1962: (Satellite)
2024: (just upstream of the 1962 bridge)
The truss bridge was removed between 1986-91.
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| Street View, Oct 2022 |
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| Street View |
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| Image via BridgeHunter |
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| Postcard via BridgeHunter |
This view shows the spans use steel girders. It also shows the navigation channel is near the eastern shore. I'm surprised they provide a long, high span for navigation because the Oahe Dam, which is just upstream, does not have a lock.
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| Street View, Nov 2019 |
The new bridge is replacing the 1962 4-lane bridge with 4-lanes and a trail. It looks like they realized that the high clearance for a navigation channel was not necessary. The dam was finished in 1962 so they knew navigation would be blocked just upstream when they built the 1962 bridge. Navigation was not blocked by the dam when the 1907 swing span was built.
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| SDDOT |
The new bridge will also a steel-girder bridge.
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| SDDOT |
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| SDDOT posted A unique aspect of the Pierre-Fort Pierre Bridge Project has been building the drilled shafts with the top of the shafts below water. Drilling deep underwater requires extensive planning and extra care. Missouri River elevations in Pierre/Fort Pierre fluctuate three to four feet every day due to the Oahe Dam just above the project. With the drilled shafts as deep as 135 feet, workers have put in extra hours, fine-tuned processes, and adjusted their work schedule to accommodate the changing river elevation. Construction of the new bridge was recently featured in Western Builder, an Associated Construction Publication. You can read more about the process of constructing the bridge at: https://tinyurl.com/westernbuilderbridgework. For the latest construction information, videos, and photos, please visit the project website at https://pierre-ftpierrebridge.com. |
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| sddigitalarchives |
For future reference: $21m is being spent to fix more than 200 welds on the I-90 bridge over the Missouri River that used T-1 steel! [keloland]
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