River North in Chicago in Cook County, Illinois — The American Midwest (Great Lakes)
Sidestream Elevated Pool Aeration Project
Photographed by Sean P. Flynn, October 18, 2023
1. Sidestream Elevated Pool Aeration Project Marker
1994
Sidestream Elevated Pool Aeration Project
Dedicated September 30, 1994
Erected by American Society of Civil Engineers.
Topics and series. This historical marker is listed in these topic lists: Bridges & Viaducts • Waterways & Vessels. In addition, it is included in the ASCE Civil Engineering Landmarks series list. A significant historical year for this entry is 1994.
Location. 41° 53.654′ N, 87° 37.506′ W. Marker is in Chicago, Illinois, in Cook County. It is in River North. It is on East Erie Street east of Rush Street. The marker is one of several next to the entrance to the headquarters of the Metropolitan Water Reclamation District of Greater Chicago. Touch for map. Marker is at or near this postal address: 100 East Erie Street, Chicago IL 60611, United States of America. Touch for directions.
Regionally, this marker is in the American Midwest and on the Great Lakes. Globally, it is in North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once the Viceroyalty of New France, the territory of the Mississippian Culture, and the Northwest Territory.
Other nearby markers. At least 8 other markers are within walking distance of this marker: Metropolitan Water Reclamation District of Greater Chicago's Wastewater System (here, next to this marker); The Metropolitan Sanitary District of Greater Chicago (here, next to this marker); Cyrus Hall McCormick (within shouting distance of this marker); McCormick Double House (within shouting distance of this marker);
this page online
Also see . . . Sidestream Elevated Pool Aeration (SEPA) Stations. The Metropolitan Water Reclamation District (MWRD) of Greater Chicago looks at the history and purpose of the sidestream elevated pools it erected in the 1990s.
Excerpt: "The MWRDs sidestream elevated pool aeration (SEPA) stations provide more than a captivating waterfall and attractive park for picnics and wedding photos. We built the SEPA stations along the Cal-Sag Channel and Calumet River to also aerate the water. This added oxygen improves the water quality and creates new life in the Chicago Area Waterway System (CAWS)."(Submitted on October 29, 2025, by Sean P. Flynn of Oak Park, Illinois.)
Photographed by Sean P. Flynn
2. HQ of Metropolitan Water Reclamation District of Greater Chicago
Several markers about landmarks dedicated by the American Society of Civil Engineers are affixed to the left of the main entrance.
Credits. This page was last revised on October 30, 2025. It was originally submitted on October 29, 2025, by Sean P. Flynn of Oak Park, Illinois. This page has been viewed 58 times since then and 18 times this year. Photos: 1, 2. submitted on October 29, 2025, by Sean P. Flynn of Oak Park, Illinois.
