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• Station 81 Grosse-Rhode Ranch Site. This station was created in 1996 by UTE Engineering and Surveying Company to replace previous Station 94. Discrepancies conceming stations 94, 96, 97 and 98 required new stations to be established. The August 2004 survey data indicates an elevation gain of 0.02 feet when compared to the November 2001 elevation. r ~ L_J Station 82 Grosse-Rhode Ranch Site. This station was created in 1996 by UTE Engineering and Surveying Company to replace previous Station 96. Discrepancies concerning stations 94, 96, 97 and 98 required new stations to be established. The August 2004 survey data indicates an elevation gain of 0.01 feet when compaeed to the November 2001 elevation. Station 83 Grosse-Rhode Ranch Site. This station was created in 1996 by UTE Engineering and Surveying Company to replace previous Station 97. Discrepancies concerning stations 94, 96, 97 and 98 required new stations to be established. No survey data was reported for this site during 1998. The August 2004 survey data indicates an elevation loss of 0.02 feet when compared to the November 2001 survey. Pitkin Mesa Pipeline Seven subsidence monitoring stations were established at locations along the Pitkin Mesa Pipeline which overlies Panel C. Panel C development commenced in October with twenty-four crosscuts completed by January 1, 1993. Panel C was mined utilizing a partial extraction design intended to preclude the development of subsidence in order to protect the pipeline. The subsidence monitoring stations along the pipeline are depicted on Map No. 2-SA. The stations were surveyed twice in 2004; August 10 and December 24. The results of this survey aze appended to this report. The 2004 survey was conducted by Cragg Surveying. The Cragg survey will provide consistent survey values in the future which will show that this area is stable. Surveys will continue approximately semi-annually until stability is documented. Visual Monitoring 2004 Visual subsidence monitoring is accomplished by periodic "walkovers" of recently mined areas within the present permit azea. Walkovers are generally done in conjunction with survey monitoring due to the seasonal accessibility of the area. During the 2004 monitoring season, visual monitoring consisted of visual inspections done while performing survey monitoring and water monitoring. Visual monitoring is concentrated over areas of retreat mining with particular emphasis on azeas mined under low overburden. Since the mine has now been idled in excess of 5 yeazs, there are no areas of particular emphasis on which to concentrate visual inspections. I •