Counties Impacted
Route Impacted

Project Progress

Design phase

The Missouri Department of Transportation worked with consultant company Benesch to design a new bridge at the Grand River Overflow on Chariton County Route 139 near Sumner.

Contractors bid on the project

The project was part of MoDOT's Aug. 21, 2020 bid letting where contractors were able to submit competitive bids on construction projects.

Contract awarded

The Missouri Highways and Transportation Commission awarded a $1,434,099.25 contract to Boone Construction Co. at their Sept. 2, 2020 meeting.

Construction begins and road closure

The contract states the contractor may begin work as early as Oct. 15, 2020. The contractor closed the road to all traffic on Dec. 7, 2020.

The bridge construction began and a significant amount of dirt was placed at the site. Construction was paused to allow this dirt to settle and compact before construction on the new bridge can continue. Construction is set to resume May 17, 2021.

The planned, signed detour routes are noted below.

Road reopening

The road reopened to all traffic on Friday, Aug. 6, 2021

Not Started
Project complete

By contract, the contractor must have all construction complete on or before Dec. 1, 2021.

Chariton County Route 139 Grand River Overflow Bridge south profile

Old Bridge

- Structurally deficient

- 24-feet wide

- Two 10-foot lanes

Plans for the new Grand River Overflow Bridge on Chariton County Route 139

New Bridge

- Meets current standards

- 28-feet wide

- Two 12-foot lanes

Planned Detour Routes

Frequently Asked Questions


Q. Why is MoDOT closing the road during construction?

A. Closing the road during the bridge replacement saves taxpayer money by allowing the contractor to work more efficiently. This will result in a shorter construction period.


Q. How long will the road be closed?

The road is scheduled to reopen in early to mid-August 2021. By contract, the contractor has 210 calendar days in which to complete the work.


Q. What is the planned detour?

There are two signed detours:

  • North: Route 139 to Route H to U.S. Route 65 to U.S. Route 36 to Route 5 to Route 139
  • South: Route 139 to U.S. Route 24 to Route 11 to Route CC to Route E to Route 139
  • See both routes above


Q. Why not build a bypass?

Based on the cost/benefit ration, building a bypass would not be a prudent use of taxpayer funds. A bypass could also have negative impacts and disruption to private property.


Q. Who can I contact if I have further questions?

A. Questions about the project may be directed to MoDOT Customer Service at 888 ASK MODOT (1-888-275-6636).


Q. How can I stay updated on the project's progress?

A. Sign up for project-specific updates using the form below.


  • Chariton County Route 139 bridge replacement project update


    St. Joseph, Mo. – Those living near or driving by the Grand River Overflow Bridge on Chariton County Route 139 have not seen activity at the site for some time, but there is a good reason. The bridge construction required significant amounts of dirt...

  • Chariton County bridge replacement project to begin soon


    SUMNER, Mo. – The Grand River Overflow Bridge on Chariton County Route 139 will close soon for replacement. The Missouri Department of Transportation contracted with Boone Construction Co. to replace the structurally deficient 57-year-old bridge...

For more information about this or other MoDOT projects, please contact our 24-hour Customer Service line at 888 ASK MODOT (1-888-275-6636).