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NAICS Code· 237110

NAICS 237110: Water and Sewer Line and Related Structures Construction

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. Illustrative Examples: 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) Cross-References. Establishments primarily engaged in--Show more

NAICS 237110 – Water and Sewer Line and Related Structures Construction encompasses the design, installation, rehabilitation, and maintenance of potable water distribution systems, sanitary and stormwater sewer networks, pumping stations, manholes, catch basins, and associated conveyance infrastructure. This sector supports critical public health and environmental compliance objectives through the construction of buried pipelines, trenchless technologies, and hydraulic structures that integrate with municipal, federal, and tribal water resource systems.

815
Active Contracts
$1.4B
Total Obligations (12mo)
698
Awarded Contracts (12mo)
422
Contractors Awarded (12mo)
2
Median Bidders per Award
-42.6%
YoY Growth

Industry Spending Overview

Federal obligations, top contractors and agencies, and related industry codes for NAICS 237110.

AI Industry Description

NAICS 237110 – Water and Sewer Line and Related Structures Construction encompasses the design, installation, rehabilitation, and maintenance of potable water distribution systems, sanitary and stormwater sewer networks, pumping stations, manholes, catch basins, and associated conveyance infrastruct...

NAICS 237110 – Water and Sewer Line and Related Structures Construction encompasses the design, installation, rehabilitation, and maintenance of potable water distribution systems, sanitary and stormwater sewer networks, pumping stations, manholes, catch basins, and associated conveyance infrastructure. This sector supports critical public health and environmental compliance objectives through the construction of buried pipelines, trenchless technologies, and hydraulic structures that integrate with municipal, federal, and tribal water resource systems. In the federal contracting landscape, this NAICS code serves as a foundational component of infrastructure resilience initiatives, often tied to environmental remediation, facility modernization, and disaster recovery programs under the jurisdiction of multiple federal agencies. Top contractors in this space include AAECON GENERAL CONTRACTING LLC, DAP CONSTRUCTION MANAGEMENT LLC, ASPEN CONSTRUCTION COMPANY, MAVERICK CONSTRUCTORS, LLC, PHOENIX GENERAL CONTRACTORS, LLC, SEPTECH ATL LLC, VSGI LLC, ELBOW GREASE ENTERPRISES, LLC, and KLEINFELDER, INC. These firms range from specialized small businesses with niche expertise in trenchless rehabilitation to larger primes with multi-disciplinary civil engineering capabilities, reflecting a competitive landscape that values technical proficiency in pipe lining, directional drilling, and corrosion-resistant material applications. The Department of Veterans Affairs, Department of Defense, Department of Agriculture, Department of the Interior, Department of Labor, Department of Justice, and Department of Homeland Security are the primary federal buyers. Demand is driven by the need to upgrade aging infrastructure on military installations, VA medical campuses, national parks, rural water systems, and federal detention or correctional facilities, often under mandates for sustainability and regulatory compliance. The market presents consistent opportunity density due to the aging national water and sewer infrastructure and ongoing federal investment in climate-resilient utilities. Contractors with proven experience in ANSI/AWWA standards, ASTM material specifications, and federal construction regulations such as the Davis-Bacon Act are well-positioned to compete effectively in this technical and compliance-heavy sector.

Top Contractors

Companies with the highest total award value under NAICS 237110, ranked by dollars won.

Ranked by total awards
CompanyTotal AwardsContracts
HENSEL PHELPS CONSTRUCTION CO$309.7M1
AMES FEDERAL CONTRACTING GROUP LLC$129.5M2
RECORD STEEL AND CONSTRUCTION, INC.$129.2M1
PERINI MANAGEMENT SERVICES, INC.$111.8M2
G.S.E. CONSTRUCTION COMPANY, INC.$109.5M1
FLATLAND ENERGY SERVICES LLC$75.5M1
RED POINT CONSTRUCTION, LLC$48.4M1
RED EAGLE 3 JV$22.9M1
MEITEC, INC.$22.2M1
KYUNAN CO., LTD.$21.2M1

Top Agencies

Federal agencies directing the most contract spending toward NAICS 237110.

Department Of The Interior113 awards$642.6M
Navfacsyscom Hawaii1 award$309.7M
Department Of Defense195 awards$215.0M
Department Of Veterans Affairs39 awards$89.1M
Department Of The Interior (doi)39 awards$61.7M
W2SN Endist Alaska1 award$48.4M
Department Of Agriculture46 awards$28.2M
249-NETWORK Contract Office 9 (36C249)1 award$10.7M
Department Of Transportation7 awards$9.5M
Department Of Justice11 awards$8.6M

Competition

How many companies historically bid on federal awards in NAICS 237110, from bidder counts reported on USAspending.

