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Memorandum to Christine Johnston <br />October 7, 1999 <br />Page 10 <br />t September 17-Reexamination of Most CDMG Locations on Jumbo Mountain: <br />' Location CDMG-2. Located above the northwest corner of longwall Panel 8. <br />• Traversed the lower Jumbo Mountain road for about 2 miles to point past Locations 2A <br />and 2B (September 98). No cracks were observed to location. Previous cracks aze <br />completely obliterated. <br />Location CDMG-4A. Located 400 to 500 ft southwazd from CDMG-4 in landslide terrain. <br />' • This crack-which trends N-S, is about 50 ft long, and 2 to 5 ft wide and deep-has <br />sloughed, rounded off, and filled in. It looks much older than last September, when it was <br />very fresh. <br />Location CDMG-4. Located in landslide terrain above the gate roads between longwall Panels 8 <br />and 9. <br />' • Cracks are much more rounded, healed and vegetated compared to last September's visit. <br />• No new cracks were observed in this area. <br />Location CDMG-5. Located in landslide terrain (bulges, depression, and leaning trees) above <br />' longwall Pane19. <br />• The lazgest and most extensive cracks on north Jumbo Mountain occur at this location. <br />' • Cracks aze still pronounced, but are sloughed in, rounded, and more vegetated than last <br />September. No new cracks were observed. <br />' Location CDMG-l. Located above the northern gate road entries of longwall Pane18. <br />' • Cracks aze more rounded, filled and vegetated than last September. <br />• These cracks and offset surface caused closure of the road to all forms of vehicles. Now <br />' the road is accessible to ATVs (going downhill at least). <br />A site located 500 to 600 ft S40°E of CDMG-1 in landslide terrain. <br />' • Cracks are more rounded, filled in, and vegetated than last September when they were <br />very fresh. <br />CDMG-8. Located in landslide terrain above longwall Pane18. <br />Wright Water Engineers, Inc., 2490 W. 26'" Aeenue, Ste. 100A, Denier, CO 80211 <br />' Tel. 303/480.1700; Fax 303/480.1020, e-mail krvrtight@wrightwater com <br />