The project will construct a new 1,200-foot drilled-shaft-founded lock at Lock 25 in the auxiliary miter gate bay, plus a 1,200-foot upstream ported guard wall and a 650-foot downstream guard wall. The existing 600-foot lock will remain in place and become an auxiliary chamber used mainly for recreation traffic or when the new lock is out of service. Full solicitation details are in the attachments, and the large plans/model files must be requested by email from the contract specialist and will be sent via DoD SAFE. Amendments 0001–0004 incorporate ProjNet bidder inquiries and government responses posted through 31 August, 15 September, 5 October, and 20 October 2026, with additional Q&A and updates expected in forthcoming amendments. A pre-proposal site visit update is referenced in the 0817 update.

The work at Lock 25 includes constructing a new 1,200-foot drilled-shaft-founded lock in the auxiliary miter gate bay, a 1,200-foot upstream ported guard wall, and a 650-foot downstream guard wall, while retaining the existing 600-foot lock as an auxiliary chamber used primarily for recreation traffic or when the new lock is out of service. Full requirement details are in the attachments, and the plan volumes and Navisworks federated model must be requested by email from Contract Specialist Whitney Dee at whitney.r.dee@usace.army.mil, then will be sent via DoD SAFE because the files are too large. Pre-proposal site visit details are provided in the update labeled 0817. Amendments incorporate ProjNet inquiries and government responses posted through 31 August 2026, 15 September 2026, 5 October 2026, and 20 October 2026, with additional Q&A and updates expected in forthcoming amendments.

This requirement covers construction of a new 1,200-foot drilled shaft-founded lock in the auxiliary miter gate bay at Lock 25, plus a 1,200-foot upstream ported guard wall and a 650-foot downstream guard wall. The existing 600-foot lock will remain in place and become an auxiliary lock chamber primarily for recreation traffic or when the new lock is out of service. Full details are in the attachments, and the large plans and Navisworks federated model must be requested by email and will be provided via DoD SAFE. An update labeled 0817 contains full details for the upcoming pre-proposal site visit. Amendments 0001 through 0003 incorporate ProjNet bidder inquiries and government responses posted through 31 August 2026, 15 September 2026, and 5 October 2026, respectively, with additional Q&A and updates to follow.

This contract will construct a new 1,200-foot drilled shaft-founded lock in the auxiliary miter gate bay at Lock 25, plus a 1,200-foot upstream ported guard wall and a 650-foot downstream guard wall. The existing 600-foot lock will remain and, once the new lock is operational, become an auxiliary chamber used primarily by recreation traffic or when the 1,200-foot lock is out of service. Plans and the Navisworks Federated Model must be requested by email from Contract Specialist Whitney Dee and will be sent via DoD SAFE because of file size. A pre-proposal site visit is detailed in Update 0817. Amendments 0001 and 0002 include ProjNet bidder inquiry responses and Government updates posted through 31 August 2026 and 15 September 2026, respectively, with additional Q&A and updates expected in forthcoming amendments.

A new 1,200-foot drilled shaft-founded lock will be constructed downstream at Lock 25 in the auxiliary miter gate bay, along with a 1,200-foot upstream ported guard wall and a 650-foot downstream guard wall. The existing 600-foot lock will remain operational and become an auxiliary chamber primarily for recreation traffic or as backup. Full details, including plans and a Navisworks model, must be requested via email from the Contract Specialist. Amendment 0001 and forthcoming updates incorporate ProjNet bidder inquiries and government responses through late August 2026. A pre-proposal site visit is addressed in an update labeled 0817.

This contract covers construction of a new 1,200-foot drilled shaft-founded lock at Lock 25 in the auxiliary miter gate bay (Location 3), plus a 1,200-foot upstream ported guard wall and a 650-foot downstream guard wall. The existing 600-foot lock will be kept and converted into an auxiliary chamber for recreational traffic or backup use. Full details are provided in attached plans and a Navisworks model, which must be requested by email from the contract specialist. An upcoming pre-proposal site visit is described in a separate update. The work will be performed at Lock 25.

W912P926RA004 - NESP LD25 1200 ft Lock --------- The U.S. Army Corps of Engineers (USACE), St. Louis District, has an upcoming solicitation for constructing a new 1,200 ft Lock for Lock and Dam 25. Lo... W912P926RA004 - NESP LD25 1200 ft Lock --------- The U.S. Army Corps of Engineers (USACE), St. Louis District, has an upcoming solicitation for constructing a new 1,200 ft Lock for Lock and Dam 25. Lock and Dam 25 is located approximately 61.5 river miles upstream from St. Louis and 241.5 miles above the mouth of the Ohio River. SEE ATTACHMENT FOR FULL DETAILS OF UPCOMING REQUIREMENT SOLICITATION.

The U.S. Army Corps of Engineers is seeking construction of a new 1,200-foot drilled shaft-founded lock at Lock 25, built downstream in the auxiliary miter gate bay. The project also includes a 1,200-foot upstream ported guard wall and a 650-foot downstream guard wall. The existing 600-foot lock will remain operational and serve as an auxiliary chamber for recreation or when the new lock is out of service. No specific budget amounts, submission timelines, or performance location beyond the lock site are mentioned. Full details, including plans and a Navisworks model, are available upon request from the Contract Specialist.

W912P926RA004 - NESP LD25 1200 ft Lock --------- The U.S. Army Corps of Engineers (USACE), St. Louis District, has an upcoming solicitation for constructing a new 1,200 ft Lock for Lock and Dam 25. Lo... W912P926RA004 - NESP LD25 1200 ft Lock --------- The U.S. Army Corps of Engineers (USACE), St. Louis District, has an upcoming solicitation for constructing a new 1,200 ft Lock for Lock and Dam 25. Lock and Dam 25 is located approximately 61.5 river miles upstream from St. Louis and 241.5 miles above the mouth of the Ohio River. SEE ATTACHMENT FOR FULL DETAILS OF UPCOMING REQUIREMENT SOLICITATION.

The Government is seeking industry feedback on whether Option 4 of the Lock and Dam 25 contract should use a fixed-price incentive successive targets (FPIS) structure instead of firm-fixed-price. The base and Options 1 through 3 are anticipated to remain firm-fixed-price. Responses will help assess competition, price reasonableness, risk allocation, and potential improvements to cost, schedule, and delivery outcomes. No specific budget amounts, performance location, or submission timelines are mentioned in this description. Feedback must be provided via email to the specified addresses with the subject line "CLIN STRUCTURE FEEDBACK."

W912P926RA004 - NESP LD25 1200 ft Lock --------- The U.S. Army Corps of Engineers (USACE), St. Louis District, has an upcoming solicitation for constructing a new 1,200 ft Lock for Lock and Dam 25. Lo... W912P926RA004 - NESP LD25 1200 ft Lock --------- The U.S. Army Corps of Engineers (USACE), St. Louis District, has an upcoming solicitation for constructing a new 1,200 ft Lock for Lock and Dam 25. Lock and Dam 25 is located approximately 61.5 river miles upstream from St. Louis and 241.5 miles above the mouth of the Ohio River. SEE ATTACHMENT FOR FULL DETAILS OF UPCOMING REQUIREMENT SOLICITATION.