NAICS 237990: Other Heavy and Civil Engineering Construction
This industry comprises establishments primarily engaged in heavy and civil engineering construction projects (excluding highway, street, bridge, and distribution line construction). The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to heavy and civil engineering construction projects (excluding highway, street, bridge, distribution line, oil and gas structure, and utilities building and structure construction). Construction projects involving water resources (e.g., dredging and land drainage), development of marine facilities, and projects involving open space improvement (e.g., parks and trails) are included in this industry.
$45M receiptsSBA size standard
23open contracts now
285posted in the last 12 months
2379Other Heavy and Civil Engineering Construction
This industry comprises establishments primarily engaged in heavy and civil engineering construction projects (excluding highway, street, bridge, and distribution line construction). The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to heavy and civil engineering construction projects (excluding highway, street, bridge, distribution line, oil and gas structure, and utilities building and structure construction). Construction projects involving water resources (e.g., dredging and land drainage), development of marine facilities, and projects involving open space improvement (e.g., parks and trails) are included in this industry.
Examples of work in this code:
Channel construction
Land drainage contractors
Dam construction
Marine construction
Dock construction
Microtunneling contractors
Dredging (e.g., canal, channel, ditch, waterway)
Nuclear waste disposal site construction
Earth retention system construction
Flood control project construction
Park ground and recreational open space improvement construction
Establishments primarily engaged in constructing water mains, sewers, and related structures are classified in Industry 237110, Water and Sewer Line and Related Structures Construction.
Establishments primarily engaged in constructing oil and gas pipelines and related structures are classified in Industry 237120, Oil and Gas Pipeline and Related Structures Construction.
Establishments primarily engaged in constructing power and communication transmission lines and related structures are classified in Industry 237130, Power and Communication Line and Related Structures Construction.
Establishments primarily engaged in installing and maintaining electric power lines and towers performed by electric utility companies are classified in Industry Group 2211, Electric Power Generation, Transmission and Distribution.
Establishments primarily engaged in installing and maintaining communication transmission lines and towers performed by telecommunications companies are classified in Subsector 517, Telecommunications.
Establishments primarily engaged in constructing highways, streets, and bridges are classified in Industry 237310, Highway, Street, and Bridge Construction.
Establishments primarily engaged in trenching (except underwater) or removing dams, dikes, and other heavy and civil engineering constructions are classified in Industry 238910, Site Preparation Contractors.
Establishments primarily engaged in inspecting pipelines (i.e., visual) are classified in Industry 541990, All Other Professional, Scientific, and Technical Services.
SBA size standard
A business is small under NAICS 237990 if it has no more than $45 million in average annual receipts (averaged over the last five completed fiscal years, including affiliates).
Exceptions:
Dredging and Surface Cleanup Activities: $37 million in average annual receipts
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Source: SBA Table of Size Standards, effective 2023-03-17. Always check the size standard printed in the solicitation itself.
Who buys it
Departments that posted the most NAICS 237990 solicitations in the last two years:
GIWW Freeport to Matagorda Maintenance Dredging · Department of Defense · posted September 25, 2026
NAICS 237990 PSC Y1PZ--CONS: 909CM3030 Fort Custer NC - Cemetery Expansion and Site Improvements (VA-26-00046764) · Veterans Affairs · Michigan · posted September 25, 2026
Atlantic Intracoastal Waterway Maintenance Dredging · Department of Defense · North Carolina · posted September 24, 2026
Corning and Holt 10 Levee Repairs · Department of Defense · posted September 24, 2026
Atchafalaya River Bay, Bar, and Crewboat Cut Cutterhead Dredge No. 4-2024, St. Mary Parish, Louisiana. Specification No. OM24062. · Department of Defense · Louisiana · posted September 24, 2026
Do this kind of work?
Send XL Eagle your price on an open other heavy and civil engineering construction job. We write and submit the bid under our registrations. If we win, you do the work at your price. No fees.
NAICS 237990 is Other Heavy and Civil Engineering Construction. This industry comprises establishments primarily engaged in heavy and civil engineering construction projects (excluding highway, street, bridge, and distribution line construction). The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to heavy and civil engineering construction projects (excluding highway, street, bridge, distribution line, oil and gas structure, and utilities building and structure construction). Construction projects involving water resources (e.g., dredging and land drainage), development of marine facilities, and projects involving open space improvement (e.g., parks and trails) are included in this industry.
What is the SBA size standard for NAICS 237990?
The size standard for NAICS 237990 is $45 million in average annual receipts. Firms at or under it count as small businesses for contracts assigned this code.
Are there government contracts for other heavy and civil engineering construction?
Yes. 23 government contracts are open under NAICS 237990 right now, and 285 were posted in the last 12 months.
Can I bid on NAICS 237990 contracts without registering in SAM.gov?
You need an active SAM.gov registration to win a federal contract in your own name. If you would rather skip that, XL Eagle can bid as the prime contractor using your price, and you do the work as our subcontractor.
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