Arboretum Waterway Improvements

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The proposed Arboretum Waterway Improvements project is a water recycling project. The purpose of the project is to improve the water quality in the Arboretum Waterway, which is stagnant, by keeping water flowing through the waterway year-round. The project would consist of re-operating an existing, but currently unused, 18-inch pipeline to circulate tertiary-treated water from the existing campus wastewater treatment plant (WWTP) through the Arboretum Waterway before discharging it to Putah Creek. Tertiary-treated wastewater has undergone filtration that removes additional pathogens and contaminants and meets Department of Health Services’ standards under Title 22 of the California Code of Regulations for unrestricted recycling uses. The campus’s wastewater already is being discharged to Putah Creek, so the project would extend the route that the wastewater takes before discharge. The project would involve installation of two valves, a connecting pipeline, and an outfall structure in order to accomplish the project purpose.