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Regional Project Information
Kempton Bridge & NW 66th Avenue Improvements - A Polk County project involving the city of Johnston.

Construction is underway. Expect and plan for construction delays in the area of the Des Moines River bridge until summer of 2016.

Phase I - The bridge over the Des Moines River and 1,000 feet in either direction will be reconstructed beginning the summer 2015 through the spring of 2016, the bridge will be open to traffic during construction. A temporary trail under the bridge will be open during the construction of the bridge.

Phase II - The reconstruction of NW 66th Avenue from the river bridge to the intersection of NW 66th Avenue and NW Beaver Drive will occur from spring 2016 through fall 2017. Traffic will be open during construction although the west leg of the intersection of NW 66 Avenue and NW Beaver Drive may be closed when it is being reconstructed. This phase of the project includes the construction of a recreation trail from the intersection of NW Beaver Drive and NW 66th Avenue to the Neal Smith Trail at the Sycamore Access

Phase III - The reconstruction of NW 66th Avenue from east of the bridge to NW 26th Street will occur from spring 2018 through fall 2019. The roadway will be open to traffic during construction.

Click here for the latest construction updates from Polk County.  An overview of the project is available here.

Beaver Drive Bridge Over Interstate 35/80 - An Iowa Department of Transportation project. 

Crews anticipate the bridge will be closed to traffic through late November/early December 2016. Click here for the latest information on this project.

If you have any questions regarding this project, please contact
Danielle Mulholland with the Iowa DOT.  She can be reached by phone at 515-986-2852 or by email at

To see a copy of the closure map click here.

NW 100th Street Bridge over Interstate 35/80 -  A city of Urbandale project. 

The project involves reconstruction of NW 100th Street from Plum Drive to north of the bridge. Construction is underway and will continue through the 2016 construction season. The road and bridge are closed to traffic during construction.  Click here to see the latest information on this project.

Intersection of NW 54th Avenue and NW 100th Street - A joint project between the cities of Johnston, Grimes and Urbandale.

The paving project on NW 100th Street near NW 54th Avenue is expected to open to traffic in late 2016. The project is progressing on schedule for the anticipated opening.

Click here for more information.