Lower Granite Bypass and Spillway Analyses
Data Courtesy of U.S. Army Corps of Engineers, NWD and Pacific States Marine Fisheries Commission
PIT Tag Lower Granite Bypass and Spillway Queries
Lower Granite Bypass and Spillway Juvenile and Adult Daily Summary
Last Update: January 09 2026 07:25:01.
| Calendar Date | Spill Conditions | Juveniles | Adults | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Outflow (daily avg) kcfs |
Spill (daily avg) kcfs |
Spill Hours All Bays |
Spill Hours Spillbay 1 |
Percent Spill in Spillbay 1 |
Chinook | Steelhead | Coho | Sockeye | Chinook | Steelhead | Coho | Sockeye | |||||||||
| Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | ||||||
| Calendar Date | Spill Conditions | Juveniles | Adults | ||||||||||||||||||
| Outflow (daily avg) kcfs |
Spill (daily avg) kcfs |
Spill Hours All Bays |
Spill Hours Spillbay 1 |
Percent Spill in Spillbay 1 |
Chinook | Steelhead | Coho | Sockeye | Chinook | Steelhead | Coho | Sockeye | |||||||||
| Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | Spillway (GRS) | Bypass (GRJ) | ||||||
| YTD Total | 2 | ||||||||||||||||||||
| 2026-01-08 | 48.9 | 0.0 | 0 | 0 | 0.0 | ||||||||||||||||
| 2026-01-07 | 42.3 | 0.0 | 0 | 0 | 0.0 | ||||||||||||||||
| 2026-01-06 | 43.5 | 0.0 | 0 | 0 | 0.0 | ||||||||||||||||
| 2026-01-05 | 45.6 | 0.0 | 0 | 0 | 0.0 | ||||||||||||||||
| 2026-01-04 | 40.6 | 0.0 | 0 | 0 | 0.0 | ||||||||||||||||
| 2026-01-03 | 41.9 | 0.0 | 0 | 0 | 0.0 | 1 | |||||||||||||||
| 2026-01-02 | 38.2 | 0.0 | 0 | 0 | 0.0 | 1 | |||||||||||||||
| 2026-01-01 | 37.3 | 0.0 | 0 | 0 | 0.0 | ||||||||||||||||
Lower Granite Bypass and Spillway Juvenile Downstream Detections Summary by Species
Last Update: January 09 2026 07:25:01.
No detections for 2026.