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Sewage spills into Cedar Mill Creek

Public asked to avoid contact with water in creek and pond

A blocked sewer line caused a sewage spill Thursday into a pond that flows into Cedar Mill Creek in Portland's West Hills.

The spill occurred near Northwest Mill Pond Road just south of Thompson Road in the Forest Heights neighborhood.

Portland maintenance crews discovered an overflowing manhole just before 10:30 a.m. and estimated the overflow at between five and 10 gallons per minute. They cleared a blocked sewer line just before noon Thursday to stop the overflow.

Warning signs are posted around the spill site. The public should avoid contact with water in the pond and in Cedar Mill Creek in the area Thursday and Friday because of increased bacteria in the water.

The Bureau of Environmental Services provides Portland residents with programs to protect water quality and public health, including wastewater collection and treatment, sewer construction and maintenance, stormwater management, and stream and watershed restoration.