Improve I-70 Second Tier studies included seven closely coordinated but independent studies. These seven studies analyzed the potential impacts of widening and reconstructing the interstate in seven distinct geographic areas. Breaking this phase of the improvement process into several smaller pieces allowed MoDOT to complete this stage more efficiently.
The following table identifies the boundaries of each of the seven sections of the I-70 corridor. Click on a number to view a listing of the communities and interchanges in that section. Visit the Local Focus page for more information on studies for each corridor section.Each of the seven studies considered how to widen and reconstruct I-70 while balancing environmental concerns and community needs. The studies also determined the basic location for I-70 widening. To see the map, click on "Widening Locations" to the right.
| Section Number | From | To | COMMUNITIES | Second Tier Study |
|---|---|---|---|---|
| 1 | KC Freeway System | Route 131 (Odessa) | Selsa Independence Blue Springs Grain Valley Oak Grove Bates City Odessa |
EA - Tier II Section 1 |
| 2 | Route 131 | Route 5 | Odessa Aullville Higginsville "Junction" Concordia Emma Sweet Springs Marshall Junction Ridge Prairie Chouteau Springs Lamine Lick Boonville |
EA - Tier II Section 2 |
| 3 | Route 5 (Booneville) | Route BB (Rocheport) | Boonville Overton Rocheport |
EA - Tier II Section 3 |
| 4 | Route BB | Route Z (East of Columbia) | Rocheport Columbia Prathersville Switzler Harg Shaw |
EIS - Tier II Section 4 |
| 5 | Route Z | US Route 54 | Lindbergh Millersburg Hereford Earl Eastville Kingdom City |
CE - Tier II Section 5 |
| 6 | US Route 54 (Kingdom City) | Route 19 (Montgomery City) | Kingdom City Calwood Williamsburg Mineola Danville Montgomery City |
EA - Tier II Section 6 |
| 7 | Route 19 | STL Freeway System (US Highway 40) | New Florence High Hill Jonesburg Pendelton Warrenton Truesdale Innsbrook Wright City Foristell Flint Hill Wentzville Josephville Lake St. Louis |
EIS - Tier II Section 7 |
Study Types Key:
Documented Categorical Exclusion (CE) Improvements to this corridor section will have no significant environmental impacts
Environmental Assessment (EA) - The degree of environmental impact caused by improvements to this corridor section is unknown. An EA will result in either a FONSI (Finding of No Significant Impact) or an EIS.
Environmental Impact Statement (EIS) - Improvements to this corridor section will have a significant environmental impact, requiring in-depth analysis and efforts to minimize those impacts