Pearl Street Drainage Improvement Project
View of facility building and fence
Project description
Reducing stormwater flooding and backups in your neighborhood
The goal of the Pearl Street Drainage Improvement Project is to reduce storm-related sewer backups and flooding in the area, which will help protect public health and the environment as well as improve service reliability.
Seattle Public Utilities has completed this capital improvement project by upgrading the combined sewer infrastructure in Beacon Hill neighborhood.
Construction of storage tank
View of facility building
Construction of storage tank
Control panel display showing storage tank levels
This project involved:
- Installing a new sewer pipe along Corson Ave S from S Ferdinand to S Dawson streets
- Building a large underground storage tank to capture sewage and stormwater during large storm events and then slowly release it into the pipes that run under S Dawson St (view underground storage tank)
- Constructing a small facility building on the south side of the intersection of Corson Ave S and S Dawson St (view facility building design)
- Expanding existing pipe between S Dawson and S Bennett streets using trenchless technology (namely, no excavation for pipe installation) and installing a maintenance hole at the S Bennett street end
- Installing three aboveground electrical cabinets on the north side of S Dawson St
Location
This project is located in west Beacon Hill near Maple Elementary School on Corson Ave S between S Ferdinand St to S Bennett St.
2018 - 2019
- Design and permitting
2020
- Finalize design and prepare for construction
2020 - 2023
- Construction
- Project Fact Sheet (Updated Spring 2020)
- Construction Phase Overview Presentation
- Construction Phase Map
- Aboveground Facility Building Design
- DNS (determination of nonsignificance) for S Pearl Street Drainage and Wastewater Improvements
- SEPA (State Environmental Policy Act) Checklist for S Pearl Street Drainage and Wastewater Improvements