Grand Avenue over Des Moines River Bridge
The Grand Avenue Bridge was constructed in 1918 and last rehabilitated in 1968. The structurally deficient, scour-critical bridge has experienced an increase in the rate and the magnitude of deterioration over the years. Components of the bridge are severely deteriorated, resulting in significant concrete spalling, cracking, and delamination. The existing bridge has been completely removed and replaced.
The new bridge will be a 446 ft., four-span, concrete beam bridge with concrete stem piers and semi-integral abutments, all with driven steel piling into bedrock. The new bridge will have one less river pier than the existing bridge and will improve the bridge river hydraulics. The bridge will support two lanes of traffic (1-WB, 1-EB), separated bicycle lanes, and parking on both sides of the bridge. The bridge sidewalks will be widened to 14 ft. on both sides. The bridge will feature a painted metal aesthetic panels on the exterior of the bridge to hide the bridge beams. These panels will be uniquely bent to create a sweeping arch look across each span. LED accent lighting will be incorporated behind the panels and are featured on the bridge railing. New LED street lighting is also added.
The bridge is currently OPEN to vehicular traffic. Currently, only the south bridge sidewalk is open. The north bridge sidewalk remains closed as well as all of the parking remains closed while the bridge remains under construction. The Principal Riverwalk Trails on the west side of the river also remain closed. Work will continue through the winter and the remaining work will be completed in the spring. The bridge will be fully complete in the summer of 2018.
Bridge utility relocation work is ongoing/underway
June 2016 - IDOT Bidding
July 11, 2016 - City Council approves Construction Contract
September 2016 - Anticipated Construction Start
September 19, 2016 – Grand Avenue Bridge and Riverwalk Trails adjacent to bridge closed
December 2017 – Grand Avenue Bridge open to traffic (1-lane each direction)
Summer 2018 – Project Complete
Cramer & Associates, Inc.
3100 SW Brookside Drive
Grimes, Iowa 50111
Please contact us by email or call 515-283-4920.