# Lake Washington Ship Canal Emergency Closure System Canonical: https://abierto.us/opportunities/w912dw25r0018 - Solicitation number: W912DW25R0018 - Notice type: Award notice (first published as sources sought) - Status: Awarded to Redside Construction LLC for $4,457,500.00 - Department: Department of the Army - Agency: Department of the Army - Contracting office: W071 Endist Seattle (W912DW) - NAICS: 237990 Other Heavy and Civil Engineering Construction - Product or service code: Y1PZ Construction Of Other Non-Building Facilities - Place of performance: Seattle, Washington - County: King County (FIPS 53033). https://abierto.us/counties/king-county-wa-53033 - City: Seattle. https://abierto.us/cities/seattle-wa-5363000 - First posted: December 5, 2024 - Last posted: September 24, 2025 - SAM.gov: https://sam.gov/workspace/contract/opp/7d0a23c1ce504f518662432c85db4ddd/view ## Description July 22, 2025- Amendment R0005-The following action was taking on July 22, 2025. The due date for the receipt of proposals is NOT extended. Quotes are due 23 July 2025 at 10:00 AM Pacific Time. Please see the attached Amendment W912DW25R0018R0005. Offerors must acknowledge receipt of this amendment by number and date on offer. The purpose of this project is to install a new emergency closure system at the Hiram M. Chittenden Locks, Lake Washington Ship Canal, Seattle, WA. An emergency closure structure is any device designed to be placed in rapidly flowing water under differential head to prevent the loss of pool if the lock miter gates are damaged and can no longer function to control the pool. An emergency closure system consists of a closure structure and all the associated equipment necessary to install the closure structure in flowing water. July 17, 2025- Amendment R0004-The following action was taking on July 17, 2025. The due date for the receipt of proposals is NOT extended. Quotes are due 23 July 2025 at 10:00 AM Pacific Time. Please see the attached Amendment W912DW25R0018R0004. Offerors must acknowledge receipt of this amendment by number and date on offer. The purpose of this project is to install a new emergency closure system at the Hiram M. Chittenden Locks, Lake Washington Ship Canal, Seattle, WA. An emergency closure structure is any device designed to be placed in rapidly flowing water under differential head to prevent the loss of pool if the lock miter gates are damaged and can no longer function to control the pool. An emergency closure system consists of a closure structure and all the associated equipment necessary to install the closure structure in flowing water. July 15, 2025- Amendment R0003-The following action was taking on July 15, 2025. The due date for the receipt of proposals is NOT extended. Quotes are due 23 July 2025 at 10:00 AM Pacific Time. Please see the attached Amendment W912DW25R0018R0003. Offerors must acknowledge receipt of this amendment by number and date on offer. The purpose of this project is to install a new emergency closure system at the Hiram M. Chittenden Locks, Lake Washington Ship Canal, Seattle, WA. An emergency closure structure is any device designed to be placed in rapidly flowing water under differential head to prevent the loss of pool if the lock miter gates are damaged and can no longer function to control the pool. An emergency closure system consists of a closure structure and all the associated equipment necessary to install the closure structure in flowing water. July 11, 2025- Amendment R0002-The following action was taking on July 11, 2025. The due date for the receipt of proposals is NOT extended. Quotes are due 23 July 2025 at 10:00 AM Pacific Time. Please see the attached Amendment W912DW25R0018R0002. Offerors must acknowledge receipt of this amendment by number and date on offer. The purpose of this project is to install a new emergency closure system