Great Lakes Dredge & Dock Co, LLC
Houston, TX Doing business as Great Lakes Dredge & Dock Co, LLC Part of Great Lakes Dredge & Dock Corporation
- UEI
- M9LFLA6K8HE4
- CAGE
- 1BSU5
- Primary NAICS
- 237990 Other Heavy and Civil Engineering Construction
- SAM.gov registration
- Active through
Company facts
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- NAICS codes registered in SAM.gov
- Corporate family
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Great Lakes Dredge & Dock Corporation
Parent
Y1TKNHJ8TK71
- Great Lakes Dredge & Dock Co, LLC M9LFLA6K8HE4
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Great Lakes Dredge & Dock Corporation
Parent
Y1TKNHJ8TK71
- SAM.gov registration date
- Physical address
- 9811 Katy Fwy Suite 1200, Houston, TX 77024, USA
- Website
- gldd.com
- Founded
- 1890
- Employees
- 251-1K
- Estimated annual revenue
- $500M-$1B
- Industry
-
- Industrials
- Capital Goods
- Construction & Engineering
- SIC code
- 87 Engineering & Management Services
- Profiles
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Recent federal awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| Station dredging, mkarns SWT task order #13. (replace task order #10 - W9127S25F0034). Work shall be complete within 126… | ENDIST Little Rock | $1,857,000 | |
| Jacksonville harbor, maintenance dredging bar cut-3 through cut-17 and cut-55 through lower terminal channel duval… | ENDIST Jacksonville | $8,478,400 | |
| Provides construction services, including furnishing personnel, transportation, mobilization and demobilization,… | ENDIST Savannah | $18,135,000 | |
| Beach renourishment palm beach midtown palm beach county, florida | ENDIST Jacksonville | $21,519,400 | |
| FY26 south atlantic division (SAD) regional harbor dredging contract (rhdc), contract 2 | ENDIST Wilmington | $28,556,041 |
About Great Lakes Dredge & Dock Co, LLC
Great Lakes Dredge & Dock Co, LLC, a subsidiary of Houston-based Great Lakes Dredge & Dock Corporation, is the federal government's primary large-scale dredging and marine construction contractor, operating as a prime contractor on 100% of its 1,115 recent federal awards across the U.S. Army Corps of Engineers without competing under any small-business set-asides. The company specializes in hopper dredging, cutterhead hydraulic pipeline dredging, maintenance dredging, beach renourishment, and coastal storm risk management across harbor channels, inland waterways, and shoreline projects nationwide.
Customer concentration flows heavily through Army Corps of Engineers districts. The top five funding entities account for approximately 74% of combined potential value: the Department of the Army Corps of Engineers Engineering District Jacksonville leads with 72 awards worth $2.44 billion (centered on Florida harbor and beach projects); the broader Department of the Army Corps of Engineers carries 426 awards totaling $2.06 billion; the Philadelphia District holds 53 awards valued at $1.36 billion (primarily New Jersey and Delaware beach nourishment); the New York District commands 55 awards worth $1.18 billion; and the Charleston District anchors $694.4 million across 15 awards. The portfolio spans 35 distinct federal agencies, but Corps work dominates by multiple magnitudes.
Activity has remained steady at 15–22 awards annually over the past five years; the company is currently executing $10.52 billion in combined potential value across all awards, with $9.75 billion obligated. Primary NAICS classification is 237990 (Other Heavy and Civil Engineering Construction), which covers 519 of 526 awards with category data; PSC codes concentrate in Maintenance Of Dredging Facilities (106 awards), Construction Of Dredging Facilities (77), and related dredging maintenance and repair (71 and 66 respectively).
Representative recent prime work includes a $235.4 million hopper dredging contract for the Sabine-Neches Waterway Channel Improvement Project in Texas (September 2024), a $174.8 million channel improvement and dredging reach contract for Freeport Harbor (July 2023), a $117.98 million beach fill project in Beach Haven, New Jersey (August 2024), a $113.5 million Manasquan Beach Fill modification in New Jersey (October 2024), and a $74.3 million emergency renourishment contract for Myrtle Beach, South Carolina (December 2024). The company also holds three indefinite delivery/indefinite quantity vehicles: a $98 million single-award hopper dredging contract for Freeport Harbor through December 2026 (U.S. Army Corps of Engineers), a $59.1 million single-award station dredging IDIQ for the McClellan-Kerr Arkansas River Navigation System through August 2027 with eleven task orders issued ranging from $280,500 to $6.7 million, and a $49.5 million multiple-award DREDGE MATOC through September 2027.
Nine awards with ultimate completion in the next twenty-four months carry combined potential value of $528.6 million, signaling a material recompete cliff in that window. The company does not sub-award work; its award footprint is 100% prime delivery.
Contract vehicles
Quick answers
What is Great Lakes Dredge & Dock Co, LLC's UEI?
Great Lakes Dredge & Dock Co, LLC's Unique Entity ID (UEI) in SAM.gov is M9LFLA6K8HE4.
What is Great Lakes Dredge & Dock Co, LLC's CAGE code?
Great Lakes Dredge & Dock Co, LLC's CAGE code is 1BSU5.
What is Great Lakes Dredge & Dock Co, LLC's primary NAICS code?
Great Lakes Dredge & Dock Co, LLC's primary NAICS code is 237990 (Other Heavy and Civil Engineering Construction).
Where is Great Lakes Dredge & Dock Co, LLC located?
Great Lakes Dredge & Dock Co, LLC's physical address in SAM.gov is 9811 Katy Fwy Suite 1200, Houston, TX 77024, USA.
Is Great Lakes Dredge & Dock Co, LLC registered in SAM.gov?
Yes. Great Lakes Dredge & Dock Co, LLC's SAM.gov registration is active through June 22, 2027.
Who is Great Lakes Dredge & Dock Co, LLC's parent company?
Great Lakes Dredge & Dock Co, LLC is part of Great Lakes Dredge & Dock Corporation.
Which contract vehicles does Great Lakes Dredge & Dock Co, LLC hold?
Great Lakes Dredge & Dock Co, LLC holds a place on 5 federal contract vehicles, including FY 22 DREDGE MATOC.
What is Great Lakes Dredge & Dock Co, LLC's most recent federal award?
Great Lakes Dredge & Dock Co, LLC's most recent federal contract award is Station dredging, mkarns SWT task order #13. (replace task order #10 - W9127S25F0034). Work shall be complete within 126… (W9127S26FA081), from ENDIST Little Rock, on April 22, 2026.
On GovTribe
See Great Lakes Dredge & Dock Co, LLC's full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
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