Natural Hazard Mitigation Plan

Multnomah County’s Multi-Jurisdictional Natural Hazard Mitigation Plan (NHMP) focuses on mitigation strategies that will improve preparedness, mitigation, and response to natural hazardous such as earthquakes, floods, landslides, severe weather events, volcanoes, and wildfire and wildfire smoke.  For the first time, this plan includes the Columbia Corridor Drainage Districts (Peninsula 1, Peninsula 2, Multnomah County Drainage District, and Sandy Drainage Improvement Company) with the Cities of Fairview, Gresham, Troutdale, Wood Village, Multnomah County, and the Port of Portland.

Over the past year, Drainage District staff developed a list of strategies that reflect capital improvement priorities and District Drainage Master Plans, and incorporated priorities from Fall 2021 community surveys that emphasized levee improvements, monitoring and maintenance, outreach, and education.  

Public Review Opportunity

A draft of the plan has been released for public review, and your input continues to be an important part of this process.  Feedback that is provided will be used to improve the final plan and guide future updates. The deadline to provide comments is Friday, February 10, 2023. To access the draft plan and the comment form, or to learn more about the purpose and background of the plan, please visit the Multnomah County website: https://www.multco.us/em/natural-hazards-mitigation-planning.

For questions regarding the Columbia Corridor Drainage Districts’ involvement in the plan, please contact Matt Burlin at (503) 320-5370 or mburlin@mcdd.org.   

Aster Moulton (they/them)

Public Affairs and Community Relations Specialist

Multnomah County Drainage District #1 (MCDD)

1880 NE Elrod Drive Portland, OR 97211

Mobile: 971-940-6311



Mission: To enhance community safety and support the region’s vitality by reducing flood risk, maintaining our levee system, managing drainage, and responding to emergencies.

What is MCDD?  MCDD provides flood protection by maintaining the Columbia River Corridor levee system and removing stormwater for residents and businesses.  MCDD also serves three other drainage districts along the south shore of the Columbia River (Peninsula Drainage District #1, Peninsula Drainage District #2 and the Sandy Drainage Improvement Company). The four districts collectively extend from the edge of Smith and Bybee Lakes on the west, to the Sandy River on the east.