After 52 years of generating energy for the Black Hills, one of Rapid City's biggest power plants celebrates its legacy.
But the celebrations of five decades of service is also bittersweet.
The Ben French power plant will officially close in 2014.
Seven local employees will be transferred to bigger plants in Gillette, Wyoming.
Black Hills Power officials say its simply not economical to retro-fit the plant to bring it up to current Environmental Protection Agency standards. They say, it may also be cost effective to utilize other sources of power.
"We won't have to pay fuel transportation costs, so we transport fuel more economically from those plants in Gillette," said Mark Lux, Vice President of Power Delivery for Black Hills Power.
Black Hills Power workers say the plant will still be available to generate electricity if needed in an emergency situation.