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<br />. <br /> <br />,~ <br /> <br />".,:-'r-~ <br /> <br />,~ <br /> <br />':...., <br /> <br />J\1e'l"r.....'""f')ljt2.!; 'Vz.:e::- Supply 'T::.,::-r;.i('"~'!";r~ <br /> <br />Cyt;"("-'.;~'F> '\'---:r~' <br /> <br />securing required intergovernmental cooperation among potential conjunctive use <br />participants, <br /> <br />Effluent Manae:ement involves cooperative and coordinated approaches for utilizing <br />metro Denver area providers' reusable return flows, The metro Denver area currently <br />generates excess reusable return flows of approximately 80,000 acre-feet per year, These <br />excess reusable return flows are projected to increase to more than 120,000 acre-feet per <br />year under providers' current plans as the metro Denver area grows, <br /> <br />Significant cooperative effluent management opportunities exist in all of the metro <br />Denver area sub-regions, However, full use of reusable return flows would eventually <br />require development of additional storage below the Metro wastewater plant and <br />extensive implementation of potable reuse, Potentially high costs, public acceptance, <br />intergovernmental coordination, and effects on water quality and instream flows also are <br />issues of concern, <br /> <br />Interruntible Sunnlv would involve cooperative arrangements with agricultural water <br />users to the north of the metro Denver area that would give cities the right to use <br />agricultural water during times of drought in exchange for financial compensation to <br />farmers. This report provides an overview of possible types of intenuptible supply <br />arrangements, estimates of gross supply potential, and discussion of perceived barriers to <br />implementation, The total amount of dry year high quality water supply potentially <br />available for intenuptible supply arrangements is approximately 190,000 acre-feet. <br />However, example projects involving this source and specific project yields were not <br />investigated. <br /> <br />During the course of analysis, awareness of major legal, institutional, political, <br />geographical, and infrastructure barriers to using this supply in the metro Denver area <br />emerged. These barriers exist for each of the cooperative water supply categories <br />evaluated in the MWSI, but are especially pronounced and evident with respect to the <br />Intenuptible Supply category. Without additional work and dialogue between the metro <br />Denver area and northern Front Range farmers and cornmunities over the next three to <br />five years, intenuptible supply arrangements do not appear, to be promising water supply <br />options for the metro Denver area at this time. <br /> <br />Other Svstems Intee:ration Onnortunities identified in the process of conducting the <br />MWSI are the focus of ongoing studies involving the Northeast and Northwest sub- <br />regions and Chatfield Reservoir. Other cooperative approaches identified but not <br />investigated include possible development of joint storage for regulation of supply from <br />the Windy Gap and Moffat systems, and creation of a market for water saved through <br />conservation initiatives. These ideas will likely be the subjects of future investigations by <br />interested parties, <br /> <br />Vlll <br /> <br />Prepared for the Colorado Water Conservation Board, Colorado Department of Natural Resources by <br />Hydrosphere Resource Consultants. 1002 Walnut Sueet. Suite 200. Boulder, CO 80302 <br />