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. Illustrative Examples: 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 Railroad construction Golf course construction Subway construction Horizontal drilling (e.g., cable, pipeline, sewer installation) Trenching, underwater Hydroelectric generating station construction Tunnel construction Cross-References. Establishments primarily engaged in--Show more
NAICS 237990 – Other Heavy and Civil Engineering Construction encompasses specialized infrastructure projects that fall outside standard building construction, including earthmoving, site preparation, drainage systems, erosion control, flood control structures, landfill construction, pipeline trenches, and non-residential site development. This sector supports critical public works such as access roads to federal facilities, utility relocation, dam repairs, and environmental remediation sites.
Industry Spending Overview
Federal obligations, top contractors and agencies, and related industry codes for NAICS 237990.
AI Industry Description
NAICS 237990 – Other Heavy and Civil Engineering Construction encompasses specialized infrastructure projects that fall outside standard building construction, including earthmoving, site preparation, drainage systems, erosion control, flood control structures, landfill construction, pipeline trench...
NAICS 237990 – Other Heavy and Civil Engineering Construction encompasses specialized infrastructure projects that fall outside standard building construction, including earthmoving, site preparation, drainage systems, erosion control, flood control structures, landfill construction, pipeline trenches, and non-residential site development. This sector supports critical public works such as access roads to federal facilities, utility relocation, dam repairs, and environmental remediation sites. It serves as a foundational enabler for larger federal construction programs, often requiring advanced geotechnical expertise, heavy equipment operations, and compliance with environmental regulations under NEPA and Clean Water Act standards. Contractors in this space typically deliver turnkey civil works under design-build or construction-manager-at-risk delivery models, integrating surveying, grading, and subsurface utility coordination. Top contractors in this sector include large primes such as AECOM Technical Services, Inc., and established mid-tier firms like Aspen Construction Company, Maverick Constructors, LLC, and RDA Contracting, Inc., alongside specialized small businesses including Istre Engineering Services, Inc. and ConsulTech Environmental LLC. The competitive landscape is fragmented, with a mix of regional general contractors and niche environmental or earthwork specialists competing for task orders under indefinite-delivery contracts. Primary buyers include the Department of Defense for military base infrastructure, the Department of the Interior for land management and conservation projects, the Department of Veterans Affairs for site upgrades at VA campuses, and the Department of Agriculture for rural infrastructure. The FPAC Bus Cntr-Acq Division also plays a key role in consolidating procurement across multiple agencies. The market is characterized by high project complexity and low entry barriers for small businesses with specialized equipment, creating opportunities for subcontracting and joint ventures. Demand is driven by aging infrastructure renewal, climate resilience initiatives, and deferred maintenance backlogs, leading to recurring task order awards under GWACs and IDIQs.
Small Business Size Standard
The SBA threshold that decides who can bid NAICS 237990 work as a small business.
The SBA cap for this NAICS (13 CFR 121.201). A business at or under it can self-certify as small for work in this code, which is what makes it eligible for a small-business set-aside. The cap is set per NAICS, so the same company can be small in one code and not in another.
13 CFR 121.201, effective January 1, 2026. The SBA revises the table roughly once a year.
Top Contractors
Companies with the highest total award value under NAICS 237990, ranked by dollars won.
| Company | Total Awards | Contracts |
|---|---|---|
| FERROVIAL CONSTRUCCION PR, LLC | $1.1B | 1 |
| SEE ATTACHMENT | $700.0M | 1 |
| PITTMAN-SEALEVEL, L.L.C. | $419.7M | 1 |
| MANSON CONSTRUCTION CO | $374.2M | 13 |
| THALLE - BAUER LLC | $345.2M | 1 |
| GREAT LAKES DREDGE & DOCK CO, LLC | $329.1M | 13 |
| WEEKS MARINE, INC. | $306.6M | 8 |
| J. F. BRENNAN COMPANY, INC. | $223.2M | 4 |
| ORION MARINE CONSTRUCTION, INC. | $207.8M | 5 |
| C. J. MAHAN CONSTRUCTION COMPANY, LLC | $205.8M | 3 |
Top Agencies
Federal agencies directing the most contract spending toward NAICS 237990.
Competition
How many companies historically bid on federal awards in NAICS 237990, from bidder counts reported on USAspending.
Median 3-5 bidders per reported award. · 52,400 reported awards
Median Bidders
3
Per reported award, all-time
Single-Bid Awards
32%
Share of reported awards with one bidder
10+ Bidder Awards
9%
Share of reported awards with 10+ bidders
Reported Awards
52,400
93% of 56,351 total awards
Share of reported awards in each bidder-count bracket per federal fiscal year.
How this code compares up the NAICS hierarchy. Parent cohorts pool every code under their prefix, so they are the steadier baseline when a 6-digit sample is thin.
| Industry Family | Competition | Median Bidders | Single-Bid | Bidder Mix | Reported Awards |
|---|---|---|---|---|---|
237990This Code Other Heavy and Civil Engineering Construction | Moderate Competition | 3 | 32% | 52,40093% of 56,351 | |
23799NAICS Industry | Moderate Competition | 3 | 32% | 52,40093% of 56,351 | |
2379Industry Group Other Heavy and Civil Engineering Construction | Moderate Competition | 3 | 32% | 52,40093% of 56,351 | |
237Subsector | Fewer Bidders | 2 | 35% | 162,38989% of 181,740 | |
23Sector Construction | Fewer Bidders | 2 | 40% | 1,132,66189% of 1,275,170 |
Bidder counts reported on past federal awards in this NAICS (USAspending). An open opportunity has no bidders yet, so this is the historical norm for similar work, not a fact about this solicitation. Not all awards report bidder counts, and fewer bidders often means incumbent-held work rather than an easier win. Federal reporting of bidder counts fell from ~96% of awards (FY2016) to ~30% (FY2018 onward); the chart shows shares of reported awards, and washed-out stretches mark years with fewer than 30 of them.
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Industries similar to Other Heavy and Civil Engineering Construction, by shared sector, subsector, and industry group.
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