Agnes’ historic rainfall taught watershed a concrete lesson

Tropical Storm Agnes, the great and hurtful deluge that struck Chesapeake Bay 40 years ago in June, was the magnitude of storm that only strikes every two or three centuries on average—maybe even a 500-year storm.
But from the Bay’s standpoint it was arguably unique; nothing else like it in the thousands of years the estuary has existed. To this day, significant parts of the Chesapeake ecosystem have not regained their pre-Agnes health, writes longtime environmental reporter Tom Horton.

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