Conversation so far:
what is the total area of the chesapeake bay watershed
The Chesapeake Bay Watershed at 64,299 sq mi is the largest watershed of the Atlantic Seaboard of North America.
how many states does chesapeake bay cover
More than 150 major rivers and streams flow into the Bay's 64,299-square-mile drainage basin, which covers parts of six states and all of Washington, D.C.
how many miles long is chesapeake bay
Chesapeake Bay is approximately 200 miles long from its northern headwaters in the Susquehanna River to its outlet in the Atlantic Ocean.
how deep is chesapeake bay
Average depth is 21 feet, reaching a maximum of 174 feet.

Question: what is unique about the bay
Self-contained rewrite: what is unique about chesapeake bay