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Jefferson Way Stormwater Outfall Bioremediation

Jefferson Way Stormwater Outfall Bioremediation

The following project was a two-year project that was originally funded by the City and then de-funded to cover the consulting costs of another project that was also not installed.

The Water Action Team, in partnership with the OSU Biological & Ecological Engineering Student Society (, researched, developed preliminary designs, created partnerships with OSU and others, and applied for funding to create a demonstration area on case to show how stormwater can be treated by natural means before it enters a local stream.


Jefferson Way is the westerly extension of Jefferson Street in Corvallis as the street extends through Oregon State University Campus. Jefferson Way dead ends to the west behind the E.P.A. Building and the OSU Wave Building.

A Stormwater Outfall is the point at the downstream end of a stormwater pipe where the water falls out of the pipe and enters the next part of its downward journey. Generally, stormwater outfalls are adjacent to streams or rivers. Sometimes they drain to a treatment plant. Sometimes to a wetland. Sometimes into a ditch that carries the water to a stream or allows it to infiltrate into the ground.

Bioremediation – The use of biological agents, such as bacteria, fungi, or green plants, to remove or neutralize contaminants, as in polluted soil or water. Bacteria and fungi generally work by breaking down contaminants such as petroleum into less harmful substances. Plants can be used to aerate polluted soil and stimulate microbial action. They can also absorb contaminants such as salts and metals into their tissues, which are then harvested and disposed of.

The Stormwater Outfall of Jefferson Way is at the lower left-hand portion of the stormwater pipe illustration to the right. The stormwater system drains agricultural land, institutional land and residential areas, all of which include paved roads draining volatile organic compounds from automobiles. The outfall drains about 200 feet above Oak Creek, one of the few outfalls in the City of Corvallis that does not feed directly into a stream or the wastewater treatment center. The 200′ channel between the outfall and Oak Creek provides a unique opportunity to incorporate bioremediation for treating the quality of the stormwater drainage before it enters the stream. The location on OSU campus also provides a unique opportunity for research and community education.

Approval & Funding

The Project was approved by the Corvallis City Council in 2010 to be included in the 2011 Capital Improvement Project (CIP). As the result, the design and construction of the stormwater biological treatment facility is fully funded by the City’s Stormwater Fees program (not by taxes).

The City Public Works Department will be responsible for the final design and construction of the facility. The Water Action will be primarily responsible for the Outreach portion of the project. Current letters of support and partnership have been signed with the Corvallis School District, the Marys Peak Watershed Council, Freshwater Trust and various Natural Resources and Engineering Departments within OSU.


VISION: Water conservation efforts decrease the amount of water city residents use, and our creeks are clean and clear.

Jefferson Way Stormwater Outfall Bioremediation The following project was a two-year project that was originally funded by the City and then