -� commence in T986 with the development of mains and sub-mains. Production <br /> mining beneath Red Wash will be limited to the eastern terminus of longwall <br /> ppanels LW-1 , LW-2, LW-3, and LW-4 which are proposed to be extracted during <br /> 1987-1990. Production mining will also occur beneath Red Wash within room and <br /> pillar .panel RP-1 during the year 1991 . Mining beneath Scullion Gulch will <br /> commence in 1990 <br />