Fewer Bidders

Median under 3 bidders per reported award. · 27,082 reported awards

Median Bidders

2

Per reported award, all-time

Single-Bid Awards

43%

Share of reported awards with one bidder

10+ Bidder Awards

3%

Share of reported awards with 10+ bidders

Reported Awards

0

86% of 31,548 total awards

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 FamilyCompetitionMedian BiddersSingle-BidBidder MixReported Awards
237110This Code
Water and Sewer Line and Related Structures Construction
Fewer Bidders243%
27,08286% of 31,548
23711NAICS Industry
Fewer Bidders243%
27,08286% of 31,548
2371Industry Group
Utility System Construction
Fewer Bidders245%
44,11889% of 49,673
237Subsector
Fewer Bidders235%
162,19989% of 181,512
23Sector
Construction
Fewer Bidders240%
1,131,28289% of 1,273,592

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.

Related NAICS Codes

Industries similar to Water and Sewer Line and Related Structures Construction, by shared sector, subsector, and industry group.

Oil and Gas Pipeline and Related Structures Construction

This industry comprises establishments primarily engaged in the construction of oil and gas lines, m...
237120Same Industry GroupHigh Similarity

Power and Communication Line and Related Structures Construction

This industry comprises establishments primarily engaged in the construction of power lines and towe...
237130Same Industry GroupHigh Similarity

Land Subdivision

This industry comprises establishments primarily engaged in servicing land and subdividing real prop...
237210Same SubsectorMedium Similarity

Highway, Street, and Bridge Construction

This industry comprises establishments primarily engaged in the construction of highways (including ...
237310Same SubsectorMedium Similarity

Other Heavy and Civil Engineering Construction

This industry comprises establishments primarily engaged in heavy and civil engineering construction...
237990Same SubsectorMedium Similarity

New Single-Family Housing Construction (except For-Sale Builders)

This U.S. industry comprises general contractor establishments primarily responsible for the entire ...
236115Same SectorMedium Similarity

New Multifamily Housing Construction (except For-Sale Builders)

This U.S. industry comprises general contractor establishments primarily responsible for the constru...
236116Same SectorMedium Similarity

New Housing For-Sale Builders

This U.S. industry comprises establishments primarily engaged in building new homes on land that is ...
236117Same SectorMedium Similarity

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NAICS 237110 FAQ

Frequently Asked Questions

NAICS code 237110 covers Water and Sewer Line and Related Structures Construction. 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. Illustrative Examples: 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) Cross-References. Establishments primarily engaged in--

Recently Posted in Water and Sewer Line and Related Structures Construction

NAICS: 237110
New
SLED
6-Inch Outlet Pipe InstallationThis subcontract opportunity with the West Virginia Department of Transportation involves the installation of a 6-inch outlet pipe for stormwater drainage systems. The project is located in Harrison and falls under the NAICS code 237110 for heavy and civil engineering construction. The solicitation was posted on October 20, 2026, with a corresponding response deadline on the same date. Interested parties can find further details and proposal information through the provided BIDX portal link.
WVDOT

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NAICS: 237110
New
SLED
HP12x84 Steel Pile DrivingThe contract involves the driving of HP12x84 steel piles to provide deep foundation support for a construction project under the jurisdiction of the West Virginia Department of Transportation. The work is designated as a subcontract and falls under NAICS code 237110, indicating it relates to highway, street, and bridge construction. The place of performance is in Harrison, West Virginia, though specific site details and address information are not provided. The solicitation was posted on October 20, 2026, with the same date set as the response deadline, suggesting a immediate or same-day tender process. No set-aside provisions or organization type restrictions have been specified, and no point of contact information is listed. Bidders must submit proposals through the provided UI link to the WVDOT letting system for consideration.
WVDOT

