Great Loop Lock Reference
Reviewed planning reference for lock approach, communications, and float-plan preparation.
Upper Mississippi River
Alton, IL
Zoomed-in location for this Great Loop lock reference.
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Segment: Upper Mississippi River. Route status: core inland-river route. Approximate coordinate. USACE St. Louis District operates this major Upper Mississippi lock facility; VHF/phone should be verified in current navigation notices. Source: https://www.mvs.usace.army.mil/Missions/Navigation/Locks-and-Dams/Melvin-Price/
Continue planning: Check Marine Weather, estimate your trip with the Boat Fuel Calculator, or review the Solo Boating Safety Guide.
