Paerdegat Basin is a channel that connects to Jamaica Bay on the southern end of Brooklyn, New York, United States. It is located on the west side of the Canarsie area. It connects to Jamaica Bay to the south, and the north end of the basin is adjacent to the intersection of Ralph Avenue and Flatlands Avenue. The retention facility prevents up to 50 million gallons of combined sewer overflows during heavy rain from being discharged into Paerdegat Basin, a 1.25 mile channel that is connected to Jamaica Bay.