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Solicitation, first published as special notice

LOCK AND DAM 25 NEW 1,200 FT LOCK NAVIGATION AND ECOSYSTEM SUSTAINABILITY PROGRAM (NESP)

W912P926RA004

Department of the Army, W07V Endist ST Louis. Other Heavy and Civil Engineering Construction.

Add deadline to calendarView on SAM.gov Markdown

Offers due

December 9, 2026 at 11:00 AM EST

38 days from now. Posted October 21, 2026, first published March 31, 2026.

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Description

As published on 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.-------------------- AMENDMENT 0005 extends the proposal due date to 10:00AM CST, Wednesday, December 9, 2026. See all attachments for full details.

Attachments

Files listed on SAM.gov. The ones we hold a copy of download from here; the rest open SAM's download, which needs no account.

Publications

Every notice SAM.gov issued under this solicitation number, oldest first. Each is a separate record on SAM.

  1. March 31, 2026

    Special notice, originally sources sought

    DRAFT Solicitation for Feedback - LOCK AND DAM 25 NEW 1,200 FT LOCK NAVIGATION AND ECOSYSTEM SUSTAINABILITY PROGRAM (NESP)

    Due May 1, 2026 at 11:00 AM EDT. SAM.gov, notice 2667cc6866954810bad900da91e1f05e

    3 revisions on SAM
    • April 2, 2026: publish, special notice
    • March 31, 2026: publish, special notice
    • November 21, 2025: publish, sources sought

  2. April 2, 2026

    Special notice

    DRAFT Solicitation for Feedback - LOCK AND DAM 25 NEW 1,200 FT LOCK NAVIGATION AND ECOSYSTEM SUSTAINABILITY PROGRAM (NESP)

    Due May 1, 2026 at 11:00 AM EDT. SAM.gov, notice 8704375bd7c34f68bc74a8163a056658

    5 revisions on SAM
    • May 8, 2026: publish, sources sought
    • May 4, 2026: publish, presolicitation
    • April 2, 2026: publish, special notice
    • March 31, 2026: publish, special notice
    • November 21, 2025: publish, sources sought

  3. May 4, 2026

    Presolicitation, originally special notice

    DRAFT Solicitation for Feedback - LOCK AND DAM 25 NEW 1,200 FT LOCK NAVIGATION AND ECOSYSTEM SUSTAINABILITY PROGRAM (NESP)

    Due June 12, 2026 at 11:00 AM EDT. SAM.gov, notice 044c9f25a8bf4299a258e10cb0235065

    5 revisions on SAM
    • July 14, 2026: publish, presolicitation
    • June 2, 2026: publish, presolicitation
    • May 4, 2026: publish, presolicitation
    • May 4, 2026: publish, presolicitation
    • April 2, 2026: publish, special notice

  4. May 4, 2026

    Presolicitation

    Pre-Solicitation Synopsis - LOCK AND DAM 25 NEW 1,200 FT LOCK NAVIGATION AND ECOSYSTEM SUSTAINABILITY PROGRAM (NESP)

    Due June 12, 2026 at 11:00 AM EDT. SAM.gov, notice 254b83c224064b73a9d86369375ceec8

    5 revisions on SAM
    • July 14, 2026: publish, presolicitation
    • June 2, 2026: publish, presolicitation
    • May 4, 2026: publish, presolicitation
    • May 4, 2026: publish, presolicitation
    • April 2, 2026: publish, special notice

  5. May 8, 2026

    Sources sought, originally special notice

    CLIN STRUCTURE FOR PUBLIC FEEDBACK - LOCK AND DAM 25 NEW 1,200 FT LOCK NAVIGATION AND ECOSYSTEM SUSTAINABILITY PROGRAM (NESP)

    Due May 15, 2026 at 11:00 AM EDT. SAM.gov, notice 0167736617e24c459ab192894d419920

    2 revisions on SAM
    • May 8, 2026: publish, sources sought
    • April 2, 2026: publish, special notice

  6. June 2, 2026

    Presolicitation

    Pre-Solicitation Synopsis - LOCK AND DAM 25 NEW 1,200 FT LOCK NAVIGATION AND ECOSYSTEM SUSTAINABILITY PROGRAM (NESP)

    Due July 15, 2026 at 11:00 AM EDT. SAM.gov, notice a6dda172d3fa484191adbc5631fadf77

