This Subcontract opportunity from Department Of Defense was posted on May 18, 2026. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

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Maintenance Dredging Services (Mechanical & Hydraulic)

Closed

Federal

Submission Closed06/17/2026, 11:30:00 AM PDT

Contract Overview

Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.

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NAICS: 237300

SLED

Civil Site Work and GradingThe contract entails comprehensive civil site work for a 38-acre residential development in Santa Clara, California, focusing on earthwork, grading, drainage, and erosion control measures to prepare the site for residential construction. The work is governed under NAICS code 237300, which classifies it as heavy and civil engineering construction, and it is structured as a subcontract under the jurisdiction of the City of Santa Clara. The project's place of performance is firmly located within the 95054 zip code, ensuring all activities align with local infrastructure and environmental standards. Although the solicitation number and point of contact are not provided, the contract was posted on July 13, 2026, indicating the timeframe for bidding or award is imminent. The scope requires strict adherence to regulatory requirements for land disturbance and stormwater management to mitigate environmental impact during and after construction, with all work tied to the city’s planning and development objectives as referenced through the provided project link.

POSTED

DEADLINE

Upland and Habitat EarthworkThe contract involves the excavation and grading of upland areas amounting to 150,000 cubic yards with a focus on shaping native habitats for marsh, bench, and riparian zones to support ecological restoration. The work is part of a broader waterfront restoration initiative managed by the Port of Seattle under the Waterfront Project Management office, with the contract classified as a subcontract and aligned with NAICS code 237300 for heavy and civil engineering construction. The project scope requires precise earthmoving techniques to recreate natural topography while ensuring compliance with environmental standards for sensitive coastal ecosystems. The solicitation was posted on July 1, 2026, and detailed performance criteria are available via the Port of Seattle’s official portal.

Waterfront Project Management

POSTED

DEADLINE

Sand Dredging and Disposal ServicesThe contract involves dredging and transporting approximately 850,000 cubic yards of sand from the harbor channel, utilizing dredges and scows to move the material to designated disposal sites. The work is classified under NAICS code 237300 and is structured as a subcontract under the Department of Defense, specifically managed by W2SD Endist New England. The primary place of performance is in New Haven, though the exact state and postal details are not specified. The solicitation was posted on April 30, 2026, and while no set-aside type is indicated, the project is intended for specialized marine construction and dredging services. All work must comply with environmental and operational standards applicable to harbor dredging activities, and the contractor is responsible for the safe and efficient execution of material removal and disposal.

W2SD Endist New England

POSTED

DEADLINE

Optional Dredging – Dredge Area 14This contract involves the optional dredging of up to 16,700 cubic yards in Dredge Area 14. The work requires the use of appropriate dredging equipment and access to authorized disposal sites for the dredged material. The contract is issued as a subcontract by the Department of Defense, specifically under the "W072 Endist Detroit" agency. It falls under the NAICS code 237300, which covers heavy and civil engineering construction services. The contract was posted on March 25, 2026, and although details such as solicitation number, specific location, and point of contact are not provided, the scope emphasizes environmental and operational capabilities related to sediment removal in designated areas. The subcontract likely supports broader defense infrastructure maintenance or environmental management projects requiring specialized dredging efforts.

POSTED

DEADLINE

Optional Dredging – Dredge Area 3 (Option 2)The contract involves a second optional phase of dredging in a specified area known as Dredge Area 3, with a maximum volume of up to 25,600 cubic yards, contingent upon the exercise of this option. This work falls under the subcontract category and is associated with NAICS code 237300, which pertains to heavy and civil engineering construction. The contract is managed by the Department of Defense, specifically the W072 Endist Detroit agency. Posted on March 25, 2026, the contract focuses on environmental and infrastructure maintenance through dredging operations. Although specific location details and points of contact are not provided, this subcontract represents a continuation or extension of previous dredging activities in the designated area. The successful fulfillment of the contract will likely involve specialized excavation and material removal to maintain or improve navigational or operational conditions within the project site.

POSTED

DEADLINE

Optional Dredging – Dredge Area 3 (Option 1)This contract involves an optional dredging project for Dredge Area 3, allowing for the removal of up to 10,600 additional cubic yards of material if the option is exercised. The scope of work will follow the same methods and procedures used in the initial base dredging effort, ensuring consistency in operations. The contract falls under subcontracting within the NAICS code 237300, which pertains to heavy and civil engineering construction. Issued by the Department of Defense office W072 Endist Detroit, the contract was posted on March 25, 2026. While specific details such as the solicitation number, place of performance, and contact information are not provided, the contract's focus is clearly on extending dredging activities in a designated area to support ongoing or future project requirements. The availability of the optional work allows for flexibility to address additional dredging needs without initiating a separate contract.

POSTED

DEADLINE

Mechanical Dredging – Dredge Area 17The contract involves the mechanical dredging of 7,400 cubic yards of material from Dredge Area 17, a task expected to be carried out under challenging conditions that may include the presence of rock or limited site accessibility. This subcontract is associated with the Department of Defense, specifically the W072 Endist Detroit office, and falls under the NAICS code 237300, which pertains to heavy and civil engineering construction activities. The scope of work requires specialized equipment and expertise to handle potential obstacles in the dredging area, ensuring the removal of sediment or debris to meet operational or environmental requirements. While specific location details and points of contact are not provided, the contract emphasizes the complexity of the undertaking, highlighting the need for contractors capable of managing difficult site conditions efficiently and safely.

