The original Grand Avenue Bridge
The Grand Avenue Bridge spanning the Des Moines River serves as a major link between the downtown Des Moines business district and East Village. Approximately 7,600 vehicles utilize it each day, making it one of the area’s busiest bridges.
Originally built in 1918 and last rehabilitated in 1968, the bridge was 441-feet long, 66-feet wide with 8-foot wide sidewalks on each side. It was a reinforced concrete arch bridge, which became structurally deficient and severely deteriorated over time.
Construction of a new four-span, 446-foot long, 54-feet wide pretensioned, prestressed concrete (PPC) beam bridge began in December 2016, following demolition of the previous structure.
It supports three lanes of traffic with a westbound bicycle lane and 14-foot wide sidewalks on both sides. A painted metal panel arch façade and LED accent lighting enhance its appearance.
Unique features and design challenges include:
The Iowa Department of Transportation (DOT) let the project, and all plan submittal dates were met. The engineer’s estimate of probable cost for the project was $8,612,304.00 with an estimated bridge cost of $7,749,615.00. The actual bid price for the project was $9,060,752.68 with an actual bridge bid cost of $8,379,396.23.
In November 2017, the bridge opened to one lane of vehicular traffic in each direction with pedestrian traffic on the south sidewalk. Substantial project completion is anticipated to continue during winter 2017/2018, and the project is slated to be fully complete in summer 2018.
Shuck-Britson and Snyder & Associates made the project possible by teaming to provide the following services:
In addition, the team also rapidly responded to issues that arose during construction, including pile driving inquiries and utility placement.
Click here for additional information from the City of Des Moines.