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Interim Guidelines for the <br />Operation of Lake Powell <br />and Lake Mead <br />Lake Powell Operational Tiers <br />(subject to April adjustments or mid-year review modifications) <br />Lake Powell Elevation Lake Powell Operational Tier Lake Powell Active Storage <br />(feet) (maf) <br />3,700 24.32 <br /> Equalization Tier <br /> equalize, avoid spills or release 8.23 maf <br />3,636 - 3,666 - - - - - - - - - - - - - - - - 15.54 -19.29 <br />(see table below) Upper Elevation Balancing Tier (2008 - 2026) <br /> release 8.23 maf; <br /> if Lake Mead < 1,075 feet, <br /> balance contents with a minlmax release of <br /> 7.0 and 9.0 maf <br />3,575 ---------------- 9.52 <br /> Mid-Elevation Release Tier <br /> release 7.48 maf; <br /> if Lake Mead < 1,025 feet, <br /> release 8.23 maf <br />3,525 ---------------- 5.93 <br /> Lower Elevation Balancing Tier <br /> balance contents with a minlmax release of <br /> 7.0 and 9.5 maf <br />3,370 0 <br />April adjustments to Lake Powell operations in the Upper Elevation Balancing Tier (as <br />specified in Sections 6.B.3. and 6.B.4.) shall be based on the April 24-Month Study <br />projections of the September 30 system storage and reservoir water surface elevations <br />for the current `Dater Year. Any such adjustments shall not require re-initiation of the <br />AOP consultation process. In making these projections, the Secretary shall utilize the <br />April 1 final forecast of the April through July runoff, currently provided by the <br />National Weather Service's Colorado Basin River Forecast Center. <br />December 2007 ROD -Colorado River Interim Guidelines for <br />50 Lower Basin Shortages and Coordinated <br />Operations for Lake Powell and Lake Mead <br />