1. Summit County State of the River
2018 Operations Update
Kalsoum Abbasi, P.E.
Colorado Springs Utilities
May 2, 2018

2. Yield Forecast
April 1 Hoosier Pass: 89%
Current: 103%

3. Yield Forecast
April 1 streamflow forecasts (50% exceedance probability):
Dillon Reservoir Inflow 84% (May 1 ESP ~ 85%)
Green Mountain Reservoir Inflow 82% (May 1 ESP ~ 81%)
Colorado River near Dotsero 80% (May 1 ESP ~ 72%)
Forecast based on Hoosier Pass SNOTEL and NRCS streamflow forecasts – April: 11,000 acre-feet
HOWEVER, doubtful that the river call will allow full diversion

4. Average Diversions & Supply
April 1 yield forecast:
11,000 acre-feet
Average Blue River yield: 13,300 acre-feet
Average Blue River diversion: 7,700 acre-feet
Affected by:
Terminal storage
South Platte River call

5. 2018 Operations Expect May yield forecast to be similar to April
Probably skewed too high based on conditions in the rest of the basin
May divert approximately 6 – 8 KAF
Terminal storage is average for this time of year
May be called out by senior rights early
Anything not diverted is bypassed to Blue River

6. Blue River Operations
Questions?