NAICS Code 237990: Other Heavy and Civil Engineering Construction
National industry
SBA small business size standard: $45 million in average annual receipts
Definition
This industry comprises establishments primarily engaged in heavy and civil engineering construction projects (excluding highway, street, bridge, and distribution line construction). The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to heavy and civil engineering construction projects (excluding highway, street, bridge, distribution line, oil and gas structure, and utilities building and structure construction).
Construction projects involving water resources (e.g., dredging and land drainage), development of marine facilities, and projects involving open space improvement (e.g., parks and trails) are included in this industry.
Code facts
- Part of
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23
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237
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2379
- 23799
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2379
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237
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23
- Contract awards
- 726 In the last 12 months
- Contract obligations
- $10,226,172,871 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 237990
- Anchored earth retention contractors
- Athletic field (except stadium) construction
- Avalanche, rockslide, or mudslide protection construction
- Breakwater construction
- Bridle path construction
- Bulkhead wall or embarkment construction
- Caisson (i.e., marine or pneumatic structures) construction
- Canal construction
- Channel construction
- Cofferdam construction
- Construction management, dam
- Construction management, marine structure
- Construction management, mass transit
- Construction management, outdoor recreation facility
- Construction management, tunnel
- Cribbing (i.e., shore protection), construction
- Dam construction
- Dike and other flood control structure construction
- Dock construction
- Drainage canal and ditch construction
- Drainage project construction
- Dredging (e.g., canal, channel, ditch, waterway)
- Drive-in movie facility construction
- Earth retention system construction
- Earth-filled dam construction
- Electricity generating plant, hydroelectric, construction
- Embankment construction
- Farm drainage tile installation
- Flood control project construction
- Floodway canal and ditch construction
- Gabion construction
- Golf course construction
- Harbor construction
- Horizontal drilling (e.g., underground cable, pipeline, sewer installation)
- Hydroelectric generating facility construction
- Ice rink (except indoor) construction
- Jetty construction
- Land drainage contractors
- Levee construction
- Light rail system construction
- Lock and waterway construction
- Marine construction
- Microtunneling contractors
- Missile facility construction
- Monorail construction
- Nuclear waste disposal site construction
- Outdoor recreation facility construction
- Park and recreational open space improvement construction
- Pier construction
- Pile driving, marine
- Pipe-jacking contractors
- Play ground construction
- Port facility construction
- Power plant, hydroelectric, construction
- Railroad construction
- Railway construction (e.g., interlocker, roadbed, signal, track)
- Railway roadbed construction
- Recreation area, open space, construction
- Recreational vehicle park construction
- Retaining walls, anchored (e.g., with piles, soil nails, tieback anchors), construction
- Revetment construction
- Riprap installation
- Rock removal, underwater
- Seawall, wave protection, construction
- Sediment control system construction
- Ski tow construction
- Spillway, floodwater, construction
- Sports field construction
- Streetcar line construction
- Subway construction
- Tennis courts, outdoor, construction
- Timber removal, underwater
- Trail construction
- Trenching, underwater
- Tunnel construction
- Wharf construction
Show all 76
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Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $28,157,530 |
| FY2026 | $11,694,537,576 |
| FY2025 | $10,226,172,871 |
| FY2024 | $10,238,465,127 |
| FY2023 | $9,134,684,042 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Thalle Construction Co Inc. | $1,918,109,078 | |
| 2 | Barnard Construction Company, Incorporated | $1,338,480,554 | |
| 3 | Ferrovial Construccion PR, LLC | $1,079,074,401 | |
| 4 | Pittman-Sealevel, L.L.C. | $420,667,904 | |
| 5 | Thalle - Bauer LLC | $378,960,240 | |
| 6 | Dragados / Hawaiian Dredging / Orion JV | $353,845,511 | |
| 7 | Flatiron-Aecon Joint Venture | $320,187,168 | |
| 8 | Kiewit-Alberici Siop Macc AJV | $291,891,408 | |
| 9 | C.j. Mahan Construction Company, LLC | $251,758,568 | |
| 10 | Forgen-Odin JV | $223,329,913 |
See the full FY2025 ranking of NAICS 237990 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Army | $9,503,816,341 | |
| 2 | Department of the Navy | $1,319,494,350 | |
| 3 | Department of the Interior | $504,019,694 | |
| 4 | Department of Veterans Affairs | $211,371,873 | |
| 5 | Department of Homeland Security | $81,868,414 | |
| 6 | Air Force | $39,166,074 | |
| 7 | Department of Agriculture | $39,033,341 | |
| 8 | Department of Commerce | $7,673,085 | |
| 9 | Department of Energy | $4,894,462 | |
