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(, I,. ,', .) l') \! \}li ~pn municipal water supply. There are two separate water right priorities associated with the Continental-Hoosier System, summarized as follows: 1929 Water Rights IADDroDriation Date August 5. 1929) East Hoosier Creek 40 cfs Hoosier Creek 20 cfs Bemrose Creek (Silver Creek) 17 cfs TOTAL 77 cfs 1948 Water.Riahts IADDroDriation Date Mav 13. 1948\ East Hoosier Creek 50 cfs Hoosier Creek 40 cfs Bemrose Creek (Silver Creek) 20 cfs Crystal Creek 40 cfs Spruce Creek 60 cfs McCullough Gulch 60 cfs Monte Cristo Creek 200 cfs Interceptor Ditch (to Tunnel) 50 cfs Tunnel Seepage 20 cfs TOTAL 540 cfs .. The priority dates are of particular importance because the 1929 water rights are senior to the water rights at Green Mountain Reservoir and Denver's storage and direct flow water rights used at Dillon Reservoir and the Roberts Tunnel, whereas the 1948 water rights are junior. The yield to the 1929 water rights is generally controlled by an administrative "call" from the Shoshone Power Right in Glenwood Canyon. At other times, the yield is limited primarily by the physical water supply at the various diversion headgates. Diversions typically occur from April through October, with the majority in May through September. In accordance with the stipulations contained in the "Blue River Decree" (Civil Actions No. 2782, 5016 and 5017), the total diversions at the Continental-Hoosier System" ....shall not exceed in any calendar year. ten percent of the natural flow of the Blue River near Dillon below its confluence with the Snake River and Ten Mile Creek." It is also noted that the 1929 water rights are decreed for diversion only from three relatively small drainage basins near the top of Hoosier Pass. The tributary drainage area available to the 1929 water rights (2 sq.mi.) represents about 14% of the total drainage basin tributary to the entire collection system (approximately 14.3 sq.mi.). Records of the total diversions through the Hoosier Tunnel are available from the USGS for the entire CROSS study period, 1974 through 1991. For this period, the average annual diversion was approximately 8,840 acre-feet per year. According to Colorado Springs personnel, the capacity of the Hoosier Tunnel is estimated at about 500 cfs. The Boreas Pass Ditch (WOlD 3646851 is a very small ditch structure that diverts water from the headwaters of Indiana Creek, a tributary of the Blue River and delivers it into the headwaters of North Tarryall Creek, a tributary of the South Platte River (Irrigation Division 11. 2