Laserfiche WebLink
Subsidence: During 2007, subsidence survey data was collected periodically from established monuments on <br />the Union Pacific Railroad and the YVEA power line in areas underlain by gate roads or panel centers during <br />periods of mining in the 20 and 21Rt longwall panels. Subsidence survey data was collected periodically from <br />established monuments on the Union Pacific Railroad in areas underlain by gate roads or panel centers during <br />periods of mining. Fish Creek was not undermined/subsided by new mining activities in 2007. <br />No subsidence ponding overlying subsurface mined areas along Foidel Creek or Middle Creek was evident in <br />2007. No significandadverse water quality impacts relating to subsidence were evident in 2007. <br /> <br /> <br />17 <br />