Cedar Creek Rainwater Management Project

creek photo.jpg
Project Description

The Cedar Creek rainwater management project will address water quality, creek health, and flooding concerns in the Cedar Creek basin.

City of Kirkland is in the initial study phase of the project. This phase will identify locations and develop preliminary designs for three rainwater management facilities that, when constructed, will help reduce rainwater runoff and address water quality and flooding concerns.

Location

The Cedar Creek basin is in northern Kirkland and is part of the larger Juanita Creek watershed.

 Cedar Creek basin map(PDF, 560KB)

What's Happening Now?

City of Kirkland and consultant staff are currently working to identify potential sites for rainwater management facilities in the Cedar Creek basin. This work includes:

  • Studying soil, groundwater, and creek conditions, as well as current land uses.
  • Collecting community input about drainage concerns in the area and interest in potential benefits from rainwater management facilities.
Community Benefits
  • Greener, more attractive neighborhoods
  • Lower risk of street and property flooding
  • Improved water quality for ecosystems and recreation
  • Healthier Cedar Creek and Juanita Creek
Community Engagement

We want to be sure that while meeting our water quality needs, we also meet the needs of the community. Throughout this first study phase of the project, we will engage with the community and seek public input. Help us learn about drainage issues on your property and in your neighborhood:

  • Respond to the neighborhood drainage survey
  • Participate in virtual Open Houses
  • Talk with us at neighborhood meetings
Learn about the Cedar Creek Rainwater Management Project

Why Cedar Creek basin?

Much of the area surrounding Cedar Creek was developed before we knew of the need for rainwater management. This has resulted in damage to Cedar Creek from high water flows and pollution. In addition, Cedar Creek flows to Juanita Creek, which has bacteria levels and temperatures that are too high, and oxygen levels and creek life indicators that are too low.

One strategy the City of Kirkland is using to solve this problem is to build rainwater management facilities, which reduce polluted runoff and flooding and improve water quality in areas that do not currently have rainwater management facilities. 

 

What is rainwater runoff?

Rainwater runoff is rainwater or melting snow that doesn’t evaporate or soak into the ground. Rainwater runoff carries pollutants like pesticides, fertilizers, soaps, and vehicle fluids to the nearest creek or lake, and can cause flooding and erosion downstream.

 

What does a rainwater management facility look like?

In this first phase of the project, City of Kirkland will investigate what types of rainwater management facilities to build and where within the Cedar Creek basin they should be installed.

The project is considering a wide range of options including rain gardens and underground vaults as types of facilities that may be installed.

Roadside rain gardenRain gardens slow the flow of rainwater runoff and let it filter into the ground naturally.

 

 

 

Underground vaults and wells slow the flow of rainwater runoff and allow pollutants to settle to the bottom to be cleaned out later.

Image of stormwater vault

 

Ecology Logo YSRR.jpgThis project is funded in part by a grant from the Washington State Department of Ecology