REP32708 - Laserfiche WebLink

Home Browse Search

Draft West Ells Mine 2005 Annual Hydrology Report 33 • receives water from surface operations, storm runoff, and effluent from the WWTP. Dischazge from MB-2R is typically routed to the North Fork, but can be diverted to Pond FW-1, if necessary. Both Pond MB-1 and Pond MB-2R retain water, so settling of sediment occurs prior to dischazge (batch mode). In WY 2005,.pond MB,1 had a discHarge,of ac ~t and;MB 2R dscharged_ ,:,- ac ff of water to=fhe. North -F`_grk. There were two minor CDPS Permit exceedances for the discharge water quality from Pond MB-1 (outfall 016) in the 151 quarter of 2005 for TSS as detailed in the quarterly Discharge Monitoring Report (DMR) submittals. The reported results for TSS, 30 day average and maximum 7 day average were 42 mg/1 and 80 mg/1 respectively compared to the permit limits of 35 mg/1 and 70 mg/1. Steps were taken to correct the problem and no other exceedances were recorded. 4.3.2 Ponds MB-3, MB-4, and MB-5 Ponds MB-3 and MB-4 receive storm water runoff and wash down water from the Project conveyors, silos, and load out facilities. Pond MB-5 collects only storm water runoff. In WY 2005 porid'MB-4,'collected;'a small'ainount of .water res'u',lfing m discharges of aliout~;ac ft Water` was not discharged from ponds T41B-3 and MB-5 in WY 2004: 4.3.3 Pond FW-1 Pond FW-1 is designed to store raw fresh water from the North Fork diversion intake gallery. Pond FW-1 water is pumped to the WWTP and the Project's domestic water system. If the pond overfills, excess water is discharged back to the North Fork. Water was; riot discharged from.pond FW-1???-in WY 2005. 4.3.4 RPE Pond The RPE Pond collects runoff from the refuse pile expansion area. In WY 2005 no dtsch'atgg oceurned froir the RPE?porid??~: 4.3.5 Pond SG-1 Pond SG-1 was built to collect runoff during and after construction of the mine ventilation shafts. Discharge from SG-1 is routed to Sylvester Gulch. In WY 2005 pond SC~r-I'had:a;discharge.of about _ ac-ft. 4.4 Biomonitoring Testing for Toxicity During WY 2005, MCC conducted biomonitoring tests as required by the CPDS permit. Biomonitoring samples were collected quarterly from the West Fork of the Sylvester Gulch September 2006 HydroGeo, Inc.