Comprehensive Flood Hazard Management Plan

Cowlitz County Planning Department is hosting three Open Houses in February to increase Flooding Awareness and collect feedback on the Flood Hazard Plan update

Please take a short survey to help with flood preparedness: 

Residents are invited to learn about flood hazards and participate in updating the Flood Hazard Management Plan through three upcoming open houses. Learn about flood risks facing property, travel routes and work and school locations using state of the art Hazus modeling software. The community may provide input and learn about the plan update process. Representatives from FEMA and local government will be in attendance.  

  1. Central (Kelso, Longview, Lexington, Rose Valley): Wednesday, Feb. 15, 4-7 pm County Administration Building, 207 N. 4th Ave Kelso
  2. North (Castle Rock, Sliver Lake, Toutle, Ryderwood): Thursday, Feb. 16, 10 am- 12:00 pm   Department of Natural Resources (DNR): Building 601 Bond Rd. Castle Rock
  3. South (Kalama, Woodland, Ariel, Cougar): Thursday, February 16,    4 pm- 6 pm Cowlitz Fire District 5, Station 2 – 415 Todd Rd.  Kalama

 During the open houses, attendees will be able to look up their property using state of the art modeling software to understand risks of flooding, review the proposed plan updates and provide feedback to the county. Experts will be available to answer questions and provide additional information about the plan update process. The Flood Hazard Management Plan is an important document that helps guide the county's efforts to reduce flood risks and protect the community. The county encourages all members of the community to attend one of the open houses and provide input on the plan updates.

For more information, please contact the Cowlitz County Building and Planning Department:

Contact: Adam Trimble, Senior Planner

(360) 577-3052  ext 6664

The Cowlitz County Comprehensive Flood Hazard Management Plan is a collaborative project led by the County wi1988 plan imageth assistance from local cities, diking districts, restoration specialists, community leaders, emergency responders, and more. The project is funded with a grant from FEMA, though the Washington Department of Ecology.

Updating Prior Flood Management Plans

The product will be an actionable ten year management plan that identifies vulnerable areas and potential solutions to reduce loss of life and property due to flooding and inundation.  Timeline is June 2021- June 2023

Mission, Goals and Objectives

Our mission is to continually improve our understanding of flood hazards, vulnerabilities, and community development patterns, and to work cooperatively with all levels of government and stakeholders to coordinate mutually beneficial mitigation strategies that protect public life, safety, and property, while being cost-effective, environmentally conscious, and promoting resiliency and sustainability. We will use the best available data, science, and local knowledge to plan for current and future conditions, and integrate floodplain management goals and objectives into other plans and programs. Our goal is to provide feasible, cost-effective flood hazard protection that enhances or restores the natural and beneficial floodplain function, enhance emergency response capabilities and sustain continuity of local emergency and government operations during and after a disaster while promoting outreach and education efforts to engage stakeholders.


Learn more:

Frequently Asked Questions:

Link (PDF)

Safety and Preparedness

Information on Floodplain regulation, safety and planning can be found here.

Map of Watersheds and City and Diking District Boundaries:

Cowlitz County Flood Plan BoundariesColumbia River Flood History