Gahagan & Bryant Associates

What Gahagan & Bryant Associates does

Gahagan & Bryant Associates, Inc. (GBA) is a privately held US engineering consultancy founded in 1974 by William G. Gahagan and J. Franklin Bryant, specializing in dredging engineering, coastal engineering, and hydrographic surveying. The firm's core service offering comprises eight practice areas — Navigation Channel Design, Dredging Engineering, Hydrographic Surveying, Coastal Engineering, Geotechnical Services, Beneficial Use of Dredged Materials, Construction Support Services, and Agency Coordination — delivered through eight offices sited on the East, Gulf, and West coasts of the United States and supported by in-house physical assets including a research vessel fitted with two vibracore systems and a USACE-accredited sediment laboratory accredited for 14+ standardized test methods.

GBA's technology stack centers on domain-specific instrumentation rather than software platforms: certified survey crews use single beam, multi-beam, side-scan sonar, magnetometer/geophysical sensors, and UAV-borne platforms for bathymetric and coastal work; a proprietary in-house computerized cost-estimate system is used to develop contractor-grade cost models for dredging projects. The firm's competitive premise is that its designing engineers previously operated as dredging contractors (Gahagan Dredging Corporation, established 1898), giving GBA practical cost-aware judgment that pure-paper consultancies lack. The firm participates as a member of the USACE Industry Hydrographic Surveying Committee and helped establish national standards for dredging payment surveys.

GBA generates revenue through project-based professional services engagements — plans, specifications, cost estimates, surveys, construction management, and agency coordination — priced on a custom, multi-year contract basis with government agencies (US Army Corps of Engineers, US Navy, US EPA), port authorities (Oakland, Los Angeles, Long Beach, Houston, New York/New Jersey, Tampa, Miami, Baltimore), major dredging contractors (Great Lakes Dredge and Dock, Cashman), energy companies (Chevron, Kinder Morgan, Buckeye Partners, Dominion Transmission), and partner consultancies (AECOM, Moffatt & Nichol). Wholly-owned subsidiaries GBA of NC, PLLC and ACES (NY) deliver regional operations, and GBA holds a strategic 'In Alliance with' partnership with STHE for Gulf Coast work. No public revenue, funding, or valuation data is disclosed.

Name

Gahagan & Bryant Associates

Legal name

Gahagan & Bryant Associates, Inc.

Website

https://gba-inc.com

Company type

Private

Founded year

1974

Operating status

Operating

Headcount range

51–100 employees

Short description

Gahagan & Bryant Associates (GBA) is a US dredging and coastal engineering consultancy founded in 1974, serving USACE, port authorities, dredging contractors, and energy clients with hydrographic surveying, navigation channel design, and sediment engineering.

Ownership category

akta.pro rank

Product category

Coastal and Dredging Engineering Services

NAICS

Surveying and Mapping (except Geophysical) Services (541370), Geophysical Surveying and Mapping Services (541360), Environmental Consulting Services (54162)

SIC

Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Construction Management & Delivery (EPCM/CMAR/Design-Build Oversight) (EUANALAE)

akta.pro secondary industry

Hydro BOP Civil & Water Conveyance (Dams, Spillways, Penstocks, Canals) (EUAMAFAG)

Keywords

• Dredging engineering services
• Coastal engineering consulting
• Hydrographic surveying
• Port development engineering
• Navigation channel design

Headquarters

HQ city

Philadelphia

HQ country

United States

HQ region

North America

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Engineering and Consulting Services: Professional consulting and engineering services for port development, navigation channel design, dredged material management, hydrographic surveying, coastal engineering, and construction management. Revenue generated through project-based consulting engagements with government agencies and private sector clients.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Gahagan & Bryant Associates, Inc. (GBA) is a specialized dredging and coastal engineering consulting firm that delivers professional engineering, hydrographic surveying, and construction management services for ports, navigation channels, beaches, and coastal infrastructure from concept to completion. Core offerings include navigation channel design, dredging engineering, hydrographic surveying, coastal engineering, geotechnical investigation, beneficial use of dredged materials, construction support services, and federal agency (USACE) coordination.

Product overview

Gahagan & Bryant Associates (GBA) is a specialized dredging and coastal engineering consulting firm offering a comprehensive suite of professional engineering services. The company provides eight distinct service offerings: Navigation Channel Design, Dredging Engineering, Hydrographic Surveying, Coastal Engineering, Geotechnical Services, Beneficial Use of Dredged Materials, Construction Support Services, and Agency Coordination. These services are delivered as integrated consulting offerings rather than a software product platform, with the company leveraging in-house resources including research vessels equipped with vibracore systems and a USACE-accredited sediment laboratory to support projects from concept to completion.

