Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
Seattle Public Utilities (SPU) entered into a Consent Decree in 2013 to reduce combined sewer overflows and work towards eliminating sanitary sewer overflows. A major cause of sewer overflows in Seattle is structural failure. It is also a growing concern given that the City’s 1,420 miles of sewer pipes have an average age over 80 years and pipe rehabilitation has been historically underfunded. SPU increased pipe inspection and rehabilitation funding upon signing the Consent Decree, but recognized that there would need to be a holistic look at pipe rehabilitation to ensure long-term system reliability.
This presentation walks through SPU’s work to develop and secure funding of a long-term rehabilitation plan for its aging sewer system. This planning effort was not a single event, but a concerted effort through a series of strategic projects over four years; with each strategy building on one another. Participants will learn about SPU’s strategies for pipe inspection, condition evaluation, risk assessment, capital investment, and implementation planning. Particular focus will be spent on key aspects of the process such as incorporating service equity, increasing efficiencies, securing staffing for implementation, and preparing for adaptive management. This presentation will leave participants with a roadmap for how to move from a reactive to proactive rehabilitation program. It was not a simple and quick solution, but has set SPU up for reliable and sustainable long-term sewer service.
11:15am - 12:00pm
Klamath Falls Evaluates What to Do With Its Final Effluent
Randy Zollinger, Nigel Beaton, Eva Steinle-Darling
In response to lower nutrient and temperature limits for continued river discharge, the City of Klamath Falls evaluated 100% reuse against continue river discharge. The City is looking for economical, long-term strategies that beneficially uses City’s final effluent, offers some regulatory certainty and promotes partnerships in addressing Upper Klamath River water supply and water quality concerns. This presentation will discuss reuse to augment agricultural irrigation needs involving the US Bureau of Reclamation, the Klamath Drainage District and the Lower Klamath National Wildlife Refuge. Under this reuse alternative, the City would divert its final effluent over the entire year to the Klamath Drainage District who in turn would beneficially use and manage the final effluent to meet irrigation demands of local growers and to help the Lower Klamath National Wildlife Refuge maintain habitat for migrating waterfowl. Reuse water management plans, permitting strategies and needed improvements to the City’s existing Spring Street Wastewater Treatment Plant to support a 100% reuse option will be reviewed and compared to a continued river discharge alternative. Critical factors in alternative selection will be discussed so other Cities facing similar water quality challenges may benefit from City of Klamath Fall’s experience.