PORTLAND, Ore. – An estimated 27,000 gallons of sewage spilled into a Southwest Portland creek and flowed into another creek on Sunday.

Maintenance crews responded to a reported odor in the 6100 block of Southwest Canby Street and found sewage spilling into Woods Creek, which flows into Fanno Creek, according to the Portland Bureau of Environmental Services.

Crews stopped the sewage flow by diverting it to another line, but not before approximately 27,000 gallons spilled into the creek.

Crews posted warning signs along both creeks.

The bureau determined that the sewage came from a privately owned pipe designed to only carry rainwater to the creek. A private sewage pipe was mistakenly connected to it.