Environmental Service has completed designing a project that will replace and abandon pipes in poor condition and relieve street flooding and basement sewer backups in the area bounded by NW Yeon Avenue, NW 29th Avenue, NW Nicolai Avenue, and NW St. Helens Road. The project includes diverting stormwater to the Balch Consolidation Conduit sewer pipe, and replacing dams in the Balch Outfall pipe to prevent Willamette River water from backing up into the pipe during heavy rain events.