The George W. Kuhn Retention Treatment Basin, previously known as the “12 town drain” is the site of huge combined sewer discharges (when partially treated sewage and fully treated sewage are mixed and discharged during big rain events).
Willi G Gutmann’s Red Run WordPress site is the single most comprehensive source of information about the Red Run, Check out his writing here.
The A.W.E. Society 
Isn’t it nice how it’s disguised as a Golf Course and WaterPark on the Oakland County side, – but Macomb County has a HUGE open channel 8 mile long ditch ? – http://archive.lib.msu.edu/tic/golfd/article/1979sep14.pdf