City Utilities to Drop River Levels02/21/2020 Fort Wayne river levels will be going down beginning Monday. It’s to clear the way for construction of a consolidation sewer pipe that will cross under the St. Marys River, just east of the Harrison Street Bridge. City Utilities says the big pipe will eventually connect to a drop shaft to the deep-rock tunnel on the south side of the river. The drop shaft will take combined sewage that would normally dump into the St. Mary’s river during rain events and convey it down to the deep-rock tunnel and on to the Water Pollution Control Plant where it will be treated. River levels will be down through the month of March and should return to normal levels by April 15th.