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frequency for the next six months. After this period expires and two quarterly visual inspections and instrument <br />surveys showed no further subsidence, the monitoring program for that panel ended. <br />Western Area Power Administration Line <br />The line, which is of single wooden -pole construction and parallels RCR 33, was visually inspected to determine <br />impacts to the line. The visual monitoring program was conducted on a daily basis when the active longwall face <br />was within 500 feet of the structure. The monitoring ended when the face was 1,500 feet past the structure. <br />Yampa Valley Electric Association Line <br />The line is located in Section 23, T5N, R86W, which parallels County Road 33, was visually inspected on a daily <br />basis. The inspection commenced when longwall mining began under the structures and terminated when the <br />longwall face was 1,500 feet past the structures. <br />Union Pacific Railroad (Formerly Southern Pacific) <br />Twentymile and/or representatives of the railroad inspected the track on a daily basis during the subsidence period. <br />The monitoring commenced when the active longwall face was within 500 feet of the track and continued until the <br />face was 1,500 feet past the tracks. In the event there are grade changes, which could disrupt traffic, the railroad <br />tracks were repaired accordingly. The anticipated repair focused on re- leveling the track and/or having a slow <br />speed restriction on during that time period. The monitoring and repair of the track will occur until mining of <br />panels 7 through 9 of the Eastern Mining District were completed. The monitoring and repair occurred periodically <br />throughout the time the track was undermined along the track - traversed portions of the panels. Therefore, daily <br />monitoring was not required while all of the first three panels were being mined. During the repair of the track <br />additional ballast was required to re -level the track. This was replaced on an as needed basis. Twentymile <br />stockpiled additional ballast for the repair work. <br />Foidel and Middle Creeks <br />Foidel Creek and Middle Creeks were monitored as per the requirements presented in the hydrologic monitoring <br />plan. Additionally, the creeks were surveyed before and after longwall mining to prepare a channel profile. The <br />profiles were compared to determine if there were any unanticipated changes resulting from the undermining of the <br />creeks. The survey was completed during favorable (i.e. not ice - covered) low flow periods before and after the <br />mining episode. <br />The results of the above work are presented in the semi -annual subsidence report submitted to the Division. <br />EMD (Panels 2 Right through 6 Right) (PR 97 -04) <br />As was presented in the Eastern Mining District (Panels 9 Right through 7 Right) application (PR 93 -03), TCC did <br />not planning on establishing further subsidence monuments except as described below. The ongoing subsidence <br />monitoring work has demonstrated that TCC's subsidence predictions were conservative and provided acceptable <br />descriptions of expected subsidence. Any further subsidence monitoring work would just be further verification of <br />these predictions and is not warranted. <br />Permit Renewal No. 3 2.05 -191 1115100 <br />