REP47230 - Laserfiche WebLink

Home Browse Search

EASTSIDE MINE ~~ Summary of 1997 Water Monitoring Extent of Mininq No mining has occurred at the Eastside Mine since December 1994. The buildings and surface facilities were removed from the minesite, the portals were sealed and surface area was regraded in May, June and July of 1995. Eastside Coal Company requested and was granted a Phase I Bond Release in December of 1995. In September of 1995 the disturbed area was reseeded with the approved seed mixture as listed in the approved Mining and Reclamation Permit. The area is inspected on a quarterly basis to ensure the stormwater management plan and sediment control system are functioning properly, Flow and Field Parameters The flow and field parameters of the Harvey Gap Outlet above and below the mine continue to demonstrate the seasonal discharges from the Harvey Gap Reservoir. No significant deviations from the 1985- 1996 data are noted. Chemical Parameters The chemical parameter results of the Harvey Gap Outlet above the mine and below the mine generally fall within the ranges established 1985-1996. The conductivity, pH, alkalinity, dissolved solids, cations, magnesium, sodium, bicarbonate, and sulfate compare favorably with the established ranges for the eleven years of sampling. The values below the mine for 1997 are well within the established levels for pH, conductivity, sodium and sulfate. There was no water discharged from the four inch steel pipe installed in the portal seal from the Eastside Mine. Impacts on Surface and Ground Water No discharge has occurred from sediment pond SP-1 or from the underground mine workings. The water monitoring data are listed on the attached tables found in the Data and Statistical Information section-b@ginning on page 7 to nd including page 12. A comparison of 1996 data with 1984- 96 data indicates no measurable impacts on ground or surface 9