Tunnel West Portal: (Satellite)
Tunnel East Portal: (Satellite)
Union Tunnel is a little east of Guilford Ave. Bridge.
The main span is over Pennsy's Northeast Corridor. It is 174' (41m) long, and the bridge is 321' (98m) long. [ArchivedBridgeHunter]
I learned of this bridge while researching Pennsy's B&P Junction Tower that is a little west of this bridge. I was going to skip another steel arch bridge until I noticed the 1930 date. It looks like a tied-arch bridge, but I have not been able to confirm that. I thought tied-arch bridges were a post WWII development. But this bridge indicates that they were used a few decades earlier.
Guilford Avenue Bridge
I Googled "Hoffman Tunnel" because it runs under Hoffman Street. The results indicated thatthe correct name is Union Tunnel. I presume that is because the Penn Station was sometimes called Union Station.
I could not get a street view of the tunnel from the bridge because there is a solid wall on the outside of the bridge blocking the view. This view is from I-83.
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| Street View, Oct 2023 |
"The Union Tunnel is about 0.6 miles [1 km] long." [maryland]
"The tunnel consists of two parallel bores: the original bore from 1873 has a single track, while a newer bore from 1934 has two tracks." [wikipedia]
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| By Unknown engraver - Richardson, James. "Traveling by Telegraph, Northward to Niagara." Scribner’s Monthly, Vol. IV, No. 1, p. 4. (https://archive.org/stream/scribnersmonthly04newy#page/n10/mode/1up), Public Domain, Link |
This is a 11:02 railfan video of trains going in and out of the west portal.
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