Chestnut Hills Storm Water Demonstration Park

Porous Pavers and Rock Infiltration Berm

Porous Pavers consist of manufactured concrete units that reduce stormwater runoff volume, rate, and pollutants. The impervious units are designed with small openings between permeable joints. The openings are filled with highly permeable, small-sized aggregates. The joints allow stormwater to enter a crushed stone aggregate bedding layer and base that supports the pavers while providing storage and runoff treatment. Porous Pavers are highly attractive, durable, easily repaired, require low maintenance, and can withstand heavy vehicle loads. 

Rock Infiltration Berms provide the same stormwater storage and infiltration as porous pavers, but without the vehicle bearing paver surface on top.


Porous Pavers and Rock Infiltration Berms can be used for municipal stormwater management programs and private development applications. The runoff volume and rate control, plus pollutant reductions allow projects to meet regulatory water quality criteria. Porous Pavers can replace traditional impervious pavement for most pedestrian and vehicular applications except high-volume/high-speed roadways. These pavers have performed successfully in pedestrian walkways, sidewalks, driveways, parking lots, and low-volume roadways. In addition to providing stormwater volume and quality management, light colored pavers are cooler than conventional asphalt and help to reduce urban temperatures and improve air quality. The textured surface of the pavers also provides traffic calming and provides an aesthetic amenity.



Rain Gardens and Bio-Swales (Bio-retention)

Bioretention areas, including rain gardens and bio-swales, are landscaping features adapted to provide on-site treatment of stormwater runoff. They are commonly located in parking lot islands or within small pockets of residential land uses. Surface runoff is directed into shallow, landscaped depressions. These depressions are designed to incorporate many of the pollutant removal mechanisms that operate in forested ecosystems. During storms, runoff ponds above the mulch and soil in the system. Runoff from larger storms is generally diverted past the facility to the storm drain system. The remaining runoff filters through the mulch and prepared soil mix. The filtered runoff can be collected in a perforated underdrain and returned to the storm drain system.


Bioretention systems are generally applied to small sites and in a highly urbanized setting. Bioretention can be applied in many climatological and geologic situations, with some minor design modifications. Bioretention features can be incorporated easily into ultra-urban areas, areas with concentrated stormwater pollutants, retrofits in existing developments, and areas surrounding sensitive cold-water trout streams.


This project was financed in part through a grant from the State of Ohio Environmental Protection Agency and the United States Environmental Protection Agency, under the provisions of Section 319(h) of the Clean Water Act.




For more information regarding stormwater management information for your home or business, please see the following links…

Rain Garden Manual for Homeowners

 EPA Guide to Stormwater Management Practices

Ohio Land Development Regulations for Stormwater Management

Portage County Soil & Water Conservation District