It may also be in red in the map on this page, but it's difficult to tell for sure.
Scottdale had both passenger and freight stations at the time, so maybe the passenger trains followed this ROW? Just guessing.
Looks like there was an old ROW that entered Scottdale on the west side of Jacobs Creek and possibly crossed a small bridge on the south side of Scottdale at 40.094492, -79.591247
possibly an old interurban railroad. Some of the old track is visible on the south side of Scottdale if you turn the Google Earth clock back to 2005.
Guess late 1800's until ~1945.
I attached a screen pic from Earth 2005 with the ROW in blue.
Also, Jacobs Creek appears to be the county line, so this bridge looks to be in two counties.
According to old maps from HistoricAerials and this: http://www.trainweb.org/chris/swpenn.html
This may have been built in 1871 for the Mt Pleasant and Broad Ford Railroad, which eventually became the Mt. Pleasant Branch of the Baltimore & Ohio Railroad.
Possibly an old rail ROW went across the bridge up the west side of Scottdale. If so, build date same as the railroad?
The stone in this bridge is in great shape.
I am seeking the date of construction. It almost surely predates the founding of Scottdale, 1874.
Any help would be appreciated.
Might be worth a Visit!