CONTROL STATION | RIVER MILE | MANAGEMENT UNIT |
The Dalles Dam | 191.5 | John Day Dam to Bonneville Dam (Lake Bonneville and Celilo Lake) (River Mile 146.1-215.6) |
John Day Dam | 215.6 | John Day Dam to McNary Dam (Umatilla Lake) (River Mile 215.6-292.0) |
McNary Dam | 292.0 | McNary Dam to Priest Rapids Dam (Lake Wallula and the Hanford Reach) (River Mile 292.0-397.1) |
Priest Rapids Dam and upstream (Wanapum, Rock Island, Rocky Reach, Wells, Chief Joseph, and Grand Coulee Dam) | 397.1+ | Priest Rapids Dam upstream to Canadian Border (River Mile 397.1-745.0) |
Chief* Joseph | Wells & Rocky Reach Rock Island & Wanapum* | Priest Rapids | McNary & John Day | The Dalles | ||
Jan | 10 | 10 | 50 | 20 | 20 | |
Feb | 10 | 10 | 50 | 20 | 20 | |
Mar | 10 | 10 | 50 | 50 | 50 | |
Apr | 1-15 | 20 | 20 | 50 | 50 | 70 |
16-25 | 20 | 30 | 50 | 70 | 70 | |
26-30 | 20 | 50 | 50 | 70 | 70 | |
May | 20 | 50 | 50 | 70 | 70 | |
June | 1-15 | 20 | 50 | 50 | 70 | 70 |
1 6-30 | 10 | 20 | 50 | 50 | 50 | |
Jul | 1-15 | 10 | 20 | 50 | 50 | 50 |
16-31 | 10 | 50 | 50 | 50 | 50 | |
Aug | 10 | 50 | 50 | 50 | 50 | |
Sep | 10 | 20 | 36 | 50 | 50 | |
Oct | 1-15 | 10 | 20 | 36 | 50 | 50 |
16-31 | 10 | 20 | 50 | 50 | 50 | |
Nov | 10 | 10 | 50 | 50 | 50 | |
Dec | 10 | 10 | 50 | 20 | 20 | |
* | As provided in WAC 173-563-050(1), the minimum instantaneous flows set forth in this subsection are subject to a reduction of up to twenty-five percent during low flow years, except that in no case shall the outflow from Priest Rapids Dam be less than 36,000 cfs. For the reach from Grand Coulee through Wanapum, minimum instantaneous flows shall be as shown above, or as necessary to maintain minimum flows (subject to low runoff adjustment) at Priest Rapids, whichever is higher. |
Chief Joseph* | Wells & Rocky Reach* | Rock Island & Wanapum* | Priest Rapids | McNary | John Day | The Dalles | ||
Jan | 30 | 30 | 30 | 70 | 60 | 60 | 60 | |
Feb | 30 | 30 | 30 | 70 | 60 | 60 | 60 | |
Mar | 30 | 30 | 30 | 70 | 60 | 60 | 60 | |
Apr | 1-15 | 50 | 50 | 60 | 70 | 100 | 100 | 120 |
16-25 | 60 | 60 | 60 | 70 | 150 | 150 | 160 | |
26-30 | 90 | 100 | 110 | 110 | 200 | 200 | 200 | |
May | 100 | 115 | 130 | 130 | 220 | 220 | 220 | |
Jun | 1-15 | 80 | 110 | 110 | 110 | 200 | 200 | 200 |
16-30 | 60 | 80 | 80 | 80 | 120 | 120 | 120 | |
Jul | 1-15 | 60 | 80 | 80 | 80 | 120 | 120 | 120 |
16-31 | 90 | 100 | 110 | 110 | 140 | 140 | 140 | |
Aug | 85 | 90 | 95 | 95 | 120 | 120 | 120 | |
Sep | 40 | 40 | 40 | 40 | 60 | 85 | 90 | |
Oct | 1-15 | 30 | 35 | 40 | 40 | 60 | 85 | 90 |
16-31 | 30 | 35 | 40 | 70 | 60 | 85 | 90 | |
Nov | 30 | 30 | 30 | 70 | 60 | 60 | 60 | |
Dec | 30 | 30 | 30 | 70 | 60 | 60 | 60 | |
* | For the reach from Grand Coulee through Wanapum, minimum average weekly flows shall be as shown above, or as necessary to maintain minimum flows (subject to low runoff adjustment) at Priest Rapids, whichever is higher. As provided in WAC 173-563-050(1), the minimum average weekly flows set forth in this subsection are subject to a reduction of up to twenty-five percent during low flow years, except that in no case shall the outflow from Priest Rapids Dam be less than 36,000 cfs. |