PSC Y1LC: Construction of Tunnels and Subsurface Structures
Service code
Code facts
- Spend category
- Facilities & Construction Construction Related Services
- Part of
-
-
Y
- Y1
-
Y
- Contract awards
- 5 In the last 12 months
- Contract obligations
- $59,804,810 In FY2025
PSC codes and definitions come from the GSA PSC Manual and contract spending from SAM.gov/FPDS.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $83,224,889 |
| FY2025 | $59,804,810 |
| FY2024 | $96,435,304 |
| FY2023 | $197,559,321 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | The Dutra Group | $71,108,400 | |
| 2 | Pipkin Inc. | $3,830,735 | |
| 3 | Ahtna-Forgen JV, LLC | $3,130,430 | |
| 4 | Camenzind Dutra JV LLC | $2,636,320 | |
| 5 | ED Rike Plumbing, Inc. | $1,528,358 | |
| 6 | Nordic Industries Inc. | $736,587 | |
| 7 | Maloney-Odin A Joint Venture | $647,109 | |
| 8 | Odin Environmental Solutions, LLC | $469,715 | |
| 9 | Ahtna-Great Lakes E&I JV | $320,416 | |
| 10 | Proesl BAU GMBH | $268,031 |
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Army | $79,525,318 | |
| 2 | Department of the Interior | $3,416,471 | |
| 3 | Department of Veterans Affairs | $261,100 | |
| 4 | Department of Agriculture | $22,000 |
Top NAICS codes by obligations
| Rank | NAICS code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 237990 Other Heavy and Civil Engineering Construction | $82,719,921 | |
| 2 | 238220 Plumbing, Heating, and Air-Conditioning Contractors | $1,541,446 | |
| 3 | 238990 All Other Specialty Trade Contractors | $268,031 | |
| 4 | 237310 Highway, Street, and Bridge Construction | $12,155 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | California | $78,867,287 | |
| 2 | Washington | $3,830,735 | |
| 3 | Ohio | $1,541,446 | |
| 4 | Georgia | $22,000 | |
| 5 | Michigan | $12,155 |
Contract opportunities
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Quick answers
What is PSC Y1LC?
PSC Y1LC is Construction of Tunnels and Subsurface Structures, a service code in PSC Y, Construction of Structures/
How much do federal agencies spend under PSC Y1LC?
Federal contracts under PSC Y1LC obligated $59,804,810 in fiscal year 2025 and $437,024,325 in fiscal years 2023 through 2027.
Who are the largest contractors under PSC Y1LC?
The contractors with the most obligated under PSC Y1LC in fiscal years 2026 and 2027 are The Dutra Group ($71,108,400); Pipkin Inc. ($3,830,735); and Ahtna-Forgen JV, LLC ($3,130,430).
Which agencies buy the most under PSC Y1LC?
The agencies that obligated the most under PSC Y1LC in fiscal years 2026 and 2027 are Department of the Army ($79,525,318), Department of the Interior ($3,416,471) and Department of Veterans Affairs ($261,100).
Which NAICS codes are used with PSC Y1LC?
The NAICS codes with the most obligated under PSC Y1LC in fiscal years 2026 and 2027 are 237990 Other Heavy and Civil Engineering Construction; 238220 Plumbing, Heating, and Air-Conditioning Contractors; and 238990 All Other Specialty Trade Contractors.
Where is the work under PSC Y1LC performed?
By place of performance, the states with the most contract obligations under PSC Y1LC over the last 12 months are California ($78,867,287), Washington ($3,830,735) and Ohio ($1,541,446).
What is the latest contract opportunity under PSC Y1LC?
The latest contract opportunity under PSC Y1LC is Construct Interim Remedial Action (IRA) for the Nelson Tunnel Superfund Site, pre-solicitation from ENDIST Omaha (USACE), posted October 16, 2026.
On GovTribe
See everything under PSC Y1LC
- Federal contract opportunities, awards and IDVs under this code
- Funding analysis by contractor, agency and set-aside
- Contacts who buy under this code
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