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West Elk Mine 2011 Annual Hydrology Report 32 <br />3.2.3.4 Spring G -31 (Decreed Spring #33) <br />Spring G -31 is located in Gribble Gulch above the east end of the Jumbo <br />Mountain B -seam longwall panels (Map 2). This spring issues from alluvium and flows <br />into a small pond. It is seasonal and flow usually occurs during wet spring conditions. <br />The pond is often dry in summer and autumn. This spring has been monitored since <br />1977. <br />3.2.3.5 Spring G -30 <br />Spring G -30 is located in Gribble Gulch above the east end of the Jumbo <br />Mountain B -seam longwall panels (Map 2). It issues from alluvium, but measurable flow <br />has not been observed since WY 2001. This spring has been monitored since 1977. <br />3.2.3.6 Spring G -25 (Decreed Spring #22) <br />Spring G -25 is located in the Gribble Gulch drainage and is situated north of the <br />Jumbo Mountain B -seam longwall panels (Map 2). It issues from alluvium and flows <br />into a holding pond. This spring has perennial flow which diminishes in late summer. <br />This spring has been monitored since 1977. <br />3.2.3.7 Spring G -35 (Decreed Spring #18) <br />Spring G -35 is located on the north flank of Jumbo Mountain in an unnamed <br />drainage west of Gribble Gulch which is tributary to the North Fork of the Gunnison <br />(Map 2). This spring is situated on the north edge of the Jumbo Mountain B -seam <br />longwall panels. This spring issues from alluvium and flows into a holding pond which <br />has water during wet climatological cycles. This spring has been monitored since 1993. <br />3.2.3.8 Spring G -49a <br />Spring G -49a is located on the north flank of Jumbo Mountain, west of Gribble <br />Gulch, in an unnamed drainage tributary to the North Fork (Map 2). The spring is <br />situated north of the Jumbo Mountain B -seam longwall panels. Flow is perennial, but <br />diminishes in the autumn. This spring issues from alluvium and hydrological monitoring <br />measurements were historically taken at the end of an outflow pipe from an enclosed <br />spring house. In WY 2009 the outflow pipe stopped flowing and several flows have <br />emerged up- gradient and to either side of the spring house. This spring has been <br />June 2012 HydroGeo, Inc. <br />