REV93946 - Laserfiche WebLink

Home Browse Search

8-2. Reduction in monitoring. Kerr is proposing to eliminate ground water monitoring wells: 79-1, 79-2, 79-3 and 79-61 at the mine. The DMG concurs with eliminating the water quality sampling for these wells, but not the water levels. Water levels should be monitored semi-annually. This information will be informative, especially coupled with spoils aquifer measurements in the newly installed wells. Water quality monitoring may be necessary at bond release to confirm the anticipated impacts of mining. Groundwater sites AP-3 and AP-4 at the loadout can be dropped. The results have been consistent over the years. Kerr has also requested to changes to surface water monitoring. The DMG concurs with the proposal to eliminate Sites 300, 306, 322 and 327. Sites 314, 316, 317 and 3l8 should be retained to provide valuable data when flowing and to collect information at the time of bond release. 8-3. Elimination of water quality parameters. The proposed list of pazameters for groundwater (p. 108c) and surface water (p. 109b) aze acceptable. 8-4. Table 61 needs to be revised to include the designated monitoring locations and to reflect the approved revisions. 9. Kerr submitted TR-18 to address the reclamation of the loadout. Reclamation is scheduled to occur during the 1999 field season as stated in your December 15, 1998 letter. Please revise page 780-63a to reflect this commitment. 10. Kerr has submitted a revised rill and gully stabilization plan. One additional component should be added to the plan. For excessive gully formation on reclaimed areas Kerr needs to identify and correct the causal agent(s), and then proceed with the necessary repairs as described on revised page 816-142. 11. A revised weed control plan has been presented starting on page 780-83. The primazy weeds to control are Canada and Scotch Thistle. Kerr is proposing to use 2,4-D and picloram. The timing of application has not been addressed. For best results 2,4-D is applied postemergence in spring or early summer when young vegetation is actively growing. Picloram is applied any time after growth begins in the spring before full bloom, and late in summer or fall up to 3 weeks before frost. The timing needs to be addressed in the application. 12. Kerr submitted a vegetation monitoring report that was completed in 1996. This report addresses reclaimed mine azeas that were seeded prior to 1981, in 1981, 1984, and 1986. The data is helpful to evaluate vegetation establishment in those azeas. To date no monitoring has been conducted in the Pit 1 Area (seeded in 1996) or the 720 Pit (seeded in 1995).