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Post-Damage Monitoring <br />• The water levels in the 500,000 gallon and 100,000 gallon tanks will be morn <br />itored twice daily after leakage repair until determined by CWI management <br />that the fix to the pipeline is adequate, Then the monitoring will be as <br />de~cribed in the pre- monitoring section, <br />Mining Technique <br />The Pitkin Mesa Pipeline crosses BLM designated buffer zones. Limited min- <br />ing will be conducted in these buffer areas as designated by BIM in Lease <br />#C-37210. Only development entries will be mined in this area. See Map <br />2-5, In areas between 600 and 800 ft. of overburden, the pipeline will be <br />undermined using development only and ro pillar recovery. Calculations show <br />that this limited extraction will maintain the surface areas with ro subsi- <br />dence. See Pillar Stability l~port, Volinne 2, In areas of greater than 800 <br />ft, of overburden, conventional room-and-pillar technique with pillar <br />extraction will be conducted. CWI does rot propose mining under the Pitkin <br />Mesa Pipeline in the initial permit term, q~rrent calculations show that <br />• the subsidence-induced strains will be above allowable pipeline strengths. <br />The calculations on these strains will be altered once additional site- <br />specific subsidence data is evaluated. At this time, CWI does propose con- <br />ventional roan-and- pillar technique in areas above 800 ft, of overburden. <br />Repair Procedure <br />1. Within 48 hours, locate pipeline leak by visual inspection or <br />underground detectors. <br />2, Excavate pipeline and evaluate cause for leakage. <br />3. Shut off pipeline flow, <br />4. Repair pipeline using appropriate couplings and pipe per manufar <br />turer's recanmendations. <br />5. Backfill repair area, <br />6, Revegetate disturbed area utilizing CMLRD approved permanent seed <br />mix tore . <br /> <br />