POSTED

DEADLINE

Mechanical Dredging – Dredge Area 11The contract involves the mechanical dredging and removal of approximately 17,800 cubic yards of material from Dredge Area 11. This operation requires specialized deep dredging equipment and precise depth control to ensure accurate excavation. The scope highlights the need for careful handling to meet the technical demands of the site. Issued by the Department of Defense under the W072 Endist Detroit office, the subcontract falls within the NAICS code 237300, which covers heavy and civil engineering construction. While specific location details and points of contact are not provided, the contract was posted on March 25, 2026, and is accessible through the federal contracting portal, indicating that it is a formal procurement opportunity targeting specialized dredging services.

POSTED

DEADLINE

Mechanical Dredging – Dredge Area 6The contract involves the mechanical dredging of 14,600 cubic yards from a specified location known as Dredge Area 6. The scope includes not only the physical removal of material using mechanical methods but also encompasses site monitoring to ensure environmental and operational standards are maintained throughout the project. Additionally, compliance with disposal regulations for the dredged material is a critical aspect of the contract. This subcontract is issued by the Department of Defense through the W072 Endist Detroit agency and falls under the NAICS code 237300, which pertains to heavy and civil engineering construction. While details such as the solicitation number and exact place of performance are not specified, the contract was posted on March 25, 2026. The project emphasizes adherence to regulatory requirements and environmental safeguards, reflecting the importance of responsible dredging practices.

POSTED

DEADLINE

Mechanical Dredging – Dredge Area 3 (Base)The contract involves the mechanical dredging of 41,600 cubic yards of sediment from Dredge Area 3. This work includes the use of mechanical dredging methods to excavate the sediment, followed by pumping and transporting the material to a designated disposal site. The project aims to efficiently remove accumulated sediment to maintain navigable waterways or support environmental management objectives. Issued by the Department of Defense under the office W072 Endist Detroit, this subcontract falls under the NAICS code 237300, which covers heavy and civil engineering construction. Although specific location details and points of contact are not provided, the contract was posted on March 25, 2026, reflecting a planned effort in sediment management using established mechanical dredging techniques.

POSTED

DEADLINE

Sand Stockpiling ServicesThis subcontract for Sand Stockpiling Services, issued by the Department of Defense through the W2SD Endist Baltimore, involves the dredging, marine transport, and stockpiling of sand. The primary objective of these operations is to secure sand at designated project locations for future utilization in shoreline protection efforts. The project is categorized under NAICS code 237300 and is scheduled for performance in the 21634 zip code area. This effort focuses on critical marine infrastructure and environmental preservation through strategic material management.

W2SD Endist Baltimore

POSTED

DEADLINE

Ninilchik Harbor Mobilization and Dredging SupportThe contract involves mobilization, dredging, and demobilization services at Ninilchik Harbor, with work slated to begin in 2027. This subcontract falls under the NAICS code 237300, which covers heavy and civil engineering construction, indicating that the services are focused on significant harbor infrastructure work. The contract is managed by the Department of Defense through its W2SN Endist Alaska office, highlighting the strategic importance of the harbor's maintenance and readiness. Work will be performed in the area corresponding to the 99603 ZIP code, suggesting a specific geographic focus around Ninilchik Harbor in Alaska. While the solicitation number and point of contact are not provided, the contract includes option years, allowing for potential extension beyond the initial period based on project needs. Overall, this contract is a key component in maintaining the operational capacity and safety of the harbor through specialized dredging and mobilization support activities.

W2SN Endist Alaska

POSTED

9 months ago

DEADLINE

N/A

AI Contract Overview

This contract involves providing annual maintenance dredging services for the Suisun Bay Channel, NY Slough, and Bulls Head Channel, ensuring these waterways are dredged to specified depths with an allowance for overdepth. The project encompasses the full scope of mobilization, mechanical and hydraulic dredging operations, and mandates adherence to environmental regulations and navigational safety standards throughout the process. The work is aimed at maintaining channel depth to facilitate safe and efficient navigation. The solicitation is designated as a total small business set-aside under the SBA, compliant with FAR 19.5, and is classified under NAICS code 237300, which pertains to dredging services. Issued by the Department of Defense, specifically the W075 Endist San Francisco office, the contract response deadline is June 17, 2026. While precise location details for the work and point of contact information are not specified, the government agency overseeing the contract is responsible for ensuring proper execution consistent with regulatory and contractual requirements.

General Info

Annual maintenance dredging for Suisun Bay, NY Slough, Bulls Head Channels; SBA small business set-aside.

Agency

Department Of Defense → W075 Endist San Fran

NAICS

237300

Place of Performance

Set-Aside

SBA

Documents

This scope was carved out of W912P726BA003.

The full solicitation package (7 documents), including the RFP, is on the prime solicitation, not on this scope.

View the prime solicitation

SUISUN BAY CHANNEL AND NY SOLUGH FY26 MAINTENANCE DREDGING PROJECT

AI Contract Breakdown

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Timeline

PhaseClosed

PostedMay 18

subcontract

Response DeadlineJun 17

Deadline has passed

Submission Closed

06/17/2026, 11:30:00 AM PDT

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Organization & Contact Information

AgencyDepartment Of Defense → W075 Endist San Fran

ContactsNo contacts available

OfficeN/A

Organization / AgencyDepartment Of Defense → W075 Endist San Fran

Office AddressN/A

ContactsNo contact information available

Full Description

Perform annual maintenance dredging of Suisun Bay Channel, NY Slough, and Bulls Head Channel to specified depths with overdepth allowance. Includes mobilization, dredging operations, and compliance with environmental and navigational safety standards.