NW 70th Avenue Improvements


Phase I construction is complete. Phase II construction on NW 70th Avenue will begin in the Spring of 2018.
Click on this link to watch a video on the correct way to drive through a roundabout.  Click here (PDF) to view the presentation given at the public meeting on March 3, 2016.

Click here to see overall map and plans for NW 70th Avenue (PDF)


Phase I


NW 98th Street to NW 107th Street

Estimated Cost


$7,361,434.50

Status


Complete

Contractor for Upcoming Roadway Improvements


Alliance Construction of Grimes, Iowa

Engineer


Foth Infrastructure & Environment, LLC

City Staff Project Contact


Matt Greiner, Public Works Director, 515.278.0822

Phase II


NW 86th Street to Peckham Street, bid in October of 2017 and constructed in 2017 and 2018. The road will be closed to through traffic during construction.

Estimated Cost


Currently being determined.

Estimated Start Date


Fall 2017

Estimated Completion Date


Fall 2018

Contractor


Yet to be determined

Engineer


Foth Infrastructure & Environment, LLC

City Staff Project Contact


Matt Greiner, Public Works Director, 515.278.0822

Project Status


Preliminary design phase

Phase III


Between Peckham Street and NW 98th Street after completion of Phase II. 

Estimated Cost


Currently being determined.

Estimated Start Date


After completion of Phase II

Estimated Completion Date


Undetermined

Contractor


Yet to be determined

Engineer


Foth Infrastructure & Environment, LLC

City Staff Project Contact


Matt Greiner, Public Works Director, 515.278.0822

Project Status


Preliminary design phase

There will be no property owner assessments as part of Johnston’s project. A thorough traffic study of the corridor was performed and concluded that a series of three roundabouts handles existing traffic and future increases in traffic.

Click here to learn more about roundabouts and why they're being chosen as the safest method for intersection control on some Johnston streets.

Current traffic on NW 70th Ave is 13,000 vehicles per day. By 2035, traffic is projected to grow to 20,000-26,000 vehicles per day. The proposed design accounts for this increase and concludes that acceptable levels of service will be maintained through 2035.

The impetus for the entire project is to be ready for the high school that will be built nearby and to address current and future traffic as the area continues to develop. This project will no doubt be a significant project for the City of Johnston. We couldn't do it without your input and patience.

We want to keep you informed every step of the way, so we are building an e-mail database. Your e-mail will not be shared with anyone. If you would like to get on the list, please e-mail us here.

We encourage you to also "like" the City of Johnston Government Facebook page and also follow us on Twitter @cityofjohnston. We will provide frequent updates there and here on our website.

If you ever have any questions about the improvements, please feel free to contact Public Works Director Matt Greiner.