Great Loop Lock Reference

Lock and Dam 24

Reviewed planning reference for lock approach, communications, and float-plan preparation.

Upper Mississippi River

Lock and Dam 24

Clarksville, MO

Latitude / Longitude39.367000
-90.917000

PhoneVerify current USACE district/CorpsLocks

VHF Channel13/14 verify

Operating AuthorityNot listed

Last ReviewedNot listed

Lock Location

Zoomed-in location for this Great Loop lock reference.

About This Lock

Segment: Upper Mississippi River. Route status: all-possible extended Mississippi side route / start-end option. Coordinates are approximate station locations; verify phone/VHF through Corps Locks or current district notices. Rock Island District source identifies Mississippi lock-and-dam sites and river-mile data for many of these locks. Source: https://www.mvr.usace.army.mil/Missions/Navigation/Lock-and-Dam-Information/

Before You Arrive

Fenders ready
Lines ready
Crew briefed
PFDs on deck
Radio on correct channel
Call / monitor lock
Check current notices

Plan With FPW

Add lock planning context to your route and account for lock delays in your float plan.

Plan a Float Plan

Official Source

Official source

Open official source

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.