Laserfiche WebLink
• - Wolf Creek Overburden. Well WWCOV24 monitored this stratum in the <br />south area. Monitoring began in September 2001. This well failed due to <br />a landslide that occurred in April 2003. A replacement well was drilled <br />in September 2004. <br />- Wolf Creek Coal. Wells WWC3 has exhibited a decrease in water levels <br />since 1997, but is still within its historic range. Due to safety <br />concerns because of its proximity to the highwall, WWC4 was abandoned in <br />August 2003. Water levels at Well WWC17 have been on the increase since <br />2000. Well WWC24 existed in the south area, monitoring began in <br />September 2001. This well failed due to a landslide that occurred in <br />April 2003. A replacement well was drilled in September 2004. <br />- Wolf Creek Underburden. Well WWCU24 monitored this stratum in the <br />south area. Monitoring began in September 2001. This well failed due to <br />a landslide that occurred in April 2003. A replacement well was drilled <br />in September 2004. <br />Ground Water Level Summary. Most aquifers at Seneca II-W exhibit a <br />typical seasonal fluctuation. Water levels are highest after the spring <br />runoff, which recharges the aquifer. Often, bedrock aquifers exhibit a <br />lag time between spring runoff and highest water levels. Water levels <br />then decrease as late summer or fall approaches. Wells WSAL12, WW16, <br />WOV14 and WW18 experienced the lowest water levels on record this year. <br />We11s WOV14, WW14, WW17 and WWC17 experienced the highest water levels <br />on record this year. <br />Ground Water Quality. Table 3, Summary of Ground Water Monitoring <br />Wells, describes the wells that were sampled, the sample frequency <br />during this year, and site characteristics. Table 4 shows the ground <br />water parameter list used for all wells. Analyses have been performed by <br />ACZ Laboratory in Steamboat Springs, Colorado since May 31, 1983. ACZ <br />Laboratory performs all analyses by EPA or equivalent methods. Samples <br />are delivered the day of collection to the lab in an iced cooler. <br />Monitoring frequencies for ground water quality may be found in Appendix <br />15-3a of the Seneca II-W PAP. <br />5 <br />