NAICS UNIVERSITY · Free research for insurance agents
Water and Sewer Line and Related Structures Construction
NAICS 237110 · United States · 2022 edition
This industry comprises establishments primarily engaged in the construction of water and sewer lines, mains, pumping stations, treatment plants, and storage tanks. 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 water, sewer line, and related structures construction. All structures (including buildings) that are integral parts of water and sewer networks (e.g., storage tanks, pumping stations, water treatment plants, and sewage treatment plants) are included in this industry.
Start the review with underground utility strikes.
For Water and Sewer Line and Related Structures Construction, the saved research highlights underground utility strikes, completed operations, pollution and environmental liability. Confirm how these arise in the actual operation, what controls are used and whether additional services change the proposed coverage.
Questions to ask
- What types of projects make up the bulk of the work — residential laterals, municipal mains, treatment plant construction, or a mix?
- Does the contractor perform any trenchless work such as horizontal directional drilling or pipe bursting, and if so, what is the approximate revenue split?
- What is the total value of owned heavy equipment, and is any equipment rented to or borrowed by other contractors?
- Does the contractor use subcontractors, and what is the process for collecting and verifying certificates of insurance?
- Are any projects performed under owner-controlled or contractor-controlled insurance programs (OCIPs/CCIPs), and if so, what coverages are typically excluded from wrap-ups?
- Has the contractor had any underground utility strike incidents, trench collapses, or pollution-related claims in the prior five years?
- Does the scope of work ever include design-build delivery or any in-house engineering and design functions?
- What is the typical project owner type — municipal, state agency, private developer — and what are the standard insurance certificate requirements?
Activities described by this code
- Distribution line, sewer and water, construction
- Sewer main, pipe and connection, construction
- Fire hydrant installation
- Storm sewer construction
- Irrigation systems construction
- Water main and line construction
- Sewage disposal plant construction
- Water treatment plant construction
- Pumping station, water and sewage system, construction
- Water system storage tank and tower construction
- Reservoir construction
- Water well drilling, digging, boring, or sinking
- (except water intake wells in oil and gas fields)
Other activities to examine
- Constructing marine facilities (e.g., ports), flood control structures, dams, or hydroelectric power generation facilities: 237990 — Other Heavy and Civil Engineering Construction
- Installing septic tanks: 238910 — Site Preparation Contractors
- Drilling oil and gas field water intake wells: 213111 — Drilling Oil and Gas Wells;
- Installing and maintaining water and sewer lines performed by water and sewage utilities companies: 2213 — Water, Sewage and Other Systems
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
Water and sewer line contractors construct, replace, and rehabilitate underground and above-ground water distribution and wastewater collection infrastructure — including mains, laterals, force mains, pumping stations, treatment plants, storage tanks, and reservoirs. Day-to-day work typically involves open-cut trenching or trenchless methods (directional drilling, pipe bursting), heavy equipment operation, excavation in public rights-of-way, and coordination with municipalities and utilities. Projects range from small residential service connections to large public works contracts.
Questions to investigate
- What types of projects make up the bulk of the work — residential laterals, municipal mains, treatment plant construction, or a mix?
- Does the contractor perform any trenchless work such as horizontal directional drilling or pipe bursting, and if so, what is the approximate revenue split?
- What is the total value of owned heavy equipment, and is any equipment rented to or borrowed by other contractors?
- Does the contractor use subcontractors, and what is the process for collecting and verifying certificates of insurance?
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.