Differentiator

Problem solved

Functional benefit

Products and services

• Navigation Channel Design Engineering design services for ship channels, turning basins, and berthing areas, including Dredged Material Management Plans (DMMP), permit applications, interagency coordination, and contract plans and specifications. Delivered to federal agencies, port authorities, and private clients responsible for port and navigation infrastructure.
• Dredging Engineering Plans and specifications, cost estimates, peer review, permitting support, field investigations, and procurement support for dredging projects including navigation channels, berths, turning basins, marinas, land reclamation, and beach renourishment. Delivered to government agencies, port authorities, and dredging contractors.
• Hydrographic Surveying Comprehensive hydrographic surveying services including single beam, multi-beam, side-scan, magnetometer/geophysical surveys, wetlands surveys, and beach profile surveys for port and navigation channel dredging projects. Delivered by professional land surveyors, NSPS-THSOA-certified hydrographers, and licensed UAV/drone pilots.
• Coastal Engineering Beach nourishment, wetland creation/restoration, artificial reef construction, shore protection, structural design, land reclamation, wave modeling, sediment transport estimates, and numerical modeling services. Delivered to state and federal agencies, port authorities, and municipalities responsible for coastal infrastructure.
• Geotechnical Services Analysis and evaluation of sediments for dredging and construction methods, in-house vibracore systems, and USACE-accredited sediment laboratory testing for material composition and beach compatibility. Supports dredging engineering, construction, and coastal restoration projects.
• Beneficial Use of Dredged Materials Environmental restoration services that transform dredged material from waste into a resource asset, including wetland restoration, hydraulic studies, water quality analysis, feasibility studies, and construction specifications. Delivered to port authorities, federal agencies, and environmental programs.
• Construction Support Services Supervision and inspection services for dredging projects from operations through final material placement, including before/during/after construction surveys, progress reporting, and quality management.
• Agency Coordination Assistance with U.S. Army Corps of Engineers coordination, drafting and negotiating agreements between government and Local Sponsors, cost-sharing negotiations, and Project Partnership Agreement requirements. Delivered to local sponsors of federal water resource projects.

Quantifiable outcome

• Surveyed every major port in the United States
• +2 more outcomes

Named customers15 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• STHEminorStrategic or Co-development PartnerSTHE (possibly South Texas Historical/Environmental entity) is listed as 'In Alliance with' on GBA's website homepage. The nature of this alliance appears to be a strategic partnership for coastal and environmental engineering projects in the Gulf Coast region.

Scale indicators7 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Jacobs: Global engineering professional services firm with deep USACE and federal waterways work, competing on coastal, navigation, and port projects across the same agencies GBA serves.
• Tetra Tech: Large engineering and environmental services firm with a coastal/water-resources practice that competes with GBA on federal water infrastructure and dredging-support contracts.
• Stantec: Multi-disciplinary engineering firm with water and coastal practices pursuing federal and municipal waterfront projects comparable in scope to GBA's navigation and coastal engagements.
• AECOM: Global engineering and program-management incumbent that participates in the same USACE and port-authority procurements as GBA and is both a partner and client of GBA, illustrating the broader competitive and collaborative overlap.
• WSP: International engineering consultancy with a U.S. environment and water practice pursuing coastal resilience, port, and dredging-adjacent work overlapping GBA's federal and port-authority book.

Direct peers

• Taylor Engineering: Specialized coastal, water-resources, and environmental engineering firm focused on Florida and the Southeast, competing with GBA on beach nourishment, dredging support, and coastal restoration work.
• Anchor QEA: Waterfront, sediment, and environmental engineering firm that competes in dredged-material management, beneficial use, and coastal restoration — directly overlapping GBA's geotechnical and beneficial-use services.
• Moffatt & Nichol: Coastal, maritime, and water-resources engineering firm of comparable scale that competes directly with GBA on navigation, dredging, and port projects and is itself a GBA partner/client, indicating closely overlapping service lines.
• Olsen Associates: Boutique coastal engineering consultancy with deep experience in beach nourishment, inlet management, and coastal design — closely aligned with GBA's coastal-engineering service line.

Regional players

• Halff Associates: Texas/Southeast-focused engineering firm with coastal and water-resources practices that overlap GBA's Houston/Tampa service territory on dredging-support and coastal restoration bids.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Gahagan & Bryant Associates