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through 1994 are shown in Appendix I. These projections are fairly stable through the budget period. FY 1990 costs are slightly higher because of additional funds required for programming and implementing an automated power billing procedure in Western's Loveland Area Office. The annual O&M expense estimate for FYs 1990 through 1994 is taken from Western's and Reclamation's FY 1990 Congressional budgets. The FYs 1995 through 2080 O&M estimates are an average of 5 years of historic data (FYs 1984 - 1988), converted to a current (FY 1989) price level by the Reclamation O&M index; the current FY 1989 budgeted O&M; and the future 5-year budgeted (FYs 1990-1994) O&M costs. a. Glen Canyon Environmental Studies. The operating standards for the Upper Colorado River stipulate that Reclamation will release at least 8.3 million acre-feet of water annually from the CRSP reservoirs for use in the Lower Basin. The standards also provide for a summer (Easter to Labor Oay) minimum release of 3,000 cubic feet per second (cfs) and a winter minimum release of 1,000 cfs through Glen Canyon Dam. The maximum release through the dam is 31,500 cfs. There has been growing concern that these flows are damaging the Lower Colorado River streambed and the plant and animal life it supports. The Glen Canyon Environmental Studies (GCES) are a multiagency effort to analyze the impact of Glen Canyon Dam operations on the environmental, recreational, and commercial resources of the lower Colorado River. The first study, referred to as Phase I, concluded in September 1987. It was done under adverse water conditions, in a dry year, preventing a thorough study. It focused on the environmental and recreational aspects of dam operations. A review of the study by the National Academy of Sciences pointed up the need for more comprehensive data. A new study, Phase II, charged with gathering that information, is now under way. Concurrently with these studies, the Secretary of Interior decided to prepare an environmental impact statement (EIS) for Glen Canyon Dam operations. Phase II of the GCES will coincide with preparation of the EIS. Because cost information was not available when Reclamation prepared its FY 1990 Congressional Budget, no future study expenses were included in the FY 1989 CRSP Preliminary PRS. In past years, the annual study costs assigned to power averaged approximately $1 million. These costs will be included in Reclamation's FY 1991 Congressional Budget. The FY 1989 CRSP Final PRS may contain an annual GCES cost to power of $1 million for FYs 1990 through 1994. 13