I-270 North Design-Build

St. Louis, Missouri

Project Owner



STEM Program Opportunities

Millstone Weber’s I-270 North STEM Initiative seeks to mentor, educate, and support students attending identified St. Louis North County High Schools. It is designed to create an interest in the pursuit of heavy design, engineering, and construction careers. Click here for more information on these programs and events.

Interested in joining Project PAVE? Click here!

For more information on the I-270 Project, visit http://www.i270north.org/.


Project Overview

Project Update | September 10, 2020

Crews continue placing fill at the new Lindbergh interchange.  MSE walls and bridge abutments are also being constructed for NB 67.  The Washington/Elizabeth bridge came down the weekend of August 28th.  Crews have now started prepping for MSE wall construction and drilled shafts in the median of 270.  Old Halls Ferry is getting close to opening.  Crews are slipping bridge barrier, installing fencing and lighting.  The intersection of Old Halls Ferry and Pershall was closed this week in order to reconstruct the intersection.  When it is complete in 14 days, Old Halls Ferry will reopen to traffic.  The new roundabout at Bellefontaine has started.  The new exit ramp has been paved and the 75 closure of the existing WB on ramp has started as crews remove the existing Dunn/WB exit ramp intersection and start construction on the new roundabout.

Old Halls Ferry

The 60 year old Old Halls Ferry bridge over I-270 was removed this weekend. MW has 100 days to get the new structure reconstructed and Old Halls Ferry back open. Work starts right away with new MSE walls going in at the abutments and work starts in the median with drilled shafts. The new bridge will be 2 lanes wider and have a dedicated 5’ wide sidewalk on one side and a 8’ wide shared use path on the other side.

Virtual Meeting for DBEs to be held Friday, June 12, 2020

MW is committed to the success, development, and growth of Disadvantaged Business Enterprises (DBEs) in professional services and construction. We are committed to meeting the DBE goal of 22 percent for professional services and is on track to meet and exceed the DBE goal of 18 percent for construction services.

We actively supports and encourages the participation of DBEs in the highway construction industry. We seek to preserve our reputation of DBE program excellence by maximizing DBE participation throughout a project. All quotations will be treated fairly and confidentially.

Join Us! The I-270 North Design Build Project Team is hosting a Virtual Meeting for DBEs to learn about construction and construction-related opportunities.

Click here to learn more and register!

The work begins

On April 20, 2020 we closed the Washington / Elizabeth exit ramp. Crews set temporary barrier wall to close off the ramp and have begun installing new pipe and drainage structures. They will continue with removing existing ramp pavement, guardrail, lighting, etc to prepare for the upcoming retaining walls, bridge work, and new Pershall road pavement.

MoDOT Cancels Open House Public Meeting for Interstate 270 North, Hosts Virtual Public

The Missouri Department of Transportation (MoDOT) today announced that it has canceled its previously scheduled open house public hearing for the I-270 North Project. The meeting was to be held today from 4-8 p.m. at St. Louis Community College-Florissant Valley.

The meeting was canceled due to growing health concerns surrounding the coronavirus. MoDOT is committed to making information available to the public so it is hosting a virtual public meeting beginning at 4 p.m. today, on its project website at:  http://www.i270north.orgThe public will be able to obtain current information on the project and offer comments. All displays and information also will be available on the website by 4 p.m.

MoDOT will hold a Public Hearing on Thursday, March 12, 2020

Notice is hereby given to all interested persons that a public hearing will be held at:

St. Louis Community College — Florissant Valley
Student Center Multipurpose Room
3400 Pershall Road, St. Louis, MO 63135

Public Meetings and Hearings are a way for the I-270 North Design-Build team to keep community members informed about the project and obtain their feedback. The meetings are held in a publicly accessible location and set-up in an open house format. Stations providing information are available for viewing and project team members are on site to answer any questions. All members of the public are welcome and invited to the meetings including residents, business owners, elected officials, and other interested persons.

For more information visit http://www.i270north.org/outreach/.


On November 6, 2019 Millstone Weber, LLC in association with Parsons Transportation were officially awarded the I-270 North Design-Build Project.

We did it. After several months of countless day-long meetings, constant re-reading and revising, designing and redesigning, weekends in the office, nights on conference calls, and mountains of Jimmy John’s sandwiches….we did it.

We are proud. We are humbled. We are ready.

For now we are finalizing plans and designs, and construction will begin in 2020. This page will be updated with all things I-270, as well as an arm of MoDOT’s website which will be dedicated to this project (link to the left, or above if you’re on your phone). Keep this URL bookmarked. We can’t wait for you to join us on this journey.

If you are looking to get into construction or are currently in construction, we want you to join us on the ground. Click here to be directed to our Careers page and apply today so we can get you started! Field Engineers are specifically in high demand, and this four-year long project will require a crew made up of a multitude of skill levels and skill sets. If you have been in the industry for decades or may only just be starting, we have a home for you. So come talk to us. We don’t bite; we only build!

We’ll see you soon.