An electrical fire Wednesday afternoon knocked out power to customers in northern Smithfield and Richmond.
According to emergency radio traffic, a power transformer blew at 1:30 p.m. near 7800 North on US-91. The explosion sparked several grass fires.
Firefighters were dispatched to the scene and had the flames extinguished within 30-minutes.
Rocky Mountain Power reports the explosion damaged several electrical lines. The outage affects almost 600 homes and businesses. They estimate that power will be restored by 4:30 p.m.