PSC C1LB: Architect and Engineering – Construction: Highways, Roads, Streets, Bridges, and Railways
C1LB is the product and service code (PSC) federal agencies use for architect and engineering – construction: highways, roads, streets, bridges, and railways, in the arch – eng svcs – construction group. Here are the contracts open under it now, the NAICS codes it pairs with, and who buys and wins this work.
- Open contracts now
- 1
- Spending, FY2026
- $72.5 million
- Share to small businesses
- 32%
Open contracts with PSC C1LB, due soonest
- CFLHD Indefinite Delivery, Indefinite Quantity (IDIQ) for Architect-Engineer Design Services
✦ The Federal Highway Administration's Central Federal Lands Highway Division plans multiple IDIQ contracts for architect-engineer design services on federal land roads across 14…
Due in 4 daysOct 15, 2026
Where C1LB sits in the PSC Manual
- Category: Service
- Group C: Architect/Engineer Services
- Group C1: Arch – Eng SVCS – Construction
- Code C1LB: Architect and Engineering – Construction: Highways, Roads, Streets, Bridges, and Railways
NAICS codes used with PSC C1LB
The NAICS code on a contract sets the size standard for who counts as small. These are the codes agencies pair with C1LB most often:
| NAICS | Industry | Spent, last 3 years |
|---|---|---|
| 541330 | Engineering Services | $156.7 million |
| 237310 | Highway, Street, and Bridge Construction | $11.4 million |
| 541370 | Surveying and Mapping (except Geophysical) Services | $4 million |
| 541310 | Architectural Services | $4 million |
| 238990 | All Other Specialty Trade Contractors | $867,836 |
| 236220 | Commercial and Institutional Building Construction | $833,519 |
Who buys under PSC C1LB
Agencies with the most contract dollars under C1LB over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Federal Highway Administration | $126.3 million |
| Department of Veterans Affairs | $14.6 million |
| Department of the Navy | $10.5 million |
| Department of the Army | $7.8 million |
| Forest Service | $6.2 million |
| U.S. Coast Guard | $5.3 million |
| Department of the Air Force | $4.2 million |
| National Park Service | $1.7 million |
Federal spending under PSC C1LB by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $52.3 million |
| FY2025 | $54.1 million |
| FY2026 | $72.5 million |
| FY2027 (so far) | $-3,184 |
Who wins PSC C1LB contracts
| Company | Obligated, last 3 years |
|---|---|
| WSP USA Inc. | $22.2 million |
| HDR Engineering, Inc. | $17.1 million |
| Dj&a, P.C. | $13.1 million |
| Jacobs Engineering Group Inc. | $11.9 million |
| Aecom Technical Services, Inc. | $10.6 million |
| Department of Transportation California | $10.6 million |
| Johnson, Mirmiran & Thompson, Inc. | $10.5 million |
| Yeh and Associates, Inc | $7.1 million |
| Bravo Co Vi LLC | $6.6 million |
| Atkinsrealis USA Inc. | $6.4 million |
Related PSC codes
- C111 BLDGS & Fac / Admin & SVC BLDGS
- C112 BLDGS & Fac / Airfield, Com & MSL F
- C113 Educational Buildings
- C114 Hospital Buildings
- C115 Industrial Buildings
- C116 Residential Buildings
- C117 Warehouse Buildings
- C118 Research and Development Facilities
- C119 Other Buildings
- C121 Conservation and Development
Frequently asked questions
What is PSC C1LB?
C1LB is the service code in the federal Product and Service Code (PSC) Manual for architect and engineering – construction: highways, roads, streets, bridges, and railways, under C (Architect/Engineer Services) and C1 (Arch – Eng SVCS – Construction). Agencies put a PSC on every contract to record what they bought.
What is the difference between a PSC and a NAICS code?
A PSC describes what the government is buying. A NAICS code describes the industry of the business doing the work, and it sets the SBA size standard for small business set-asides. Every contract notice has both.
Which NAICS code goes with PSC C1LB?
Most federal contract dollars under PSC C1LB go with NAICS 541330 (Engineering Services), according to USAspending.gov. The contracting officer picks the NAICS code for each solicitation, so check the notice.
How do I find contracts that use PSC C1LB?
Contract opportunities are posted on SAM.gov with their PSC and NAICS codes. 1 open notices use PSC C1LB right now. FedReady can match new ones to your business and email you, free.