Description: This line feature layer represents storm drain pipes maintained and managed by the Ada County Highway District (ACHD) in Ada County, Idaho. Each feature corresponds to an individual pipe segment and may include attributes such as pipe identifier, pipe type, pipe material (concrete, HDPE, CMP, PVC, RCP), pipe diameter, pipe shape, pipe slope, pipe length, flow direction, associated structures (upstream and downstream manhole or inlet), drainage basin, installation year, condition rating, inspection date, and maintenance jurisdiction. Storm drain pipes form the primary underground conveyance network of the ACHD stormwater system, transporting collected surface water runoff from catch basins, inlets, and other collection structures to detention facilities, outfalls, or receiving water bodies. The dataset is intended to support stormwater system inventory, drainage network analysis, condition assessment, capital improvement planning, illicit discharge detection and elimination (IDDE), maintenance prioritization, and asset management across the ACHD jurisdiction in compliance with National Pollutant Discharge Elimination System (NPDES) permit requirements. Data was compiled and is maintained by the Ada County Highway District.
Service Item Id: aff16c0204af4ce8a4c553ad15431765
Copyright Text: Created by Ada County Highway District, 2026. Storm Drain Pipes data sourced from the highway district.