One of the many fascinating things about the Pittsburg & Shawmut was their trestles which on the P&S were called viaducts. This section is about the longer trestles, but there were many smaller bridges over creeks, roads, etc..
From North to South there were trestles at Brockway, North of Brookville, Sound of Brookville Yard, East Branch, Sprankle Mills, Nitro/Pine Run/ Little Mud Lick, Sugar Camp, Colwell, North of Mahoning Yard, and Reesedale.
There were thru truss bridges crossing Mahoning Creek south of Colwell, and the big thru trussbridge crossing the Allegheny River at Reesedale that were also called viaducts.
Here’s length info about the viaducts:
Lanes (Delwood/Brockway – 695 feet
Little Mill creek (Brookville N) – 756 feet
Brookvile (Brookville S) – 785 feet
East Branch (south of Knoxdale) – 1478 feet
Sprankle (Sprankle Mills) – 1430 feet
Sugar Camp (Putneyville) – 660 feet
Mudlick (Putneyville) – 630 feet
Mahoning Creek (Colwell) – 508 feet
Mahoning Creek (North of Mahoning Yard) – 310 feet
Allegheny River (Reesedale) – 1124 feet
The first sizable viaduct and a rather unique viaduct was heading railroad south out of Brockway where the Shawmut crossed RT 219 (Pittsburgh Buffalo Highway) as well as the former BR&P/B&O now B&P, and Rattlesnake Creek in this photo from S. Kolata.
A short southbound with three Mountain Laurel units stretches out over the Brookville curved viaduct.
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