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West Elk Mine 2007 Annual Hydrology Report 22 <br />3.2.3 Springs above the B Seam in the Jumbo Mountain Area in the <br />North Fork Drainage Basin <br />3.2.3.1 Spring CR-12 (Decreed Sprinjz#12) <br />Spring CR-12 is located in Lone Pine Gulch north of the NW mine panels (Map 2). It issues from <br />alluvium on the south side of the gulch. This is a perennial spring, but the volume of flow <br />diminishes in summer and autumn. It is recommended that this monitoring station be deleted from <br />the hydrologic monitoring plan, because mining activities have moved well east of the Jumbo <br />Mountain area and there have been no measurable mining-induced impacts at this site. This spring <br />has been monitored since 1993. <br />3.2.3.2 Spring G-26a <br />Spring G-26a is located in Lone Pine Gulch north of the NW mine panels (Map 2). This spring <br />issues from alluvium and flows into a small pond. This spring is seasonal and flow only occurs <br />during peak flow conditions. It is recommended that this monitoring station be deleted from the <br />hydrologic monitoring plan, because mining activities have moved well east of the Jumbo <br />Mountain area and there have been no measurable mining-induced impacts at this site. This spring <br />has been monitored since 1980. <br />3.2.3.3 Spring G-28a <br />Spring G-28a is located in a north tributary to Gribble Gulch (Map 2). It is situated above the <br />westernmost panels in the NW mine panels. This spring issues from alluvium and is seasonal. <br />Flow usually occurs during the peak flow period and accumulates in a stock pond. It is <br />recommended that this monitoring station be deleted from the hydrologic monitoring plan, because <br />mining activities have moved well east of the Jumbo Mountain area and there have been no <br />measurable mining-induced impacts at this site. This spring has been monitored since 1978. <br />3.2.3.4 Spring (Decreed Spring <br />Spring G-31 is located in Gribble Gulch above the east end of the Jumbo Mountain mine panels <br />(Map 2). This spring issues from alluvium and flows into a small pond. It is seasonal and flow <br />usually occurs during wet spring conditions. The pond is often dry in summer and autumn. It is <br />recommended that this monitoring station be deleted from the hydrologic monitoring plan, because <br />mining activities have moved well east of the Jumbo Mountain area and there have been no <br />measurable mining-induced impacts at this site. This spring has been monitored since 1977. <br />• <br />June 2008 HydroGeo, Inc.