Section 3 is a 14-mile stretch of I-70 in central Missouri from Route 5 (mm 99) to the Rocheport exit (mm 115). Most of the five interchanges along this section of I-70 are heavily developed with community- and travel-related businesses.
Boonville, population 7,960, lies north of the interstate. The city abuts the Missouri River and includes an active port and casino. I-70 crosses the Missouri River west of the Rocheport exit, and the recreational Katy Trail and historic Lewis and Clark Trail also converge near this crossing.
Begin: Boonville, West of Route 5, mm 99
End: Rocheport, East of Route BB, mm 115
Length: 14 miles
Study: Environmental Assessment (EA)
The town of Rocheport, population 255, is just north of I-70 and features a winery, several bed and breakfasts, and antique, art and trail-related businesses. The Big Muddy National Wildlife Refuge and Overton Bottoms are significant environmental features of this section, as are the cave systems, river habitat and geology.
As they prepare the environmental assessment document, the Section 3 team will work with the local citizens and officials to address issues of long-range land-use, access, safety and circulation.
Public Comment Period - CLOSED
Please leave comments you have regarding the re-evaluation of SIU 3 and the Katy Trail Bridge over I-70. The original impacts at mile marker 100 were described as a removal and replacement of the bridge on the Katy Trail over I-70, requiring a temporary closure of the structure and a detour via U.S. Route 40, Dunkles Drive and Prairie Lick Road. With the current design, MoDOT is anticipating similar bridge reconstruction impacts to the original 2005 EA, but the impacts to right of way on the Katy Trail will be reduced from the previous analysis. The comment period will be open until 11:59 p.m. on Thursday, Sept. 12, 2024.
Draft Environmental Assessment
- Improve I-70 Section 3 Cover, Table of Contents, Summary (2MB)
- Improve I-70 Section 3 Projection Description & Purpose and Need (857k)
- Improve I-70 Section 3 Project Alternatives (6.6MB)
- Improve I-70 Section 3 Affected Environment & Environmental Consequences (Maps) (2.8MB)
- Improve I-70 Section 3 Figures III-2A through III-2M (Maps) (8.4MB)