Chapter
Apr 26, 2012
Municipal Water Systems in the Columbia River Basin: A Portfolio Management Approach for Multiple Benefits
Publication: World Environmental and Water Resources Congress 2009: Great Rivers
Abstract
The City of Gresham, Oregon has a population of 100,000 people. On the eastern edge of the Portland metropolitan area, Gresham is located on the south shore of the Columbia River. Gresham's water supply is anticipated to be adequate until at least 2050 from surface and groundwater sources. Wastewater is collected for secondary treatment. Treated effluent is discharged directly to the Columbia River. This reach of the Columbia River is designated as a temperature-limited stream under Section 303(d) of the Clean Water Act. A number of other potential nutrient and pollutant limits may affect permitted effluent discharge in the future. A draft Total Maximum Daily Load (TMDL) for temperature assigns a heat load allocation to Gresham that is projected to be exceeded by as early as 2020.
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© 2009 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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CH2M HILL, Inc., 2020 SW 4th Avenue, 3rd Floor, Portland, Oregon, 97201;. E-mail: [email protected]
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