NW 70th Avenue Improvements


Phase I construction is complete. Phase II  and III construction on NW 70th Avenue will begin in the Spring of 2018. The estimated cost is $7,361,434.50. 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)

Project Update
The City of Johnston is beginning the design of the 3rd and final phase of the NW 70th Avenue Improvements. The intent of this project is to reconstruct 70th Avenue from 98th Street to approximately 600 feet west of Peckham Street in 2019.

The first public information meeting for this project will be held on Wednesday, February 21, 2018 from 6:30-8:00 p.m. in the Johnston City Hall Council Chambers, located at 6221 Merle Hay Road. The intent of this meeting is to provide an overall project update, present the preliminary project design and impacts for the corridor, and solicit input from surrounding properties on issues that may exist in the corridor.  The design team and representatives from the City will be present to listen and gather your input so that it may be incorporated into the design process. Click here to view the letter (PDF). 

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: $3,088,228.91

Estimated Start Date: Spring 2018

Estimated Completion Date: Fall 2018

Contractor: Concrete Technologies, Inc.

Engineer: Foth Infrastructure & Environment, LLC

City Staff Project Contact: Matt Greiner, Public Works Director, 515.278.0822

Project Status: Construction

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

Estimated Cost: Currently being determined.

Estimated Start Date: Spring 2019

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.