cofferdam installation

Coastal Engineering, LLC is an ADCI-certified, Veteran-Owned Small Business specializing in underwater construction and QA/QC services. Its team includes licensed Professional Engineers and ADCI-certified commercial divers delivering underwater inspection, repair, and marine construction for bridges, dams, water/wastewater facilities, and other marine infrastructure.

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concrete and timber coresconfined space entrydredging and debris removalhydrographic surveysmarine salvagematerial testingpenetration divespipe crawler inspectionQA/QC inspectionROV inspectionscour evaluationsonar and imagingtopside weldingunderwater concrete placementunderwater constructionunderwater weldingutility locating

Enviro-Tech Diving, Inc. (ETD) is a veteran-founded commercial diving company based in Seattle, WA, serving the Pacific Northwest including Alaska, Washington, Oregon, Idaho, and California. Founded in 1990 by Tim Jewell and incorporated in 1991, the company provides underwater construction, inspections, environmental services, marine salvage, and ROV operations for marine, government, and industrial clients.

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anode installationcommercial divingdrone surveysenvironmental monitoringnondestructive testing (UTT)pile repairpipeline installationROV operationsunderwater coating applicationunderwater demolitionunderwater welding and cutting