Bioretention cells, also called ‘rain gardens,’ are the most popular practice associated with Low Impact Development (LID) or Green Infrastructure (GI). NC State’s pioneering efforts have led to many design features associated with bioretention, including optimal media selection for phosphorous removal, internal water storage reservoirs, vegetation selection, maintenance needs, and surface water storage requirements. The NC State-produced HyPerMod spreadsheet tool underpins North Carolina’s flexible design standards for bioretention.

Grantors: NCDENR 319, NOAA, Chagrin River Watershed Partners, Colorado State University, US EPA

Most recent project locations: Fort Bragg, NC; Cary, NC; Asheville, NC; Rocky Mount, NC; Chagrin River Watershed, OH; Nashville, NC