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5.0 Ground Water Information <br />The data collected, from Oxbow's groundwater monitoring sites, along with the results of <br />laboratory analysers are presented in Exhibit 2 -Groundwater Information. <br />The following site: discussions are presented from west to east through the OMLLC property. <br />H-10 Well - B-Seam -Somerset Mine Workings -Hubbard Creek Drainage <br />The sealing of all of the abandoned Somerset Mine portals has precluded access into the mine to <br />obtain underground mine water samples from those abandoned workings. Instead, since the <br />Somerset mine was closed in 1985, monitoring wells H-10 and B-6 have historically been <br />utilized to monitor potential groundwater inflow and quality in order to predict the extent of <br />flooding in the abandoned underground workings. Monitoring water levels in these two wells <br />serves as a valuable predictive tool as to whether water from flooded mine workings could <br />impact the hydrologic balance. <br />The H-10 well is located in Hubbard canyon near the western limit of underground B seam <br />mining of the Somerset mine and near the north or down-gradient limit of the old mine workings <br />in that specific area. The elevation of the B seam in the well is ~ 6010 feet. From 1987 to 1989, <br />the water level in H-10 held steady at about elevation 6028 feet, and then in 1992 rose to <br />approximately 6C168 feet in elevation. From 1989 until 1999, the water level ranged from 6067 <br />• feet to 6069 feet in elevation. In October1999 and 2000 through 2007 no water could be <br />measured in the well. <br />This lack of water in the well suggests that there is no longer a significant inflow into the <br />abandoned mine workings in this vicinity. The Somerset mine workings in this vicinity appear <br />to be having no impact to the local hydrologic balance. <br />Starting in 2006, the H-10 well will also be used to monitor any B seam water level resulting <br />from the transfer of water from the D seam workings to the B seam workings through borehole <br />D2B21ocated in the vicinity of the Hubbard Fansite. <br />B-6 Well - B Seam -Somerset Mine Workings -Bear Creek Drainage <br />The B-6 monitor well is no longer in service and the following discussion is presented for <br />historical reference. <br />The B-6 well is also located in adown-gradient location in the abandoned Somerset Mine <br />workings in the vicinity of Bear Creek canyon. The elevation of B seam in this vicinity is 5925 <br />feet. In monitoring the B-6 well, the historical fluctuation of water levels has been different than <br />experienced in well H-10. After initially rising to elevation 6035 feet, the water level fell to <br />elevation 6014 feet in 1990. Water levels then recovered, with an increase to elevation 6033 feet <br />in 1992, and rising to elevation 6051 feet in 1993. The water level ranged from 6038 feet to <br />• 6048 feet in 1994 and 1995, and then rose to elevation 6054 feet in 1997. In 1998 the water level <br />ranged between 6052 and 6053 feet in elevation. <br />11 <br />