Monticello Creek Watershed Restoration

We Want to Hear From You!

The City of Redmond invites you to get involved in the Monticello Creek Watershed Restoration Plan. Your involvement is key to helping us keep your neighborhood clean and green.

Purpose of the Watershed Restoration Plan

Northeast Redmond is one of the most rapidly growing parts of the city. This growth has many benefits, but it can also affect water quality and wildlife habitat, and it can result in increased flooding and erosion.

Increases in impervious surfaces associated with urbanization (e.g., roads, roofs, parking lots, etc.) result in degraded stream health, primarily because of the high volume and speed of stormwater runoff. This alters the natural flow of a stream or creek. Stormwater infrastructure can be built to reduce impacts from development and better mimic natural stream flows during storms and increase stream flow during the summer.

In 2013, Redmond approved a Citywide Watershed Management Plan, which focused resources on six priority watersheds, one of which is the Monticello Creek Watershed. We are committed to fully restoring Monticello Creek to make it healthy for aquatic life and a valuable natural asset for the people who live, work, and play in Redmond.

The first step in developing the Monticello Creek Watershed Restoration Plan is to identify and prioritize improvement projects. The Restoration Plan will identify potential stormwater retrofit and in-stream projects that will improve flow, water quality and habitat of the creek.

The projects in this plan will aim to: ​

  • Enhance the stream channel and improve fish and wildlife habitat.   
  • Enhance stream banks (with native trees and shrubs) to improve fish and wildlife habitat.
  • Control flooding and prevent erosion in the neighborhood (if any) to restore natural flow in Monticello Creek.
  • Clean up stormwater runoff to prevent pollutants from entering our streams.   
  • Repair or replace failing pipes to make sure our stormwater management systems are protecting the environment and property from flooding.

Proposed Projects

At this stage in our planning process, we are evaluating which stormwater retrofits and in-stream habitat projects are preferred by the community, effective at restoring the creek and feasible to implement. Our selection criteria include:

  • Environmental effectiveness
  • Neighborhood impacts
  • Cost

The City will consider a variety of projects, which might include:

  • The expansion of existing stormwater storage ponds or vaults
  • Constructing new ponds or stormwater vaults
  • Adding Low Impact Development approaches, such as rain gardens, bioswales or Filterra systems
  • Installing in-stream habitat enhancement
  • Natural area restoration

The plan will be supported by a robust monitoring program providing baseline information that will confirm modeling for project designs. Additionally, monitoring will be used to evaluate the effectiveness of constructed projects. With continuous monitoring and periodic updates to the plan, a progression of improvements can be documented and the program can change course, if needed.

Community Benefits

Ultimately, a group of projects will restore the ecological health of the stream, bringing back larger populations of Coho salmon, cutthroat trout, and other fish, and preserve and restore open space surrounding streams and wetlands. This healthy stream will be a valuable asset for our community for generations to come!

Potential Impacts to Neighborhoods and Residents

How will I be impacted? Will there be construction projects in my neighborhood?

The City will have a better sense of how the neighborhood will be affected once the priority treatment facilities are identified. At that point City staff will reach out to affected residents.

If I don’t have any flooding on my property, how will this help me?

This is an opportunity to restore Monticello Creek to a healthier, functioning ecosystem, which could enhance salmon and other wildlife to the area for you and your kids to enjoy in the future. Treatment facilities will also control the flow of water throughout the watershed, which will help reduce street flooding and make it safer to drive and walk during and after large rain events.

Fieldwork in the Area

In order to begin planning the Monticello Creek projects, we may be conducting field investigations in your neighborhood. Initial efforts will primarily look at conditions of the stream channel and road crossings, along with studying soils at road cuts and development projects. After project types and locations are identified there will be more detailed geotechnical investigations and a site survey at a few locations to inform project design.

Thank you for your patience as we conduct this work.

What is the purpose of the fieldwork?

We are conducting different types of fieldwork to identify and collect data. The data from this exploratory work will help us develop the project designs. The work we are doing includes:

  • Environmental reconnaissance: assess terrain, plants and wildlife
  • Geotechnical investigation: identify soil conditions and testing how fast water soaks into the soil
  • Later phases of design will involve survey and potholing to more precisely map surface conditions and refine soil types and utility locations.

Preliminary Timeline

Redmond is in the preliminary stages of the Monticello Creek Watershed Restoration Plan. We expect to install three priority projects in the Monticello Watershed. At this stage in our planning process, we are evaluating which projects are preferred treatment options.

The proposed projects will be prioritized and a finished plan produced by early 2017. We will have a better sense of how the neighborhood will be affected once the priority treatment facilities are identified. At that point City staff will conduct outreach to affected residents.

The Plan is only the first step in recovering Monticello Creek. We hope to complete design, then secure additional grant funding to install the three highest priority projects beginning in 2020. Redmond expects to complete restoration efforts in the Monticello Creek Watershed by 2025, followed by intensive monitoring of stream response.


Develop Monticello Creek Watershed Restoration Plan      2016 - 2017
Design of Specific Projects 2018 - 2020
Seek Additional Grant Funding for Projects 2018 - 2020
Construction of Projects 2020 - 2025
Plan Update 2025 - 2030

Related Planning Projects

A watershed-scale stormwater plan is currently being developed for the Bear Creek Basin in the Greater Lake Washington (WRIA 8). This area includes Monticello Creek.  The goal of this project is to produce a watershed plan that outlines actions and strategies that will restore Bear Creek to existing and designated uses, so that it provides healthy habitat for Chinook salmon and other aquatic species.

This watershed planning process is intended to create a more direct link between stormwater management and salmon recovery and identify a stormwater management strategy or strategies that would result in hydrologic, water quality, and stream channel habitat conditions that fully support existing and designated uses.

Read about the plan on King County's website: Bear Creek Watershed Scale Stormwater Plan 

How to Stay Informed

Please visit this website for the most up-to-date information on the project. Additional materials and project information will be posted on the site as the project develops.

If you are interested in receiving project emails and notifications, please let us know by emailing your contact name, address (physical and email) to:  Monticello Creek Watershed Restoration Plan.  

Emily Flanagan, 425-556-2707
Monticello Creek Watershed Plan Program Manager

Monticello Creek

Program Contact

Emily Flanagan