20220921 10343700 1.0 TRUE Ditch This polyline feature class contains stormwater ditch information in the City of Sammamish. The information was digitized from record drawing information provided by the City. Information collected includes ditch shape, surface, slope, install year, to and from structure id, to and from structure invert elevations, ownership, and data source, where available. Stacey Clear, P.E., Kerri Sidebottom, Jeziel Palapuz, Lars Zwaanenburg, Gray & Osborne Inc.