Agency: Sound Transit Authority
Soteria’s Role: Communications, Signals, andTraction Power Substation (TPSS), Reliability Program Plan & TPSS Demonstration Test Plan and Procedures
Completion Date: Scheduled for 2024
Project Overview
This project extends Sound Transit’s light rail from Angle Lake Station in the city of Seattle/Tacoma to the Federal Way Transit Center, and further to a temporary maintenance facility for vehicle inspection and interior cleaning at the southerly end of the track. Guideway types on this project include at-grade, retained fill, retained cut, and elevated structure.
Three stations will be built: Kent/Des Moines Station, Star Lake Station, and FWTC Station. The project’s scope of work includes all civil, structural, architectural, landscaping, artwork coordination, mechanical, electrical, plumbing, and systems elements to provide a fully functioning light rail extension.
Soteria’s Contribution
Soteria developed a Preliminary Hazard Analysis and a Threat and Vulnerability Assessment in support of the safe operation of Project 2B. For the Glendora to Montclair segment, Soteria developed the Preliminary Hazard Analysis (PHA) to identify and systematically assess conditions that could potentially affect the safe operation of the transit system. The PHA identified hazardous conditions, documented the safety concepts and mitigating measures, provided a checklist for guiding the design, and provided a basis for requiring more detailed safety analyses and testing for specific system elements and subsystems.
Soteria developed the project’s Threat and Vulnerability Assessment (TVA) to craft an effective set of risk-reducing security mitigations to be integrated into the Gold Line Foothill Extension Project 2B design, construction, startup and operations. The assessment process allowed for mitigations to be chosen for optimal safety and be tailored for the identified risks to project assets for transit agency patrons and employees. The TVA also provided a framework to quantify and then rank the potential risks for the occurrence of various detrimental security events. The proposed protective countermeasures, when implemented correctly, serve to minimize risk across a wide range of security events, making possible an overall safer and more secure transit system.
