NAICS UNIVERSITY · Free research for insurance agents
Other Heavy and Civil Engineering Construction
NAICS 237990 · United States · 2022 edition
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.
Start the review with completed operations.
For Other Heavy and Civil Engineering Construction, the saved research highlights completed operations, contractor's pollution liability, workers' compensation. Confirm how these arise in the actual operation, what controls are used and whether additional services change the proposed coverage.
Questions to ask
- What specific project types make up the majority of revenue — dredging, marine/dock, tunneling, railroad, land drainage, park improvement, or a mix?
- Are any operations conducted on or over water, or are workers ever classified as seamen or harbor workers under Jones Act or USL&H?
- Does the firm perform any design-build work or provide engineering input as part of construction contracts?
- What is the total value of owned heavy equipment, including any dredges, tunnel boring machines, or directional drills?
- Have any projects involved known contaminated sites, Superfund areas, or dredging of historically contaminated waterways?
- What contract limit requirements are typical from project owners — specifically for GL, umbrella, and pollution liability?
- Does the firm use specialty subcontractors, and what is the process for verifying their insurance meets project requirements?
- Any prior completed-operations, pollution, or marine claims in the past five years?
Activities described by 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
- Railroad construction
- Golf course construction
- Subway construction
- Horizontal drilling (e.g., cable, pipeline, sewer installation)
- Trenching, underwater
- Hydroelectric generating station construction
- Tunnel construction
Other activities to examine
- Constructing water mains, sewers, and related structures: 237110 — Water and Sewer Line and Related Structures Construction
- Constructing oil and gas pipelines and related structures: 237120 — Oil and Gas Pipeline and Related Structures Construction
- Constructing power and communication transmission lines and related structures: 237130 — Power and Communication Line and Related Structures Construction
- Installing and maintaining electric power lines and towers performed by electric utility companies: 2211 — Electric Power Generation, Transmission and Distribution
- Installing and maintaining communication transmission lines and towers performed by telecommunications companies: 517 — Telecommunications
- Constructing highways, streets, and bridges: 237310 — Highway, Street, and Bridge Construction
- Trenching (except underwater) or removing dams, dikes, and other heavy and civil engineering constructions: 238910 — Site Preparation Contractors;
- Inspecting pipelines (i.e., visual): 541990 — All Other Professional, Scientific, and Technical Services
Census classification reference
For educational purposes only. AI-generated insurance research and automated logic can contain errors. Independently verify classification and coverage decisions.
Compare another operationInsurance operations research — draft
Contractors in this class perform heavy civil engineering projects that don't fit highway, bridge, or utility-line categories — including dredging canals and waterways, constructing dams and flood control structures, building marine facilities and docks, boring tunnels and subways, installing underground infrastructure via horizontal drilling or microtunneling, constructing railroad beds, and improving parks and open recreational spaces. Work is almost entirely project-based at client-owned or government-owned sites, often involving heavy equipment, subsurface work, and environmental sensitivity.
Questions to investigate
- What specific project types make up the majority of revenue — dredging, marine/dock, tunneling, railroad, land drainage, park improvement, or a mix?
- Are any operations conducted on or over water, or are workers ever classified as seamen or harbor workers under Jones Act or USL&H?
- Does the firm perform any design-build work or provide engineering input as part of construction contracts?
- What is the total value of owned heavy equipment, including any dredges, tunnel boring machines, or directional drills?
This insurance research was generated in April 2026. It has not received a complete human review. The October 12, 2026 audit checked codes and titles only, not descriptions or coverage assertions.