Bridges to Prosperity McNary Bergeron

PROJECT HIGHLIGHTS: CROSSTOWN PROJECT

The I-35W/Crosstown Commons Area is heavily congested, has high crash rates and requires weaving between lanes. After several years of design setbacks due to unacceptable traffic closure periods, the Minnesota DOT pursued precast segmental alternatives in order to minimize erection times and traffic closures. Closures for major movements during construction were estimated to be no longer than two months.

Our Role

McNary Bergeron & Associates provided construction engineering services, including integrated segment shop drawings, construction analysis, step-by-step erection procedures, falsework design, and geometry control.

Construction Method and Specifications

- Precast segmental bridges built using the balanced cantilever method with ground-based cranes
- Segments are constructed using the shortline precasting method
- Six segmental bridges with typical span lengths of 200 ft
- Deck widths ranging from 33'-4" to 45'-4"

Owner

Minnesota Department of Transportation

Contractor

Ames / Lunda / Schafer (Joint Venture)

Designer

PB / Parsons / URS

Total Contract Value

$288 million

Timeline

June 2007 to November 2009

Data Sheet (pdf)

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