Herrera is working as part of a team to provide design-build services to the Washington State Department of Transportation (WSDOT) for the SR 99 Bored Tunnel / Alaskan Way Viaduct Replacement Project. Starting with the design-build project submittal, Herrera provided permitting and environmental compliance strategy to support an aggressive construction timeline – a full year ahead of WSDOT’s anticipated schedule. Herrera also provided guidance on contaminated site cleanup options, water management and treatment practices, and environmental compliance oversight activities. After project award and during preliminary and final design, Herrera strategized, prepared and submitted applications, and provided post-submittal agency coordination for the King County Industrial Wastewater Discharge permit (King County); the NPDES Stormwater Construction General Permit (Ecology); as well as several minor permits, including a request for chemical treatment for stormwater (Ecology). Herrera also provided on-call support for the Street Use permit, which is the primary permitting vehicle for the tunnel project.
Herrera participated in weekly permit strategy meetings, coordinating with staff from Seattle Tunnel Partners, WSDOT, and Seattle Department of Transportation (SDOT) to assure a smooth process, and to obtain timely review of permit submittals and approvals. Herrera also created and maintained an environmental commitments database, tracking permit and other commitments through the design and construction process from initiation through close-out. Commitment updates were provided monthly to the environmental compliance team. Herrera is also providing ongoing on-call technical support in stormwater and water management and hazardous materials management, as requested.