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Transportation Improvement Projects

Current Projects:Planned Projects:
Completed Projects:

 


READ NEWS RELEASES for updates on projects that affect St. Peters roads.

  


CENTENNIAL GREENWAY PHASE 4

Cost: $1.03 million

Contractor: Millstone Weber Company

Scope: This project will replace the existing 6-foot-wide sidewalk with a 10-foot-wide concrete multi-use path with a 1-foot stamped concrete buffer along the north side of McClay Road, from McClay Village Drive to Hackmann Road.  The project will be the 4th phase of Great Rivers Greenway’s Centennial Greenway, which is a proposed 20-mile trail system intended to connect to Creve Coeur Park and the Katy Trail.  This project is eligible to receive 80 percent funding through a Transportation Alternatives Program reimbursement grant administered through the East-West Gateway Council of Governments and the Missouri Department of Transportation (MoDOT).

Currently: Construction is expected to begin in October 2021 and take about four months to complete.

Aldermanic Ward: 4

 

Centennial Greenway Phase 4 map

CLICK FOR CENTENNIAL GREENWAY PHASE 4 MAP PDF DOWNLOAD

 

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MID RIVERS MALL DRIVE RIGHT TURN LANE – Planned for 2023

Cost: $206,236

Contractor:

Scope: This project will install a right turn lane for northbound Mid Rivers Mall Drive at the Home Depot Plaza signalized intersection. The right turn lane will allow turning traffic to move out of the through lanes, which will reduce congestion and increase safety at the intersection. This project is eligible to receive 80 percent St. Charles County Road Board reimbursement funding.

Currently: Construction is expected to begin in 2023.

Aldermanic Ward: 4


DOWNLOAD A CONCEPTUAL MAP OF THE MID RIVERS MALL DRIVE RIGHT TURN LANE PROJECT (PDF)

 

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MO 370 INTERCHANGE RAMP 1 AT SALT RIVER ROAD – Planned for 2023

Cost: $3.09 million

Contractor:

Scope: This project includes the construction of Ramp 1 (of 3 total) that will connect eastbound Salt River Road with westbound/southbound MO 370 and I-70.  Ramp 1 will consist of a new 14-foot wide concrete ramp extending from the Spencer Road and Salt River Road entrance ramp to westbound/southbound MO 370.  The project includes the addition of an auxiliary lane on MO 370 between Ramp 1 and the Westbound I-70 ramp.  The bridge crossing at Premier Parkway will be widened with the project.  The project is eligible to receive 31 percent Federal reimbursement funding, 50 percent MoDOT Cost Share funding, and 16 percent St. Charles County Road Board reimbursement funding.

Currently: Construction is expected to begin in 2023.

Aldermanic Ward: 3

 

Highway 370 Interchange ramp 1 at Salt River Road

MO 370 Interchange Ramp 1 at Salt River Road Concept

 

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MO 370 INTERCHANGE RAMP 2/3 AT SALT RIVER ROAD – Planned for 2025

Cost: $12.6 million

Contractor:

Scope: This project includes the construction of Ramp 2/3 to connect eastbound/northbound MO 370 and I-70 with westbound Salt River Road.  Ramp 2 will consist of a 14 foot wide concrete ramp extending from eastbound MO 370 to the westbound exit ramp from MO 370/Salt River Road ramp to Spencer Road.  An auxiliary lane will be built on MO 370 between the westbound I-70 ramp and Ramp 2.  Three new bridges will be constructed with Ramp 2 over Premier Parkway, MO 370, and the MO 370/Salt River Road interchange ramp.  Ramp 3 will construct a new westbound exit ramp to Spencer Road.  The westbound entrance ramp from Spencer Road to Salt River Road will be widened to accommodate westbound traffic. The project is eligible to receive15 percent Federal reimbursement funding, 55 percent MoDOT Cost Share funding, and 24 percent St. Charles County Road Board reimbursement funding.

Currently: Construction is expected to begin in 2025.

Aldermanic Ward: 3

 

Highway 370 Interchange ramps 2 and 3 at Salt River Road

MO 370 Interchange Ramp 2/3 at Salt River Road Concept

 

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SPENCER ROAD RECONSTRUCTION – Planned for 2023

Cost: $1.65 million

Contractor:

Scope: This project will rebuild a one-mile stretch of Spencer Road south of Willott Road to the City of St. Peters boundary at Thoele Road.  This residential road is four decades old and failing.  The project will narrow the roadway to calm traffic, install roundabouts in place of three unwarranted stop signs, replace existing sidewalks with ADA-compliant sidewalks, and improve pedestrian safety.  This project is eligible to receive 80 percent Federal reimbursement funding and 16 percent St. Charles County Road Board reimbursement funding. LEARN MORE AND WATCH A VIDEO WITH INFORMATION ABOUT THIS PROJECT.

