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National Historic Civil Engineering Landmark - Horseshoe Curve

Designed and built under the direction of Pennsylvania Railroad chief engineer and, later, company president, J. Edgar Thomson. Horseshoe Curve opened February 15, 1854. It was 366 meters across and 1310 meters long with a 1.8 percent grade. Eliminating the Portage Railroad's 10 incline planes greatly encouraged east-west trade crossing the Allegheny Mountains.

Completed 1854, Designated 2003, Dedicated 2004.

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