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Water Conveyance

MULTNOMAH COUNTY DRAINAGE DISTRICT / WHAT WE DO / DISTRICT SERVICES / WATER CONVEYANCE
an icon representing WATER CONVEYANCE

To keep the land behind the levees dry, the Districts manage a complex series of sloughs, pipes, and culverts that feed into pump stations and move water away from the managed floodplain into the Columbia River and lower reaches of the Columbia Slough. This work involves monitoring and maintaining pump stations, clearing debris and other blockages from the conveyance system, and attending to wildlife activity when necessary.

District employees operate and maintain a total of 12 pump stations. Nearly all pump stations are connected to a Supervisory Control and Data Acquisition (SCADA) system and three in-stream monitors (ISMs) that identify water elevations at specific points throughout the District’s drainage system. Via SCADA, District employees can monitor water elevations, check which pumps are running, weather conditions, and turn pumps on and off remotely.

In the case of waterways that are under private ownership, the District works with landowners to support their efforts to make drainage improvements.  Property owners experiencing drainage issues may contact the District office at 503-281-5675.

TRAFFIC ALERT: Expect delays at the intersection of NE Marine Drive and NE 122nd Ave Sep 30 - Oct 30, 2019. Click here for more information.