Lock and Dam 20
Canton, MO • Upper Mississippi River
- VHF
- 13/14 verify
- Phone
- Verify current USACE district/CorpsLocks
Great Loop Planning Resource
Missouri Great Loop Locks
Explore 4 reviewed public Great Loop lock references in Missouri, including locations, VHF channels, phone numbers, waterways, and planning notes.
275Reviewed public locks
19States / provinces
29Waterways
275Total imported reference rows
No reviewed lock markers match the current filters.
Lock and Dam 22
Saverton, MO • Upper Mississippi River
- VHF
- 13/14 verify
- Phone
- Verify current USACE district/CorpsLocks
Lock and Dam 24
Clarksville, MO • Upper Mississippi River
- VHF
- 13/14 verify
- Phone
- Verify current USACE district/CorpsLocks
Lock and Dam 25
Winfield, MO • Upper Mississippi River
- VHF
- 13/14 verify
- Phone
- Verify current USACE district/CorpsLocks
No reviewed public lock rows match this view yet.
The library only displays reviewed rows marked public. Imported rows remain hidden until reviewed.
Locks in Missouri
4 reviewed public lock references are available for this Great Loop view.
Lock and Dam 20
Canton, MO • Upper Mississippi River
- VHF
- 13/14 verify
- Phone
- Verify current USACE district/CorpsLocks
Lock and Dam 22
Saverton, MO • Upper Mississippi River
- VHF
- 13/14 verify
- Phone
- Verify current USACE district/CorpsLocks
Lock and Dam 24
Clarksville, MO • Upper Mississippi River
- VHF
- 13/14 verify
- Phone
- Verify current USACE district/CorpsLocks
Lock and Dam 25
Winfield, MO • Upper Mississippi River
- VHF
- 13/14 verify
- Phone
- Verify current USACE district/CorpsLocks
Learn & Prepare
How to Lock Through
Approach slowly, prepare lines and fenders before arrival, monitor the published VHF channel when available, and follow lockmaster instructions.
VHF Call Scripts
Use the lock name, vessel name, direction of travel, and your request. Confirm current instructions before entering.
Lock Etiquette
Keep wake down near approaches, brief crew before entering, yield as directed, and avoid crowding other vessels.
Gear Checklist
Have fenders, lines, gloves, PFDs, boat hooks, and a working radio ready before reaching the approach.
Common Mistakes
Do not rely on old schedules, stale notes, or unofficial status reports. Check current notices and local lock instructions.
Navigation Safety Note
This page is a planning reference, not a substitute for official notices, charts, lockmaster instructions, or current local conditions. Always confirm lock status, operating hours, closures, restrictions, and instructions with the official authority before arrival.