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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Artificial Recharge of Ground Water in Colorado <br />A Statewide Assessment <br /> <br />Inactive AR Operations............................................................................................................. 49 <br /> <br />VII. Statewide Potential for Artificial RechargelUnderground Water Storage........................ 54 <br /> <br />Colorado's Aquifer System....................................................................................................... 54 <br /> <br />Hydrogeologic Conditions Favorable for Recharge ................................................................. 59 <br />Application of AR Technologies to Colorado Aquifers ........................................................... 61 <br />Non-Aquifer Geologic Storage Options .......... ............................ ............................................. 62 <br /> <br />Abandoned Coal Mines......................................................................................................... 62 <br /> <br />Abandoned Metal Mines....................................................................................................... 66 <br /> <br />Natural Caves ............ .................................................... ....... .... ............................................. 69 <br /> <br />General Considerations............................................................................................................. 72 <br /> <br />Water Quality Considerations................................................................................................... 73 <br />VIII. Artificial Recharge Implementation Options.................................................................... 75 <br /> <br />Aquifer Ranking........................................................................................................................ 75 <br /> <br />Description of Possible Proj ects ............................................................................................... 82 <br /> <br />Institutional Changes................................................................................................................ 84 <br /> <br />Conservation............................................................................................................................. 84 <br /> <br />IX. Conclusions / Recommendations...................................................................................... 86 <br /> <br />X. Selected References.............................................................................................................. 89 <br /> <br />v <br />