GCDAMP- HFE 2016

SUMMARY

High Flow Experiment- 2016

• Sediment in the system: 962,000 metric tons
• Peak CFS: 35,100 cfs
• Powerplant capacity = 20,100 cfs
• Units available: 6
• Bypass tube capacity = 15,000 cfs
• Estimated acre feet of water bypassed during HFE: 125 kaf
• November volume = 745 kaf
• Hourly Releases before and after HFE: fluctuate between 6,000 to 9,000 cfs
• Estimated costs to hydropower: $1.4 million
• Actual costs to hydropower: TBD
• Direct expenses for removal of concession assets: TBD
• Start Upramp: Nov 7, 2016
• Finish HFE: Nov 11, 2016
• Total HFE duration: 96 hrs
• HFE 2016 represents the 4th controlled high flow release conducted under the HFE Protocol.

CONCERNS

• Angler's concerns regarding a Fall 2016 High flow experiment
• Re-emergence of green sunfish in the -12 Mile Slough
• Increase in brown trout spawning and the increased prevalence of adult brown trout in the Lees Ferry reach since the beginning of the HFE Protocol

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