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<br />A~ACBJIBJlT <br /> <br />GLBIf CAHYON DAM IIlTERIII OPERATING CRITERIA <br /> <br />Parameter Hiatorical <br /> <br />Max. <br />Release 31,500 <br />(cta) <br /> <br />Min. <br />Release 3,000/1000 <br />(cta) <br /> <br />Ramp Rates <br />cfa/hr. <br />Up No Limit <br /> <br />Down No Limit <br /> <br />Daily <br />Change 30,500 <br />(cts) <br /> <br />SUMMARY OF PRELIMINARY PROPOSALS <br /> <br />June 25, 1991 <br /> <br />R/S Group E/RM Group USBR Option <br /> <br />WAPA <br /> <br />20,000 20,000 20,000(1)(2) <br />22 , 000 (3 ) <br /> <br />31,500 <br /> <br />5,000 8,000 5,000(4) <br /> <br />3,000/ <br />5,000 <br /> <br />4 hourll hour <br /> <br />2,000 2,000 8,000/4,000(4) <br /> <br />1,000 1,000 4,800/2,000(1) <br />8,000/2,500(2) <br />(3) <br /> <br />No Limit <br /> <br />4,000/ <br />5,000 <br /> <br />8,000(1) <br />5,000 5,000 11,000(2) <br />15,000(3) <br /> <br />No Limit <br /> <br />R/S Group. Research /Scientific Group - Recommendations For Interim Operating <br />Procedures For Glen Canyon Dam - April 10, 1991 <br /> <br />E/RM Group . Ecological/Resource Managers - Letter Report - Review of Interim <br />Flow Recommendations - March 29, 1991 <br /> <br />USBR . Bureau of Reclamation - Presented at Cooperating Agencies meeting <br />on June 13 - 14, 1991, including a phased approach which was dropped from <br />consideration. <br /> <br />WAPA . Western Area Power Administration - Letter and Concept of Interim <br />Operating Criteria - May 22, 1991 - Comments on the WAPA concept was submitted <br />by the Colorado River Energy Distribution Association and the Upper Colorado <br />River commission on May 29, 1991. <br /> <br />Notes. <br />(1) Low monthly volume - less than 600,000 acre-feet <br />(2) Medium monthly volume - 600,000 to 800,000 acre-feet <br />(3) High monthly volume - over 800,000 acre-feet <br />( 4) All montha <br /> <br />5 <br />