Currently: Construction is expected to begin in 2023.

Aldermanic Ward: 2 & 3

 

Spencer Road Reconstruction Project concept

Spencer Road Reconstruction Concept

 

Spencer Road Improvements Project area map 

 

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SPENCER ROAD EXTENSION WEST -- Completed June 2021

Estimated Cost: $2.4 million
Contractor: CRG
Engineer: Stock and Associates
Scope: This project extended Spencer Road north of the Salt River Road intersection to provide access to the new Amazon Delivery development at Premier 370 Business Park. The roadway extension is three lanes wide and includes new pavement, roadway lighting, open drainage, and traffic signal improvements. This project was eligible for 50 percent St. Charles County Road Board Economic Development funding, with the remaining 50% being funded by the developer. The project is expected to be the first and westernmost phase of a proposed roadway extension connecting Spencer Road from Salt River Road eastward to Lakeside Park Drive. This project reached substantial completion in June 2021.
Aldermanic Ward: 3

 

Spencer Road Extension West project and newly built Amazon Delivery
 

Spencer Road Extension West project complete in front of newly built Amazon Delivery building, August 2021

 

Spencer Road Extension West project facing Amazon Delivery
 

Spencer Road Extension West project complete with Amazon Delivery building in the background, August 2021

 


SPENCER ROAD & PREMIER PARKWAY INTERSECTION -- Completed June 2021

Estimated Cost: $536,270

Scope: This project constructed lane improvements and a traffic signal at the intersection of Spencer Road and Premier Parkway. The project also included the connection of the Spencer Road Trail on the levee to the Spencer Road and Premier Parkway intersection. The project was 80 percent funded by a St. Charles County Road Board grant.

Aldermanic Ward: 3

 

Spencer Road and Premier Parkway intersection project

Spencer Road and Premier Parkway intersection nears completion, May 2021

 

Spencer Road and Premier Parkway intersection improvements map 

 

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JUNGERMANN ROAD SAFETY IMPROVEMENTS - Completed in 2021

Cost: $172,511

Contractor: RV Wagner, Inc.

Engineer: City of St. Peters

Scope: This project improved the safety of the horizontal curve located on Jungermann Road between Sutters Mill Road and Garden Valley Drive with the installation of a high friction surface treatment.  The project also replaced the existing inlaid pavement markers on all longitudinal striping along Jungermann Road between Bartley Street and Willott Road.  Solar-powered push button activated flashing LED pedestrian crossing signs were installed at the mid-block pedestrian crossing on Jungermann Road at Garden Valley Drive.  This project was 80 percent funded through a St. Charles County Road Board grant.

Aldermanic Ward: 3

 

LED flashing beacon pedestrian crossing sign for Jungermann Road safety 

The new LED Rectangular Rapid Flashing Beacon pedestrian crossing sign seen above adds additional warning to drivers that there is a pedestrian within the roadway.  This is one of two signs located at the mid-block crosswalk on Jungermann Road at Garden Valley Drive.

 

High friction surface treatment for Jungermann Road safety 

The high-friction surface treatment on Jungermann Road from Sutters Mill Road to Garden Valley Drive provides increased friction for drivers to reduce wet road crashes.

 

Inlaid pavement marker for Jungermann Road Safety Improvements 

Pictured above is one of the inlaid pavement markers added to Jungermann Road to provide drivers with additional guidance of lane line locations, especially during night conditions.

 


PREMIER 370 BUSINESS PARK TRANSPORTATION IMPROVEMENTS - Completed in 2020

Estimated Cost: $2.23 million
Contractor: Duke
Completed: The project constructed lane and traffic signal improvements along Premier Parkway and Lakeside Park Drive. Six new traffic signals were installed, located at the Premier Parkway intersections of Executive Centre Parkway and Lakeside Park Drive, the Lakeside Park Drive intersections with the 370 Ramps, and at two of the four entrances to the Amazon fulfillment center at 4000 Premier Parkway. The project was 50 percent funded by a St. Charles County Economic Development reimbursement grant, with the remaining 50 percent by Duke Realty.

