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

    Allegheny Portage Railroad

    National Historic Site Pennsylvania

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  • Picnic Area Road Paving Project

    The park picnic area will be closed from 10/6/2014-10/10/2014 for repaving. The picnic area is schedule to reopen on 10/11/2014. Check back for more updates.

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?

Viaduct in 1885 before the great Johnstown Flood

The Conemaugh Viaduct was used by trains even after the Portage Railroad closed. The Johnstown Flood of 1889 washed the original viaduct away, but a replacement was completed within 3 days of the flood.