library-and-resources

CSI program updates

The CSI Program has been updated in 2004, 2007, and 2017. Learn more by visiting the Program updates page.

Other reports and documents

Vulnerability of Major Wastewater Facilities to Flooding from Sea-Level Rise (2008)

King County's Wastewater Treatment Division maintains 77 major facilities, 40 of which are situated adjacent to tidally influenced water bodies. As effects of climate change continue to grow, the potential for flooding at these facilities as the result of sea-level rise must be assessed and mitigated. The first step in planning for the effects of sea-level rise is to identify which facilities are at risk. This report identifies these facilities and their potential for flooding, considering the effects of both sea-level rise and storm surges, and then recommends the next steps in planning for this change.

Vulnerability of Major Wastewater Facilities to Flooding from Sea-Level Rise Technical Memorandum (385KB)

Cruise Ship Wastewater Management (2007)

In April 2007, the King County Council passed Motion No. 12498, which directed the Wastewater Treatment Division to work cooperatively with the Port of Seattle and other affected agencies to undertake a study of the potential for processing marine cruise industry-generated wastewater through the county's wastewater treatment system.

Cruise Ship Wastewater Management Report (648KB)

Seismic Vulnerability (2002-2003)

In 1999, the King County Council directed and authorized a seismic vulnerability study to evaluate all the county's major underwater conveyance pipelines. A comprehensive approach was developed to assess the vulnerability of these pipelines to earthquake damage and to recommend short- and long-term protective action if warranted. The study, which began in May 2000, assessed pipes under Lake Washington, Lake Sammamish, the Ship Canal, sloughs, rivers, and creeks.

For security reasons, these reports are not available online. Please contact Steve Tolzman at steve.tolzman@kingcounty.gov if you wish to obtain a copy.

Maps and technical resources

GeoMapNW

GeoMapNW (formerly the Seattle-Area Geologic Mapping Project) is a University of Washington-centered project to develop a detailed understanding and representation of the distribution of geologic materials on and beneath the surface of areas around the central Puget Sound area.

The King County Wastewater Treatment Division is a partner on the project and has provided updated geologic databases and a new series of geologic maps throughout the Regional Wastewater Service Planning area.

King County wastewater service area maps

Maps are available of the King County Wastewater Service System and the Conveyance System Improvement sub-regional planning areas.

King County Wastewater Treatment Division service area maps (maintained by KC GIS Center)

Facility one-lines

Facility one-line system maps identify the King County regional wastewater conveyance system. They are available by request.

Contact Shaun O'Neil at shaun.oneil@kingcounty.gov or 206-477-4432 for more information.