The plants, which will be retired by the company’s subsidiary Monongahela Power, are the Albright Power Station, the Willow Island Power Station and the Rivesville Power Station.

These regulated power plants have a total capacity of 660MW and the facilities have served mostly as peaking facilities, generating on average less than 1% of the electricity produced by FirstEnergy over the last three years.

The decision to close these facilities is related to the impact of new environmental rules and is based on the US Environmental Protection Agency Mercury and Air Toxics Standards and other environmental regulations.

The move follows FirstEnergy’s decision last month to retire six other coal-fired power plants in Ohio, Pennsylvania and Maryland by 1 September 2012.