Event detail icon
Comment Period

Snohomish Basin (WRIA 7)

Geographic Response Plan (GRP)

Sept. 14, 2022 - Oct. 14, 2022, 5 p.m.

GRPs are used to guide early response actions in the event of an oil spill. Ecology develops and updates GRPs in collaboration with state, local and federal agencies and tribes.

The Washington Department of Ecology is updating the Snohomish Basin (formerly WRIA 7) Geographic Response Plan (GRP). An important part of the update process is hearing from the people who live, work, and play in the GRP area. To facilitate this, a public comment period will be open from September 14 to October 14, 2022.

View the draft sections here: https://fortress.wa.gov/ecy/ezshare/sppr/preparedness/SnohomishBasinGRP/SnohomishBasinPublicCommentPeriodCoverPage.pdf 

Description of the Planning Area

The Snohomish Basin, also called Water Resource Inventory Area 7 (WRIA 7), consists of three main river systems and numerous tributaries. The headwaters of the Skykomish River and Snoqualmie River form in the mountains of the Cascade Range. These rivers flow west and converge to form the Snohomish River in the floodplains of the Snohomish Basin. The Basin drains 1,900 square miles from the west crest of the Cascade Range to Puget Sound near Everett, Washington. There are 2,718 miles of rivers and stream in the Basin. It is the second largest basin draining into Puget Sound. 

The Snohomish Basin includes the northeastern portion of King County and the south-central portion of Snohomish County. The Basin is located north and east of the Seattle metropolitan area. The North Central Puget Sound GRP neighbors the Snohomish Basin GRP to the west and north.

What are Geographic Response Plans?

Geographic Response Plans (GRPs) are used to guide early response actions in the event of an oil spill. Ecology develops and updates GRPs in collaboration with state, local, and federal agencies and tribes. Each GRP is written for a specific area — for example, a river, a lake, or section of Puget Sound. Each GRP includes tactical response strategies tailored to a particular shore or waterway at risk of injury from oil.

GRPs have two main objectives:

  • Identify sensitive natural, cultural, or significant economic resources at risk of injury from oil spills.
  • Describe and prioritize response strategies in an effort to reduce injury to sensitive natural, cultural, and certain economic resources at risk from oil spills.

More information

Comment online icon

Comment online

Comment by mail icon

Comment by mail

Nora Haider
Dept. of Ecology, Spills Program
PO Box 330316
Shoreline, WA 98133-9716
Questions icon


Nora Haider
Oil Spill Preparedness Planner

To request ADA accommodation, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, or call 360-407-6831, 711 (relay service), or 877-833-6341 (TTY). More about our accessibility services.