Information About the Emergency Water Intertie With the Lake Oswego Water System
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Intergovernmental Agreement (IGA) was formed and 1984 and renewed in 2003.
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IGA is between South Fork Water Board, the City of West Linn, and the City of Lake Oswego.
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IGA covers the emergency water system intertie between the three entities.
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The emergency water system intertie is located near the intersection of Old River Rd and Kenthorpe Way in the Robinwood Neighborhood of West Linn.
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Originally constructed in conjunction with the reconstruction of West Linn’s main transmission main going across the Interstate 205 Bridge which serves all of the City of West Linn.
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The connection is an 18-inch intertie main approximately 800 feet in length connecting West Linn’s 18-inch main on Highway 43 to Lake Oswego’s 24-inch main on Kenthorpe Way.
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Emergency water is defined as an occurrence which jeopardizes water quality, whereby insufficient supply threatening the health or safety of customers.
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Utilization of the water intertie is triggered by mutual consent of the executive officers.
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Cost of the water is charged at the wholesale rate currently being paid to South Fork.
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City of West Linn owns the intertie and pays for normal operating and maintenance.
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Repairs, replacement, and modifications are shared by parties based upon benefit.
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West Linn water reservoir capacity is 5.5 million gallons, Lake Oswego’s is 27 million gallons, and Oregon City’s is 18 million gallons.
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West Linn uses approximately 8 million gallons of water during a peak summer day.
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The emergency water intertie benefits West Linn because Water Master Plan projects cost less because we can rely on LO’s capacity.
