2012-10-05_REVISION - M1977342 (13)

Home Browse Search

Appendix E List of DRMS Technical Revisions Henderson Mine and Mill, Permit M- 1977 -324 October, 2012 TR- Historic aka HR -01 TR- Historic aka HR -02 TR- Historic aka HR -03 TR- Historic aka HR -04 TR -01 TR -02 TR -03 TR -04 TR -05 TR -06 TR -07 TR -08 TR -09 TR -10 TR -11 TR -12 4/13/1979 7/9/1980 3/29/1983 10/26/1983 4/8/1988 3/11/1991 6/28/1991 8/10/1995 10/2/1995 8/29/1996 3/31/1999 6/30/1999 4/11/2000 5/18/2001 9/4/2001 9/6/2002 • Change the timetable for reclamation of Area 10 of Henderson Mine from 1979 to 1983 for 5 acres and 2006 for remaining 6 acres. • Exchange 50 acres of disturbed area from Area 21 for 50 acres northwest of the tailing dam outside of the present affected land boundary. • Exchange 13 acres of disturbed area from the southwest end of Area 23 for 13 acres adjacent to Area 9 outside present affected land boundary. • Clarify statements in permit application that will be considered as commitments. • Institute an alternate form of bonding and establish a reclamation trust fund. • Revised requirement for soil cover on tailing. • Revise the soil stockpile plan. • Proposed soil stockpile plan meeting requirement to cover tailing deposition area with an average 12 inch soil depth. • Affected area boundary markers in response to 1990 MLRD regulations ammendment. • Environmental Protection Plan. • Groundwater Monitoring Plan. • Establish Points of Compliance. • Establish Numerical Water Quality Limits. • Add possible Henderson water treatment facility for DRMS bonding purposes. • Affected land exchange. • Use of Pond 1.2 for water treatment sludge disposal from (offsite) Urad wastewater treatment plant. • Tailing Pond decant pipe and emergency spillway pipe plugging. • Seepwater collection and pumpback. • 1 -Dam GW Interception Well Field. • Topsoil salvage methods. • Permit revision in response to financial warranty increase. Climax Molybdenum Company Henderson Operations