What is the SBA size standard for NAICS 237310?

The SBA size standard for NAICS 237310 (Highway, Street, and Bridge Construction) is $45 million in average annual receipts, per 13 C.F.R. § 121.201.

Which federal agencies buy under NAICS 237310?

For FY2024 reporting, the leading federal customers under NAICS 237310 were U.S. Army Corps of Engineers, Federal Highway Administration, Department of Defense, Department of the Interior, National Park Service. Live obligation data is available on USAspending.gov.

What FAR or DFARS clauses commonly apply to NAICS 237310 contracts?

Frequent clause flowdowns include FAR 52.222-6 (Construction Wage Rate Requirements); FAR 52.236-2 (Differing Site Conditions); FAR 52.236-13 (Accident Prevention); FAR 52.225-9 (Buy American — Construction Materials); FAR 52.236-15 (Schedules for Construction Contracts). Each contract instrument will incorporate clauses by reference under FAR 52.252-2; this list reflects the high-frequency set for this NAICS, not an exhaustive flowdown.

Construction

NAICS 237310 — Highway, Street, and Bridge Construction

Heavy civil construction of roads, highways, bridges, and related infrastructure. Federal use includes Federal Highway Administration (FHWA) federal-lands projects, military base roads, and DOT bridge programs.

Quick facts

SBA size standard: $45 million; Average annual receipts · 13 C.F.R. § 121.201
FY2024 federal obligations: $2B–$5B; See live USAspending.gov data →

Top federal customers

Federal agencies that obligate the most spending under NAICS 237310 (FY2024 reporting period). Order tracks federal-obligation volume on USAspending.gov.

1.U.S. Army Corps of Engineers
2.Federal Highway Administration
3.Department of Defense
4.Department of the Interior
5.National Park Service

Set-aside fit

Whether NAICS 237310 commonly carries set-aside designations on federal awards. Eligibility for any specific solicitation is set by the contracting officer; this table reflects the FY2024 award pattern, not a guarantee of set-aside status.

SDVOSB (Service-Disabled Veteran-Owned Small Business)
8(a) Business Development Program
HUBZone Small Business
WOSB / EDWOSB
VOSB (Veteran-Owned Small Business)

HUBZone is particularly active here because of rural-route work. SDVOSB sole-source and competitive set-asides common on federal-lands projects.

Frequent prime contractors

Companies that most frequently appear as prime awardees under NAICS 237310 for FY2024. Drawn from USAspending.gov public award records — verify currency at the live link below.

Granite Construction
Kiewit Corporation
Flatiron Construction
Lane Construction
Ames Construction
APAC
Sundt Construction
Skanska USA Civil
Walsh Construction
Tutor Perini

See live award data on USAspending.gov →

Common FAR / DFARS clauses

Frequently flowed-down clauses on contracts in this NAICS. The clause text on acquisition.gov is authoritative; this list captures the practical pattern, not an exhaustive flowdown.

FAR 52.222-6Construction Wage Rate Requirements
Davis-Bacon highway-specific wage determinations apply.
FAR 52.236-2Differing Site Conditions
Bridge and roadway subsurface risk allocation.
FAR 52.236-13Accident Prevention
Highway work-zone safety flowdowns.
FAR 52.225-9Buy American — Construction Materials
Iron and steel preference enforced strictly on federal-aid highway and bridge projects.
FAR 52.236-15Schedules for Construction Contracts
Highway projects have hard schedule constraints driven by traffic-control plans.

Indirect rate considerations

Heavy civil firms run substantial equipment fleets. USACE EP 1110-1-8 ownership and operating rates dominate the indirect cost structure. Aggregate, asphalt, and concrete pass-throughs need materials-handling treatment. Bonding cost is direct.

See FieldLedger's Indirect Rate Engine for pool definition and rate tracking, or read the FieldLedger methodology for the underlying FAR Part 31 framework.

How FieldLedger fits NAICS 237310

Equipment costing under USACE EP 1110-1-8 is essential. Project P&L for job-cost tracking. Multi-CLIN invoicing for highway pay applications. Davis-Bacon compliance via signed timekeeping.

DCAA compliance →Indirect Rate Engine →DCAA readiness check →

Frequently asked

What is the SBA size standard for NAICS 237310?: The SBA size standard for NAICS 237310 (Highway, Street, and Bridge Construction) is $45 million in average annual receipts, per 13 C.F.R. § 121.201.
Is NAICS 237310 eligible for SDVOSB, 8(a), HUBZone, or WOSB set-asides?: Set-aside programs that commonly apply: SDVOSB, 8(a), HUBZone, WOSB, VOSB. HUBZone is particularly active here because of rural-route work. SDVOSB sole-source and competitive set-asides common on federal-lands projects.
Which federal agencies buy under NAICS 237310?: For FY2024 reporting, the leading federal customers under NAICS 237310 were U.S. Army Corps of Engineers, Federal Highway Administration, Department of Defense, Department of the Interior, National Park Service. Live obligation data is available on USAspending.gov.
What FAR or DFARS clauses commonly apply to NAICS 237310 contracts?: Frequent clause flowdowns include FAR 52.222-6 (Construction Wage Rate Requirements); FAR 52.236-2 (Differing Site Conditions); FAR 52.236-13 (Accident Prevention); FAR 52.225-9 (Buy American — Construction Materials); FAR 52.236-15 (Schedules for Construction Contracts). Each contract instrument will incorporate clauses by reference under FAR 52.252-2; this list reflects the high-frequency set for this NAICS, not an exhaustive flowdown.
What indirect-rate structure works for a federal contractor in NAICS 237310?: Heavy civil firms run substantial equipment fleets. USACE EP 1110-1-8 ownership and operating rates dominate the indirect cost structure. Aggregate, asphalt, and concrete pass-throughs need materials-handling treatment. Bonding cost is direct.
How does FieldLedger help small federal contractors in NAICS 237310?: Equipment costing under USACE EP 1110-1-8 is essential. Project P&L for job-cost tracking. Multi-CLIN invoicing for highway pay applications. Davis-Bacon compliance via signed timekeeping.

Sources

U.S. Census NAICS manual — census.gov/naics
SBA size-standards table — 13 C.F.R. § 121.201 (eCFR)
Federal obligations + prime awardees — USAspending.gov NAICS 237310
FAR / DFARS clause text — acquisition.gov

Snapshot date: 2026-05-08 (FY2024 reporting period). Federal-obligation bands and prime-contractor lists reflect the data as of the snapshot — refresh against USAspending.gov for current figures.