The reservoir was constructed at the beginning of the 20th century. It was formed by impounding both the Muscoot River, a tributary of the Croton River, and the Croton River proper, a tributary of the Hudson River. Empounded water from the New Croton Reservoir flows through the New Croton Aqueduct into the Bronx for distribution in New York City.[3]
The reservoir was once much smaller, but the other side of the original dam was intentionally flooded to make the reservoir bigger, when[when?] a new dam was built downstream. The original dam is still standing, and divides the reservoir in two.[citation needed]
The reservoir serves as the first main collecting point for all the reservoirs in the Croton Watershed. It is almost 8 miles (13 km) long, can hold up to 4.9 billionUS gallons (19,000,000 cubic metres; 19 billion litres) of water at full capacity, and has a 76-square-mile (197 km2) drainage basin.[2]