Finished permeable pavement
Administration Building Stormwater Retrofit
In the spring of 2016, the Madison Township administration building parking lot was renovated to clean and reduce stormwater runoff to Church Creek and Lake Erie. The newly renovated lot includes two bioretention cells and 2,760 square feet of permeable pavement. These systems help the parking lot behave more like a natural landscape, mimicking natural processes to help water soak into the ground where it’s absorbed and filtered by soil, gravel, and plant roots. This keeps rainwater out of storm sewers, prevents sewer backups and flooding, and reduces pollution that would otherwise flow to unprotected waterways. Chagrin River Watershed Partners, Inc. and Lake County Stormwater Management Department assisted the Township with this project.
Rain and snowmelt runoff from the asphalt parking lot drains to 2,760 square feet of pavers and passes through the spaces in between and into layers of underlying stone. The water slows down as it flows through the layers of stone, and pollutants are removed. Some of this water soaks into the ground beneath the stone, and some is slowly released to a perforated pipe underdrain that carries it to a storm sewer that drains to Church Creek. In summer, heated water entering our streams directly from conventional pavement can harm aquatic life and habitat. Reducing this thermal loading improves overall stream health. In winter, drainage of snowmelt through the pavers could reduce the amount of salt needed, also leading to improved water quality.
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