Laserfiche WebLink
<br />-2- <br />Surface water monitoring requires monthly flow measurement at three sites and <br />quarterly analysis at those sites. NPDES reporting is also required and <br />sampling is required when discharge occurs. <br />Ground water monitoring requires depth to water measurements at seven wells <br />and quarterly analysis of each well. <br />Subsidence monitoring adjacent to the highway has been suspended. <br />Revegetation success has been questioned by staff on reclaimed areas of the <br />former East Pit. Lack of effective cover has resulted in rilling and gullying <br />as previously mentioned. <br />Other Concerns <br />The major concern at the Chimney Rock site transcends both permitting and <br />on-the-ground designations. Preliminary evaluations of existing topography <br />and approved post-mining configurations have identified areas of potential <br />overfill in the former East Pit. A potential problem with the mass balance <br />was first brought to our attention in the autumn of 1986. With the submittal <br />of actual existing topography maps in December 1986, it is apparent that in <br />order to achieve the approved post-mining topography in the Revision No. 1 <br />area, material overfilled in the south portion of the former East Pit area may <br />need to be removed. This determination would significantly affect the <br />magnitude of the reclamation bond. <br />srs <br />8180E <br />