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 Pigeon Mountain Tunnel. March 17, 1888 the construction of this 92 mile stretch of the Chattanooga Southern Railway began. The line would run from Chattanooga to Gadsden serving the transportation needs of agricultural cotton and iron ore. It was proposed to extend the lines to Columbus, GA to connect with independent lines giving a route to Florida and coast points. It became apparent that there was not enough freight via passengers or cotton, and the iron ore could not be economically mine

20K views · 4.1K reactions | Several trips in different seasons yield a variety of trains at the west portal (Sand Patch Summit) of the Sand Patch Tunnel. From the Pentrex show "Into The Allegheny Range, Part 4, Sand Patch" https://rfd.video/Allegheny4 The entire 4 volume, "Allegheny" series for a special price! https://rfd.video/AlleghenySet | Railfan Depot | Facebook

PA Turnpike Tunnel Guard Julie Leydig jumped into action when a bus carrying 44 eighth graders became disabled outside of the Allegheny Tunnel. She fed the students, gave them water and kept them safe until they could get back on the road. | Pennsylvania Turnpike

Roman engineers carved a tunnel through a mountain to save a vital harbor from being buried. #history #archaeology #ancienthistory | Earthly Wonders

5.5K views · 84 reactions | 25 mile climb up Savage Mountain from the Cumberland Gap, then through the Savage Tunnel that's over a mile long. The Great Allegheny Trail. C&O from DC to Cumberland. | Ohio History Hunter | Facebook

39K views · 5.9K reactions | CSX action at, and some history about Sand Patch Tunnel on the former B&O, then Chessie System line. From the Pentrex 2-disc show "Into The Allegheny Range, Part 4, Sand Patch" https://rfd.video/Allegheny4 | Railfan Depot | Facebook