dec 31, 2018 - MDA discharges, on average, ~0.7 tons/day of sediment to Onondaga Creek. During a fairly dry summer, extensive maintenance work occurs at the MDA and Rogue areas—digging of a ‘“moat” around the MDA, excavation of the entire Rouge impoundment area, and redevelopment of five depressurizing wells. Well redevelopment efforts gain little increase in flows, but sediment concentrations leaving the MDA and Rogue areas do fall in relation to the successful dredging activities.