T-18 Stormwater Management and Infrastructure Improvements
Client: SSA Terminals (Seattle Terminals), LLC
Overview of Floyd|Snider Contributions
Project Summary
SSA Terminals (Seattle Terminals), LLC (SSA Terminals) operates a 200-acre marine container terminal at the Port of Seattle’s Terminal 18 in Seattle, Washington.
SSA Terminals (Seattle Terminals), LLC (SSA Terminals) operates a 200-acre marine container terminal at the Port of Seattle’s Terminal 18 in Seattle, Washington. Facility operations require coverage under the NPDES Industrial Stormwater General Permit (ISGP) for stormwater discharge. Permit benchmark exceedances for copper and zinc triggered Level 2 and 3 Corrective Actions, requiring implementation of structural source control and treatment best management practices throughout the facility. SSA Terminals entered into an Administrative Order (AO) with Ecology and a third-party Consent Decree (CD) to perform source control and install stormwater treatment infrastructure over a multiyear three-phase approach. SSA Terminals successfully completed all phases of the stormwater improvement program and is now fully compliant with the AO, CD, and ISGP.
Our Approach
Floyd|Snider led stormwater treatment alternative analysis and selection, authored the Engineering Report for all three phases, and supports long-term operation and maintenance of 10 individual treatment systems that range in flow rates from 100 to 1,400 gallons per minute. Through coordination with project team members, Floyd|Snider led the development strategy to consolidate drainage basins and select treatment systems based on capital and long-term operating costs, ability to meet benchmarks, and least disruption to facility operations. Floyd|Snider also led source control efforts and provides ongoing permit compliance support, which has resulted in consistent attainment of permit benchmarks in discharge from these systems.
Project Milestones
2016. Phase 1: completed stormwater treatment for 80 acres
2018. Phase 2: completed stormwater treatment for 45 acres
2021. Phase 3: completed stormwater treatment for 55 acres
Our Approach
Floyd|Snider provided strong project leadership to SSA Terminals through engagement with Ecology for regulatory compliance and leading the project team from treatment concept development through design, permitting, contractor selection, and construction oversight. Floyd|Snider led stormwater treatment alternative analysis and selection, authored the Engineering Report for all three phases, and supports long-term operation and maintenance of 10 individual treatment systems that range in flow rates from 100 to 1,400 gallons per minute. Through coordination with project team members, Floyd|Snider led the development strategy to consolidate drainage basins and select treatment systems based on capital and long-term operating costs, ability to meet benchmarks, and least disruption to facility operations. Floyd|Snider also led source control efforts and provides ongoing permit compliance support, which has resulted in consistent attainment of permit benchmarks in discharge from these systems.
Project Milestones
2016. Phase 1: completed stormwater treatment for 80 acres
2018. Phase 2: completed stormwater treatment for 45 acres
2021. Phase 3: completed stormwater treatment for 55 acres
Project Team
We have partnered with Floyd|Snider on several stormwater treatment projects at industrial sites and have been impressed with their professionalism and dedication. They remain fully engaged in our projects and take ownership of deliverables. Much of our project success is attributable to their superior project management and leadership.