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<br />. <br />. <br />. <br />. <br />. <br />t <br />. <br />t <br />. <br />. <br />. <br />. <br />t <br />t <br />t <br />. <br />. <br />. <br />. <br />. <br />t <br />. <br /> <br />Artificial Recharge of Ground Water in Colorado <br />A Statewide Assessment <br /> <br />VI. Inventory of Artificial Recharge Projects in Colorado..................................................... 35 <br />Active Recharge Operations ...................................................................................................35 <br />Lower South Platte River Basin........................................................................................ 41 <br /> <br />San Luis Valley.......................................................................................................... ....... 44 <br />Denver Basin Aquifer Storage and Recovery................................................................... 46 <br />Other Colorado Recharge Operations ............................................................................... 48 <br />Inactive Artificial Recharge Operations ................................................................................. 48 <br />VlI. Statewide Potential for Artificial Recharge/Underground Water Storage........................ 53 <br />Colorado's Aquifer Systems.................................... ........ ...................................................... ..53 <br />Hydrogeologic Conditions Favorable for Recharge ............................................................... 58 <br />Application of AR Technologies to Colorado Aquifers ......................................................... 60 <br />Non-Aquifer Geologic Storage Options ................................................................................. 61 <br /> <br />Abandoned Coal Mines............................................................................................... ...... 61 <br />Abandoned Metal Mines................................................................................................... 65 <br /> <br />Natural Caves..................... ............................................................................................... 68 <br />General Considerations............................................ ........................................................... .... 71 <br />Water Quality Considerations............................................... .................................................. 72 <br />VIII. Artificial Recharge Implementation Options.................................................................... 74 <br /> <br />Aquifer Ranking............ ........... ....................................................................................... ........ 74 <br />Description of Possible Projects .............................................................................................81 <br />Institutional Changes..................................................... ......................................................... 83 <br />IX. Conclusions and Recommendations ................................................................................. 85 <br />X. Selected References .......................................................................................................... 88 <br /> <br />APPENDIX A <br />Inventory of Artificial Recharge Projects in Colorado <br />APPENDIX B <br />Unconsolidated Aquifer Ranking/Decision Matrix Worksheets <br />APPENDIX C <br />Consolidated Aquifer Ranking/Decision Matrix Worksheets <br /> <br />v <br />