Four Mile Run Stormwater Project

In Planning Stormwater

The Four Mile Run Stormwater Project encompasses Schenley Park and several Pittsburgh neighborhoods including Garfield, Hazelwood, Oakland, and Squirrel Hill. This project will capture and route stormwater through a natural channel that will follow the path of the historic streams that formed Four Mile Run from Panther Hollow Lake to the Monongahela River. It will help to reduce combined sewer overflows, basement backups, and neighborhood flooding.

Progress & Status

Design Complete

Panther Hollow Lake

  • Stormwater improvements to Panther Hollow Lake will enable us to manage the depth of the lake and control the volume of water entering the combined sewer system. 
  • The Pennsylvania Department of Environmental Protection (DEP) is requiring a dam permit for the lake. 
  • We are working to obtain the necessary permits and meet safety regulations. 

Junction Hollow: Stormwater improvements will follow the path of the former Junction Hollow Stream. This portion of the project will channel rainwater, restore streambanks, and plant native and climate tolerant vegetation. 

Connection to the River: A deep gravity pipe will be installed to convey stormwater from Schenley Park and the Run Neighborhood to the Monongahela River. 

Project Costs: The Four Mile Run Stormwater project uses the most cost-effective strategies to minimize flooding. The total project cost is approximately $36.1 million and includes the following: 

  • Design, Easement, Permitting, and Modeling Fees: $7.5 million
  • Early Action Project: $537,000
  • M29 Outfall Project: $3.6 million
  • 50-inch Water Line Relocation: $7 million
  • Stream and Panther Hollow Lake and Dam: $3 million
  • Stormwater Pipeline: $11 million
  • Construction Management and Inspection: $2.5 million
  • Future Maintenance and Operation: $1 million

Community Meetings

Additional Information

Locations & Schedule

Start Date: Design Started: May 2018. Construction Expected: Summer 2021 (will begin after permits are approved)

Completion Date: Design Completion: Fall 2020. Construction Completion: There are multiple phases to the overall Four Mile Run Stormwater Project. Work will continue for several years.

Map of Four Mile Run showing its boundaries, neighborhoods, and connection to the Monongahela River

Schenley Park
Pittsburgh, PA 15213
United States

Project Contacts

If you have questions, please contact the Project Manager

Senior Group Manager, Stormwater :
Tony Igwe

If you have questions, please contact Public Affairs

Senior Manager, Public Affairs :
Rebecca Zito