Who We Are

Gahagan & Bryant Associates, Inc. (GBA) is a unique engineering firm that specializes in providing consulting and engineering services for a variety of projects, including port development, dredged material management, hydrographic surveying, coastal engineering and construction management.

Presently, GBA is one of the largest engineering firms in the United States specializing in dredging and marine related projects. GBA was founded on the belief that in order to properly design a dredging program, the designing engineers must have “hands-on” field experience to be able to provide practical and cost effective projects.

Our History


Gahagan Overseas Construction Company (later the Gahagan Dredging Corporation) is established which was a leading international contractor.


Gahagan Overseas Construction Company undertook the dredging of the Orinoco River to facilitate access to Venezuelan iron ore. Later, Gahagan Dredging developed and pioneered the use of spider barges and hydraulic unloaders for the placement of runway fill at Kennedy, Newark and Logan international airports and the placement of road base for a portion of I-95 in northern New Jersey.


Gahagan & Bryant Associates, Inc. was established by William G. Gahagan and J. Franklin Bryant, two engineers both of whom had compiled 20 years of field experience with major dredging firms operating throughout the United States, South America and the Middle East.

Clients We Serve

Here are some of the Federal agencies, Port Authorities, States & local municipalities as well as private sector companies we have had the opportunity and privilege to work with.

  • City of San Francisco
  • California State Coastal Conservancy
  • Delaware DNR
  • Louisiana DNR
  • Martin County FL
  • US Corps of Engineers- Multiple Districts
  • US Environmental Protection Agency
  • Gloucester County Improvement Authority
  • Maryland Environmental Service
  • Naval Facilities Engineering Command
  • New Hanover County NC
  • NJ DOT
  • San Mateo County Harbor District
  • NASA
  • Texas General Land Office

  • Oakland
  • Los Angeles
  • Long Beach
  • Corpus Christi
  • Freeport
  • Galveston
  • Houston
  • Lake Charles
  • Tampa
  • Manatee
  • Miami
  • Everglades
  • Jacksonville
  • Savannah
  • Wilmington, NC
  • Norfolk
  • Baltimore
  • Wilmington, DE
  • Philadelphia
  • New York/New Jersey

  • Cashman
  • Cottrell
  • Dutra
  • Great Lakes
  • Larison
  • Manson
  • Corman Marine
  • Marinex
  • Norfolk
  • R.E. Staite
  • Sevenson
  • Weeks
  • Southwind

  • Buckeye Partners
  • Chevron
  • Jacobs
  • Applied Coastal
  • Atkins
  • JMT
  • Stantec
  • WSP
  • Moffatt & Nichol
  • Towill
  • Towill
  • EA Engineering
  • Dominion Transmission
  • Haley & Aldrich
  • Colonial Terminals
  • Jupiter Island
  • Ports America
  • National Gypsum
  • Conolly Pacific
  • Johnson Frank
  • Anchor
  • Kinder Morgan
  • Martin Energy
  • Kiewit
  • Skanska
  • Urban Engineers

Service Areas

GBA offices are located in Tampa FL, Philadelphia PA, Baltimore MD, Wilmington NC, Houston TX, Los Angeles CA, and San Francisco CA providing capability to our clients coast to coast. GBA of NC, PLLC maintains an office in Wilmington, NC to provide engineering and surveying services in North Carolina. ACES is the operating LLC for providing engineering and surveys in New York.

GBA Philadelphia

3460 North Delaware Ave
Suite 308
Philadelphia, PA 19134-6311

Tel: (215) 425-6283

GBA Houston

2911 South Shore Blvd
Suite 107
League City, TX 77573

Tel: (832) 377-4800

GBA Wilmington, NC

295-A North Green Meadows Drive
Wilmington NC 28405-3933

Tel: (910) 313-3338

GBA Baltimore

9008 Yellow Brick Road, Suite P
Baltimore, MD 21237-5608

Tel: (410) 682-5595

Fax: (410) 682-2175

GBA Los Angeles

10541 Humbolt Street
Los Alamitos, CA 90720

Tel: (310) 521-8127

GBA Tampa

3802 West Bay to Bay Blvd
Suite B-22
Tampa, FL 33629-6826

Tel: (310) 521-8127

Fax: (310) 521-8127

GBA San Francisco

3100 Dutton Avenue
Suite 120
Santa Rosa, CA 95407

Tel: (707) 595-3492

Our Commitment To Sound Engineering and Experience-based Solutions

From its inception, GBA has operated under the guiding principle of bringing its exceptional brand of specialized and practical experience to every project with uncompromising integrity and professionalism.