Zero Street Pump Station Site Remediation

Project Description

The City of Fort Smith, Arkansas needed to construct new sewage pump stations under a citywide wet weather flow management program. The program included constructing storage tanks at some stations to reduce peak, wet weather sewage flows by temporarily storing dilute sewage. The City acquired a former zinc smelter site adjacent to the existing Zero Street Pump Station to construct a larger pump station along with two 5 million-gallon storage tanks. The smelter had operated as late as the 1940s, and the site was contaminated with ash and slag from the stockpiling of zinc ore. The Arkansas Department of Environmental Quality had designated the site as a brownfield under the Arkansas Brownfields Program.

The City of Fort Smith selected Hawkins-Weir to prepare remediation plans and provide construction management services for removing soils containing high concentrations of zinc, lead, cadmium, arsenic and other metals. The project resulted in the removal and disposal of 77,000 tons of ash, slag, and contaminated soils; demolition of abandoned concrete and masonry smelter structures; and the regrading and restoration of the site.