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2.04.7 Hydrology Description <br />MINE WATER INFLOW <br />The Red Cliff Mine will initially be developed in a dry coal seam. Based on <br />information from the McClane Canyon Mine, the only area of saturated coal <br />within the permit boundary will be the northeast corner. The projection of this <br />saturated zone is based on the approximate elevation the McClane Canyon <br />mine hit the saturated coal seal, the fact the Munger Canyon mine was dry, <br />and Cameo Seam monitoring well 8-3-10 is dry and monitoring well F-50 is in <br />a saturated zone. As stated above, modeling has predicted the pumping rate <br />from the Red Cliff Mine would average about 50 gpm to maintain <br />dewatered working conditions in the mine. <br />Should the Red Cliff mine discharge water, the water quality should be similar <br />to the McClane Canyon Mine discharge. McClane Canyon Mine's discharge <br />monitoring reports from 2002 to 2007 show Electrical Conductance (EC) <br />values ranging from 1,798 to 2030 with a average of 1918 umhos/cm, <br />TDS values ranged from 705 to 3250 with and average of 1814 mg/I and <br />pH ranged from 7.3 to 8.7 with an average of 8.1. Based on the analysis <br />of mine discharge presented in Volume III, Exhibit 3, iron concentrations <br />ranged from <0.01 to 0.07. Manganese concentrations ranged from <0.01 <br />to 0.057. <br />(4) A description of the maps prepared according to the standards of rule 2.10 <br />follows: <br />(4)(a) The locations of water supply intakes, ditches, reservoirs, and wells within a <br />one mile minimum radius of the affected area are shown on Map 23, Water <br />Rights Location. <br />Current users of surface water flowing into, out of, and within the hydrologic <br />area are the landowners who irrigate land along East Salt Creek and Big Salt <br />Wash. <br />The mine water discharge point, mine water flow path and sediment pond <br />outfalls are shown on Map 23. There are approximately 40,000 feet of <br />ephemeral channel between the mine discharge point and East Salt Creek. <br />Similarly, lengthy ephemeral channels separate the sediment ponds from Salt <br />• Creek. It is unlikely surface flow from the mine will reach East Salt Creek. <br />Permit Application <br />2.04-39 06/08