Mill Creek HOPE IV Site Redevelopment Stormwater Management Techniques


In 2002, the Philadelphia Housing Authority partnered with the Philadelphia Water Department (PWD) on the redevelopment of the Mill Creek housing project, a 12.6 acre site located in West Philadelphia. The plan called for the demolition of 440 dilapidated public housing units and the construction of 360 new units.

Design Credit: Wallace Roberts & Todd

Site Design (Small)

The Mill Creek basin is prone to a variety of water-related issues, including combined sewer overflows, flooding, and subsidence from an underground stream. PWD’s role was to design a stormwater management plan that sought to prevent 100% of the runoff generated by new development from leaving the site. As implemented, the plan designed by Wallace Roberts & Todd, LLC, consists of a 2.6 acre on-site park that is underlain by a water detention/infiltration area. The park serves as an accessible public open space for the Mill Creek community, while it also functions as permeable surface area that allows runoff to seep down into the underground storage area. The storage area reduces the peak amount of runoff discharged to the Mill Creek storm sewer system.


County: Philadelphia
Watershed: Schuylkill River


Philadelphia Housing Authority
Philadelphia Water Department
Wallace Roberts & Todd 


$554,573 funded though U.S. Department of Housing & Urban Development’s HOPE VI program and local tax credit


Yong-Woo Lee
Wallace Roberts & Todd, LLC
1700 Market Street, 28th Floor
Philadelphia, PA 19103

Site Design Plan (Large)

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