$5.4 million stormwater mitigation in Pennsylvania should resolve decades of flooding

Authorities hope a $5.4 million stormwater mitigation project in Radnor Township, Pennsylvania, will put an end to decades of flooding, Main Line Media News reported.

The project will use an area beneath a municipal parking lot to store water and slow release runoff on South Wayne Avenue, which has long struggled with flooding, the article states. Commissioners said cars have been known to float down the street during significant rain events.

The project will also add inlets to South Wayne Avenue into the storage area, add inlets and piping to West Wayne Avenue and add piping on School Lane.

The township has an underutilized stormwater management system under local school fields, so it will redirect stormwater there by adding storm sewer piping, Main Line Media News reported.

“This is the largest stormwater project to date in the township,” said Moira Mulroney, president of the Radnor Board of Commissioners.

The problems around South Wayne Avenue are another example of an area being developed too quickly for underground infrastructure to keep up. The township adopted its first stormwater management ordinance, according to the article.
In 2013, the commissioners adopted a new ordinance that established a user fee for stormwater collection and management, Main Line Media news reported.

“Having this project here is going to be relief to … many different people. It will also protect our valuable infrastructure in the township from our school buildings, our fire department, and our library, as well as the neighborhood,” Commissioner Lisa Borowski said.

The commissioners celebrated the start of construction last week, and expect it to be completed in November.

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