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in about 2 months

DEADLINE

in about 2 months
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NAICS: 237110
New
SLED
Free Draining Base Trench ConstructionThe contract pertains to the installation of a free draining base in trench form for subsurface drainage purposes under a subcontract arrangement with the West Virginia Department of Transportation. The work is scoped specifically to construct trenches designed to facilitate effective water drainage beneath surface layers, ensuring long-term structural integrity and erosion control. The project is classified under NAICS code 237110, indicating it falls within the heavy and civil engineering construction category, and the place of performance is centered in Harrison County, West Virginia, with no other geographic details specified. The solicitation was posted on October 20, 2026, with the same date set as the response deadline, suggesting an immediate or non-competitive procurement process. There is no identified set-aside or small business preference, and no point of contact is provided for inquiries. The official link for proposal submission is accessible via the BIDX platform, indicating a digital procurement environment managed by the state transportation agency.
WVDOT

POSTED

in about 2 months

DEADLINE

in about 2 months
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NAICS: 237110
New
SLED
Inlet and Drainage Structure InstallationThe contract pertains to the installation of Type G inlets as a critical component of a storm drainage system within Harrison, West Virginia, under the oversight of the West Virginia Department of Transportation. This subcontract is tied to infrastructure development aimed at enhancing stormwater management, with work specifically focused on integrating these inlets into the existing or planned drainage network. The solicitation was posted on October 20, 2026, with the same date set as the response deadline, indicating a very tight or possibly administratively consolidated procurement timeline. The NAICS code 237110 designates the work as related to highway, street, and bridge construction, emphasizing its public infrastructure nature. Although the contract lacks specific set-aside designations or detailed point of contact information, the place of performance is clearly localized to Harrison, and all work is expected to comply with state and federal transportation standards for drainage infrastructure. Interested parties must submit proposals via the provided UI link before the deadline to be considered.
WVDOT

POSTED

in about 2 months

DEADLINE

in about 2 months
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NAICS: 237110
New
SLED
Utility Coordination & RelocationThe contract pertains to the identification, marking, and relocation of underground utilities that interfere with the construction of ADA-compliant ramps in Kanawha, West Virginia. Work scope involves precise surveying and coordination to locate utility lines such as water, sewer, gas, telecommunications, and electrical infrastructure, ensuring they are properly marked and safely moved to accommodate new ramp installations without disruption to public services. All activities must align with accessibility standards and construction protocols to maintain compliance with federal and state regulations. This subcontract is issued by the West Virginia Department of Transportation under NAICS code 237110, which classifies it as a utility and sewer line construction project. The solicitation was posted on October 20, 2026, with the same date set as the response deadline, indicating an immediate or same-day award process. The place of performance is limited to Kanawha, and while no detailed point of contact or set-aside information is provided, the contract requires contractors to demonstrate experience in underground utility coordination and familiarity with ADA construction requirements in municipal infrastructure projects.
WVDOT

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in about 2 months

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in about 2 months
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NAICS: 237110
New
SLED
Culvert RemovalThe contract involves the complete removal of existing culverts spanning over 1,080 linear feet, requiring extensive excavation, dismantling of structures, and thorough site restoration to return the area to its original condition. This work is part of a larger infrastructure effort under the California Department of Transportation, specifically tied to project 04-0W0504, with performance taking place in Alameda. The scope demands precise engineering and environmental compliance to ensure minimal disruption and proper rehabilitation of the surrounding land. The contract is classified as a subcontract under NAICS code 237110, which pertains to highway, street, and bridge construction. Despite the solicitation number being absent, the posting date and response deadline are both listed as September 17, 2026, indicating a planned procurement timeline for future work. There is no set-aside designation specified, and the contract does not include details on the point of contact or specific administrative requirements beyond the location and type of work. The link provided directs to the official bidding platform where interested parties can access further submission guidelines and documentation.
California Department of Transportation

POSTED

in 20 days

DEADLINE

in 20 days
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NAICS: 237110
New
SLED
Utility Coordination and RelocationThe contract involves coordinating with utility providers to safely relocate or protect gas, electric, telecommunications, and water lines during construction activities in Doddridge and Harrison counties in West Virginia. This subcontract is tied to infrastructure work requiring precise collaboration with multiple utility agencies to ensure service continuity and public safety throughout the project lifecycle. The work aligns with NAICS code 237110, indicating it falls under utility system construction, and is managed by the West Virginia Department of Transportation. All utility relocations and protective measures must be executed in compliance with state and local regulations, with timelines synchronized to construction schedules to minimize disruptions. The solicitation was posted on September 15, 2026, with a matching response deadline, suggesting this is a same-day award opportunity requiring immediate proposal submission. The place of performance is restricted to specific areas within Doddridge and Harrison, necessitating local expertise and familiarity with regional utility networks and environmental conditions.
West Virginia Department of Transportation

