Two major employers along Chesterfield Parkway West will put up a combined $3 million toward the long-planned Swingley Ridge Road extension to North Outer 40, after City Council unanimously approved funding agreements with both companies on April 21.

Bayer Research and Development Services LLC and Reinsurance Group of America each agreed to contribute $1.5 million by June 30, 2027. The money will go into a restricted fund used solely for the road project, which is estimated to cost more than $16 million based on completed preliminary design documents.

The 8-0 vote on Bill No. 3585, which became Ordinance No. 3376, came after a first reading in March. Councilmembers Koch, Mastorakos, Budoor, Moll, Hansen, Tocco, McGuinness, and Moore all voted in favor.

City Administrator Mike Geisel said the contributions are tied to specific zoning obligations. "Specific parcels of land have unique zoning obligations associated with the proposed road project and the entities who own those specific parcels of land have agreed to cooperate and contribute financially to the construction of the project," Geisel said.

Bayer's obligation stems from the rezoning of approximately 200 acres on the north side of Chesterfield Parkway West, the former Monsanto campus. Under those zoning conditions, the Swingley Ridge connection to North Outer 40 must be completed before any development exceeding 2.66 million square feet can be occupied.

RGA's contribution is linked to 7.4 acres at 16600 Swingley Ridge Road, at the northeast corner of Chesterfield Parkway West and Hilltown Village Center. Office development exceeding 405,000 square feet for one building group there requires modification of the westbound I-64 on-ramp in line with the city's outer road extension plan.

The project extends North Outer 40 across Bonhomme Creek to Chesterfield Parkway West via Swingley Ridge Road. According to city planning estimates, the extension is expected to reduce crashes by 10% through increased local road connectivity and traffic diverted off I-64. It would also provide secondary access to the entertainment district and improved emergency access.

The $3 million in private contributions covers a fraction of the total cost. The city has applied for federal Surface Transportation Program grants through East-West Gateway, though the status of that application has not been announced. As of a November 2025 city finance presentation, TIF funds earmarked for the project were "currently obligated and unavailable."

No construction start date or groundbreaking timeline has been publicly announced.