PSC Y1LC: Construction of Tunnels and Subsurface Structures
Y1LC is the product and service code (PSC) federal agencies use for construction of tunnels and subsurface structures, in the construction of buildings 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
- 3
- Spending, FY2026
- $83.4 million
- Share to small businesses
- 53%
Open contracts with PSC Y1LC, due soonest
- USACE SPK DBB Construction - LAR C3B South - Sacramento, CA
✦ The Army Corps of Engineers Sacramento District plans to buy construction of erosion control and levee strengthening along about 1.5 miles of the south bank of the Lower American…
Due in 10 daysOct 20, 2026
- USACE SPK DBB Construction - LAR C3B North - Sacramento, CA
✦ USACE Sacramento District plans a design-bid-build construction contract (LAR C3B North) for erosion control and levee strengthening along about 1.8 miles of the north bank of…
Due in 10 daysOct 20, 2026
- USACE SPK DBB Construction - Sacramento River East Levee Contract 5 (SREL C5), Sacramento, California
✦ The Army Corps of Engineers (Sacramento District) is doing market research for a design-bid-build construction job on the Sacramento River East Levee, Contract 5, in Sacramento,…
Due in 13 daysOct 23, 2026
Where Y1LC sits in the PSC Manual
- Category: Service
- Group Y: Construct of Structures/Facilities
- Group Y1: Construction of Buildings
- Code Y1LC: Construction of Tunnels and Subsurface Structures
NAICS codes used with PSC Y1LC
The NAICS code on a contract sets the size standard for who counts as small. These are the codes agencies pair with Y1LC most often:
| NAICS | Industry | Spent, last 3 years |
|---|---|---|
| 237990 | Other Heavy and Civil Engineering Construction | $219.8 million |
| 236220 | Commercial and Institutional Building Construction | $9.1 million |
| 238220 | Plumbing, Heating, and Air-Conditioning Contractors | $7 million |
| 237110 | Water and Sewer Line and Related Structures Construction | $2.1 million |
| 541360 | Geophysical Surveying and Mapping Services | $1.3 million |
| 237310 | Highway, Street, and Bridge Construction | $470,905 |
Who buys under PSC Y1LC
Agencies with the most contract dollars under Y1LC over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Department of the Army | $216.2 million |
| Department of Veterans Affairs | $9.5 million |
| Department of the Navy | $6.4 million |
| Bureau of Reclamation | $3.8 million |
| U.S. Geological Survey | $1.3 million |
| U.S. Customs and Border Protection | $1.3 million |
| Forest Service | $1 million |
| National Park Service | $383,003 |
Federal spending under PSC Y1LC by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $96.4 million |
| FY2025 | $60.2 million |
| FY2026 | $83.4 million |
| FY2027 (so far) | $0 |
Who wins PSC Y1LC contracts
| Company | Obligated, last 3 years |
|---|---|
| The Dutra Group | $71.1 million |
| Ahtna-Forgen JV, LLC | $33.3 million |
| Maloney-Odin a Joint Venture | $27.7 million |
| Michels Construction, Inc. | $23.7 million |
| Nordic Industries Inc | $15.8 million |
| Camenzind Dutra JV LLC | $15.1 million |
| Odin Environmental Solutions, LLC | $9.8 million |
| San Rafael Rock Quarry, Inc. | $8.4 million |
| Nadiad Inc | $6.4 million |
| Cam-Dutra JV-Ii LLC | $5.8 million |
Related PSC codes
- Y111 Construction of Office Buildings
- Y112 Construct/Conf Space & Fac
- Y119 Construct/Other Admin & SVCS BLDGS
- Y121 Construct/Air Traffic Cont Towers
- Y122 Construct/Air Traffic Training Fac
- Y123 Construct/Radar & Navigational Fac
- Y124 Construction of Airport Runways
- Y125 Construction of Airport Terminals
- Y126 Construct/Missile System Facilities
- Y127 Construct/Elct & Comm System Fac
Frequently asked questions
What is PSC Y1LC?
Y1LC is the service code in the federal Product and Service Code (PSC) Manual for construction of tunnels and subsurface structures, under Y (Construct of Structures/Facilities) and Y1 (Construction of Buildings). 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 Y1LC?
Most federal contract dollars under PSC Y1LC go with NAICS 237990 (Other Heavy and Civil Engineering Construction), 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 Y1LC?
Contract opportunities are posted on SAM.gov with their PSC and NAICS codes. 3 open notices use PSC Y1LC right now. FedReady can match new ones to your business and email you, free.