Lower Duwamish Waterway
Source Control Areas (map)
The land area around the Lower Duwamish Waterway (LDWW) is
divided into 24 sub-basins (or source control areas) based on the
pathways that storm runoff can take as it drains into the waterway.
Ecology worked with other members of the Source Control Workgroup to
develop a Source Control Area Plan (SCAP) for each of the 24 source
control areas. The Combined Sewer Overflow (CSO) Basins are
being addressed under
King County’s and
City of Seattle’s CSO Control Plans.
The SCAP for each source control area identifies potential
contaminant sources and transport pathways that may affect
sediments. The plan evaluates the significance of these sources and
their potential for recontamination of sediments, and identifies
actions needed to control them. It also describes sampling and
monitoring that will be conducted to identify any additional
Click on the map key to view the SCAP for each source control area.
This page last updated January 12, 2017