MCDD

The Multnomah County Drainage District (MCDD) helps protect lives and property from flooding by operating and maintaining flood management systems for nearly 13,000 acres of land along the Columbia Slough and the lower Columbia River. We manage and maintain flood control systems such as levees, pump stations, and flow control structures that reduce flood risk for residential communities and vital public infrastructure such as the Portland International Airport, sections of I-5, I-205, and I-84, and Oregon's second largest supply of drinking water.

Also known as: Multnomah County Drainage District

Primary location: Portland United States