multi-beam surveys

Gahagan & Bryant Associates, Inc. (GBA) is an engineering firm specializing in consulting, engineering and survey services for dredging and marine-related projects, including port development, navigation channel design, dredged material management, hydrographic surveying, coastal engineering and construction management. Founded in 1974 by William G. Gahagan and J. Franklin Bryant, GBA has offices on the east, west and gulf coasts and is one of the largest U.S. engineering firms specializing in dredging and marine projects.

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Beach profile surveyscoastal engineeringCoastal structure designconstruction managementCost EstimatingDredging engineeringgeotechnical investigationshydraulic modelinghydrographic surveyingMagnetometer/geophysical surveysNavigation channel designnumerical modelingpermitting supportSediment transport estimatesSide-scan surveysSingle beam surveysWave modelingWetlands surveys

HydroTerra Technologies, LLC is a full service land and hydrographic surveying firm based in Scott, Louisiana, specializing in inshore and near-shore shallow water hydrographic surveying and a wide range of land survey services. Initially formed as a consulting firm, it provides cost-effective land and hydrographic solutions including oil and gas well location surveys, pipeline and utility route surveys, right-of-way mapping, dredging support surveys, hazard surveys, bathymetric surveys, GIS acquisition and development, consulting and training, and mappi

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bathymetric surveysconstruction layoutdredge support surveysdrone based LiDAR surveysgeodetic control surveysGIS acquisition and developmenthydrographic surveyingland surveyingmagnetic surveysmapping and chartingmarine pipeline route surveys and stakeoutremote sensing surveysside scan sonar surveyssite clearance and hazard surveyssonar imagingsub-bottom surveyssubsidence monitoringvessel based LiDAR surveys