The 2020 Dual Drainage Model provides a greater understanding of the issues that contributed to flooding within the Run neighborhood. We can now make more informed decisions about the project and provide a higher level of flood protection. 

On Thursday, June 18 we hosted an online community meeting about the Four Mile Run Stormwater Improvement project. Approximately 50 people attended to learn about its status, updated modeling, and anticipated construction schedule. 

The updated modeling is the most notable change since meeting with the community this past December. Earlier this year, we completed an enhanced drainage model that looks at above ground surface drainage, below ground drainage systems, and the factors that contribute to overland flooding. The new model builds on previous modeling efforts and provides a greater understanding of the issues that contribute to flooding within the Run neighborhood. 

With the improved modeling, we have been able to make better design decisions that will provide additional flood benefits within the project area. The updated modeling was used to inform the pipe system to the river, verify the design at Panther Hollow Lake and Junction Hollow Stream, as well as evaluate alternative solutions before selecting a final design.  

Attendees were receptive of the improved modeling and are encouraged by the higher level of flood protection. We are designing the project to manage a 10-year storm, which is the equivalent of approximately 3.3 inches of rain in 24 hours.

Those in the project area would like to see more design detail to illustrate how the trails in Schenley Park will change as the stormwater improvements are built. There were also questions about landscaping, construction impacts, permitting with the railroad, and funding. PWSA remains committed to this project and it is fully funded. More information about the Four Mile Run project is available at pgh2o.com/4mr.