Flossmoor IL Homepage
Search

Flossmoor Road Viaduct Drainage Improvements/ Heather Hill Elementary Detention Basin

The Village continues to experience street and building flooding problems at the Flossmoor Road viaduct under the Metra/CN railroads. The viaduct floods, causing road closures and flooding of adjacent building structures. This viaduct is the main access point between the west and east sides of the Village. When the viaduct is closed, motorists and emergency response vehicles cannot travel to the east side of the Village. In 2020, the Village contracted with Baxter & Woodman Consulting Engineers to expand on previous studies and develop a solution to this decades old flooding problem. Total grant money that has been secured for this project totals $3.9 million.

Phase 1: Berry Lane Drainage Project

The first phase of the recommended improvements was the Berry Lane Drainage Improvements Project, that was substantially completed in fall 2022. 

Phase 2: Heather Hill Detention Basin 

The second phase of the project includes the construction of a large-scale storm sewer that will run from the Flossmoor Road Viaduct, south on Sterling Avenue to Maryland Avenue, then south on Lawrence Crescent to the Heather Hill Elementary School site into a naturalized detention basin. The basin portion of the overall project was bid for in May 2024, with construction occurring over the summer and final completion of restoration in late summer/early fall 2024. 

Phase 3: Lawrence Crescent Storm Sewer

This phase includes the installation of a large-scale storm sewer on Lawrence Crescent, from the newly constructed Heather Hill Elementary School Detention Basin to Maryland Avenue. The project — led by contractor Airy’s, Inc. with construction engineering by Baxter & Woodman — began in June 2025, with substantial completion by Aug. 15, 2025. Final completion — including restoration work — is planned by for Oct. 31, 2025. 

Phase 4: Sterling Avenue: Maryland Avenue to Hawthorne Lane

This phase includes the storm sewer installation on Sterling Avenue from Maryland Avenue north approximately 500 feet. Work on this phase is expected in 2026.

Phase 5: Sterling Avenue: Hawthorne Lane to Flossmoor Road Viaduct

The last and final phase of this project is Phase 5, which includes the remaining storm sewer installation on Sterling Avenue to the viaduct. Work on this phase is expected in 2026. 

Slide1


Drone view of storm sewer installation on Lawrence Crescent

Overhead view of the final sections of the large-scale storm sewer being installed on Lawrence Crescent — July 10, 2025

See more drone footage at: https://vimeo.com/1100299681/10c948c76e

Government Websites by CivicPlus®
Arrow Left Arrow Right
Slideshow Left Arrow Slideshow Right Arrow