Harbour Ridge Subdivision Type: Infiltration Trenches Use: Residential Installer: J.H. Lynch & Sons Designer/Developer: David D. Gardner & Associates Installation Date: 2006 Address: Summit View Lane, North Kingstown, RI, 02852 Contact: Chris Palmer chris@ddgardner.com This twenty-one lot cluster subdivision with single family homes incorporates a variety of stormwater reduction and management techniques. Infiltration trenches abut the curbless roads and collect water running off the street. The trenches are 2.5 to 3 feet wide and are filled with approximately 4 ft of gravel base backfill that acts to filter the water before infiltration to the ground. At the bottom of the trench a PVC pipe with holes collects and stores water to slowly infiltrate into the ground below. All stormwater infrastructure and systems are designed for the 100 year storm and with the exception of some overflow into a nearby wetland located off site, stormwater is collected and treated onsite and much of it is recharged to groundwater. The subdivision also reduces impervious coverage with the use of landscaped islands in the middle of cul-de-sacs. Infiltration Trench Infiltration trench next to road. Island in the middle of a cul-de-sac Landscaped Cul-de-sac Address: Summit View Lane, North Kingstown, RI, 02852