Innovative Approaches to Temperature Tmdl Implementation in The Umatilla River Basin
Abstract:The City of Pendleton, Oregon is implementing a watershed-based approach at its Wastewater Treatment Plant (WWTP) to address the City's excess thermal wasteload allocation in the Umatilla River Basin Temperature Total Maximum Daily Load (TMDL). The watershed approach involves offsetting the WWTP thermal load through a new subsurface Soil Aquifer Treatment (SAT) outfall and converting a portion of the City's senior water rights on upstream springs for instream uses. The City's two-step temperature compliance approach improves thermal conditions in the Umatilla River for endangered salmonids and provides a cost-efficient temperature compliance approach for local rate-payers.
Document Type: Research Article
Publication date: 2007-10-01
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