Bridges to Prosperity McNary Bergeron

PROJECT HIGHLIGHTS: LOWRY AVENUE BRIDGE

Since the early 1900s, Lowry Avenue has been a significant transportation corridor and neighborhood connection in Minneapolis. Two prior structures connected the banks of the Mississippi River, one built in 1905 that remained in service for 51 years, and a second built in 1958 on the same piers. In 2004 it was discovered that one of the bridge piers had shifted. The old bridge was closed in April 2008, and Hennepin County and their partners evaluated how to replace the structure while providing improved traffic flow and pedestrian access.

The new Lowry Avenue Bridge is a 900-ft steel basket-handle arch bridge.

Our Role

McNary Bergeron & Associates is providing construction engineering services to Lunda Construction for this unique basket-handle arch bridge. Our services include:
-3D Time-Dependent Construction Analysis,
-Phased geometry control and erection procedures,
-Design of falsework and temporary works for backspans, mainspan and arch erection,
-Design of lifting beams & equipment for precast edge beam erection and arch rib lifting,
-2D and 3D integrated shop drawings and working drawings for footings, piers, and superstructure backspans and mainspan.

Construction Method and Specifications

-Steel Basket Handle Tied Arch Stay Cable
-Multi-cell concrete backspans cast on falsework
-Precast concrete mainspan edge girders and transverse deck beams
-900' long by 91' wide

Owner

Hennepin County Transportation Department

Contractor

Lunda Construction Co.

Designer

T.Y.Lin International & SRF Consulting

Construction Contract Value

$51.5 Million

Timeline

November 2009 - Summer 2012

Data Sheet (pdf)

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