    5 revisions on SAM
    • July 14, 2026: publish, presolicitation
    • June 2, 2026: publish, presolicitation
    • May 4, 2026: publish, presolicitation
    • May 4, 2026: publish, presolicitation
    • April 2, 2026: publish, special notice

  7. July 14, 2026

    Presolicitation

    Pre-Solicitation Synopsis - LOCK AND DAM 25 NEW 1,200 FT LOCK NAVIGATION AND ECOSYSTEM SUSTAINABILITY PROGRAM (NESP)

    Due July 14, 2026 at 10:15 AM EDT. SAM.gov, notice 8e18158176c647cbafb2d722e6b68fe3

    6 revisions on SAM
    • July 14, 2026: publish, solicitation
    • July 14, 2026: publish, presolicitation
    • June 2, 2026: publish, presolicitation
    • May 4, 2026: publish, presolicitation
    • May 4, 2026: publish, presolicitation
    • April 2, 2026: publish, special notice

  8. July 14, 2026

    Solicitation, originally presolicitation

    Due November 16, 2026 at 11:00 AM EST. SAM.gov, notice 8f8193b0e9924e128abad534366aba7c

    5 revisions on SAM
    • September 16, 2026: publish, solicitation
    • September 2, 2026: publish, solicitation
    • August 17, 2026: publish, solicitation
    • July 14, 2026: publish, solicitation
    • July 14, 2026: publish, presolicitation

  9. August 17, 2026

    Solicitation

    Due November 16, 2026 at 11:00 AM EST. SAM.gov, notice e12f362fe2c6419fbf7c547626ac81fd

    5 revisions on SAM
    • September 16, 2026: publish, solicitation
    • September 2, 2026: publish, solicitation
    • August 17, 2026: publish, solicitation
    • July 14, 2026: publish, solicitation
    • July 14, 2026: publish, presolicitation

  10. September 2, 2026

    Solicitation

    Due November 16, 2026 at 11:00 AM EST. SAM.gov, notice ee65c92564ab49f2a49b169edf9955d5

    5 revisions on SAM
    • September 16, 2026: publish, solicitation
    • September 2, 2026: publish, solicitation
    • August 17, 2026: publish, solicitation
    • July 14, 2026: publish, solicitation
    • July 14, 2026: publish, presolicitation

  11. September 16, 2026

    Solicitation

    Due November 16, 2026 at 11:00 AM EST. SAM.gov, notice 639472fbc0854adcb20a5e78f7f2c1e1

    5 revisions on SAM
    • September 16, 2026: publish, solicitation
    • September 2, 2026: publish, solicitation
    • August 17, 2026: publish, solicitation
    • July 14, 2026: publish, solicitation
    • July 14, 2026: publish, presolicitation

  12. October 6, 2026

    Solicitation

    Due November 16, 2026 at 11:00 AM EST. SAM.gov, notice c35f894d02fd48a78421d36ec89b912e

    6 revisions on SAM
    • October 6, 2026: publish, solicitation
    • September 16, 2026: publish, solicitation
    • September 2, 2026: publish, solicitation
    • August 17, 2026: publish, solicitation
    • July 14, 2026: publish, solicitation
    • July 14, 2026: publish, presolicitation

  13. October 20, 2026

    Solicitation

    Due November 16, 2026 at 11:00 AM EST. SAM.gov, notice 2234f63f08e7439b97d1fd2f5c082f94

    7 revisions on SAM
    • October 20, 2026: publish, solicitation
    • October 6, 2026: publish, solicitation
    • September 16, 2026: publish, solicitation
    • September 2, 2026: publish, solicitation
    • August 17, 2026: publish, solicitation
    • July 14, 2026: publish, solicitation
    • July 14, 2026: publish, presolicitation

  14. October 21, 2026

    Solicitation

    Due December 9, 2026 at 11:00 AM EST. SAM.gov, notice e91745414d264b8ea97478fd67cf4982

    8 revisions on SAM
    • October 21, 2026: publish, solicitation
    • October 20, 2026: publish, solicitation
    • October 6, 2026: publish, solicitation
    • September 16, 2026: publish, solicitation
    • September 2, 2026: publish, solicitation
    • August 17, 2026: publish, solicitation
    • July 14, 2026: publish, solicitation
    • July 14, 2026: publish, presolicitation

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