Pennsylvania Railroad (PRR) "Standard Railroad of the World" License Plate 4231 the Baltimore & Ohio and

the Baltimore & Ohio and the Pittsburgh & Lake Erie)

The Hot Metal Bridge across the Monongahela River was built to connect the blast furnaces (making pig iron) on one side of the river with the open hearth furnaces (making steel) on the other side of the river

7 km) 4 ft 8 1⁄2 in (1

Large plants for the manufacture of silica brick were developed at Mount Union around the turn of the 20th century

The East Broad Top Railroad and Coal Company was chartered in 1856

Pennsylvania Railroad (PRR) "Standard Railroad of the World" License Plate 4231 the Baltimore & Ohio andPennsylvania Railroad "Standard Railroad of the World" License Plate 6" x 12" . 025 Gauge Aluminum Includes 4 Mounting Slots & 1 2" Radius Rounded Corners UV Protective coating to Prevent Fading Image is reproduction final product might differ slightly Made in America The Pennsylvania Railroad (reporting mark PRR) was an American Class I railroad, founded in 1846. Commonly referred to as the "Pennsy," the PRR was headquartered in Philadelphia,