at the Hiram M. Chittenden Locks, Lake Washington Ship Canal, Seattle, WA. An emergency closure structure is any device designed to be placed in rapidly flowing water under differential head to prevent the loss of pool if the lock miter gates are damaged and can no longer function to control the pool. An emergency closure system consists of a closure structure and all the associated equipment necessary to install the closure structure in flowing water. June 24, 2025- Amendment R0001-The following action was taking on June 24, 2025. The due date for the receipt of proposals is extended. Quotes are due 23 July 2025 at 10:00 AM Pacific Time. Please see the attached Amendment W912DW25R0018R0001. Offerors must acknowledge receipt of this amendment by number and date on offer. No further actions were taken on this update. The purpose of this project is to install a new emergency closure system at the Hiram M. Chittenden Locks, Lake Washington Ship Canal, Seattle, WA. An emergency closure structure is any device designed to be placed in rapidly flowing water under differential head to prevent the loss of pool if the lock miter gates are damaged and can no longer function to control the pool. An emergency closure system consists of a closure structure and all the associated equipment necessary to install the closure structure in flowing water. ## Award on USAspending - Recipient: Redside Construction LLC (UEI NJ9LDESHCQG5) - Contract: W912DW25C0032, definitive contract - Obligated: $4,457,500.00 - Competition: Full and Open Competition, 4 offers received - Link: award number W912DW25C0032 equals the contract number; same awarding office W912DW (high confidence) - Record: https://www.usaspending.gov/award/CONT_AWD_W912DW25C0032_9700_-NONE-_-NONE-/ ## Publications - December 5, 2024: Sources sought, due January 3, 2025 at 12:00 AM EST. Notice 029bda0bcbe8492aa8363db13edca9cd. https://sam.gov/workspace/contract/opp/029bda0bcbe8492aa8363db13edca9cd/view - May 13, 2025: Presolicitation, due May 27, 2025 at 1:00 PM EDT. Notice 972731f289ab4c1280f00bdab897209c. https://sam.gov/workspace/contract/opp/972731f289ab4c1280f00bdab897209c/view - May 29, 2025: Solicitation, due July 7, 2025 at 1:00 PM EDT. Notice 39f260c0459d4211ae0928ec187e432f. https://sam.gov/workspace/contract/opp/39f260c0459d4211ae0928ec187e432f/view - June 25, 2025: Solicitation, due July 23, 2025 at 1:00 PM EDT. Notice 8e7e7b55f2e6407a8ad23621666a19f5. https://sam.gov/workspace/contract/opp/8e7e7b55f2e6407a8ad23621666a19f5/view - June 25, 2025: Solicitation, due July 23, 2025 at 1:00 PM EDT. Notice ed759d438e6443a6841da22404bd7e58. https://sam.gov/workspace/contract/opp/ed759d438e6443a6841da22404bd7e58/view - July 11, 2025: Solicitation, due July 23, 2025 at 1:00 PM EDT. Notice 18cb08945d3040738c049d56fffc6b4f. https://sam.gov/workspace/contract/opp/18cb08945d3040738c049d56fffc6b4f/view - July 15, 2025: Solicitation, due July 23, 2025 at 1:00 PM EDT. Notice 0c5d3e8fbc4445a5be4f6bf9289c494e. https://sam.gov/workspace/contract/opp/0c5d3e8fbc4445a5be4f6bf9289c494e/view - July 17, 2025: Solicitation, due July 23, 2025 at 1:00 PM EDT. Notice a661adfe6c454940a01df3cf813ffd84. https://sam.gov/workspace/contract/opp/a661adfe6c454940a01df3cf813ffd84/view - July 22, 2025: Solicitation, due July 23, 2025 at 1:00 PM EDT. Notice 34bd40619c084d06a8bb3629428df3d8. https://sam.gov/workspace/contract/opp/34bd40619c084d06a8bb3629428df3d8/view - September 24, 2025: Award notice. Notice 7d0a23c1ce504f518662432c85db4ddd. https://sam.gov/workspace/contract/opp/7d0a23c1ce504f518662432c85db4ddd/view ## Points of contact - McKenna Rain, mckenna.t.rain@usace.army.mil - Alex Marcinkiewicz, alex.r.marcinkiewicz@usace.army.mil --- Source: SAM.gov Contract Opportunities bulk extract and USAspending.gov award data. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/w912dw25r0018.