The City of Wentzville presented four TIP applications to the St. Charles County Road Board on Wednesday, requesting county participation and coordination with MoDOT for several projects tied to the I‑70 reconstruction work.

Tony Gambaro, assistant director of engineering for the City of Wentzville, detailed the scope and preliminary funding splits for each project, saying the city is seeking county and MoDOT cost share for construction while the city will fund design work.

The Wentzville Parkway and Parkway Ridge intersection project would add dual left‑turn lanes in each direction, dedicated right turns, and new signals to address aging pavement and single‑lane turns; the total project estimate is about $3.9 million with developer contributions and MoDOT CMAQ funding requested. Gambaro said the city has asked property owners and developers to contribute roughly $1.1 million.

A proposed pedestrian bridge at the I‑70 interchange near Wynne Avenue would connect downtown to the Interstate Drive trail system and remove pedestrian conflicts at the I‑70/Route Z ramps. Gambaro said MoDOT will administer design and construction if the county and others provide funding, and the project team has a rough order of magnitude cost estimate from MoDOT.

Marley Drive extension would extend Marley beneath railroad tracks to tie into West Pearce and create a second grade‑separated crossing to improve downtown connectivity and hospital access. Wentzville plans to hand design/construction administration to MoDOT to coordinate with the I‑70 construction schedule.

Wilmer Road, a roughly one‑mile corridor, is proposed for resurfacing, shoulder additions for bicyclists, guardrail upgrades, sight‑distance corrections and rumble strips. Gambaro said the city received design funding from the county in 2022 and is seeking construction funding in this cycle after a recent federal application was not recommended.

Board members asked clarifying questions about signalization, sidewalks, and connections to planned hospital and downtown improvements. No votes were taken; staff said MoDOT partnership and federal funding decisions will influence final county commitments.