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WATER INFORMATION EXHIBIT G <br />1. Surface Water General Discussion <br />The surface water features within and near the permit area are the Montrose West Canal and the <br />Ouray Ditch which are approximately 300 feet east of the mining area boundary. The irrigation <br />ditches only run during irrigation season, which varies yearly but is normally from the start of <br />April to the end of October. Existing stormwater on the terrace either infiltrates through the <br />gravel or runs off through the un -named drainages. Surface water within the disturbed area will <br />be collected during mining in the northwest portion of the mining area and will infiltrate. No <br />sediment will be allowed to leave the site and cloud any downstream waters. The site will not <br />affect existing water rights, since the pit will not expose groundwater and will not store <br />stormwater for more than 72 hours. <br />After reclamation, stormwater encountered in the mining area will continue to infiltrate or <br />evaporate. <br />2. Hydrology and Sediment Control for Mining <br />Water that is encountered in the pit will not be released from the site. The only water that will be <br />found within the disturbed area is stormwater runoff and water hauled to the mining area and <br />used in processing and for dust control. During topsoil stripping, ditches will lead to the <br />sediment ponds, shown on Map C2 -A, to ensure that no runoff leaves the site. The ponds and <br />bermed areas will contain the 100 year runoff from the area that drains to it. Once the excavation <br />of the pit has started, all water from the disturbed area will drain to the bermed pit and cannot <br />leave the site. More details on the sediment control system and the ponds are shown in <br />Subsection 5 of Exhibit D — Mine Plan. <br />3. Groundwater <br />Since the test pits did not show groundwater and there are no visible seeps or springs, <br />groundwater is not expected to be encountered during mining. While no groundwater is <br />anticipated to be exposed by excavation, if it is exposed, excavation will cease at an elevation of <br />2 feet above the groundwater level. <br />Uncompahgre Pit, February 2013 G -1 <br />