Michael Helfrich, the York-based Lower Susquehanna riverkeeper, calls that flood the single biggest damaging event ever recorded in the Chesapeake Bay.
Even without a storm, danger looms. The reservoir is filling up with muck, and when it's full, far more mud and pollutants will wash into the bay.
Helfrich wants government and utility officials to remove the sediment behind the dam. But no one seems to want to take the lead in solving the problem.
Time is running out.
One man's crusade· In our story "Muckraker: Riverkeeper's crusade to save Chesapeake Bay from sediment," learn more about Helfrich's involvement with the river and his proposed solutions.
Behind the muck· Read "Where does the muck come from" to learn about York and Lancaster counties' role in the sediment problem at Conowingo.
Our opinion· The Daily Record/Sunday News editorial, Take action on sediment, suggests that this problem can no longer be ignored.