Counties Impacted
Project Status
Planning Phase

Timeline for Environmental Work

Notice to Proceed
Sept. 7, 2022
Data Collection
Beginning of Fall 2022

specialists will collect samples and document resources

Public Involvement
Early 2023
Proposed Alternatives
Spring 2023

proposed alternatives will be developed and available for public review

Study of Natural and Cultural Resources
Spring 2023

anticipated completion summer 2023

Coordination with State and Federal Agencies
Late Summer & Fall 2023
Completion of Environmental Study
Late 2023

Community Briefing Materials for Dec. 8, 2022

US Route 412 in Dunklin County

Community Briefing Held Dec. 8, 2022

MoDOT held a community briefing from 4 to 6 p.m. Thursday, Dec. 8 to discuss the Environmental Study for U.S. Route 412 in Dunklin County. The meeting was held in the gym of Senath High School, located at 803 S. State St. in Senath, Missouri. 


Learn More


As a main east-west corridor in Missouri’s Bootheel, U.S. Route 412 carries more than 6,000 vehicles a day. Currently, the existing four-lane upgrades end near Cardwell, Missouri, and U.S. 412 returns to a two-lane road.   

To plan for future capacity improvements, the Missouri Department of Transportation is launching an Environmental Study. This 20-mile section of U.S. 412 extends from Route AC near the Arkansas border to just east of Route Y near Kennett, Missouri. The exact project limits for the project will be set once the Environmental Study is complete.

The study will examine options for increasing capacity, as well as the impact of those options. This is the first step in the eventual upgrade of U.S. 412 from two lanes (one lane in each direction) to four lanes (two lanes in each direction). 

The Environmental Study will begin the process of collecting data and gathering public input. These are the first steps in identifying potential project challenges, assessing needs along the corridor, and gauging public sentiment regarding improvements to U.S. 412. Natural and cultural resources such as wetlands, threatened and endangered species, wildlife and habitat, water quality, farmlands, historic properties, and archaeological sites will be identified so that impacts from potential roadway improvements can be analyzed.

Throughout the project, opportunities will be available for the public to provide input and review the project findings.

The Dunklin County Commission contributed $500,000 toward the completion of the environmental work. Although funding has not been secured for future construction on this corridor, it has been designated as an unfunded transportation need by the Bootheel Regional Planning Commission.

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Stay up-to-date on the next steps for U.S. Route 412 by signing up to receive email updates! To subscribe, click the link below and select the option for Route 412 under the Southeast District. 



Route 412 Corridor in Dunklin County for Environmental Study

For More Information

Contact Photo
Curt Woolsey
Curt Woolsey
Project Manager
Southeast District
Contact Info

(417) 469-6232