Middle Branch covers 400 acres (1.6 km2), with an average depth of 31 feet (9.4 m), although some areas in the reservoir's southern extent reach 50 feet (15 m). It drains an area of 21 square miles (55 km2) reaching into Dutchess County. At full capacity, it holds 4.1 billion gallons (6.4 million m3).[2]
^Note that this is not identical with the New York City water supply system's "Croton Watershed". Numerous small natural lakes and ponds, as well as large Lake Mahopac, are part of the Croton River's watershed but not part of New York City’s supply system. A map of the actual Croton Watershed is found here.
