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<br />APPENDIX A <br /> <br />OPER.4.TINGCRITERIA FOR GLEN CANYON DAM <br />IN ACCORDANCE WITH THE <br />GRAND CANYON PROTECTION ACT OF 1992 <br /> <br />. <br /> <br />These Operating Criteria are promulgated in compliance with section 1804 of Public Law <br />102-575, the Grand Canyon Protection Act of 1992. They are to control the operation of <br />Glen Canyon Dam, conslIUcted under the authority of the Colorado River Storage Project <br />Act. These Operating Criteria are separate and apart from the Criteria for Coordinated Long- <br />Range Operation of Colorado River Reservoirs prepared in compliance with the Colorado <br />River Basin Project Act of 1968. <br /> <br />1. Annual Report <br /> <br />As required in the Grand Canyon Protection Act, a report shall be prepared and submitted to <br />Congress annually that describes the operation of Glen Canyon Dam for the preceding water <br />year and the expected operation for the upcoming water year. The annual plan of operations <br />shall include such detailed rules and quantities as are required by the Operating Criteria <br />contained herein. It shall provide a detailed explanation of the expected hydrologic <br />conditions for the Colorado River immediately below Glen Canyon Dam. <br /> <br />2. Review of Criteria <br /> <br />The Secretary shall review these Operating Criteria as the result of actual operating <br />experiences to determine if the Operating Criteria should be modified to better accomplish <br />the purposes of the Grand Canyon Protection Act. Such a review shall be made at least every <br />five years in consultation with the appropriate federal agencies, Governors of the Colorado <br />River Basin States, Native American tribes, representatives of academic and scientific <br />communities, environmental organizations, the recreation industry, and contractors for the <br />purchase of federal power produced at Glen Canyon Dam. <br /> <br />. <br /> <br />3. Specific Operational Constraints <br /> <br />The plan of operations will follow the description of the preferred alternative (Modified Low <br />Fluctuating Flow) in the GCDEIS and the ROD. The specific criteria are as follows: <br /> <br />Minimum Releases - 8,000 cfs between 7:00 a.m. and 7:00 p.m. and 5,000 cfs at night. <br /> <br />. Maximum Releases - 25,000 cfs. Several circumstances warrant exception to this <br />restriction. These are the beach/habitat-building flows and the habitat maintenance flows <br />(both described below) and the release oflarge volumes of water to avoid spills or floodflow <br />releases from Glen Canyon Dam. These latter releases would most likely result from high <br />snowmelt runoff into Lake Powell; if such higll releases above 25,000 cfs are required, they <br />shall be made at constant daily flow rates. <br /> <br />~ <br />