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Mine water handling and treatment facilities are shown on Map 24, Surface Facilities, with water treatment systems
<br />located at the Fish Creek Borehole and Water Treatment Site. Ground water inflows to the mine are pumped from
<br />the underground workings to mine water storage areas in the abandoned and sealed mine workings, then from
<br />sumps in these areas to the surface through mine dewatering boreholes. At the Fish Creek location, mine water is
<br />treated to meet applicable water quality effluent limitations to assure that downstream water rights are not impaired.
<br />The only water right potentially affected in the initial mining area (SWMD) was the TC Area 1 Pit right, which is
<br />adjudicated for 20 acre -feet per year absolute, and 480 acre -feet per year conditional. This right was affected by
<br />use of water under this right for mining and related operations. Given that this right is owned by TC, mitigation of
<br />any impacts to this private water rights resulting from mining and related operations was not necessary. Use and
<br />effects to this water right will continue throughout the mine life. In the unlikely event that mining operations are
<br />proven to impact private water users, TC's extensive water rights would be available for mitigation under the
<br />existing approved Augmentation Plan. The Homestead Ditch on Trout Creek (upstream of any mining activities)
<br />can be utilized as a source of supplemental irrigation water for downstream users in the unlikely event that mining
<br />and related activities were to result in any contamination, diminution, or interruption of flows in the Trout
<br />Creek /Fish Creek system. Supplemental water can also be provided from other righted water sources, and domestic
<br />water can be supplied through a contract hauler to any affected parties.
<br />9- and 10 -Right Gateroad Extension
<br />TC does not reasonably anticipate any impacts to the wells listed in Exhibit 6B or shown on Map I I from mining
<br />the 9- and 10 -Right Gate - roads, given that these wells are relatively shallow and separated from the mine workings
<br />by the Marine Shale. This unit effectively acts as an aquiclude between the mine and overlying sandstone units.
<br />Any inflows into the mine, which might occur from the mining of the gate- roads, would be from the Wadge Coal
<br />and Overburden sequence, and none of the wells listed in Exhibit 613 are completed in this geologic sequence.
<br />in the unlikely event that a near- surface well is impacted by the mining operations, alternatives, including the use of
<br />righted water supplies, are available that could be used to address this impact under the approved Augmentation
<br />Plan. Potential alternatives to address any water rights impacts for wells include: 1) Repairing the existing well, 2)
<br />Drilling a new well, 3) Providing water from another source, or 4) Hauling water from Steamboat Springs.
<br />Eastern, Northern, and Western Mining Districts
<br />Tables 9 and 12, Summary of Ground Water Rights, and Summary of Surface Water Rights, respectively, have
<br />been updated to include all known water rights within the Permit and adjacent areas for historic, current, and
<br />planned future mining. The ongoing monitoring work conducted by TC and Colorado Yampa Coal Company (refer
<br />to Permit C -81 -071) indicates there will be no impacts outside of the permit boundary, therefore, TC does not
<br />anticipate any additional impacts to the quality or quantity of water in Fish Creek, Foidel Creek, Middle Creek, and
<br />Trout Creek systems.
<br />The only adjudicated water supply systems potentially impacted by mining in the EMD are the Ashley Spring No.
<br />1, Corliss Ditch, and rights owned by TC (Rausler Well and Energy Fuels Reservoir No. 1). Actual mining did not
<br />result in any adverse impacts to these systems, except for interruption of flows in the Corliss Ditch, due to
<br />subsidence. TC has included this ditch in its ditch inventory and maintenance schedule, and will evaluate and
<br />complete ditch rehabilitation work, as appropriate, based on this schedule. The only adjudicated water supply
<br />systems potentially impacted by mining in the NMD are the Ashley Spring No. 2, and rights owned by TC (Boettler
<br />Ditch). The Ashley Spring was not affected by the NMD mining activities. The only adjudicated water supply
<br />systems potentially impacted by mining in the WMD are a series of small stock - watering reservoirs and rights
<br />owned by TC (Twentymile Reservoir). Given that the reservoirs are small surface runoff ponds, and based on TC's
<br />mining experience, it is not anticipated that these water rights will be significantly impacted by mining and related
<br />operations. In the unlikely event that any of the stock ponds are adversely impacted, alternatives, including the use
<br />of righted water supplies, are available that could be used to address this impact under the approved Augmentation
<br />Plan. Potential alternatives to address any water rights
<br />TR13 -82 2.04 -39 02/28/13
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