237990 - Other Heavy and Civil Engineering Construction

Introduction

If you're involved in the heavy civil construction industry or considering entering this robust sector, understanding NAICS Code 237990 is essential. This category covers a wide range of specialized construction projects that don't fall into other specific classifications but are critical to infrastructure development. From underwater construction to pile driving and flood control systems, businesses under NAICS 237990 are the backbone of numerous large-scale engineering projects. Whether you’re a contractor, government agency, or supplier, knowing this NAICS code can help guide your business decisions, compliance, and contracting opportunities.

What is NAICS Code 237990?

NAICS Code 237990 is classified under the Construction sector and titled Other Heavy and Civil Engineering Construction. This industry comprises establishments primarily engaged in heavy and civil engineering construction projects that are not specifically classified elsewhere.

These projects include specialized construction services such as underwater construction, pile driving, dredging, and other heavy engineering tasks essential for infrastructure and environmental protection.

Sector & Industry Overview

• Sector: Construction
• Title: Other Heavy and Civil Engineering Construction
• Industry Focus: Heavy and specialized civil engineering projects not included in other NAICS codes.

Typical business activities within this industry involve complex, large-scale construction operations that often require specialized equipment and expertise. This includes projects like dam construction, marine structures, flood control systems, tunnels, and various forms of earth retention systems.

Size Standard

• Small Business Size Standard: $45 million (average annual receipts)
  This size standard helps determine eligibility for small business certifications and government contracting preferences under the NAICS code 237990.

Typical Businesses Under NAICS 237990

• Underwater construction contractors
• Pile driving contractors
• Specialized heavy construction contractors handling unique civil engineering projects like dredging, flood control, and marine structures

These businesses often provide turnkey solutions for projects requiring deep knowledge of heavy civil construction, environmental regulations, and engineering best practices.

Code Details Table

Construction Activity	Description
Anchored earth retention contractors	Installation of earth retention systems anchored for stability
Athletic field (except stadium) construction	Construction of sports playing fields
Avalanche, rockslide, mudslide, or roadside protection construction	Protective structures against natural hazards
Breakwater construction	Coastal protection structures
Bridle path construction	Building horse trails and paths
Bulkhead wall or embankment construction	Shore protection and embankment installation
Caisson (marine or pneumatic structures) construction	Underwater foundation elements
Canal construction	Excavation and creation of canals
Channel construction	Construction of waterway channels
Cofferdam construction	Temporary enclosures for underwater work
Construction management (dams, marine structures, mass transit, tunnels)	Oversight of heavy civil projects
Cribbing (shore protection) construction	Shore supportive frameworks
Dam construction	Building water retaining structures
Dike and other flood control structure construction	Flood prevention structures
Dock construction	Building maritime docking facilities
Drainage canal and ditch construction	Water drainage infrastructure
Dredging (canal, channel, ditch, waterway)	Removal of sediment from water bodies
Drive-in movie facility construction	Outdoor entertainment facility construction
Earth retention system construction	Systems for slope stabilization
Earth-filled dam construction	Dam construction using earth materials
Electricity generating plant, hydroelectric construction	Hydroelectric power plant building
Embankment construction	Construction of earthen ridges and walls
Farm drainage tile installation	Agricultural water management
Flood control project construction	Wide-ranging flood protection projects
Floodway canal and ditch construction	Floodway water conveyance systems
Gabion construction	Rock-filled wire basket structures
Golf course construction	Construction of golf course grounds
Harbor construction	Port and harbor infrastructure
Helical pier construction (marine or pneumatic structures)	Helical pile foundation systems
Horizontal drilling (underground cable, pipeline, sewer installation)	Trenchless installation techniques
Hydroelectric generating facility construction	Building hydroelectric generation plants
Ice rink (except indoor) construction	Outdoor ice rink building
Jetty construction	Coastal and harbor piers
Land drainage contractors	Agricultural and land water management
Levee construction	Flood protection levees
Light rail system construction	Rail transit infrastructure
Lock and waterway construction	Waterway navigation locks
Marine construction	Construction of marine structures
Microtunneling contractors	Small diameter tunnel excavation
Missile facility construction	Specialized facility construction
Monorail construction	Elevated rail transit systems
Nuclear waste disposal site construction	Construction of facilities for nuclear waste
Outdoor recreation facility construction	Parks, trails, and recreation areas
Park and recreational open space improvement construction	Enhancing public outdoor spaces
Pier construction	Dockside structures
Pile driving, marine	Driving piles underwater or near shore
Pipe-jacking contractors	Underground pipe installation
Playground construction	Building public playgrounds
Port facility construction	Construction of port infrastructure
Power plant, hydroelectric, construction	Hydropower generation facility construction
Railroad construction	Rail track and related structures
Railway construction (interlocker, roadbed, signal, track)	Comprehensive railway system building
Railway roadbed construction	Rail foundation works
Recreation area, open space construction	Development of recreational lands
Recreational vehicle park construction	Construction of RV parks
Retaining walls, anchored (with piles, soil nails, tieback anchors) construction	Stabilization walls with support systems
Revetment construction	Shoreline erosion control structures
Riprap installation	Rock placement for shoreline protection
Rock removal, underwater	Underwater rock blasting and removal
Seawall, wave protection construction	Coastal barrier construction
Sediment control system construction	Erosion and sediment runoff management
Ski tow construction	Facilities for ski lift systems
Spillway, floodwater construction	Water flow control structures
Sports field construction	Outdoor sports facility construction
Streetcar line construction	Urban streetcar infrastructure
Subway construction	Underground urban rail construction
Tennis courts, outdoor, construction	Building outdoor tennis facilities
Timber removal, underwater	Underwater timber extraction
Trail construction	Building walking and biking trails
Trenching, underwater	Underwater trench excavation
Tunnel construction	Subsurface passage construction
Wharf construction	Waterfront docking and handling structures

Frequently Asked Questions (FAQs)

What types of construction projects does NAICS 237990 cover?

NAICS 237990 covers heavy and civil engineering construction projects not classified under other specific NAICS codes, including underwater construction, pile driving, marine and flood control projects, tunnels, and other specialized heavy construction activities.

What is the size standard for small businesses under NAICS 237990?

The SBA size standard is $45 million in average annual receipts. Businesses below this threshold may qualify as small businesses for government contracting.

Can companies specializing in underwater construction fall under NAICS 237990?

Yes, underwater construction contractors are typically classified under NAICS 237990.

How does NAICS 237990 differ from other heavy construction codes?

This code includes specialized heavy civil engineering projects that don’t fit into other classifications such as highway or bridge construction, making it a catch-all for unique heavy construction activities.

Why is knowing the NAICS code important for contractors?

Knowing your NAICS code helps identify proper business classification, aids in government contracting, ensures compliance with procurement requirements, and assists in applying for small business certifications.

---

Understanding NAICS Code 237990 is vital for businesses operating in the heavy civil engineering construction space. Whether you're managing flood control projects, building marine structures, or facilitating highway tunnels, this code reflects your industry segment accurately and opens doors to appropriate contracts and certifications.

For government contractors and private-sector stakeholders alike, aligning with the correct NAICS code ensures smoother project bidding and better market positioning in the construction sector.