Gahagan & Bryant Associates (GBA)

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Engineering Service

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.

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. The firm was established in 1975 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.

GBA is an outgrowth of the Gahagan Overseas Construction Company (later the Gahagan Dredging Corporation), which was a leading international contractor from its origin in 1898. In 1952, 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. The practical, and cost-effective approach to problem solutions that typify a successful contracting organization continues with the services offered by GBA today.

GBA was founded on the belief that in order to properly design a dredging program, the designing engineers must have “hands-on” field experience in carrying out real world dredging contracting.

1) Dredging

GBA approaches the solution to a dredging need based on its extensive experience as a major dredging contractor.

2) Hydrographic Surveys

GBA is a pioneer in the field of hydrographic surveying and has a broad range of experience and background surveying for every major port in the U.S. Surveying for navigation channel dredging and coastal projects.

3) Dredged Material

GBA approaches the solution to a dredging need based on its past experience as a major dredging contractor and current project experience from coast to coast.

4) Navigational Channel Design

GBA has been actively involved in designing ship channels, turning basins, and berthing areas throughout the United States.

5) Coastal Engineering

GBA has extensive experience in beach nourishment, wetland creation/restoration, artificial reef construction, shore protection, structural design and more.

6) Construction Management

Our services cover all phases of construction from dredge operations to the final placement of the dredged materials.

  • Address GBA Philadelphia
    3460 North Delaware Ave
    Suite 308
    Philadelphia, PA 19134-6311
    (215) 425-6283
    (215) 425-6284 Fax



    GBA Wilmington, DE
    3801 Kennett Pike
    Suite C302
    Wilmington, DE 19807-2321
    (302) 652-4948
    (302) 655-9218 Fax

    GBA Baltimore
    9008-O Yellow Brick Road
    Baltimore, MD 21237-5608
    (410) 682-5595
    (410) 682-2175 Fax

    GBA Wilimington, NC
    295-A North Green Meadows Drive
    Wilmington, NC 28405-3933
    (910) 313-3338
    (910) 313-6822 Fax

    GBA Tampa
    3802 West Bay to Bay Blvd
    Suite B-22
    Tampa, FL 33629-6826
    (813) 831-4408
    (813) 831-4216 Fax

    GBA Houston
    9330 Kirby Drive
    Suite 100
    Houston, TX 77054-2515
    (832) 377-4800
    (832) 377-4802 Fax

    GBA Los Angeles
    10541 Humbolt Street
    Los Alamitos, CA 90720
    (310) 521-8127

    GBA San Francisco
    600 Martin Avenue,
    Suite 200
    Rohnert Park, CA 94928
    (707) 595-3492
    (707) 595-3520 fax

    GBA Plantation
    7501 NW 4th Street
    Suite 208
    Plantation, FL 33317

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