The Oven Mountain Pumped Hydro Energy Storage Project is a pumped hydro-electric scheme that will provide up to 900 megawatts (MW) of electricity generating capacity and up to 12 hours of energy storage. The project also includes a transmission connection to Line 965, the regional transmission line running between Kempsey and Armidale. The project is located on privately-owned land in the Armidale Regional Local Government Area, approximately 60 km south-east of Armidale. In October 2020, the project was declared critical State significant infrastructure (CSSI), having been deemed by the NSW Minister for Planning and Public Spaces to be essential to the State for economic, environmental or social reasons. It is anticipated the project will play a critical role in ensuring the stability of the future electricity network, complementing other local renewable energy sources, such as solar and wind.