Big River Superfund Site, Missouri


As a nationwide prime contractor for EPA, HGL has incorporated climate change resiliency considerations into its sediment fate and transport analysis for the remedial strategy and remedy design for the Big River Superfund Site in Jefferson County, Missouri. HGL supported development of a conceptual site model (CSM) for remediating over 100 miles of river and floodplain contaminated with lead mine tailings, conducted field reconnaissance, and performed hydraulic and sediment transport modeling as well as a long-term geomorphic trends and climate resiliency analysis. HGL integrated natural processes into remedial alternatives and developed an adaptive management strategy for incremental remedial action under the SRR framework.

Perspective View of the Big River
Big River Resiliency Modeling Results