Aldermanic Ward: 1

 

Premier-370-Business-Park-Transportaton-Improvements-completed

Traffic signals at Amazon's fulfillment center on Premier Parkway

 

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JUNGERMANN ROAD BRIDGE REPLACEMENT - Completed in 2021

Estimated Cost: $2.9 million

Contractor: Pavement Solutions

Engineer: HR Green

Scope: This project replaced two existing deficient culverts on Jungermann Road between Country Creek Drive and Margaret Brown Court. The existing road elevation was also adjusted to mitigate flooding issues. In addition, improvements were made to the parks trail to improve safety and access for pedestrians and bikes. The project included an 11-foot wide trail along Jungermann Road, and constructed two trail crossings at Jungermann Road, one at the Country Creek Drive traffic signal and the other under the new bridge constructed just north of Country Creek Drive. This project received more than $1.346 million in reimbursement funding through the St. Charles County Road Board and East-West Gateway Council of Governments.

Currently: The project is substantially complete.

Aldermanic Wards: 3 & 4

 

Jungermann Road Bridge Replacement complete 

Located just north of Country Creek Drive, this Jungermann Road bridge includes an 11-foot-wide trail under the road.

 

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SALT RIVER ROAD & ARROWHEAD INDUSTRIAL BLVD. INTERSECTION IMPROVEMENTS - Completed in 2021

Cost: $1 million

Contractor: Krupp Construction

Engineer: Stock & Associates

Completed: This project improved the intersection and replaced a span wire traffic signal system. The new “Green-T” style intersection improved safety, reduces congestion due to truck and shift change traffic, and limits disruption of traffic along Salt River Road. Westbound travelers on Salt River Road are able to reach nearby Highway 79 without having to stop for the signal. This project received 80 percent of funding through a federal Congestion Mitigation and Air Quality (CMAQ) reimbursement program, administered by MODOT, and 16 percent of funding through a St. Charles County Road Board reimbursement program.

Aldermanic Ward: 1

 

Salt River Road and Arrowhead Industrial Boulevard intersection improvement 

Above, the new “Green-T” intersection with new medians and a new signal was completed in 2021. The photo was taken facing the intersection from the east side.

 

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MID RIVERS MALL DRIVE CORRIDOR IMPROVEMENTS - Completed in 2019

Estimated Cost: $2.35 million

Contractor: Gershenson

Engineer: Horner & Shifrin

Completed: This project improved safety and reduced congestion on Mid Rivers Mall Drive by constructing new dual left turn lanes on northbound Mid Rivers Mall Drive onto westbound Cottleville Parkway. The project also modified the existing traffic signals and provided ADA accessibility improvements. In addition, the project improved the safety of an existing multi-use pedestrian/bike trail that connects to the Great Rivers Greenway Dardenne Greenway trail. This project is 80 percent funded through a St. Charles County Road Board grant, with another $200,000 in federal funds for related trail improvements.


Mid Rivers Mall Drive Corridor Project, July 1, 2019 

 

Mid Rivers Mall Drive Corridor Project, July 1, 2019 

 

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McCLAY ROAD RESURFACING PHASE I - Completed in 2019


Cost: $1.23 million

Contractor: Pace Construction

Scope: This project replaced defective concrete slabs on McClay Road between Thoele Road and Jungermann Road and diamond ground the entire surface to improve smoothness. The asphalt pavement between Thoele and Shepherds Hill was resurfaced. Sidewalks were repaired where necessary and improved to meet current ADA standards. The project was 80 percent funded through a Federal Surface Transportation Improvement reimbursement grant administered through East-West Gateway Council of Governments and Missouri Department of Transportation (MoDOT).

Aldermanic Ward: 4


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MID RIVERS MALL DRIVE WIDENING - Completed in 2019

Cost: $1.661 million

Contractor: NB West

Engineer: George Butler & Associates

Scope: This project improved safety and reduced congestion on Mid Rivers Mall Drive at I-70 and north to Ecology Drive. A traffic lane was added on both southbound and northbound Mid Rivers Mall Drive across I-70 by removing portions of islands and made some traffic signal improvements at the interchange. Additional northbound and southbound lanes also were added on Mid Rivers Mall Drive from the I-70 North Outer Road to Ecology Drive. A traffic signal was removed and replaced at the North Outer Road intersection. Plus, the project modified the existing railroad crossing north of the outer road and provided for a multi-use pedestrian/bike trail on the west side of Mid Rivers Mall Drive. This project was 60 percent funded through a St. Charles County Road Board grant.

Aldermanic Ward: 1

 

2019-03-26-MRMD-RR-REOPENED-WEB

Mid Rivers Mall Drive reopened at the railroad crossing north of Interstate 70


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