Seismic Vulnerability Analysis and Upgrade of Seattle Metro Wastewater Facilities

by Donald Ballantyne, Kennedy/Jenks/Chilton, Federal Way, United States,
Ronald Rosie, Kennedy/Jenks/Chilton, Federal Way, United States,

Document Type: Proceeding Paper

Part of: Lifeline Earthquake Engineering


The Municipality of Metropolitan Seattle, Metro, provides wholesale wastewater transport and treatment for 30 cities and sewer districts. A Seismic Vulnerability Assessment Worksheet for pumping stations was developed to focus data gathering on potentially vulnerable facility components and on structural systems. Buildings at treatment plants and pumping stations were evaluated. An earthquake damage mitigation program prioritized recommendations into three groups. The highest priority was given to measures to correct deficiencies relating to life safety and health, such as hardening of chlorination systems. Water quality, anchorage of equipment and piping, and other moderate cost improvements received the next priority. Very costly measurers received the lowest priority.

Subject Headings: Seattle | Washington | United States

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