Oregonian

Heavy rains trigger sewer overflow advisory as Portland’s Big Pipe hits capacity

Portland’s Big Pipe hit 100% capacity Thursday after heavy rains, triggering a combined sewer overflow advisory that remains in effect for the Willamette River. The overflow began about 4:20 p.m.
KOIN 6

Big Pipe overflows into Willamette River with human waste, stormwater

PORTLAND, Ore. (KOIN) – The Willamette River is under a sewer overflow advisory after heavy rain pushed Portland’s Big Pipe to capacity on Thursday. The Combined Sewer Overflow (CSO) advisory impacts ...
Oregonian

Portland’s Big Pipe is full again. Here’s how the system works

Portland’s Big Pipe hit 100% capacity at about 6:26 a.m. Thursday. That does not mean the system failed. It means the city’s giant underground overflow tunnels filled up during heavy rain, leaving no ...