Multnomah County Drainage District #1

Acres 8590 
Landowners 1768
Pump Stations 5
Miles of Levee 13
Miles of Ditches and Slough 26.1

Founded in 1917, Multnomah County Drainage District # 1 is the largest of the 4 drainage districts along the south bank of the Columbia River in Multnomah County.  The district includes commercial and industrial enterprises, agricultural, residential development, golf courses, sloughs, and lakes. The larger properties in the area include the Portland International Airport and Blue Lake Park.  This district lies within 3 jurisdictions: the City of Portland, the City of Fairview, and the City of Gresham.

2019 Annual Landowner Meeting & Open House

As a landowner in MCDD, your property is assessed to pay for the system of levees, ditches, sloughs, and pump stations that manage storm water and reduce the risk of flooding for your property. These assessment fees show up in your property taxes each year. Participating in our board elections is a fast and easy way to help us respect your tax dollars.

Why participate?
Attending our annual landowner meeting gives you the opportunity to participate in the management of the flood control system that protects your property. Learn about our operations, projects and programs, and elect the board of supervisors responsible for budgeting and policy-making in the district.

As an informed landowner, you can help us protect families, businesses and their property from flood related damage.

When: March 28, 2019, 6:00—7:30PM
Where: Colwood Golf Course, 7313 NE Columbia Blvd.

See full meeting details here

If you would like to learn about MCDD’s board members, check out our Board Members page.

MCDD FY 2017-2018 Auditor’s Report

MCDD FY 2018-2019 Approved Budget

MCDD FY 2018-19 Budget Narrative–  This narrative explains the key items from the budget. It includes the district mission and overview, key issues facing the district, key items from the budget presented with pie charts, and assessment methodology.

If you would like to access past board meeting minutes and agendas, go to our Meeting Materials page.


MCDD is largely funded by landowners within the Districts who pay an annual assessment fee to support MCDD operations and floodplain management. If you received a letter about an assessment miscalculation in 2017-18 fiscal year, please visit our Frequently Asked Questions page for more information, or call 503-290-3569.

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