History of Tertiary Highway 804:
Tertiary Highway 804 is a forest access road in the Ear Falls area which provides a road connection from Highway 105 to the Lower Manitou Falls Hydro-Electric Dam. The Manitou Falls Road was first designated as Highway 804 in the early 1960s, which created Ontario's first Tertiary Highway. In August 1961, a Preliminary Assumption Plan was prepared by the Department of Highways of Ontario (DHO) which showed the planned assumption of the Manitou Falls Road as a new Tertiary Highway. The Preliminary Assumption Plan was registered on March 29, 1962, and the route was formally designated as Tertiary Highway 804 by an Order-in-Council dated April 25, 1962. The highway was only gravel-surfaced at first, but the entire route was paved in 1968. Highway 804 has since reverted back to a gravel-surfaced highway, although recent Ontario Official Road Maps still indicate that this road is paved. Highway 804 is maintained year-round. Unless posted otherwise, the speed limit on Highway 804 is 80 km/h (50 mph). There are no services available on this highway, but services are available on Highway 105 in nearby Ear Falls.