Project Background

The Mt. Washington Landslide Mitigation project is a City of Pittsburgh Department of Mobility and Infrastructure (DOMI) lead effort with the support of the Federal Emergency Management Agency (FEMA) and the Pennsylvania Emergency Management Agency (PEMA) to preemptively secure the hillsides of Mt. Washington to minimize the probability of a landslide events. In recent times, the Mt. Washington area has been challenged in several areas where hillside instability has spilled debris onto roadways and walking paths.

There are three principle “areas” of Mount Washington to be addressed in the project:

There are three principle “areas” of Mount Washington to be addressed in the project:
  • Greenleaf St (parallel to PA State Route 51/19)
  • Reese St (on the Northern face, below the CBS radio transmission tower)
  • William St (above and parallel to Arlington Avenue and PJ McArdle Roadway)

Greenleaf Street is the street above Saw Mill Run Boulevard (SR 51/19).

Greenleaf Street is the street above Saw Mill Run Boulevard (SR 51/19).

In 2018, a large landslide on Greenleaf Street spilled significant debris onto Saw Mill Run Blvd causing substantial traffic impacts.

The Reese Street site is located on the hillside beyond the end of the street and below the CBS radio Tower. Slope movement threatens to impact the Emerald Park Trail. Further mitigation solutions are needed to ensure long-term slope stability.

William Street above Arlington Avenue and P.J. McArdle Roadway.

William Street above Arlington Avenue and P.J. McArdle Roadway.

In recent years, there have been several landslides along the length of William Street which have caused closure of the road and condemnation of one house. The City has been monitoring the hillside and seeks to develop further mitigations to stabilize the slope, reduce future impacts to additional residential properties, and limit debris from falling onto McArdle Roadway and Arlington Avenue.

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Thomas Tessaro, P.E.

Project Manager

Brian Heinzl, P.E.

Project Manager

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