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Columbia I-70 Bridges Project

The Columbia I-70 Bridges Project is an $18 million design-build project to replace the I-70 bridges over Business Loop 70/West Boulevard, Garth Avenue, and MO Route 763/Rangeline Street in Columbia, Mo.  Design-build is a project delivery method that combines both the design and construction phases into one contract to save time and resources.

Columbia I-70 Bridges Project map

Making Progress at Business Loop

Contractors have made a lot of progress on the Business Loop in just one week! See their progress in a little over a minute with this time-lapse video.


Traffic Impacts Week of June 27



  • There will be intermittent lane closures in both the eastbound and westbound lanes of I-70 from 8 p.m. to 5 a.m. Wednesday and Thursday for work at Garth Avenue and Range Line Street.  

Business Loop

  • Business Loop 70/West Boulevard, all on- and off-ramps at Interstate 70 and Business Loop/West Boulevard and the south outer road (I-70 Drive) remain closed to allow for replacing the I-70 bridge over the business loop and building a dual-lane roundabout on the south side of Business Loop 70. 
  • I-70 traffic is detoured onto the Business Loop ramps.
  • The new I-70 bridge at Business Loop will be slid into place on either June 27 or 28.
  • Here’s a time-lapse video showing how much work was completed at Business Loop in just the first week: Watch video

Business Loop Pedestrian Options

The City of Columbia’s Transit System will provide the following for the duration of the I-70 bridges project for sections that are impacting pedestrian crossings to bus stops on the Business Loop:

  • Shuttle service from the Parkade neighborhood to connect with either the #9 Purple Route, #8 Light Green and #2A or #2B Gold Routes. While the #9 is the only route that services this area of the Business loop, the city felt it was unnecessarily burdensome to have the customer transfer from a van to the #9 and then make transfers to the other two routes that connect with the #9.
  • The shuttle will be a scheduled ride and must be called into the city’s ParaTransit line 573-874-7290 by 5 p.m. a day in advance. The customer must state that they want to schedule a ride for the Parkade North Shuttle.
  • The customer will not be charged for the shuttle ride, but will be charged normal fare when they board one of the three bus routes.

View Construction Progress and Traffic Flow at Business Loop (south side)


View Construction Progress and Traffic Flow at Business Loop (north side) and Rangeline


Business Loop Roundabouts - North and South

business loop 70 roundabouts

Business Loop Roundabout - North

business loop roundabout north

Business Loop Roundabout - South

business loop roundabout - south

Phase 1 of 45-Day Closure

I-70 phase 2a

Phase 2 of 45-day Closure (Mid-June)

I-70 phase 2b

Printable Fact Sheet

fact sheet

Driving a Dual-Lane Roundabout

What is a Roundabout?

  • A roundabout is an intersection that accommodates traffic flow in one direction around a central circular island.  It is used as a form of intersection control, like traffic signals or stop signs.                                                

Why Roundabouts?

  • Roundabouts increase safety and improve traffic flow.
  • They allow for free flowing traffic with yield conditions that reduce crashes by as much as 75 percent.


Two Lane Roundabout Brochure

For an animated infographic on how to drive a roundabout click the link:

View the Garth Bridge Slide

Click on the image below to see a video showing how several of the Columbia I-70 bridges will be built and slid into place much like the I-44 bridge over the Gasconade River. Another version can be viewed HERE.

bridge move








Rangeline, Garth Pedestrian Detours

The sidewalks along Rangeline Street (Route 763) between Interstate 70 and Vandiver Drive in Columbia will remain closed for several months as construction takes place. Pedestrians and bicyclists are advised to detour around the closed sidewalks by taking Business Loop 70 to Providence Road to Vandiver Drive.

Pedestrians can also use Columbia’s public transit system, COMO Connect, to travel through the area. The Co-Mo Connect Black Connector has stops at Boone Electric Cooperative and Rangline on the south side of I-70 and at Rangeline and Vandiver on the north side of I-70.

The sidewalks along North Garth Avenue between U.S. Route 40 and Interstate 70 will remain closed until next summer as construction takes place. Pedestrians and bicyclists are advised to detour around the closed sidewalks by taking N. Providence Road to E. Texas Avenue.

Maps of Rangeline and Garth pedestrian detour routes, as well as the Black Connector route, are below.

