Clear Creek County
Henderson Mine Tunnel [Map] Tunnel through Red Mountain on Conveyor Belt (Formerly Henderson Mine Railroad)Open to private trafficBuilt 1976 Miner Street Bridge [Map · Street View] Reconstructed pony truss bridge over Clear Creek on Miner Street in Idaho SpringsOpen to trafficBuilt 1902 by Kuyes and Work. Reconstructed 1990 (the trusses are no longer load-bearing).
Tunnel No. 4 [Map · Street View] Abandoned tunnel on CO 119 near the junction with US 6Still intact, but boarded up after the roads were realigned to make this tunnel unnecessaryBuilt 1939