 The remaining components of this Development are the Chicago Park Powerhouse Penstock, Chicago Park Powerhouse, and the Chicago Park Switchyard.This Development consists of an embankment dam on the Bear River known as Rollins Dam, Rollins Dam Spillway, and Rollins Reservoir, which has a surface area of 825 acres and 65,989 ac-ft of storage capacity.Rollins Reservoir also offers 332 camping site spread over 4 campgrounds.