Monday 10:30 AM
Wet Weather 
[Presentation PDF]

Room: Emerald

A Study to Estimate Current and Future CSOs To Bubbly Creek and Identify Impacts on the Chicago Area Waterways, Chicago, Illinois

The South Fork of the South Branch of the Chicago River, colloquially referred to as "Bubbly Creek" is located entirely within the City of Chicago, Illinois, and is a component of the Chicago Area Waterways (CAWS). A once sluggishly flowing channel that drained an area of 5 square miles of wetlands has since been severely altered by human development. This project involved the development, calibration, and running of a variety of hydrologic and hydraulic models with water quality modeling capabilities, including USEPA's HSPF and SWMM models, PCSWMM, and the USACE's TNET tunnel model. The models were run for existing conditions and future conditions to predict CSOs to Bubbly Creek for various modes of operation for the Metropolitan Water Reclamation District of Greater Chicago's (MWRD) CSO control facilities - the Tunnels and Reservoir Plan (TARP). The modeling predicted CSOs entering the Creek from a variety of complex flow paths that are inherent in the interconnected combined sewer system in the City of Chicago. The results allowed the USACE to understand the overall effectiveness of the TARP system and provide data for use in predicting impacts on water quality in Bubbly Creek. In addition, the Bubbly Creek watershed is managed by several multi-jurisdictional agencies and is overseen by a variety of private and public interest groups. As such, the project required complex coordination with all project stakeholders and agencies.

Moderator:  Dan Small


Paul Shadrake - AECOM

Mr. Shadrake is a Senior Associate Environmental Engineer based in the Chicago, Illinois offices of AECOM.  He earned a BSCE from Cleveland State University and is a registered Professional Engineer in Illinois.  He has over 24 years of water resources and wet weather experience, including initial planning and modeling, facility design, permitting, and engineering services during construction.  He is currently a Senior Project Manager for a variety of water resource and wet weather projects for the United States Army Corps of Engineers, the Water Reclamation District of Greater Chicago, and other agencies and municipalities in Illinois.