The Jasper high school closed around 11:30 a.m. after suffering through sporadic power outages throughout the day.
Jim Smith, transportation and maintenance manager for Jasper City Schools, said the disruption in power was caused by underground power lines malfunctioning.
Smith said problems with the line became evident around 7 p.m. Tuesday. An Alabama Power repair crew was called in to fix the problem. However, the repairs required the school's power and water to be shut off.
Jasper City School Superintendent Robert Sparkman said the lines being replaced were between 40 and 50 years old.
"They were just so old power was going on and off," he said.
Sparkman said the power line being replaced is the main power feed for the school. Though some buildings in Walker High School's campus were not affected, the vast majority of the school was without power, he said.
By Wednesday afternoon, workers with Alabama Power were digging three feet into the ground near the school's greeting sign. Sparkman said the bulk of the old underground power line will be replaced.
Representatives with the Jasper City Schools said Wednesday they expected repairs to be complete that night. Sparkman said he is certain the repairs will be far enough along for Walker High School to continue classes today.