Public Involvement Projects

Interstate 80 and 1st Avenue in Coralville, Johnson County

About the Project

Online meeting

Project description

The Iowa Department of Transportation is requesting public input for proposed improvements to Interstate 80 and right of way needs at the 1st Avenue interchange in Coralville, Johnson County. The proposed improvements include reconstruction of the interchange at Exit 242/1st Avenue in Coralville, on I-80, with a diverging diamond interchange (DDI). The project is anticipated to take place starting Fall 2022. The roadway and bridge work is expected to be completed after two construction seasons, with final trail, landscaping, erosion control, and other related work occurring in the 3rd year.

The project will utilize staged construction, including temporary pavement, so there will be limited brief closures with no planned large disruption of traffic on 1st Avenue or I-80.

View the online meeting (works best using Chrome):

View meeting

Please note, you will first need to register to view the online meeting. The online meeting allows you to watch the presentation at your own pace and at any time. The Iowa DOT is asking interested parties to take a few minutes to view the information and offer any feedback. If you do not have access to the internet, or need assistance viewing the materials, please contact the DOT representative listed below.

View a video on how to travel a diverging diamond interchange


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Project displays

Project displays

Proposed Trail
The 1st Avenue shared use path is located on the eastern edge of the City of Coralville starting north of Interstate 80 and running along 1st Avenue across the Interstate 80/1st Ave. Interchange. This trail is owned and operated by the City of Coralville and consists of a shared use path crossing Interstate 80 providing access to city trails. The proposed project will reconstruct the current trail along with a new pedestrian bridge. The existing trail will be removed, and construction of new trail may take one to two years to complete. During this time, there will be disruptions to the 1st Avenue shared use side path traffic across the interchange.

The 1st Avenue shared use path has been determined to be a Section 4(f) resource and the reconstruction of the trail across the interchange is expected to have a de minimis impact on the resource.

Section 4(f) of the U.S. Department of Transportation Act of 1966 was enacted as a means of protecting publicly owned parks, recreation areas, and wildlife/waterfowl refuges, as well as historic sites of local, state, or national significance from conversion to transportation uses. De minimis impacts are defined as those that, after consideration of any measure(s) to minimize harm (such as avoidance, minimization, mitigation, or enhancement measures), do not adversely affect the activities, features, and attributes of the Section 4(f) resource. The public is invited to review the impacts of the proposed interchange project on the protected activities, features, and attributes of the trail by contacting Michael Delp (see below).

Trails displays


Project contact
Catherine Cutler, transportation planner
Iowa DOT District 6 Office
5455 Kirkwood Blvd. SW
Cedar Rapids, Iowa 52404
Phone: 319-364-0235 or 800-866-4368
Email: [email protected]

Trail contact
Michael Delp, NEPA planner
Iowa DOT Location & Environment Bureau
800 Lincoln Way
Ames, Iowa 50010
Phone: 515-233-7973
Email: [email protected]

Deadline for receipt of comments is May 27, 2021,; however, all correspondence received after this date will be included in the project files and reviewed as the project is developed. To submit a comment online about this project, go to:

Iowa DOT ensures nondiscrimination and equal employment in all programs and activities under Title VI and Title VII of the Civil Rights Act of 1964 and other nondiscrimination statutes. Contact Iowa DOT Civil Rights at 515-239-1111 or [email protected] if you have questions or concerns.

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