Other Heavy and Civil Engineering Construction
Size Standard: $45 million
NAICS code 237990 covers Other Heavy and Civil Engineering Construction not classified elsewhere, including construction of flood control projects, dams, levees, dredging, marine construction, and other heavy civil projects. This catch-all code covers significant infrastructure work.
Government agencies award substantial contracts under NAICS 237990. The U.S. Army Corps of Engineers is the primary buyer for flood control, navigation, and dam projects. The Bureau of Reclamation builds dams and water projects in the West. NAVFAC handles marine construction for Navy facilities. Environmental restoration and remediation projects also use this code.
Contractors under NAICS 237990 must have specialized expertise depending on the work type—dredging requires specialized vessels and permits, dam construction requires geotechnical expertise, marine construction requires pile-driving and waterfront experience. Environmental compliance is critical for most heavy civil work.
The $45 million size standard applies, though many heavy civil projects far exceed this. Specialized equipment and expertise create barriers to entry but also reduce competition. Small businesses can focus on specific niches like marine construction, environmental restoration, or smaller flood control projects.
- U.S. Army Corps of Engineers (USACE)
- Bureau of Reclamation
- Naval Facilities Engineering Command (NAVFAC)
- Federal Emergency Management Agency (FEMA)
- Environmental Protection Agency (EPA)
- Flood Control Construction
- Dam Construction and Repair
- Dredging Projects
- Levee Construction
- Marine and Waterfront Construction
These certifications can help you compete for set-aside contracts under NAICS 237990:
What projects use NAICS code 237990?
NAICS 237990 is a catch-all for heavy civil construction including flood control, dams, levees, dredging, marine construction, seawalls, breakwaters, and other heavy civil engineering work not classified elsewhere.
What is the size standard for NAICS 237990?
The SBA size standard for NAICS 237990 is $45 million in average annual receipts. However, many heavy civil projects are much larger, so small businesses often enter through smaller projects or specialized niches.
Which agencies award the most NAICS 237990 contracts?
The U.S. Army Corps of Engineers is the largest buyer for flood control, navigation, and dam projects. Bureau of Reclamation handles western water projects. NAVFAC handles Navy marine construction.
What specialized equipment is needed for NAICS 237990?
Depending on the work, contractors may need dredges, barges, pile drivers, marine cranes, heavy earthmoving equipment, or specialized dam construction equipment. Equipment requirements create barriers to entry.
How do environmental requirements affect NAICS 237990 projects?
Heavy civil construction typically requires extensive NEPA compliance, wetland permits, endangered species consultation, water quality permits, and environmental monitoring. Environmental expertise is essential.
Businesses below this threshold in average annual receipts qualify as small businesses for set-aside contracts.
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