2012-03-07_REPORT - M1977342 - Laserfiche WebLink

Home Browse Search

Drill Hole ID Longitude Latitude Elevation Location HENX1101 105 49.758 39 45.518 10952 Red Mtn HENX1102 105 50.668 39 45.297 11324 Harrison Mtn HENX1103 105 49.681 39 45.744 11084 Red Mtn HENX1103B 105 49.681 39 45.744 11084 Red Mtn 1.4 Other Activities 1.4.1— Weed Control Weed control was not deemed necessary in 2011 since the 2010 effort was so effective. A comprehensive facility -wide weed spray effort will be undertaken in 2012. Annual Report — 2011 Henderson Mine and Mill Reclamation Activities Permit No. M- 1977 -342 1.4.2 — Groundwater Data Groundwater data for well MNGW -1 for Henderson Mine is contained in Attachment B. 2.0 Henderson Mill 2.1 Disturbance Approximately 14 acres were disturbed in 2011. A total of 6 acres were disturbed from incremental tailings impoundment filling, and 8 acres were disturbed as a result of topsoil salvage and piling activates. A site map of the Henderson Mine indicating affected land boundary and disturbance areas is included in Appendix A. 2.2 Interim Reclamation Interim stabilization efforts included the salvage of 271,000 cubic yards of topsoil/growth media from inundation areas along the upstream side of the tailing impoundment. The material was placed in the north stockpile, which is situated on the northern end of the impoundment. Routine maintenance of erosion and sediment control structures was carried out in 2011. 2.3 Other Activities 2.3.1— Weed Control EcoRx, Henderson Mill's contractor for weed management, treated 263 acres at the Henderson Mill site. The primary focus of EcoRx's efforts consistently relate to areas of disturbance (typically surrounding the topsoil stockpiling efforts), thus ensuring that fledgling growth is mitigated and made increasingly more manageable. Areas which were previously logged in the non - industrial sections of the Henderson property were also a center of focus primarily for various species of thistle. Page 2