|Jozef Bernatak posted|
Reversing the flow of the Chicago River kept the sewage that drains into the North Branch out of the lake, but it did not keep the sewage that drained into the lake out of the lake. So the sanitary district built intercepting sewers along the lake front from 1900-07 to carry the sewage to this pumping station which dumped it into the North Branch. (The Chicago River An illustrated History and Guide to the River and Its Waterways, 2nd Edition, 2006, David M. Solzman, p.75)
After the North Side Water Reclamation Plant was built, it pumps the lake side sewage into an interceptor sewer that feeds the WRP.
(For future reference, I have come across "Racine Pumping Plant" and "pumping station at 68th near South Shore Drive." While Googling for them, I found a map of Chicago's supply water pumping stations. This looks like the Racine Pumping Plant. I didn't find anything around 68th and South Shore. I wonder if TARP makes all of these pumping stations obsolete.)
Update: this intercepting sewer would be later than the one feeding this plant when they started cleaning up the Calumet River/Lake area.
Workers pause for a portrait during construction of the Calumet Intercepting Sewer in #Chicago on February 26, 1924.
A completed section of intercepting sewer in an unknown location, with scaffolding below a manhole shaft and an electric locomotive with muck cars on September 11, 1928
A view of the bottom of a drop shaft during construction of the North Side intercepting sewer on September 6, 1924