GSI and Maul Foster Alongi (MFA) conducted a remedial investigation and feasibility study (RI/FS) at an active marine shipyard near the mouth of the Columbia River. The effort required close collaboration with regulators and multiple participating parties at this high-priority deferred Superfund site.


The Astoria Marine Construction Company (AMCCO) is an active marine shipyard in Astoria, Oregon. Since 1924, the company has primarily constructed wooden boats and ships. During World War II and the Korean War, it built metal-armored boats and refurbished previously mothballed warships. This led to elevated concentrations of contaminants present in the soil and river sediments at and near the shipyard.

GSI’s Solution

To streamline the project and decision-making under an accelerated schedule, GSI worked closely with the Oregon Department of Environmental Quality (DEQ) and multiple participating parties, including four tribal governments, Oregon Fish & Wildlife Department, Oregon Division of State Land, Citizens Advisory Committee, and others. To date, we have completed the remedial investigation, human health and ecological risk assessments, and the feasibility study. DEQ proposed the selected Remedial Action for the site in May 2016, and we are currently preparing the remedial design and remedial action work plans, design documents, and regulatory permits for the implementing the cleanup.