Crews, geologists find cause of hole on Hwy 26

It was an old pipe that wasn't properly decommissioned

The hole discovered on the side of US 26, March 2 2017. (ODOT)

PORTLAND, Ore. (KOIN) — The Oregon Department of Transportation have investigated a small hole that opened on the eastbound side of US 26 between the Zoo and Jefferson Street off-ramp.

Geologists and ODOT workers inspected the 5-foot opening that was found late Thursday night. They used a sewer camera to determine the hole was caused by an abandoned pipe about 15 down. The pipe was not properly decommissioned .

City of Portland crews will be working on the best way to plug it.