A grade-separated interchange with roundabouts replaced a major at-grade intersection in a Minneapolis suburb. Dewatering contaminated soil required pumping 100 million gallons of water through a filtering system. Most dewatering occurred in winter, and keeping the pumps, hoses and filtering system operational was extremely challenging. The column-supported embankment also needed an automated instrumentation and monitoring system to track real-time performance of the embankment.

Highway 7/Louisiana Avenue Interchange
St. Louis Park, Minn.

Key Players

Owner City of Saint Louis Park

Lead Design Firm Short Elliott Hendrickson Inc.

Contractor C.S. McCrossan

Structural Engineer Short Elliott Hendrickson Inc.