Heavy rain triggers sewer overflow into Willamette River : v

A Combined Sewer Overflow occurs when Portland's Big Pipe system reaches 100% capacity, causing the excess storm and sewer water to spill into the Willamette River.

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, Portland Bureau Of Environmental Services , Heavy Monday , Sewer Overflows , Big Pipe , Willamette River , Portland Bureau , Environmental Services , Combined Sewer Overflow , Big Pipe Tracker , Columbia River , North Portland ,