On August 24, Tim Heath and I took a ramble down a drainage way from near his house on Old Middleton Rd. Tim is a retired biochemist who worked in the Pharmacy Dept. at the UW, Madison.
I'll call the waterway "Old Middleton Creek," because of the prairie and three settling ponds on City property on the west side of Old Middleton Rd.
The water was fairly clear, without any odor of sewage, and there wasn't much litter. But there was a lot of sediment washing in from surrounding roads.
A slide show of more photos here.
Photos of construction of settling pond.