The long-forgotten tunnels that carried 40 million tons of coal under the Allegheny
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.
wtae.comMar 1, 2023
Allegheny Mountain Tunnel Construction
After 97 years of wear and tear, the Armstrong Tunnel portals needed a good cleaning, and that’s exactly what they got. Over the past few months, crews have been wet-blasting the north and south entrances/exits to the tunnel. That involved using high-pressure water with abrasive particles to remove almost a century’s worth of soot and grime. Architect Stanley L. Roush designed the portals. In addition to numerous bridges throughout the region, Roush also designed the County Office Building, Corl
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After 97 years of wear and tear, the Armstrong Tunnel portals needed a good cleaning, and that’s exactly what they got. Over the past few months, crews have been wet-blasting the north and south entrances/exits to the tunnel. That involved using high-pressure water with abrasive particles to remove almost a century’s worth of soot and grime. Architect Stanley L. Roush designed the portals. In addition to numerous bridges throughout the region, Roush also designed the County Office Building, Corl
FacebookAllegheny County Governmen
3.2K views4 months ago
Pennsylvania Turnpike moving ahead with new road to bypass Allegheny Tunnel in Somerset County
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Pennsylvania Turnpike moving ahead with new road to bypass Allegheny Tunnel in Somerset County
post-gazette.com
Feb 23, 2020
Trans Mountain pipeline begins construction of tunnel in Burnaby
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Trans Mountain pipeline begins construction of tunnel in Burnaby
vancouversunThe Canadian Press
May 27, 2021
Top videos
Driving through the Allegheny Mountain Tunnel on the Pennsylvania Turnpike
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Driving through the Allegheny Mountain Tunnel on the Pennsylvania Turnpike
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Allegheny Mountain Tunnel, PA, longest tunnel & an "engineering marvel" when it was built in 1939
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Allegheny Mountain Tunnel, PA, longest tunnel & an "engineering marvel" when it was built in 1939
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New PA Turnpike proposal for Allegheny Tunnel in Somerset County
New PA Turnpike proposal for Allegheny Tunnel in Somerset County
wtae.com
Feb 25, 2020
Allegheny Mountain Tunnel History
Alpine Tunnel - Alchetron, The Free Social Encyclopedia
Alpine Tunnel - Alchetron, The Free Social Encyclopedia
alchetron.com
Sep 12, 2015
Tunnel T5 opened to bypass dangerous Panthyal stretch on Sgr-Jmu highway
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Tunnel T5 opened to bypass dangerous Panthyal stretch on Sgr-Jmu highway
FacebookGreater Kashmir
308K viewsMar 16, 2023
Cowan Tunnel - Alchetron, The Free Social Encyclopedia
Cowan Tunnel - Alchetron, The Free Social Encyclopedia
alchetron.com
Feb 25, 2013
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