Hourly Release Estimates

  • Cu ft/sec
  • Actual flows may vary

JC BoyleFlow estimates below JC Boyle Hydro Project

Table: 5 Days Hourly Avg Flow Rates cu ft/sec
Hour 08/18 08/19 08/20 08/21 08/22
1 400 400 400 400 400
2 400 400 400 400 400
3 400 400 400 400 400
4 400 400 400 600 400
5 400 400 400 600 400
6 400 400 400 600 400
7 400 400 400 600 600
8 600 600 600 600 1000
9 1000 1000 1000 600 1500
10 1500 1500 1500 600 1800
11 1800 1800 1800 1000 1800
12 1800 1800 1800 1500 1800
13 1800 1800 1800 1800 1600
14 1700 1700 1600 1800 1600
15 1700 1700 1600 1700 1600
16 1700 1700 1600 1700 1600
17 1700 1700 1600 1700 1600
18 1700 1700 1600 1700 1600
19 1400 1400 1300 1400 1300
20 900 900 800 900 800
21 600 600 400 600 400
22 400 400 400 400 400
23 400 400 400 400 400
24 400 400 400 400 400

The flow release schedule for the J.C. Boyle Powerhouse is a good faith estimate and not a guarantee that any releases will occur as or when estimated. Operational considerations, mechanical failure, human error or system safety concerns could require changes to this schedule with little or no notice. PacifiCorp provides this information as a courtesy for recreational users of the river and makes no warranty of its accuracy or fitness for any particular purpose.

These flow estimates now include an additional 150-300 cfs of base flow occurs in the JC Boyle bypass reach between the dam and the put-in. It is recommended that all boating parties check the BLM staff gage at the put-in to verify actual flow.

The values listed above are in average cubic feet per second for the 60 minute period beginning with the hour indicated in the above table. Actual flows will vary over the hour when the project is ramping flows up and down.