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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

Traffic Impacts Week of May 23

Columbia I-70 Bridge Project

  • Nighttime single lane closures of eastbound and westbound Interstate 70 expected Tuesday-Thursday due to construction of barrier curbs.

Garth Avenue

  • Traffic switch to the new Garth Avenue bridge will take place Tuesday (May 24)evening.
  • Work will require the westbound I-70 on ramp at Providence to be closed between 9 p.m. and 5 a.m.

Range Line Street

  • The new “dogbone” interchange at Range Line and I-70 opened Monday, May 23.
  • The interchange, sometimes called a double roundabout interchange, consists of two tear-shaped roundabouts that join together to form a single roundabout.
  • Drivers entering the roundabout are reminded they must yield to all traffic in the roundabout before entering. More information about roundabouts, including video animations showing both the old and new Range Line interchange, can be found below.

Business Loop/Creasy Springs

  • Motorists are asked to continue to use caution at Business Loop and I-70 as flagging operations will be necessary during daytime hours this week.  

Road Work Ahead

  • June 4 – The Range Line bridge slide is tentatively scheduled for the weekend of June 4.

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








View Construction Progress and Traffic Flow at Garth


View Construction Progress and Traffic Flow at Business Loop and Rangeline


What’s Happening at Business Loop?

  • Building a new I-70 bridge
  • Constructing two dual-lane roundabouts on the north and south sides of I-70 
  • Improving access to I-70 Drive SW
  • Decreasing traffic delays on Creasy Springs

How Will the Work Impact Traffic?

I-70 will remain open at all times except for a few temporary evening lane closures. Other closures:

  • West Blvd. - 45 days                           
  • Business Loop 70 - 45 days
  • South I-70 Outer Road - 30 days
  • Creasy Springs - 15 days

Click HERE for a timeline of traffic impacts and construction work.

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:

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.

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.

bridge move

Click here 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.






News Releases

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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