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Superfund Redevelopment Initiative

Superfund Sites in Reuse in Wyoming

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Mystery Bridge Rd/U.S. Highway 20

The 410-acre Mystery Bridge Rd/U.S. Highway 20 Superfund site includes residential and industrial areas in Evansville, Wyoming. Industrial activities began in 1923 and have continued until the present. Site activities contaminated soil and groundwater with solvents and oils. EPA added the site to the National Priorities List (NPL) in 1990. As part of the initial response actions, EPA immediately connected nearby residents to the municipal water supply. EPA worked with the responsible parties, Kinder Morgan Energy Partners, and the Dow Chemical Company and Dowell Schlumberger, Inc., to treat impacted soil and groundwater due to releases that occurred on each of their properties. Institutional controls restrict future activities on the former Kinder Morgan Energy Partners, and Dow Chemical Company and Dowell Schlumberger, Inc. portions of the site to industrial uses. In 2012, Tallgrass Energy Partners purchased the facilities from Kinder Morgan Energy Partners. Tallgrass Energy Partners continues to conduct natural gas processing activities on site. EPA removed the former Kinder Morgan Energy Partners portion of the site from the NPL in 2017. The Dow Chemical and Dowell Schlumberger property is currently used for equipment storage. The residential neighborhood on site, which includes about 40 homes, remains in continued use. A Burlington-Northern railroad right of way separates the industrial and residential areas of the site. The rail line is active.
Last updated September 2019

As of December 2019, EPA had data on one on-site business. This business employed 25 people and generated an estimated $170,905,172 in annual sales revenue. For additional information click here.

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