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Final West Elk Mine 2005 Annual Hydrology Report 19 <br />• 3.2.3.7 SDrlnY G-35 <br />Spring G-35 (Jumbo Pipeline & Spring No. 5, decreed spring #18) is on the north flank of Jumbo <br />Mountain in an unnamed drainage west of Gribble Gulch which is tributary to the North Fork. <br />This spring is on the northern edge of the Jumbo Mountain mine panels. This spring issues from <br />alluvium and flows into a holding pond, where water is present during wet climatological cycles. <br />3.2.3.8 Spring C-49 <br />Spring G-49 (Jumbo Spring & Pipeline) is on the north flank of Jumbo Mountain, west of Gribble <br />Gulch, in an unnamed drainage tributary to the North Fork. The spring is north of the Jumbo <br />Mountain mine panels. Flow is perennial, but diminishes in autumn. This spring issues from <br />alluvium and hydrological monitoring measurements are taken at the end of an outflow pipe from <br />an enclosed spring house. <br />3.2.4 Springs above the E Seam in the Dry Fork Drainage Basin <br />3.2.4.1 Spring J-4 <br />Spring J-4 is located in East Gulch, East of Horse Gulch and is tributary to Dry Fork and <br />• Minnesota Creek. It is south of the SE mine panels and north of the South Lease Tract panels. <br />This spring issues from alluvium, is seasonal, and is normally dry in late summer or autumn. <br />3.3 Ground Water Monitoring <br />There are 28 monitored wells in the WY 2005 monitoring program, including four new sites added <br />since WY 2004. In WY 2005 MCC reinitiated monitoring of 4 existing wells: 23H-1, 23-H-2, 23- <br />H-3, and 23-H-4. Wells 23-H-1, 23-H-2, and 23-H-3 were completed in October of 1974 and well <br />23-H-4 was completed in August of 1979. Well 23-H-1 appears to have a compromised plastic <br />casing. According to a 1974 drawdown test document, well 23-H-1 was completed to a depth of <br />604 feet. WY 2005 field data noted "audible water flowing, a possible break in the casing at 135 <br />feet, obstructions at 145 feet and 190 feet, and total depth or a terminal obstruction at 243 feet." <br />Total depth Feld measurements in WY 2005 for well 23-H-2 and well 23-H-3 are actually deeper <br />than the reported completion depth in 1974, 387 feet completed to 376 feet and 243 feet compared <br />to 232 feet, respectively. All four wells had soft bottoms which could affect the total depth <br />measurements and may explain the discrepancies in the two WY 2005 field measurements for well <br />23-H-4, 225 feet and 144 feet. New baseline data for these wells are presented in this report. MCC <br />was unable to monitor five damaged wells: SOM-2-H, SOM-16-H, 96-27-1, SOM-45-H1, and <br />• So. W-1, due to collapsed casings in WY 2005. <br />September 2006 HydrOG¢O, 1nC. <br />