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Foidel Creek <br />• A longitudinal profile was taken prior to the commencement of longwall mining. Another profile was obtained in late <br />summer, and then annually thereafter until it is demonstrated that the stream channel has stopped subsiding. <br />The Foidel Creek monitoring results were forwarded to the Division in the semi-annual subsidence report. A <br />summary of the visual inspections of the powerline and County Road 33 were forwarded to the Division in the semi- <br />annual report. <br />EASTERN MINING DISTRICT (Panels 9 Right Through 7 Right) <br />Subsideuce Monitorine Plau <br />As in the Southwest Mining District application, TCC did not plan on establishing further subsidence monuments, <br />except as described below. The ongoing subsidence monitoring work has demonstrated that TCC's subsidence <br />predictions were conservative and provided an acceptable description of expected subsidence. Any further <br />subsidence monitoring work would just be further verification of these predictions and is not wartanted. <br />County Road # 33 <br />In reference to Routt County Road 33, TCC installed subsidence monuments along the road at the gateroads and <br />center of the panels. These monuments are TCC's typical subsidence monument. The monuments were monitored <br />on a quarterly frequency while active mining occurs. Once the panel was mined and two monitoring sessions show <br />no further movement, monitoring was discontinued and the monuments will be removed. <br />• While the road was undermined, signs were placed 1,500 feet before entry into the section of road that was <br />subsided. The signs were large billboard-type signs, approximately 4' x 8', and lettered with "Begin Subsidence <br />Zone" and "Leaving Subsidence Zone." These signs were placed so they were visible for each travel direction. In <br />addition to the entrance signs, warning signs were placed throughout the subsidence area and read, "Rough Road, <br />Drive With Caze." After subsidence has ended and/or fmal repair completed, the signs will <br />be removed from the site. <br />Additionally, during active mining the road was inspected daily for evidence of surface cracking. The drainage <br />ditches along the side of the road were checked and repaired as necessary to maintain road drainage. <br />Also, the railroad overpass located in section 28, TSN, R86W, will be monitored by establishing a monument in the <br />overpass. Likewise a monument will be placed in RCR 27 approximately 2,000 feet west of its intersection with <br />RCR 33. Both of these monuments will be monitored quarterly and the results submitted in the semi-annual <br />subsidence report. <br />Powerlimes <br />Twentymile Coal did not see any material damage resulting from the undermining and subsiding of the powerlines <br />traversing the Eastern Mining District. The data demonstrated the wood structure, both sign poles and H-structures, <br />were subsided and no loss of service occured. Public Service requested that their wooden structure transmission <br />line be monitored. The specifics of the plan are presented later. <br />• <br />gpPi3®i/~~f AFR 2 4 2000 <br />Permit Renewal No. 3 2.05-189 12/10/98 <br />