Laserfiche WebLink
Pi~tsbury and Midway, Fis•reek Mine File -3- • December 9, 1982 <br />Normally, the operators have elected to limit extraction beneath such <br />systems in order to control subsidence and related hydrologic impacts. <br />The Division also indicated that normally underground operations are <br />required to set up a test panels with subsidence and hydrologic monitor- <br />ing in order to verify their predictions prior to the~Division approving <br />mining at full extraction levels, during later permit periods. No operator <br />has received permission to commence full extraction beneath such a surface <br />drainage system. <br />JZ/yt <br />cc: Jim Pendleton <br />Roy Cox <br />Ed Bischoff <br />Bob Liddle <br />