Taking a look at the big picture of the Columbia Slough.  Dave Hendricks explains the challenges associated with management of the Slough at the Multnomah County Drainage District #1 offices.

A view of the berm separating the upper from the lower portions of the Columbia Slough.

Pumps used to move stormwater draining from the northwest area of Portland into the lower Slough.

The Whitaker Ponds environmental education and restoration area, and former junkyard.

Junked vehicles and piles of tires have been replaced by extensive plantings of native vegetation.  Note the supports for seedlings in the foreground.

Multiple small stormwater detention basins to slow, filter and treat runoff prior to entering the ponds have been constructed on the property.