PSC Z1LC: Maintenance of Tunnels and Subsurface Structures
Service code
Code facts
- Spend category
- Facilities & Construction Facility Related Services
- Part of
-
-
Z
- Z1
-
Z
- Contract awards
- 2 In the last 12 months
- Contract obligations
- $7,000,385 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 | $2,137,123 |
| FY2025 | $7,000,385 |
| FY2024 | $7,098,484 |
| FY2023 | $1,424,480 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Veterans Northwest Construction LLC | $1,164,627 | |
| 2 | Rhew Plumbing & Mechanical Inc. | $393,027 | |
| 3 | Innovators Transportation LLC | $314,600 | |
| 4 | RTX BBN Technologies, Inc. | $169,869 | |
| 5 | Water Works Solutions Inc. | $95,000 |
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Navy | $1,164,627 | |
| 2 | Department of Veterans Affairs | $707,627 | |
| 3 | Department of the Army | $169,869 | |
| 4 | Department of the Interior | $95,000 |
Top NAICS codes by obligations
| Rank | NAICS code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 236220 Commercial and Institutional Building Construction | $1,164,627 | |
| 2 | 237990 Other Heavy and Civil Engineering Construction | $707,627 | |
| 3 | 811210 Electronic and Precision Equipment Repair and Maintenance | $169,869 | |
| 4 | 561990 All Other Support Services | $95,000 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Washington | $1,164,627 | |
| 2 | California | $657,896 | |
| 3 | Texas | $314,600 |
Contract opportunities
Show all 30
Quick answers
What is PSC Z1LC?
PSC Z1LC is Maintenance of Tunnels and Subsurface Structures, a service code in PSC Z, Maintenance, Repair, Alteration Real Property.
How much do federal agencies spend under PSC Z1LC?
Federal contracts under PSC Z1LC obligated $7,000,385 in fiscal year 2025 and $17,660,471 in fiscal years 2023 through 2027.
Who are the largest contractors under PSC Z1LC?
The contractors with the most obligated under PSC Z1LC in fiscal years 2026 and 2027 are Veterans Northwest Construction LLC ($1,164,627), Rhew Plumbing & Mechanical Inc. ($393,027) and Innovators Transportation LLC ($314,600).
Which agencies buy the most under PSC Z1LC?
The agencies that obligated the most under PSC Z1LC in fiscal years 2026 and 2027 are Department of the Navy ($1,164,627), Department of Veterans Affairs ($707,627) and Department of the Army ($169,869).
Which NAICS codes are used with PSC Z1LC?
The NAICS codes with the most obligated under PSC Z1LC in fiscal years 2026 and 2027 are 236220 Commercial and Institutional Building Construction, 237990 Other Heavy and Civil Engineering Construction and 811210 Electronic and Precision Equipment Repair and Maintenance.
Where is the work under PSC Z1LC performed?
By place of performance, the states with the most contract obligations under PSC Z1LC over the last 12 months are Washington ($1,164,627), California ($657,896) and Texas ($314,600).
What is the latest contract opportunity under PSC Z1LC?
The latest contract opportunity under PSC Z1LC is Eisenhower Lock Tunnel Pressure Grout Repairs, award notice from Saint Lawrence Seaway Development Corporation, posted July 21, 2026.
On GovTribe
See everything under PSC Z1LC
- Federal contract opportunities, awards and IDVs under this code
- Funding analysis by contractor, agency and set-aside
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