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West Elk Mine 2006 Annual Hydrology Report 21 <br />have moved well east of the Jumbo Mountain area and there have been no measurable mining- <br />induced impacts at this site. <br />3.2.3.4 Sprin$ G-31 <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. <br />3.2.3.5 Wiring G-30 <br />Spring G-30 is located in Gribble Gulch above the east end of the Jumbo Mountain mine panels <br />(Map 2). It issues from alluvium, but measurable flow has not been observed since WY 2001. 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. <br />• 3.2.3.6 Spring G-25 <br />Spring G-25 is located in the Gribble Gulch drainage and is situated north of the Jumbo Mountain <br />mine panels (Map 2). It issues from alluvium and flows into a holding pond. This spring has <br />perennial flow which diminishes in late summer. It is recommended that this monitoring station be <br />deleted from the hydrologic monitoring plan, because mining activities have moved well east of the <br />Jumbo Mountain area and there have been no measurable mining-induced impacts at this site. <br />3.2.3.7 Wiring G-35 <br />Spring G-35 is located on the north flank of Jumbo Mountain in an unnamed drainage west of <br />Gribble Gulch which is tributary to the North Fork (Map 2). This spring is situated on the north <br />edge of the Jumbo Mountain mine panels. This spring issues from alluvium and flows into a <br />holding pond which has water during wet climatological cycles. It is recommended that this <br />monitoring station be deleted from the hydrologic monitoring plan, because mining activities have <br />moved well east of the Jumbo Mountain area and there have been no measurable mining-induced <br />impacts at this site. <br />C] <br />December 2007 HydroGeo, Inc. <br />