Runoff Recharge: Floral Street Elementary School, Shrewsbury
All parking lot and rooftop runoff from the school site discharged directly to the wetland adjacent to the school, which in turn drained into Hop Brook, a tributary of the Assabet River. It was a standard piped drainage system, with catch basins and roof drains tied into drain manholes. The manholes were equipped with oil/water separators and sediment sumps to trap pollutants. The Project funded the retrofit of the existing drainage system by directing the treated roof and parking lot runoff to a series of 16 drywells located between the school building and Hop Brook. The project was completed in 2005.
Method used: Roof drainage redirected to dry wells
Sub-watershed: Hop Brook
Recharge estimate: 1.31 million gallons of water per year
(46,000 gal. per storm event)
Intel grant: $69,000, for construction
Town contribution: $8,000, value of design and engineering services
Location: 57 Floral Street, Shrewsbury
Contact: Jack Perreault, Town Engineer, Tel: 508-841-8502
When reviewing projects with developers, the Town points to the Floral Street School project as an example of what the developers can do on their own projects to increase groundwater recharge and base flow to streams.
Jack Perreault, Town Engineer Shrewsbury