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 will be completely removed and replaced.
The new bridge will be a 446 ft., four-span, concrete beam bridge with concrete stem piers and integral abutments, all with driven or drilled 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 three lanes of traffic (2-WB, 1-EB), a westbound bicycle lane, and curb parking on the south side only. The bridge sidewalks will be widened to 14 ft. on both sides. The bridge will feature a painted metal panel arch façade and will incorporate minor aesthetic lighting to enhance the new bridge.
The bridge will be closed to all traffic during construction and a detour route will be signed. In addition, there will be some trail and sidewalk closures on the west side at the Principal Riverwalk, which will also require a detour route.
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.