| 10 | Department of State | $4,750,818 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Y1KB Construction of Canals | $3,060,989,321 | |
| 2 | Z2KA Repair or Alteration of Dams | $1,891,049,242 | |
| 3 | Y1PZ Construction of Other Non-Building Facilities | $1,560,193,178 | |
| 4 | Y1KA Construction of Dams | $1,069,144,469 | |
| 5 | Y1ED Construction of Ship Construction and Repair Facilities | $652,848,053 | |
| 6 | Y1KF Construction of Dredging Facilities | $525,877,015 | |
| 7 | Z1KF Maintenance of Dredging Facilities | $450,769,377 | |
| 8 | Z2ED Repair or Alteration of Ship Construction and Repair Facilities | $323,107,805 | |
| 9 | Z2PZ Repair or Alteration of Other Non-Building Facilities | $268,866,826 | |
| 10 | Z1KB Maintenance of Canals | $234,272,398 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Florida | $2,328,679,026 | |
| 2 | California | $2,010,287,105 | |
| 3 | Puerto Rico | $1,082,910,846 | |
| 4 | Washington | $618,235,485 | |
| 5 | Louisiana | $601,277,622 | |
| 6 | Hawaii | $551,930,747 | |
| 7 | Kentucky | $407,560,112 | |
| 8 | Virginia | $379,974,109 | |
| 9 | Texas | $362,842,564 | |
| 10 | Tennessee | $293,021,578 | |
| 11 | Oregon | $191,106,943 | |
| 12 | Alaska | $187,566,693 | |
| 13 | Mississippi | $185,078,519 | |
| 14 | Pennsylvania | $183,779,530 | |
| 15 | Missouri | $158,909,300 | |
| 16 | Maryland | $157,924,803 | |
| 17 | New Jersey | $157,783,418 | |
| 18 | Illinois | $137,357,257 | |
| 19 | Arkansas | $121,694,157 | |
| 20 | Michigan | $117,583,328 | |
| 21 | New York | $106,360,447 | |
| 22 | Ohio | $102,852,847 | |
| 23 | Maine | $102,507,028 | |
| 24 | Alabama | $96,069,668 | |
| 25 | Georgia | $80,603,113 | |
| 26 | Delaware | $56,526,622 | |
| 27 | South Carolina | $51,823,316 | |
| 28 | Nevada | $50,691,167 | |
| 29 | Nebraska | $50,040,655 | |
| 30 | Iowa | $47,499,870 | |
| 31 | Oklahoma | $46,230,812 | |
| 32 | Minnesota | $44,035,700 | |
| 33 | Colorado | $42,009,417 | |
| 34 | Montana | $38,351,579 | |
| 35 | Arizona | $37,451,883 | |
| 36 | North Carolina | $36,181,718 | |
| 37 | South Dakota | $32,726,282 | |
| 38 | Guam | $30,260,057 | |
| 39 | West Virginia | $25,556,068 | |
| 40 | Idaho | $22,180,272 | |
| 41 | Indiana | $19,762,373 | |
| 42 | North Dakota | $17,462,394 | |
| 43 | Wisconsin | $14,435,349 | |
| 44 | Connecticut | $13,112,322 | |
| 45 | Massachusetts | $12,541,137 | |
| 46 | Utah | $11,318,233 | |
| 47 | District of Columbia | $8,412,779 | |
| 48 | Wyoming | $7,066,050 | |
| 49 | New Mexico | $6,966,875 | |
| 50 | Rhode Island | $4,344,156 | |
| 51 | Kansas | $2,163,164 | |
| 52 | American Samoa | $922,100 | |
| 53 | Vermont | $486,682 | |
| 54 | New Hampshire | $16,391 |
Show all 54
Shares are of everything obligated under NAICS 237990 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 39 more
Latest 49 of 31,308 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 237990?
NAICS 237990 is Other Heavy and Civil Engineering Construction, a national industry in NAICS 23, Construction.
What is the NAICS code for dam construction?
The NAICS code for dam construction is 237990, Other Heavy and Civil Engineering Construction.
What is the NAICS code for dock construction?
The NAICS code for dock construction is 237990, Other Heavy and Civil Engineering Construction.
What is the NAICS code for pier construction?
The NAICS code for pier construction is 237990, Other Heavy and Civil Engineering Construction.
When did the size standard for NAICS 237990 last change?
The most recent Federal Register rule on record that names NAICS 237990 in the SBA's size standards is "Small Business Size Standards: Adjustment of Monetary-Based Size Standards, Disadvantage Thresholds, and 8(a) Eligibility Thresholds for Inflation" (87 FR 69118), published Nov 17, 2022 and effective Dec 19, 2022.
How much do federal agencies spend under NAICS 237990?
Federal contracts under NAICS 237990 obligated $10,226,172,871 in fiscal year 2025 and $41,322,017,146 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 237990?
The contractors with the most obligated under NAICS 237990 in fiscal years 2026 and 2027 are Thalle Construction Co Inc. ($1,918,109,078); Barnard Construction Company, Incorporated ($1,338,480,554); and Ferrovial Construccion PR, LLC ($1,079,074,401).
Which agencies buy the most under NAICS 237990?
The agencies that obligated the most under NAICS 237990 in fiscal years 2026 and 2027 are Department of the Army ($9,503,816,341), Department of the Navy ($1,319,494,350) and Department of the Interior ($504,019,694).
Which PSC codes are used with NAICS 237990?
The PSC codes with the most obligated under NAICS 237990 in fiscal years 2026 and 2027 are Y1KB Construction of Canals, Z2KA Repair or Alteration of Dams and Y1PZ Construction of Other Non-Building Facilities.
Where is the work under NAICS 237990 performed?
By place of performance, the states with the most contract obligations under NAICS 237990 over the last 12 months are Florida ($2,328,679,026), California ($2,010,287,105) and Puerto Rico ($1,082,910,846).
What is the latest contract opportunity under NAICS 237990?
The latest contract opportunity under NAICS 237990 is Pensacola Harbor Navigation Channel Maintenance Dredging, solicitation from ENDIST Mobile (USACE), posted November 6, 2026.
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