Truth in stormwater billing

Digital surface models of downtown Columbus, Ohio, as captured from light detection and ranging (LiDAR) instruments. Photos: City of Columbus and Woolpert Inc.

Data from Woolpert Inc.'s automated feature extraction process indicates that Columbus, Ohio's impervious surface maps left out nearly 29,000 square feet of impervious surface at the Eastland Mall pilot area. Source: Columbus (Ohio) Public Utilities, Operational Support Office

By combining digital orthoimagery with light detection and ranging (LiDAR) datasets to recalculate the Eastland Mall pilot area's existing impervious surface, the Columbus Public Utilities Department increased monthly stormwater billing revenue by $76 (nearly $1,000/year). Source: Columbus (Ohio) Public Utilities, Operational Support Office

This photo represents existing AutoCAD data of parking lot islands delineated using as-built drawings.

This photo shows new impervious surfaces delineated using remote-sensing techniques (digital orthoimagery and LiDAR data). Conclusion: Far fewer impervious islands exist than originally thought.

Close X