Corps Advances Lock and Dam 25 Capacity Expansion
Construction of a new 1,200-foot chamber aims to improve long-term efficiency for commercial waterway operators.
Updated on Oct. 30, 2026 in Construction
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The U.S. Army Corps of Engineers is advancing construction on the Lock and Dam 25 project, doubling the length of the existing lock chamber to 1,200 feet. This infrastructure upgrade aims to improve efficiency and safety for commercial navigation.
Why it matters
The project addresses critical capacity constraints by replacing an existing 600-foot lock chamber with a larger, more modern facility. For contractors and operators, this signals long-term efforts to modernize commercial waterway logistics.
The project has reached $100 million in construction work through advanced contracts, which include 2,000 completed design drawings. Crews are currently fabricating 21 lock bulkheads, with 17 already finished, to support the new 1,200-foot chamber.
The players
U.S. Army Corps of Engineers
The federal agency responsible for planning, designing, and maintaining the nation's critical waterway infrastructure.
J.F. Brennan Company
A marine construction firm specializing in heavy civil infrastructure and foundation projects for maritime sites.
G&G Steel
A steel fabrication company currently supplying heavy components for the Lock and Dam 25 project.
The details
The Army Corps is using advanced contracts for long-lead items, such as the 21 bulkheads being fabricated in Alabama, to compress the main lock project schedule. On-site, J.F. Brennan Company is managing site preparation, including the installation of 10 drilled shafts for the guide cell foundation. To maintain site flow, staff coordinate work between multiple contractors to manage limited space near the existing structure.
Timeline
June 2026: Design completion and advanced contract award.
July 2026: Request for proposals for main construction contract issued.
January 2027: Expected bulkhead delivery and downstream guide cell completion.
Market Landscape
The project follows the prioritized infrastructure delivery models set forth in the Water Resources Development Act. This expansion marks a shift toward larger 1,200-foot locks designed to handle increased commercial transit volume.
Operators in the maritime logistics and construction sectors should monitor the procurement schedule for the main lock contract. The use of advanced contracts to mitigate supply chain delays offers a template for managing large-scale, long-lead infrastructure projects.
The takeaway
The move to 1,200-foot lock chambers signals a long-term industry commitment to increasing capacity through more efficient physical infrastructure. Monitor the bidding process for the main lock contract as a signal for future project management timelines.
Further reading
For broader trends in infrastructure, see the latest updates in Construction.
Source note: This article includes information reported by The Waterways Journal.
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