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i" ~ ( .:~ .......t'1 . '-' . . ~- 4 occur when existing water rights held by municipalities and industrial users are out of pri ority. Rued i II water sales wi 11 supplement these rights in periods of reduced streamflow. The monthly demand for Ruedi Round II water sales for the period 1948-82 is displayed in Table 1. As indicated in Table 1, the most frequent requests for water from parties interested in purchasing Ruedi II water are anticipated to occur in the months of August, September, and October. These are the months when demand for water in the Colorado River usually exceeds supply and many junior appropriators are out of priority and in need of augmentation water. Table I also displays the apparent need for water to be supplied through the low flow-winter months in some years, due to the year-round water demands of oil shale and other industrial projects. In the event of water shortages, delivery to contractors for municipal service will first be reduced proportionately up to 15 percent of their respective contracted amounts. Should further shortages occur, municipal contractors will share reductions equally with industrial contractors. The rationale for the Ruedi Round II hydrologic analysis is contained in Reclamation's environmental assessment and models. The Service assumes that this analysis and the data that have been provided are reasonable and correct. Green Mountain Reservoir Water Marketino Prooram Information presented in this section was obtained from the biological assessment submitted by Reclamation, dated June 1985; The assessment addressed only the impacts of the maximum water sales scenario; therefore, the consultation for Green Mountain sales is based on that maximum sales level. Green Mountain Reservoir, located in the headwaters of the Colorado River, was constructed in the early forties as a feature of the Colorado-Big Thompson Project. Green Mountain Reservoir has a storage capacity of 153,639 af, of which 52,000 af is set aside as replacement water to offset water diverted to the east slope. The yield from remaining capacity (the 100,OOO-acre-foot pool) is available for beneficial use in Western Colorado. Green Mountain Reservoir is strategically located as a source of water for augmentation purposes. The reservoir is geographically located above the two major senior downstream water rights that effectively control administration of Colorado River water upstream of the confluence of the Colorado River and the Gunnison River. These two major water rights are the Shoshone Powerplants, located in Glenwood Canyon and operated by the Public Service Company of Colorado, and a number of Grand Valley irrigation water rights, collectively referred to as the Cameo call. The Shoshone Powerplant has a 1903 water right for 1,250 cfs, as well as a more junior water right for an additional 158 cfs. The Cameo call is made up of a number of different water rights, all with senior 'appropriation dates before 1920. The total volume of the Cameo call is approximately 2,200 cfs.