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<br />In 2005, scheduled maintenance activities at Glen Canyon Dam power plant will require that one or <br />more of the eight generating units at Glen Canyon Dam periodically be offline. Coordination <br />between Reclamation offices in Salt Lake City, Utah, and Page, Arizona, will take place in the <br />~cheduling of maintenance activities to minimize impacts, including those on experimental releases. <br /> <br />During water year 2005, the minimum release objective of 8.23 maf (10,150 mcm) will be made <br />under the most probable, minimum probable, and maximum probable inflow conditions. If:inflow to <br />Lake Powell is greater than the maximum probable inflow volume, releases greater than 8.23 maf <br />(10,150 mcm) will be made in 2005 to equalize storage between Lakes Powell and Mead, if storage <br />in Lake Powell is projected to be greater than 14.85 maf (elevation 3,630 feet) on September 30, <br />.. 2005, and active storage in Lake Powell is greater than active storage in Lake Mead. Under most <br />probable inflow in 2005, the projected water surface elevation at Lake Powell on September 30, <br />2005, will be 3,569 feet (l,088 meters) with 9.0l maf (11,100 mcm) of storage (37 percent of <br />capaCity). <br /> <br />Because ofless than full storage conditions in Lake Powell resulting from five consecutive years of ... <br />below normal runoff, releases for dam safety purposes are highly unlikely in 2005. Ifimplemented, <br />releases greater than powerplant capacity would be made consistent with the 1956 Colorado River <br />Storage Project Act, the 1968 Colorado River Basin Project Act, and the 1992 Grand Canyon <br />Protection Act. Reservoir releases in excess of powerplant capacity required for dam safety purposes <br />during high reservoir . conditions maybe used to accomplish the objectives of the BeachlHabitat <br />Building Flow according to the terms contained in the Glen Canyon Dam ROD and as published in <br />tile Glen Canyon Dam Operating Criteria (62 Federal Register 9447, Mar. 3, 1997). <br /> <br />Daily and hourly releases in 2005 will be made according to the parameters of the ROD for the Glen <br />Canyon Dam Final Environmental hnpact Statement (GCDFEIS) preferred alternative arid the Glen <br />Canyon Dam Operating Criteria, as shown in Table 3. Exceptions to these parameters may be made <br />during power system emergencies, or for purposes ofhumamtarian search and rescue. Experimental <br />flows implemented in 2005 may also require that releases (:xceed the parameters ofthe Glen Canyon <br />Dam Operating Criteria during the winter months of2005. <br /> <br />16 <br />