10825 Water Supply Alternative Summary Phase 2 Assessment January 2008 Draft

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Table 2 Recovery Program Water Sources Figure 2 Grn Mtn Wolford Study 10825 Ruedi 5 + HUP Mtn Fish ■ Wolford 6K Pool Year Year Water 5 Water Surplus Pool Total Dry 1977 10,825 AF 5,000 AF 0 AF 6,000 AF 21,825 AF Below Average 1988 10,825 AF 10,000 AF 15,000 AF 6,000 AF 41,825 AF Above Average 1982 10,825 AF 10,000 AF 30,000 AF 0 AF 50,825 AF Wet 1983 1 10,825 AF 10,000 AF 45,000 AF 0 AF 65,825 AF In coordination with the USFWS, we have developed potential release schedules for each of the four study years. These release schedules are for the July through October period, and are based on the basic operational principles described in the memo Release Schedules for 10825 Alternatives, which is available on the project website. The operating /release principles are for use in this study only, and are based upon the experience and professional judgment of the USFWS and others. The release schedule for the below average study year of 1988 is illustrated below. The release schedules used in this study are not binding, nor are they formalized in any specific agreement. (See related memo for other study years.) Please note that these release patterns benefit from hindsight, and that actual Recovery Program releases in the future may or may not occur in a manner consistent with the simulations and assumptions used in this study. 10,825 Venter Supply Study Phase ? Alternatives Assessment January 2008 Draft 6 Figure 2 15 Mile Reach Streamflow (Below Avg 1988) 2000 O 15 Mile Target 1,240 cfs ■ Wolford 6K Pool 1800 O Grn Mtn HUP Surplus 1600 ❑ Ruedi 5K + 5K 1400 ®10825 Water 0 Future Discharge w/o Fish Water (cfs) 1200 1000 800 600 400 200 0 7�4/ is 2y 12949 26q`9 9sPp 2�?sep Oct )Oct ✓4/ ✓4/ 10,825 Venter Supply Study Phase ? Alternatives Assessment January 2008 Draft 6