https://www.cincinnati.com/story/news/2019/06/08/what-fatberg-winton-lake-reopens-after-one-clogs-nearby-sewage-system/1391759001/

Winton Lake reopens after 'fatberg' clogs nearby sewage system, causing odor, discoloration

Winton Lake has been reopened effective Saturday to boating and fishing, about five days after odor and discoloration stained the area due to a nearby sewage overflow.

The overflow in Winton Woods was caused by a so-called fatberg, a large, solid blockage that forms inside a sewer system. This one was made of grease, wipes and other waste that wedged into spaces between tree roots, clogging the sewer. The fatberg was about 15 inches in diameter and 2 feet wide. 

Great Parks of Hamilton County announced that the Metropolitan Sewer District of Greater Cincinnati identified the source of the problem to a manhole north of the lake. Crews also discovered blockage in a second pipe.