 This reservoir has a surface area of 140 acres, and 2,037 ac-ft storage capacity.From here, the Chicago Park Conduit utilizes 21,700 feet of flumes and ditches to transport water to the Chicago Park Forebay Dam, an earthfill dam adjacent to the Bear River.The Chicago Park Forebay Dam Spillway allows water into Chicago Park Forebay, another reservoir adjacent to the Bear River with 7 acres of surface area and 117 ac-ft of storage capacity.