PSC Z1KF: Maintenance of Dredging Facilities
Service code
Code facts
- Spend category
- Facilities & Construction Facility Related Services
- Part of
-
-
Z
- Z1
-
Z
- Contract awards
- 64 In the last 12 months
- Contract obligations
- $814,872,369 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 | $338,227,772 |
| FY2025 | $814,872,369 |
| FY2024 | $836,053,544 |
| FY2023 | $723,043,322 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Curtin Maritime Corp | $50,053,625 | |
| 2 | Donjon Marine Co., LLC | $28,473,390 | |
| 3 | Inland Dredging Company, L.L.C. | $27,895,674 | |
| 4 | Marinex Construction Inc. | $26,943,784 | |
| 5 | Great Lakes Dredge & Dock Co, LLC | $25,138,941 | |
| 6 | The Dutra Group | $22,167,026 | |
| 7 | Cottrell Contracting Corporation | $19,600,266 | |
| 8 | Mike Hooks, LLC | $17,868,250 | |
| 9 | Maverick Constructors, LLC | $11,506,484 | |
| 10 | Muddy Water Dredging LP | $10,216,720 |
See the full FY2025 ranking of PSC Z1KF contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Army | $333,633,077 | |
| 2 | Department of Homeland Security | $4,594,695 |
Top NAICS codes by obligations
| Rank | NAICS code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 237990 Other Heavy and Civil Engineering Construction | $332,052,481 | |
| 2 | 238910 Site Preparation Contractors | $3,718,439 | |
| 3 | 541380 Testing Laboratories and Services | $2,336,128 | |
| 4 | 541330 Engineering Services | $120,724 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Texas | $64,985,944 | |
| 2 | Georgia | $53,950,684 | |
| 3 | Florida | $48,686,963 | |
| 4 | New Jersey | $38,680,864 | |
| 5 | Maryland | $23,502,465 | |
| 6 | Mississippi | $19,824,002 | |
| 7 | South Carolina | $16,831,511 | |
| 8 | Pennsylvania | $15,333,848 | |
| 9 | Alaska | $14,826,397 | |
| 10 | New York | $11,616,555 | |
| 11 | North Carolina | $9,652,227 | |
| 12 | Minnesota | $7,374,400 | |
| 13 | California | $3,036,476 | |
| 14 | West Virginia | $2,286,530 | |
| 15 | Arkansas | $1,857,000 | |
| 16 | Washington | $982,500 | |
| 17 | Indiana | $365,303 | |
| 18 | Ohio | $103,776 | |
| 19 | Missouri | $68,319 |
Show all 19
Shares are of everything obligated under PSC Z1KF in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 35 more
Latest 45 of 1,514 listed here. See the rest on GovTribe.
Quick answers
What is PSC Z1KF?
PSC Z1KF is Maintenance of Dredging Facilities, a service code in PSC Z, Maintenance, Repair, Alteration Real Property.
How much do federal agencies spend under PSC Z1KF?
Federal contracts under PSC Z1KF obligated $814,872,369 in fiscal year 2025 and $2,712,197,008 in fiscal years 2023 through 2027.
Who are the largest contractors under PSC Z1KF?
The contractors with the most obligated under PSC Z1KF in fiscal years 2026 and 2027 are Curtin Maritime Corp ($50,053,625); Donjon Marine Co., LLC ($28,473,390); and Inland Dredging Company, L.L.C. ($27,895,674).
Which agencies buy the most under PSC Z1KF?
The agencies that obligated the most under PSC Z1KF in fiscal years 2026 and 2027 are Department of the Army ($333,633,077) and Department of Homeland Security ($4,594,695).
Which NAICS codes are used with PSC Z1KF?
The NAICS codes with the most obligated under PSC Z1KF in fiscal years 2026 and 2027 are 237990 Other Heavy and Civil Engineering Construction, 238910 Site Preparation Contractors and 541380 Testing Laboratories and Services.
Where is the work under PSC Z1KF performed?
By place of performance, the states with the most contract obligations under PSC Z1KF over the last 12 months are Texas ($64,985,944), Georgia ($53,950,684) and Florida ($48,686,963).
What is the latest contract opportunity under PSC Z1KF?
The latest contract opportunity under PSC Z1KF is Norfolk Harbor Inner Channel to Newport News Maintenance Dredging located in Hampton Roads, Virginia, solicitation from ENDIST Norfolk (USACE), posted October 21, 2026.
On GovTribe
See everything under PSC Z1KF
- Federal contract opportunities, awards and IDVs under this code
- Funding analysis by contractor, agency and set-aside
- Contacts who buy under this code
- Ask GovTribe AI about this code