FirstEnergy Corp. on Wednesday said it expects to invest about $397 million this year on projects in its Ohio Edison service territory.

Ohio Edison serves much of Northeast Ohio surrounding the Cleveland area (separately served by the Illuminating Co. also a FirstEnergy subsidiary) and portions of the state’s central and southwest regions.

“The work we do enhances the reliability and resiliency of our electric system, further minimizing the duration and frequency of service interruptions our customers might experience,” Randall A. Frame, regional president of Ohio Edison, said in a news release. “Our results show that in 2017 we performed better than the reliability standards established by the Public Utilities Commission of Ohio, with customers, on average, experiencing about one outage a year lasting less than 90 minutes in duration.”

In 2017, FirstEnergy spent about $455 million on such projects.

Among the major projects in 2018:

• Rebuilding or replacing underground electrical equipment as part of a streetscape project along South Main Street in downtown Akron at a cost of about $4.5 million.

• Rebuilding a 138-kilovolt transmission line connecting substations in Seville and Wadsworth at a cost of approximately $7.2 million.

• Expanding a transmission substation in the Hudson area and rebuilding a 69-kilovolt transmission line at a cost of approximately $6 million.

• Replacing underground electrical circuits at a variety of locations at a cost of approximately $3.6 million.

• Inspecting more than 56,000 utility poles at a cost of about $3.5 million, with nearly 500 expected to be replaced and 1,400 repaired. This inspection process is conducted on a 10-year cycle.

• Replacing circuit breakers, switches and other equipment in multiple substations at a cost of approximately $4.3 million.

• Spending about $1.2 million repairing underground manholes and vaults in the Akron, Youngstown, Warren and Springfield areas.

• Installing remote-control equipment and completing other enhancements on more than 270 circuit locations at an estimated cost of $1.3 million.