Ancho Erie Mine Road Bridge[Map] Timber stringer bridge over Poorman Creek Tributary Ravine on Ancho Erie Mine Road Open to traffic Built pre-1900 (bridge is resemblant of Gold Rush era timber stringer bridges), restricted to motorcycles and pedestrians only due to deteriorating condition 2011, repaired and reopened 2013
Bridgeport Covered Bridge 05-29-01[Map · Street View] Covered bridge over South Fork Yuba River on Pleasant Valley Road in South Yuba State Park Closed to all traffic as of October 21, 2011 Built 1862 by the Virginia Turnpike Co.; closed to traffic in 1973
Eagle Bird Mine Bridge[Map] Lost Bridge over South Yuba River on Maybert Road/Eagle Bird Mine Road Destroyed Built circa 1880, destroyed unknown year. Very little is known about this bridge, and only a pier still stands.
SP - Summit Tunnel[Map · Street View] Abandoned tunnel on former Central Pacific (later SP) Railroad Abandoned Built by the Central Pacific Railway as part of the original transcontinental railway to finally cross the Sierra's at Donner Pass
Spenceville Bridge[Map] Concrete closed-spandrel deck arch bridge over Dry Creek on Spenceville Road Open to pedestrians as part of trail. May be crossed by authorized vehicles. Built 1920, converted to pedestrian use unknown year.