Four Mile Run is a PWSA Priority Watershed that includes all of Schenley Park and portions of the neighborhoods of Oakland, Squirrel Hill, Greenfield and Hazelwood. The Run currently drains to the ALCOSAN system and overflows into the Monongahela at Outfall M-29, a few hundred feet upstream of the Hot Metal Bridge.
ALCOSAN's typical year analysis reveals 79 overflow activations of the M29 Outfall for a total of 467 hours of overflow discharge accounting for 400 million gallons of overflow.
PWSA has invested in wet weather infrastructure at Wightman Park in the upper portion of the watershed. These waters and sewer flow toward Junction Hollow. Updates on the second phase of work is available from PWSA.
In 2025 the Mon Water Project (MWP) was founded. The MWP website states that, "The MWP and its Coalition will conserve, restore, enjoy, and protect our neighborhood’s tributary waters to the Monongahela River. We will educate and activate individuals as we plan, partner, and build science-based solutions in our watershed. The MWP believes that flooding is solvable, creeks are restorable, rivers are for recreation, and urban land use practices can be a part of a sustainable restoration and conservation movement in the City of Pittsburgh and its Rivers." To learn more visit the MWP website.
Citizen Participation:
The first meeting of the Four Mile Run Task Force was Monday March 23. A Watershed Walk for a section of Four Mile Run was held on October 8, 2020. The spring 2021 meeting of the Task Force was on April 7.
Reports
