UPDATE: Power Restored After Large Outage

A problem with a transformer at the Chenaux transmission station, near Renfrew, is being blamed for a massive electricity outage that affected a lage portion of the Upper Ottawa Valley on Thursday.

More than 20,000 customers, both with Hydro One, and the Ottawa River Power Corporation, lost electricity at around 10:30 a.m.

The problem interrupted the power supply to the provincial grid, which feeds not only Hydro One customers, but also the Ottawa River Power Corporation.

Hydro One brought in new sources of electricity while crews were dispatched to work on the source of problem.

They tweeted on Thursday afternoon that the source was a transformer problem at the Chenaux transmission station.

Many Hydro One customers began to see service restored again shortly after 11:30 a.m.

Ottawa River Power Corporation customers started to see electricity restored again over the noon hour.

Hydro One was expecting everyone to have service again by 2:00 p.m.