After joining with Black Brook, it then continues further south as the Rio Reservoir, closely followed on the east side by Plank Road.
The Mongaup River features three hydroelectric dams along its course, all owned by Eagle Creek Renewable Energy.
All three dams together produce about 60 million kilowatt hours of hydroelectric power, which goes to serve the citizens of New York.
[3] The Mongaup River Valley features a handful of restaurants, hotels, and attractions, making it popular for tourists who are visiting the area.
The reservoir has also been stocked with fish by a local nature agency, which makes it a popular destination for fishermen and boaters.