Rangeline Pedestrian Detour Map Garth Ave. Pedestrian Detour Co-Mo Connect Black Connector Route
RangelinePedMap Garthy BusMapRangeline ped

Columbia I-70 Bridges Public Meeting Materials - July 16, 2015

Proposed interchange configurations

Proposed Interchange Configurations

Traffic flow phasing - Garth and Rangeline

Traffic Flow Phasing - Garth and Rangeline

Traffic Flow Phasing - Business Loop 70

Traffic Flow Phasing - Business Loop 70

Rangeline - before

Rangeline Interchange - Before (video animation)

Rangeline - after Rangeline Interchange - After (video animation)

Fact Sheet

Fact Sheet

I-70 bridges project need photo

Project Need

  • Built in 1957, the bridges carry an average of 80,000 vehicles a day.
  • Currently all are in poor condition, though safe for travel.
  • The bridge decks require continual maintenance.
  • The bridges would be very difficult to rehabilitate, which is why they are being replaced.

Project Goals

  • Deliver the project within program budget of $18 million.
  • Construct bridges on Interstate 70 at Bus Loop70/West Blvd., Garth Ave., and MO Route 763/Rangeline that provide long term service and will be compatible with future expansion.
  • Minimize traffic impacts while maximizing capacity and mobility for the area.
  • Maximize safety for the workers and commuters.
  • Complete the project by October 1, 2016.
  • Provide a project team that reflects the diversity of the community.

Project Timeline

  • Aggressive schedule will minimize traffic impacts
  • Construction will begin in late summer 2015.
  • Project to be completed in fall 2016.

Click here for a printable fact sheet on the Columbia I-70 Bridges Project.

News Releases

Business Loop 70/West Boulevard to Close Sunday for 45 Days - June 7, 2016

Reminder: Range Line Bridge Slide Set for Saturday - June 3, 2016

Range Line Bridge Slide Set for June 4 - May 31, 2016

MoDOT Offers Tips for Roundabout Driving - May 24, 2016

Traffic Switch to New Garth Avenue Bridge Set for Tuesday Night - May 23, 2016

New Bridge to Be Slid Into Place at Garth Avenue - May 13, 2016

20-Day Closure of Range Line Street Starts May 3 - April 29, 2016

Reminder: Creasy Springs to Close for 15 Days - April 21, 2016

Creasy Springs Closure Set for April 27 - April 15, 2016

Traffic Switch to Occur Thursday at I-70 and Garth - April 5, 2016

Lane Closures in Store for I-70, Range Line and Business Loop Next Week - March 25, 2016

I-70 Bridges Project Approaches Halfway Mark - March 17, 2016

Rangeline to Close for Several Hours Tuesday - Feb. 19, 2016

Meeting on Columbia I-70 Bridges Set for Feb. 23 - Feb.11, 2016

Reminder: Rangeline Reduced to One Lane in Each Direction Starting Monday - Feb. 5, 2016

Rangeline, Garth to Close for Two Days Next Week - Jan. 28, 2016

Rangeline, Garth Bridges to Come Down Next Week - Dec. 18, 2015

More I-70 Lane Switches Next Week - Dec. 11, 2015

Road Work Ahead: I-70 Lane Switches Coming Your Way - Dec. 2, 2015

Night Closures of I-70 to Continue - Oct. 30, 2015

Columbia Bridge Work to Close I-70 at Night - Oct. 13, 2015

One Lane of Rangeline to be Closed Next Week - Sept. 9, 2015

Construction of New I-70 Bridges Begins Today - Aug. 25,2015

Detour Established for Pedestrians on Rangeline - Aug. 20, 2015

One Week to Start of I-70 Bridge Replacement Project - Aug. 17, 2015

Work to Start Soon on I-70 Bridges - Aug. 5, 2015

Meeting on Columbia I-70 Bridges Set for July 16 - July 14, 2015

Survey Work to Begin on Columbia I-70 Bridges Project - July 2, 2015

Emery Sapp and Sons Selected to Design, Build Columbia Bridges - June 3, 2015

E-mail Updates

If you would like to receive detailed weekly e-mail updates on this project, please enter your e-mail address in the field below (e-mail updates set to begin the week of July 20):



Business Loop 70 West photoFor additional information regarding the Columbia I-70 Bridges Design-Build Project, please contact:

Emery Sapp and Sons Project Manager Chip Jones

Phone: 573-445-8331

Email: Chip.Jones@emerysapp.com


MoDOT Project Director Travis Koestner, P.E.

Phone: 573-751-3322

Email: Columbia.70@modot.mo.gov

For more information on design-build at MoDOT, visit http://www.modot.org/business/consultant_resources/DesignBuildInformation.htm.


Design-Build Team Procurement Details

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