Ouachita and Black Rivers · OB-04
Thatcher Lock and Dam
Wait-time history, barge traffic and lock information for Thatcher Lock and Dam on the Ouachita and Black Rivers. Includes data coverage and source definitions.
- Waterway
- Ouachita and Black Rivers
- Location
- CALION, AR
- River mile
- 281.7
- Chamber length (ft)
- 600.0
- Chamber width (ft)
- 84.0
- Opened
- 1984.0
Recorded traffic and wait times
| Lock | Waterway | Lockages | Barges | Median commercial wait |
|---|---|---|---|---|
| Thatcher Lock and Dam (OB-04) | Ouachita and Black Rivers | 1 | 0 | No commercial wait sample |
Recorded arrivals: 2026-09-15T08:00 to 2026-09-15T08:00 (CST, 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.