Aerial views of the Fairfax Bridge over the Carbon River near Wilkeson, WA. The Fairfax Bridge (formerly known as the O'Farrell Bridge) is a steel-lattice three-hinged arch bridge spanning the Carbon River on State Route 165 in Pierce County, Washington. Previous to the construction of the bridge in 1921, the only route south to the area around Fairfax was by train. At a total cost of $80,000, the bridge's deck sits 250 feet (76 m) above the river. Being a single-lane bridge, vehicles must yield