The long-forgotten tunnels that carried 40 million tons of coal under the Allegheny
wtae.com
The long-forgotten tunnels that carried 40 million tons of coal under the Allegheny
Built over 100 years ago, the two tunnels that span Plum and Springdale underneath the Allegheny River were hailed at the time as feats of engineering.
Mar 1, 2023
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The Department of Public Works’ 2025 construction season is wrapping up. 🥳 And what a season it was: ☑️ Brighter, safer Armstrong Tunnel reopened ☑️ 1,001 service requests completed ☑️ 23 miles of roadway paved ☑️ 37 ADA ramps installed ☑️ 255 bridges inspected ☑️ 15 bridge projects finished ☑️ 4 retaining walls constructed ☑️ 9,200 inlets inspected Drivers, thanks for your patience and understanding while we completed this necessary work! | Allegheny County Government
The Department of Public Works’ 2025 construction season is wrapping up. 🥳 And what a season it was: ☑️ Brighter, safer Armstrong Tunnel reopened ☑️ 1,001 service requests completed ☑️ 23 miles of roadway paved ☑️ 37 ADA ramps installed ☑️ 255 bridges inspected ☑️ 15 bridge projects finished ☑️ 4 retaining walls constructed ☑️ 9,200 inlets inspected Drivers, thanks for your patience and understanding while we completed this necessary work! | Allegheny County Government
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Pennsylvania Turnpike moving ahead with new road to bypass Allegheny Tunnel in Somerset County
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