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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
US 6/40 Idaho Springs Bridge [Map · Street View] Steel stringer bridge over Clear Creek on CR 314 (former US 6 and US 40)Open to trafficBuilt 1936; US 6/40 rerounted onto I-70 in 1961; used briefly to carry EB I-70 during tunnel reconstruction 2015; repurposed to access trailhead parking