Project Location
South 140th Street between 8th Avenue South and Des Moines Memorial Drive South.
Project Overview
This project was first included in the 2014 Northeast Redevelopment Area (NERA) Master Drainage Plan. Planned redevelopment of properties within NERA require upgrades to the stormwater conveyance system along South 140th Street.
This project consists of constructing a new large-diameter stormwater trunkline within South 140th Street, along with improvements to the existing outfall into Miller Creek and water quality improvements for the roadway affected by the project.
Improvements include:
- Construction of approximately 630 linear feet of new 24- and 30-inch stormwater pipe, to replace the existing 12-inch pipe that has reached capacity.
- Construction of flow control and water quality improvements via a dispersion system on the south side of South 140th Street.
- Construction of a stormwater outfall into Miller Creek on the south side of South 140th Street, to replace the existing outfall on the north side of the street.
Project Status
Project Construction Start Date: Spring 2025
Construction Completion Date: Fall 2025
Project construction was completed in December 2025, with the one-year plant establishment period continuing through Fall 2026. No neighborhood or traffic impacts are expected during this one-year period.
Project Manager
Dan O’Brien
Stormwater Engineer
(206) 248-5521
[email protected]
Updated July 7, 2026