Skip to main content
King County logo

The CSI program looks at ways to improve the conveyance system and address public health concerns, while ensuring that the system has sufficient capacity to respond to regional growth.

King County’s regional conveyance facilities are located throughout the County’s wastewater service area and include over 390 miles of regional conveyance pipes, 47 pump stations, and 25 regulator stations.

Since 1999 the Conveyance System Improvement (CSI) program has focused on guiding major upgrades and improvements to King County-owned regional wastewater facilities.

Summary: Forty-one conceptual CSI projects were developed to address the capacity needs of conveyance facilities in the separated sewer portion of the regional wastewater system. Ten conceptual projects are located in the Northeast Lake Washington Planning Area and six in the Hidden Lake Planning Area. The number of projects in other planning areas range from zero to four.

The locations of the projects in each of the planning areas are displayed below.

0705_locations-csi-projects_600Figure 2-1. Locations of Conceptual Conveyance System Improvement Projects in the Separated Sewer Service Area.

Learn more about the 2017 CSI Program Update.

Conveyance System Improvement

For more information, please contact:

Steve Tolzman

Steve Tolzman
Capital Project Manager