Funded by Ohio EPA Surface Water Improvement Fund (SWIF) Grant

In 2012, the Village of Gates Mills constructed innovative stormwater best management practices, featuring a bioretention cell at the Village’s Service Department and a rain garden at the Gates MillsVillage Hall Complex located at 1470 Chagrin River Road, to demonstrate to local businesses and residents how to lessen the impacts of flooding and improve water quality utilizing a $87,525 grant awarded through the Ohio Environmental Protection Agency’s Surface Water Improvement Fund.  The 1,750 square feet bioretention cell captures and treats stormwater runoff from approximately 100,000 square feet of impervious parking lot surface at the service department facility.  The bioretention cell is strategically positioned between the parking lot and the Chagrin River and captures and filters stormwater runoff generated from the parking lot before it drains into the river. Stormwater can pick up dirt, oil, grease and other pollutants as it flows across hard surfaces such as parking lots and washes them into storm drains which empty into local streams, or in this case directly to the Chagrin River.

Bioretention cells temporarily pond water to a depth of less than 12 inches in shallow, depressed landscape beds providing time for the runoff water to soak into the well-drained soils below the surface of the bioretention cell.  Bioretention cells contain a soil mix comprised of sand, clay and organic matter mixed to a depth of 2.5-3.0 feet. A perforated underdrain pipe located at the bottom of the bioretention cell collects the filtered water and drains it to the existing storm sewer, or in this case, empties the cleaned water into the Chagrin River. Bioretention cells are landscaped with a 3 inch layer of shredded hardwood bark mulch and planted with native perennial flowers and shrubs.

The 1,000 square feet rain garden is located in the lawn area just south of the post office, between the parking lot and tennis courts and treats 20,000 square feet of impervious surfaces. The rain garden practice is easily accessible and highlights to residents the different techniques they can use to manage stormwater and improve drainage on their own individual properties within the Village.

This product or publication was financed in part or totally through a grant from the Ohio Environmental Protection Agency under the provisions of the Surface Water Improvement Fund. The contents and views, including any opinions, findings, or conclusions or recommendations, contained in this product or publication are those of the authors and have not been subject to any Ohio EPA peer or administrative review and may not necessarily reflect the views of the Agency, and no official endorsement should be inferred.