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• <br />• <br />• <br />2.05.6(6) <br />Subsidence Monitoring <br />To measure subsidence if any along <br />Monument <br />Aqueduct & <br />Frequency <br />the Pitkin Mesa Pipe Line & Stevens <br />PL -08 to PL -17 <br />Stevens Gulch <br />Quarterly <br />Gulch Road <br />photographs <br />Road <br />beginning in 2001 <br />Monitoring to Begin One Year Before <br />until two years <br />Mining in the Area <br />Subsidence Monitoring <br />Monument <br />Location <br />Frequency <br />Purpose <br />Color aerial <br />USDA -FS <br />5 Year intervals <br />To monitor the topographic surface, <br />photographs <br />Managed Surface <br />beginning in 2001 <br />soil and vegetation through <br />until two years <br />interpretation of color aerial <br />after mining. <br />photographs <br />Visual <br />Known historic <br />Twice per year, <br />Determine if mining has rejuvenated <br />and modern <br />typically June <br />or created new landslides. <br />landslides within <br />and November. <br />the permit and <br />adjacent area. <br />Visual <br />Sheep Corral <br />Within 3 months <br />Monitor for surface fractures that may <br />Drainage <br />after the B -8 <br />cause interruption of surface flows, <br />bleeder entries <br />damage stock ponds or create large <br />are developed, <br />fractures that will need to be mitigated. <br />and on a <br />quarterly basis <br />thereafter during <br />mining of panels <br />B -8 and B -9, and <br />for six months <br />post mining. <br />All other <br />Over mining area <br />At the discretion <br />To develop subsidence data to <br />monuments <br />of the Operator <br />support future mine plan expansions. <br />PR -12 <br />A PP2ovEI> <br />0 <br />2.05-164- <br />11/10 <br />