• Photo of Lemon House, Level #6, and Engine House on a beautiful summer day.

    Allegheny Portage Railroad

    National Historic Site Pennsylvania

There are park alerts in effect.
show Alerts »
  • Road Closure

    Please be aware that part of the public area loop has been closed until further notice as the park starts preparatory efforts for this summer's paving project on the Picnic Area Road.

Environmental Factors

Plant, animal, and other living organisms in an ecosystem are influenced not only by each other, but also by nonliving factors such as the chemistry of the air, soils, and water. At Allegheny Portage Railroad NHS, monitoring of the air and water protect the natural integrity of the park and provide information about the ground and air chemistry of the surrounding area. Efforts are also made to correct the inadvertent shifts in the natural communities that came about as a result of mining and nonnative species introduction. Natural plant communities are restored and preserved by combating exotic, invasive species that infest the park.

Monitoring in the Context of Climate Change

Forest Vegetation Resource Brief

Did You Know?

drawing of the South Fork Dam

The dam at South Fork, PA, that broke causing the Johnstown Flood of 1889 was originally built for the Mainline Canal System. The Allegheny Portage Railroad was an important part of the Mainline, so the stories are interconnected.