Lock Closures at the Hiram M. Chittenden Locks

Information about current and upcoming lock closures can be found here, please check periodically as dates and times may be subject to change.

Large Chamber Projected Closures

November 3, 2025 - November 24, 2025

The Hiram M. Chittenden Locks will close the large lock chamber to conduct annual maintenance from 3 NOV 2025, 06:00 to reopen on 24 NOV 2025, 16:00. Marine traffic will be able to use the Auxiliary (small) Lock chamber for navigation, subject to vessel LOA - less than 110 feet, beam – 26 feet or less  and draft no greater than 14 feet.

November 2, 2026 - November 24, 2026

2026 Large Lock Annual Maintenance Closure

November 1, 2027 - November 23, 2027

2027 Large Lock Annual Maintenance Closure

October 30, 2028 - November 21, 2028

2028 Large Lock Annual Maintenance Closure

Small Chamber Projected Closures

March 1, 2026 - March 12, 2026

2026 Small Lock Annual Maintenance Closure

March 1, 2027 - March 15, 2027

2027 Small Lock Annual Maintenance Closure

March 6, 2028 - March 20, 2028

2028 Small Lock Annual Maintenance Closure

Lock Chamber Information

The Large Locks can be operated as three (3)  different chamber configurations. 

Full Chamber includes both the East and West Chambers.

760 feet  Available Length

80 feet  Available Width

East Chamber

385 feet   Available Length

80 feet   Available Width

West Chamber

327 feet Available Length

80 feet  Available Width

The Small Locks is a single lock chamber:

123 feet   Available Length

28 feet Available Width