Storm Sewer Drainage Basin

The City maintains a digital inventory of the stormwater sewer system drainage area (MS4 area) to aid in implementation of the Integrated Stormwater Management Program control measures. In 2023, the storm sewer drainage basin area was updated and included in the 2023 Integrated Stormwater Management Program Document. The storm sewer drainage area was updated using ArcGIS Pro to model drainage based on the City’s stormwater infrastructure GIS data and a Digital Elevation Model (DEM) derived from Light Detection and Ranging (LiDAR) captured in March 2022. City outfalls that discharge stormwater to surface waterbodies either directly or indirectly were identified as points for analysis. Stormwater Underground Injection Control infrastructure was also analyzed to distinguish between infiltration-only basins and basins draining to the storm sewer system. For more information, please see the 2023 Integrated Stormwater Management Program Document https://www.bendoregon.gov/government/departments/utilities/stormwater