NTM Director of Geospatial Technologies and Watershed Management Paul DeBarry, MS, PE, PH, GISP, D.WRE presented a webinar for the Pennsylvania Society of Land Surveyors (PSLS) on August 19, 2015. Entitled “Low Impact Development (LID),” the webinar provided an overview of what LID is and its advantages to conventional design. Paul reviewed local site investigations required and open space design, discussed design criteria and LID hydrology, and provided working examples of various types of LID and best management practices (BMPs) and where applicable.