A wind farm will provide electricity for Derry and Strabane
The company received consent to create the seven-turbine project near Londonderry on Wednesday.
Barr Cregg Wind Farm will power over 20% of the district's households.
Head of wind projects for RES, Fraser Merry anticipates an injection of £7.7m into the local economy.
"We anticipated £7.77m will be spent during construction and £6m of inward investment in Derry and Strabane District Council area in the form of business rates.
"We have a track record of using local contractors to deliver our projects and look forward to working with businesses in the area to deliver Barr Cregg Wind Farm," he said.