Sunday, April 5, 2026

1907 Blair Gap Dam on Blair Gap Run and Skewed Arch Bridge over Portage Railroad near Cresson, PA

Dam: (Satellite)
Bridge: (Satellite)
Engine House 6: (Satellite)

Blair Gap Dam


This dam was built in 1907 to provide a water supply, and it is 47' (14.3m) high. [blair-county]

Street View, Nov 2015

Facebook Reel
It is 316' (96.3m) long. Linda called the cylinder to the left of the spillway the valve house.

Skewed Arch Bridge


Street View, Aug 2019

Joanne Harrity, Apr 2021

Jenn Gray, Oct 2023

Kirk (kirkevonphilly), Sep 2025

Troy, May 2018

I was going to skip yet another stone arch until I noticed that the stones change direction about halfway up the arch.
Ken Locher, May 2022

Engine House #6


Sam L, Aug 2024

CJ Q, Oct 2025

Kevin Horst, Oct 2024

Gregory Wood, Mar 2020

Joshua Warzel, Sep 2022

Joshua Warzel, Sep 2022

There is a large visitor center nearby.
lindsta, Sep 2025

1872 Aban/(Pennsy+P&S) 754' (230m) Tunnel and Bridges at Brookville, PA

West Portal: (Satellite)
East Portal: (Satellite)

P&S = Pittsburgh & Shawmut

Facebook Reel

In the above video, Linda says that this bridge is over the Redbank Creek. But since the bridge is straight, I think she is headed to the eastern portal and the bridge is over Sandy Lick Creek. The bridge on the west side is curved and is over Redbank Creek.
Satellite

The Pennsy route east of town is now operated by the Buffalo & Pittsburgh Railroad. And the Pittsburg & Shawmut roundhouse is now used by Brookville Equipment Corp. The abandoned railroad west of the tunnel is now the Redbank Valley Trail.
1924/1957 Brookville Quad @ 62,500

Robert Hartloff posted five images with the comment: "I see a lot of pictures of the famous bridge in Brookville, Pa but never of the Pennsylvania RR tunnel. It appears it was built for 2 tracks. May have been originally Lake Shore and Michigan Southern? My pictures. 10-20-22"
Shane Rosencrance: That's the PRR low grade, nee Allegheny Valley Railroad, the NYC swung across the Coder Viaduct and met the Low Grade at Rose just outside of Brookville. Trackage rights were then shared until reaching the central PA coal fields.
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It is closed because of "structural issues."
BridgesOfTheUSA, this webpage has many photos of the tunnel.

Saturday, April 4, 2026

Erie Canal Aqueduct over Moyer Creek in Frankfort, NY

(Satellite, in this town, Canal Street replaced the canal.)


Yvonne Wall posted 10 images with the comment: "Frankfort, Aquaduct over Moyer Creek and a view of the bridge from near the canal. Dean D'Amelio did a post on the old canal and we are good friends and I asked him to help me describe it. Next it is 1914 and the New York Barge article from my newspaper collection."
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1898/98 Utica Quad @ 62,500

Erie Canal Locks #60,#61 and Barge Canal Lock #30 at Macedon, NY

Erie #60: (Satellite)
Erie #61: (Satellite)
Barge: (Satellite)

Erie Canal Lock #60 (Lower Macedon Double Lock)


ErieCanal_60
"Enlarged Erie Canal Lock No. 60 (also called the Lower Macedon lock) is located a mile east of the village of Macedon, NY on the north side of the existing Erie Canal, which parallels NY Route 31 at this point. It was built in 1841 as a single chamber lock with a 10 foot [3m] lift, replacing the original 1822 Clinton's Ditch lock. It was doubled in 1874, and the north chamber was lengthened at the foot (eastern) end in 1888. The towpath was on the south side. It was in use until 1914."
"Enlarged Erie Canal Lock No. 60 -- North (lengthened) chamber
 looking east towards Albany from within the canal prism"

B Gray, Sep 2024

Erie Canal Lock #61 (Upper Macedon Double Lock)


Lock #61 had a lift of 6' (1.8m). [ErieCanal]

Street View, Jun 2024

Gary Prodrick posted
Yesterday in Macedon NY.
[I have no idea where this marker is, but the topo map allowed me to find the remnants of the lock.]

1900/99 Macedon Quad @ 62,500

Barge Canal Lock #30


Street View, Oct 2021

Street View, Jun 2024

nycanalmap

Friday, April 3, 2026

1909 Austin Dam on Freeman Run upstream of Austin, PA, failed on Sep 30, 1911,

Dam: (Satellite)
Paper Mill Ruins: (Satellite)

This was the upstream face. We are seeing the edge of the segment on the left side of the photo because the water turned it,
Street View, Jul 2024

This satellite image better shows how that segment got turned.
Satellite

Toni Sterling, Mar 2022

The downstream side.
Christine G, Oct 2024

Frugal Livin', Jun 2024

Christine G, Oct 2024

Facebook Reel

The above reel includes scenes of the ruins of the Bayless Pulp and Paper Co. that was destroyed by the flood.
Same Reel

Troy Feldbauer, Jun 2025

Christine G, Oct 2024