Argo Tunnel, 2015 Looking into the Argo Tunnel at its Idaho Springs portal. I was hoping to see tracks and a steel door, but found a busy crew of environmental workers installing a pipe between the bulkhead and new water plant. Similar Images ...based on the tags: numbers, people, signs, tunnels... An outfall for 43rd Avenue Creek. Let’s rename it Substreet Creek; isn’t that a better name? Behind a nurse’s station. One of the underground creeks in Duluth, somewhere under the East Hillside neighborhood. The fantastic red elevator that is Pool #61, built 1928. Miners at the turn of the century had better taste in typography than the average person does today. This heavy door opens directly into the missile vault and was used to load and unload the missile erector. This elevator was built in 1922 and was used until the passing rails were removed in the mid-1970s. An old name for an older elevator, as seen from an abandoned rail spur. This old Jetta did more offroading than your average lifted tinted loud-exhaust pickup.