Solicitation

Lock and Dam 25 New 1,200 FT Lock Navigation and Ecosystem Sustainability Program (NESP)

Department of Defense · Department of the Army

AI summaryThe U.S. Army Corps of Engineers (St. Louis district office) is soliciting construction of a new 1,200-foot drilled shaft-founded lock at Lock and Dam 25 under the Navigation and Ecosystem Sustainability Program (NESP). The work includes a 1,200-foot upstream ported guard wall and a 650-foot downstream guard wall. The response due date is November 16, 2026, 10:00 AM Central (an amendment moved it to Dec 9, 2026, 10:00 AM CST · 11:00 AM Eastern), and the main documents are in attachments. More in the summary

A newer version of this notice was posted Oct 21, 2026. It moves the due date from Nov 16, 2026 to Dec 9, 2026, which is the date shown on this page. See the latest version.

AI summary Beta

Written by AI from the notice text. Check dates on SAM.gov.

Summary of the version posted Oct 20, 2026. The notice was amended Oct 21, 2026. The due date moved from Nov 16, 2026 to Dec 9, 2026. Check what else changed on SAM.gov. Some details are in the notice's attachments, which this summary didn't read. Check the attachments on SAM.gov.

The U.S. Army Corps of Engineers (St. Louis district office) is soliciting construction of a new 1,200-foot drilled shaft-founded lock at Lock and Dam 25 under the Navigation and Ecosystem Sustainability Program (NESP). The work includes a 1,200-foot upstream ported guard wall and a 650-foot downstream guard wall. The response due date is November 16, 2026, 10:00 AM Central, and the main documents are in attachments.

How to submit: due November 16, 2026, 10:00 AM Central. What to include is under Full summary below. Check the solicitation's instructions on SAM.gov.

Things to watch (4)

Worth checking: Pre-proposal site visit. The notice points to an update labeled 0817 for the pre-proposal site visit. Whether the visit is required is not in the text.
Worth checking: Plans must be requested by email. The plans and the 3D model are too large to attach, so a bidder has to ask for them before pricing the job.
Worth checking: Four amendments so far, more may follow. Amendments 0001 to 0004 answer bidder questions, and the notice says more answers and updates will come in later amendments.

Show all 4Show fewer

Minor: Large heavy civil project. A lock built on drilled shafts with guard walls is major river construction; expect high bonding and experience requirements, which the visible text does not list.

Read from the notice text only.

Full summary

What they want

Build a new 1,200-foot drilled shaft-founded lock in the auxiliary miter gate bay, downstream of the existing lock
Build a 1,200-foot upstream ported guard wall
Build a 650-foot downstream guard wall
Leave the existing 600-foot lock in place as an auxiliary chamber

Place of performance: MO (per SAM.gov)
Estimated value: Not stated
Offers due: November 16, 2026, 10:00 AM Central (from the version posted Oct 20, 2026; amended since)

What to include when you submit

Request Attachment 0004 Plans (Volume 1-7) and Attachment 0005 Navisworks Federated Model by email to Contract Specialist Whitney Dee at whitney.r.dee@usace.army.mil; they are sent through DoD SAFE

Not in the notice text

The full requirements are in attachments that were not read: the solicitation, amendments, Q&A responses and the update labeled 0817.
Whether the site visit is required, and its date, are not stated in the text.
Which wage rule applies (a Davis-Bacon wage determination) is not stated.
The contract type, period of performance, value, bonding and evaluation basis are not stated.
SAM.gov shows no set-aside.
The Q&A on bidder inquiries is posted on ProjNet and in the amendments.

Eligibility and how to respond

No set-aside: any business, large or small, can bid unless the notice says otherwise.
How and where to submit is in the notice text and its attachments on SAM.gov.
Construction contracts over $2,000 pay at least the local Davis-Bacon wage rates, from the wage determination in the solicitation. Price your labor from it: How to price a government contract, and how Davis-Bacon differs from the Service Contract Act.

Notice details

Posted: Oct 20, 2026
Notice type: Solicitation
Office: W07V ENDIST St Louis, Saint Louis, MO
Product/service code: Y1PZ · Construction of Other Non-Building Facilities
Business type: Construction & renovation (FedReady's grouping, from NAICS 237990)
Versions: 14 versions have been posted, newest first.
Oct 21, 2026 · AmendmentDue Dec 9, 2026 (changed)
Oct 20, 2026 · Amendment 0004 (this version)Due Nov 16, 2026
Oct 6, 2026 · AmendmentDue Nov 16, 2026
Sep 16, 2026 · AmendmentDue Nov 16, 2026
Sep 2, 2026 · AmendmentDue Nov 16, 2026
Aug 17, 2026 · AmendmentDue Nov 16, 2026
Jul 14, 2026 · SolicitationDue Nov 16, 2026 (changed)
Jul 14, 2026 · AmendmentDate Jul 14, 2026 (changed)
Jun 2, 2026 · PresolicitationDate Jul 15, 2026 (changed)
May 8, 2026 · Sources SoughtDue May 15, 2026 (changed)
May 4, 2026 · AmendmentDate Jun 12, 2026
May 4, 2026 · PresolicitationDate Jun 12, 2026 (changed)
Apr 2, 2026 · AmendmentDate May 1, 2026
Mar 31, 2026 · Special NoticeDate May 1, 2026
Attachments: Checking SAM.gov for this notice's files…
See attachments on SAM.gov

Past awards and competition

Who has won work like this before, the likely incumbent, and what similar contracts paid, from USAspending.gov.

Before you respond

Terms on this notice: Solicitation

Full notice text from SAM.gov

NESP LD25 1200 ft Lock --------- The new lock at Lock 25 will be constructed in the downstream direction in the auxiliary miter gate bay, which has minimum provisions for an adjacent 360-foot-long lock and is referred to as Location 3 in the System Feasibility Study (September 2004). This contract will consist of construction of 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. The existing 600-foot lock will remain in place and once the new lock is constructed and operational, will become an auxiliary lock chamber used primarily by recreation traffic or when the 1,200 ft lock is out of service. ------------ SEE ATTACHMENT FOR FULL DETAILS OF UPCOMING REQUIREMENT SOLICITATION. --------- Attachment 0004 Plans (Volume 1-7) and Attachment 0005 Navisworks Federated Model must be requested via email to Contract Specialist, Whitney Dee at whitney.r.dee@usace.army.mil. Upon request they will be sent via DoD SAFE, since the files are too large to attach within PIEE or send via email. ------ SEE UPDATE LABELED 0817 FOR FULL DETAILS OF UPCOMING PRE-PROPOSAL SITE VISIT. -------------------- AMENDMENT 0001 provides updates in accordance with some of the ProjNet Bidder Inquiries and Government Responses posted through 31 August 2026. Additional questions and answers and updates will be provided in forthcoming amendments. See all attachments for full details.-------------------- AMENDMENT 0002 provides updates in accordance with some of the ProjNet Bidder Inquiries and Government Responses posted through 15 September 2026. Additional questions and answers and updates will be provided in forthcoming amendments. See all attachments for full details.-------------------- AMENDMENT 0003 provides updates in accordance with some of the ProjNet Bidder Inquiries and Government Responses posted through 5 October 2026. Additional questions and answers and updates will be provided in forthcoming amendments. See all attachments for full details.-------------------- AMENDMENT 0004 provides updates in accordance with some of the ProjNet Bidder Inquiries and Government Responses posted through 20 October 2026. Additional questions and answers and updates will be provided in forthcoming amendments. See all attachments for full details.

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