Allegheny River · AG-44
Lock and Dam 4
Wait-time history, barge traffic and lock information for Lock and Dam 4 on the Allegheny River. Includes data coverage and source definitions.
- Waterway
- Allegheny River
- Location
- Natrona, PA
- River mile
- 24.2
- Chamber length (ft)
- 360.0
- Chamber width (ft)
- 56.0
- Opened
- 1927.0
Recorded traffic and wait times
| Lock | Waterway | Lockages | Barges | Median commercial wait |
|---|---|---|---|---|
| Lock and Dam 4 (AG-44) | Allegheny River | 77 | 18 | 0.00 h |
90th-percentile commercial wait: 0.12 hours. Commercial lockages recorded: 17.
Recorded arrivals: 2026-09-04T17:30 to 2026-10-04T16:00 (EST, as reported).
Status snapshot collected: 2026-10-05T14:09Z. Tows pending: 0. Reported four-hour average delay: 0.0 minutes.
Page data built 2026-10-05T14:21:30Z. Wait means arrival to start of lockage. Recent completed passages may understate delays while other tows remain waiting. See definitions and limitations.