More than 60 classes are expected to be canceled at Diablo Valley College in Pleasant Hill Thursday after construction work led to a power outage in parts of the sprawling campus.

Power went out around 7:25 a.m. at the school's Performing Arts Center, the cafeteria, parts of the Physical Education building, and the Student Activities building, prompting three dozen classes to initially be canceled, DVC spokesman Tim Leong said.

Leong said another two dozen classes will also be cancelled through 4 p.m. due to the outage, but that power should be restored in time for evening classes.

The rest of the campus is running normally.

School officials said the outage occurred when a construction worker at the site of a new building on campus struck an underground high-voltage power line with a backhoe.

Crews were on site this morning to survey the damage and make repairs, and Leong said school officials should know when power will be restored by around 2 p.m. "

We're trying to do what we can to quickly get the power back up and restore it, and we apologize for the inconvenience," he said.

DVC students are being notified of the cancellations via email, text message and the school's website.

About 20,000 students are on the Pleasant Hill campus on any given day, Leong said.