This part of Irondequoit Bay (east side) gets cut off from the west side of the bay every summer (starting in May) when the Corps of Engineers shifts the Irondequoit Bay Outlet bridge from its winter position to its summer position.
This positional switch moves the bridge 90-degrees from its winter position. During the winter cars can cross the bridge and no boats can get out of the bay. During the summer, the boats are allowed to leave the bay and enter Lake Ontario but it means the cars can no longer cross the bridge; until early November.
Sounds kind of stupid? In my opinion it is. But in the great wisdom of the city of Rochester, this is the solution for best economic growth of the bay area!!!