Mouth of Duwamish Design Survey
Mouth of Duwamish Design Survey
Thank you for your interest! Please take 10 – 15 minutes to complete the survey below by August 31, 2025, to share your feedback. When you’re done, you’ll have a chance to win a $50 gift card!
Your input matters.
Help shape the look and feel of clean water facilities in SODO!
King County has proposed clean water facilities to reduce combined sewer overflows (CSOs) at five outfall locations at the mouth of the Duwamish River. These facilities will help control the stormwater and wastewater that is sometimes released into the Duwamish River during heavy storms. The proposed solution includes:
- A new wet weather treatment station in SODO
- A new storage tank in West Seattle (Industrial District West)
- A new outfall for cleaned water
- New pipes and supporting facilities to connect flows along the way
This survey will help inform the look and feel of the new wet weather treatment station in SODO. It will also help us understand how we may align project goals.
We’ll also offer opportunities in the future to give input on the West Seattle storage tank, in alignment with the schedule for that work.
What will happen with my feedback?
We consider all feedback and determine what makes sense for the project’s design. Design decisions must balance many factors, including:
- Cost
- Schedule impacts
- Long-term operations and maintenance
- Environmental impacts
- Community and social impacts
By the end of the year, we’ll share what we heard from the community and explain how that feedback shaped the look and feel of the new wet weather treatment station. If we receive feedback that we cannot use, we will explain why.
What happens next?
You can share your contact information at the end of the survey. If you do, we can reach you for future feedback opportunities. If you opt to not share your contact information, your input will remain anonymous.
We also plan to bring together a Community Sounding Board whose input will inform future design decisions.
How do you interact with the SODO neighborhood? Please select all that apply.
When you think of the buildings, architecture, and landscapes in SODO, what are some words or phrases that comes to mind? For example, when thinking about Pike Place in Downtown Seattle, words or phrases like "bustling" and "historic" may come to mind.
When you think about SODO, what colors come to mind? Please pick your top three (3).
Which of the following elements of the buildings, roads, and green spaces in SODO feel key to the character of the SODO neighborhood? Please pick your top three (3).
What do you think is missing from SODO's buildings, roads, and green spaces? What would make SODO look and feel better to you?
The following questions ask about new clean water facilities in SODO. An example of a recent clean water facility built nearby is the Georgetown Wet Weather Treatment Station. It might be helpful to consider this facility when answering the questions below.
Rendering of the Georgetown Wet Weather Treatment Station in the Georgetown neighborhood.
What should the facility's design draw inspiration from? Please select all that apply.
Which color schemes would you like to be featured in new clean water facilities? Which would you not like to be featured?
Which materials should be featured in the new facility design? Which materials should not be featured?
Think about the architecture of new clean water facilities. What features would you like to see? What features would you not like to see?
The facilities will include landscaping within a perimeter fence. What landscaping features would you like to see? What features would you not like to see?
Please share any additional thoughts you have about the color scheme, materials, architectural features, and/or landscape features for the new facility design.
Imagine you're driving, rolling, riding the bus, or walking past the new Wet Weather Treatment Station in SODO after it's been built. What are some words or phrases you hope would come to mind? What would you like to be feeling?
The question below is about potential benefit opportunities related to this work. Please note that we cannot commit to delivering these benefits in alignment with project goals at this time. Your response will help us to know which options we should prioritize as we explore feasibility.
The new facility could bring many benefits to the SODO neighborhood. Which potential benefits are most important to you? Please pick your top three (3).
Which people or groups do you think will be most impacted by the clean water facilities during construction? Please pick your top three (3).
Which people or groups do you think will be most impacted by the clean water facilities once they are operating? Please pick your top three (3).
The following questions help us understand who we are hearing from and show questions that are relevant to you. Your answers will remain confidential and only be used for research purposes. All questions are optional.
How do you identify? Please select all that apply.
How do you identify? Please select all that apply.
How old are you?
What was your total household income in 2024, before taxes? Your best estimate is fine.
Thank you!
We have two more questions for you. If you answer “yes” to either of the questions below, please provide your contact information before exiting this survey. Your contact information will not be connected to your responses prior to this section.
We would like to contact people who complete this survey for further discussion about the facility's look and feel. Would you like to share your contact information so that we can contact you about these opportunities?
You may now enter a drawing for a chance to win one of four $50 gift cards! Please carefully read the entry rules below.
Drawing Rules
- In order to enter you must complete the Preliminary Design Survey and indicate your interest in entering the drawing by providing your full name and email address or phone number below
- No purchase is necessary to enter the drawing.
- This drawing is administered by PRR, 1501 4th Ave, Suite 550, Seattle, WA 98101, and sponsored by the King County Wastewater Treatment Division.
- You are eligible to enter if:
- You are 18 years of age or older; and
- You are not an employee of King County Wastewater Treatment Division or PRR; and
- You complete the survey by August 31, 2025.
- Each person can enter the drawing only once.
- The odds of winning are based on the number of eligible drawing entries. For example, if 100 people enter the drawing, you would have a 1 in 25 chance of winning. If 1,000 people entered, you would have a 1 in 250 chance of winning.
- Winners of the $50 gift cards will be chosen within six weeks of the survey closing and will be notified via email or phone within two months of the survey closing.
- Winners will be selected through a random drawing from among all eligible drawing entrants.
- Winners do not have to be present for the drawing.
- Winners’ contact information will not be used in any publicity or promotional materials.
- Winners may need to report the cash value of the prize to the Internal Revenue Service as part of their earnings.