Background
The Department of Mobility and Infrastructure (DOMI) is remediating 10 identified landslides in Riverview Park. The methods of doing so have included soil nails, beam and concrete walls, and grading and benched the ground and slopes.
These 10 landslides can be identified on this park map by numbers. Remediation of landslides marked 8 and 9 have been completed. Landslide 6 is being remediated this year. Remediation strategies for landslides 1 and 3 are being designed. The remaining five landslides (2, 4, 5, 7, and 10) are being monitored, and remediation will begin once funding is identified.
For the remediation of landslide 6, Duquesne Light Company has completed pole relocation and tree trimming. DOMI we is working with Comcast to relocate its lines. Construction is scheduled to begin later this year by Allison Park Contractors.
Remediation of landslides 1 and 3 are in the final design process, and engineering is anticipated by be completed by the end of the year.
Remediation has been planned for some of the numbered landslides.
FAQ (Frequently Asked Questions)
(Question continued) If so, what species are involved. What soil type is involved? Has overgrazing contributed to the landslides/erosion?
Replanting is part of the project. Each slide is evaluated and a separate landscaping plan is developed and provided to the City of Pittsburgh Forester for review.
The grass proposed for the current Slide S6 is in accordance with Pennsylvania Department Of Transportation Specifications Publication 408 seeding and soil supplements Formula B, D, and E.
The tree replanting includes Sugar Maples, River Birches, American Sycamores, Scarlet Oak, Pin Oak, Silver Lindens, Kousa Dogwood, Star Magnolias, White Pines, Japanese Black Pines, and Dawn Redwoods.
Overgrazing is unlikely to be a contributing factor as to the cause of the landslide. The park is home to typical animals found in park settings such as deer, rabbits, and squirrels, but does not support the agricultural type animals that are traditionally associated with grazing. The landslide is likely the product of drainage at the site and the underlying soil type. The Pittsburgh area is susceptible to landslides due to underlying clay red beds and claystone. When moist or saturated, it is prone to creating a failure plane.
For more detailed information on Slide S6 and future construction projects, plans are available for public review through the Beacon / OpenGov portal once you establish a user account. Landscaping plans and soil core borings are part of the advertisement.
