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_.. __ <br />(Page 2) <br />MINE ID # OR PROSPfiCTING ID # M-BO-244 <br />INSPECTION DATE July 14, 1994 INSPECTOR'S INITIALS JAP <br />OBSERVATIONS <br />Phase 1 Heap Leach Pad `Impromptu Sump• Removal <br />I inspected the vicinity of the "impromptu sump" adjacent to the upslope toe of the phase <br />1 toe dam embankment. I was accompanied by John Hardaway of CC6VG. we met Dirk VanZyl of <br />Golder Construction Services, inc., CQA consultant to CCSVG at the location of the sump. The <br />"impromptu sump" had been collecting precipitation run-on from within the closed basin of the <br />phase 1 heap leach ever since the toe dam embankment closed the drainage. The sump had been <br />dewatered by pumping. The riser pie had been removed. Saturated subgrade materials had been <br />excavated from the entire pool area and removed from the basin to dry and place. Dirk <br />reported that, to his surprise, the subgrade materials had apparently only saturated to a <br />depth of approximately six inches. Approximately ten cubic yards of select backfill and <br />underdrain material had been excavated in the immediate vicinity of the riser pipe, exposing <br />the 24-inch diameter perforated underdrain pipe. I examined the select backfill and <br />underdrain matrix material and found neither to have been contaminated by infiltration from <br />the "impromptu sump". <br />Ames construction was in the process of placing and compacting select backfill in the sump <br />area to return the subgrade to design profile following excavation of the saturated material. <br />They were also placing and compacting the hypochlorite-treated soil liner material from the <br />Ironclad heap on the upstream face~of the toe dam embankment immediately adjacent to the <br />"impromptu sump". <br />Deployment of the Textured Lower Geomembrane Layer <br />Gundle crews were deploying and welding the lower textured geomembrane liner fabric <br />immediately northeast of the "impromptu sump" area. Gundle had employed a second <br />installation crew had approximately two dozen laborers deploying and welding four panels of <br />the 80 mil textured VLDPE geomembrane. <br />Arequa Gulch Dnderdrain <br />I examined the preparation of the thalweg of upper Arequa Gulch beneath the proposed <br />relocation of Highway 67. The three underdrain pipelines had been extended to the upslope <br />toe of the relocated roadway embankment. A core trench had been excavated and the pipelines <br />bedded in select backfill. Some groundwater drainage had been encountered and accommodated <br />in the select backfill. While nowhere near as extensive as beneath the phase 1 heap leach, <br />some additional excavation and backfill placement had been completed in a few limited <br />locations to intercept groundwater flow. Some surface water run-on was puddled from snow <br />melt from several days prior to my inspection. The pipeline trench was prepared to be <br />backfilled with the select pipeline bedding material. <br />The Diversion Ditch Culvert <br />Following receipt of BLM release for Cultural and Antiquities Review, Ames construction was <br />excavating the diversion ditch above Route 67. The materials were stockpiled for <br />construction of the double culvert beneath Route 67, several hundred yards west of the <br />Carlton mill. Everything appeared to be progressing appropriately. <br />I & E Contact Address <br />NAME John Hardaway <br />OPERATOR Cripple Creek ~ Victor Gold <br />STREET P.O. Box 191 <br />CITY/STATE/ZIPVictor. CO 80860-0191 <br />cc: Carl Mount, DMG <br />^ CE <br />^ BL <br />^ FS <br />^ HW <br />^ HMWMD (CH) <br />^ SE <br />^ WQCD (CH) <br />^ OTHER <br />