Basin 3 / Tryon Headwaters Stormwater Improvements

Sewer and Stormwater
Completed
In partnership with property owners and residents, we worked on a range of investments that will help improve stormwater management in the Basin 3 and Tryon Headwaters area to slow stormwater, reduce flooding, and improve water quality as it discharges to local Spring and Tryon creeks.
Construction was completed in March 2022.
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What’s Happening Now 

Construction is complete. If you have any questions or comments about this project, please reach out to Lisa Moscinski.

We want to Hear from You 

Please contact us if you have any questions or concerns related to business operations, disability or mobility issues, and medical or business deliveries. Your input will help us design a successful stormwater project that minimizes the impact to your neighborhood during construction.  

Be sure to include your name, property address, and project name (Basin 3) in your voicemail and email so we can provide you more details about what to expect in front of your property. Also, please write “Basin 3” in the subject line of your email.

Project Background 

In January 2018, Environmental Services initiated a stormwater study in Basin 3 and the larger Tryon Headwaters area (Tryon Creek above I-5). This work is complementary but separate from the SW Capitol Highway project. The  SW Capitol Highway: Multnomah Village to West Portland  project is a joint effort by Environmental Services, Portland Water Bureau, and Portland Bureau of Transportation (PBOT) for street and stormwater improvements along SW Capitol Highway between SW Garden Home and SW Taylors Ferry Road. 

During the planning of the SW Capitol Highway project, Basin 3 (one of the four subbasins that SW Capitol Highway drains to) was identified as having a variety of known, persistent drainage issues. 

Throughout 2018, Environmental Services staff collected data and information, ranging from historical reports from residents of stormwater issues in the neighborhood to new data from flow monitors. We gained a better understanding of the existing public-private patchwork system, how water moves through it, and how much water needs to be managed. 

Bureau staff worked with the local community to find ways to manage stormwater throughout the neighborhood, instead of just one property at a time. Staff identified a range of public and private investments that will help improve stormwater management. These investments have been grouped together into short-, medium-, and long-term projects. This will help us address immediate needs while we monitor and determine if additional long-term solutions are necessary. 

BES started implementing several of the short- and medium-term projects in 2019/2020.