Laserfiche WebLink
RAG, Empire Corporation 1999 AHR <br />• and high rainfall diluting the water. <br />SPRINGS <br />FLOWS <br />One spring on the mine site area is being monitored. The spring is the #1 Strip Pit <br />Discharge. The #1 Strip Pit Discharge is an NPDES monitoring point (Outfall 022). <br />There are a few other springs and local permanent "damp spots" in the area; however, <br />their combined flow is normally less than 10 gpm and is therefore not significant. The <br />annual discharges for the #1 Strip Pit are presented in Figure 25 and the 1999 <br />discharge measurements are presented on Figure 26. The discharge from the #1 <br />Strip Pit increased significantly in 1989. This may have been due to seepage from the <br />• ditch that conveys the 7 North Angle discharge. The 7 North Angle discharge began <br />in January of 1989. However, discharge rates from 1990 through 1993 are <br />considerably lower and within the range observe during 1982 through 1986. <br />Nevertheless, snowmelt and ditch seepage both appear to have some influence on <br />the Strip Pit discharge, as the discharge generally drops to just a few gpm from <br />January through May with a small peak in March coinciding with spring runoff. <br />WATER QUALITY <br />The summary of the water quality data for the spring is presented in Tables 31 and 32. <br />A plot of dissolved solids for the #1 Strip Pit is presented in Figure 27 and iron <br />concentrations are presented on Figure 28. Figure 27 indicates that the dissolved <br />Page 11 <br />