Wednesday, June 25, 2025

1911+1936+1999 US-95 Goff (Time Zone) Bridges over Salmon River near Riggins, ID

1911: (Archived Bridge Hunter, broken link; Bridge Hunter)
1936: (Archived Bridge Hunter, broken link; Bridge Hunter, no Historic Bridges)
Darel Maden posted
US 95 Salmon River Idaho

1911


I see gusset plates instead of pin connections.
BridgeHunter_1911, Credit: Idaho State Archives

BridgeHunter_1911, Credit: Idaho State Archives

1936


BridgeHunter_1926, 1999 photo by Richard Doody

More 1999


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When I saw this photo my thought was that you can't close the old bridge to build the new one.
BridgeHunter_1936, Credit: Idaho State Archives

It turns out this was part of a 72-hour closure to move the truss over to act as a temporary bridge while the new one was being  built.
0:34 video @ 0:25

US-95 was reopened 36 hours ahead of schedule. This is a good thing because the detour is 500 miles. [idaho]

This photo shows the beams on which the 1.24 million-pound truss was moved 65' (20m) to the west.
BridgeHunter_1936, Credit: Idaho State Archives

I presume the blue towers were part of the falsework to build the arch.
BridgeHunter_1936, Credit: Idaho State Archives

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