POSTED

in 18 days

DEADLINE

in 18 days
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NAICS: 237110
New
SLED
Drainage System ConstructionThe contract pertains to the construction of a drainage system for highway infrastructure, specifically involving the installation of free-draining base trenches and outlet pipes to manage surface water runoff. Work is to be performed in Marion, West Virginia, under the oversight of the West Virginia Department of Transportation, with the project classified under NAICS code 237110 for highway and street construction. The submission deadline and posting date are both set for September 15, 2026, indicating a single-day response window, suggesting a streamlined or time-sensitive procurement process. This is a subcontract opportunity, meaning the primary contractor will engage a subcontractor to fulfill these specific drainage installation tasks, and no set-aside preferences or organizational type restrictions are indicated. The location of performance is clearly defined but broader geographic details such as state, zip, or contact information are unspecified in the provided data.
West Virginia Department of Transportation

POSTED

in 18 days

DEADLINE

in 18 days
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NAICS: 237110
New
SLED
Drainage Structure InstallationThe contract is for the installation of drainage infrastructure including culverts, storm drains, catch basins, and associated piping systems under a subcontract classified under NAICS code 237110, which pertains to water and wastewater treatment and other related construction activities. The work is to be performed in Lincoln, West Virginia, under the oversight of the West Virginia Department of Transportation. The solicitation was posted on September 15, 2026, with a response deadline set for the same date, indicating a potentially urgent or consolidated procurement schedule. No set aside status or organizational type is specified, and no point of contact information is provided in the details. The contract is accessible via a designated online portal linked through the West Virginia DOT’s letting system, and all work must comply with state transportation standards and timelines.
West Virginia Department of Transportation

POSTED

in 18 days

DEADLINE

in 18 days
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NAICS: 237110
New
SLED
Ductile Iron Pipe Installation (4”–24” NPS)The contract entails the supply, delivery, bedding, backfill, and installation of ductile iron pipe ranging from 4 to 24 inches in nominal pipe size for the relocation of a water system along the I-26 corridor. All work must adhere strictly to ASTM and AWWA standards to ensure material quality, structural integrity, and long-term performance of the water infrastructure. The project location is centered in Calhoun, Orangeburg, with all activities required to be performed at this designated place of performance. The contract is classified as a subcontract under NAICS code 237110, indicating it relates to water and sewer line and related structures construction. The solicitation was posted on September 9, 2026, with the same date set as the response deadline, suggesting a streamlined or immediate procurement timeline. The awarding agency is the South Carolina Department of Transportation, reflecting the project's alignment with state transportation infrastructure upgrades.
SCDOT

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in 12 days

DEADLINE

in 12 days
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NAICS: 237110
New
SLED
Drainage System InstallationThe contract involves the installation of storm drains, culverts, catch basins, and associated drainage infrastructure as part of civil improvements under a subcontract awarded by the California Department of Transportation. The work is specifically focused on improving drainage systems in Madera, California, to support transportation infrastructure resilience and functionality. All tasks must comply with state and federal standards for civil works, ensuring proper water management, erosion control, and long-term durability of the installed systems. The solicitation was posted on September 3, 2026, with a response deadline set for the same date, indicating an immediate or expedited procurement timeline. The NAICS code 237110 designates this as a highway and street construction activity, aligning it with transportation-related civil engineering projects. The place of performance is strictly limited to Madera, and no additional geographic flexibility is permitted. The contract does not specify a set-aside classification, meaning it is open to all qualified subcontractors without preferential treatment based on business size or ownership status.
California Department of Transportation

POSTED

in 6 days

DEADLINE

in 6 days
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NAICS: 237110
New
SLED
Drainage System InstallationThe contract pertains to the installation of stormwater drainage systems and associated infrastructure as part of a subcontract under the Maryland Department of Transportation. The work is designated under NAICS code 237110, specifically for stormwater and sewer system construction, and is scheduled for performance in Prince George’s County. The solicitation was posted and the response deadline is set for September 3, 2026, indicating a long lead time for potential bidders to prepare proposals. The nature of the contract as a subcontract suggests it is part of a larger transportation or infrastructure project managed by the agency. No set-aside provisions or specific organization types are identified, and complete contact details or address information are not provided in the data, requiring interested parties to consult the linked portal for further instructions and requirements.
Maryland Department of Transportation

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in 6 days

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in 6 days
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