Snake River · SN-04
Lower Granite Lock and Dam
Wait-time history, barge traffic and lock information for Lower Granite Lock and Dam on the Snake River. Includes data coverage and source definitions.
- Waterway
- Snake River
- Location
- Pomeroy, WA
- River mile
- 107.5
- Chamber length (ft)
- 675.0
- Chamber width (ft)
- 86.0
- Opened
- 1975.0
Recorded traffic and wait times
| Lock | Waterway | Lockages | Barges | Median commercial wait |
|---|---|---|---|---|
| Lower Granite Lock and Dam (SN-04) | Snake River | 75 | 73 | 0.00 h |
90th-percentile commercial wait: 0.08 hours. Commercial lockages recorded: 25.
Recorded arrivals: 2026-09-05T12:15 to 2026-10-04T11:40 (PST, as reported).
No live status available for this lock.
Page data built 2026-10-05T14:17:12Z. Wait means arrival to start of lockage. Recent completed passages may understate delays while other tows remain waiting. See definitions and limitations.