Description: This feature class contains Multnomah County District 4 stormwater pipe infrastructure. A variety of methods and data sources were employed to create this data. Existing datasets obtained from neighbor jurisdictions within district 4 were used as a starting point. Line accuracy was then improved, within the county right of way, using the best available data sources. These sources include resource grade GPS, Ground Based Lidar, Aerial Photos, Georeferenced As-Built Drawings, Georeferenced Mylar Drawings, Field Visits, and Google Streetview. Depending on the source used to verify the data, the accuracy of this feature class is estimated to be <3 meters.