Salt Lake City-headquartered sPower says construction has begun on its 45 MW Sandstone Solar project in Florence, Arizona.

The facility, through a 21-year power purchase agreement between sPower and public power utility Salt River Project, is scheduled to start delivering energy by the end of the year.

sPower awarded the engineering, procurement and construction contract to Swinerton Renewable Energy, which will install more than 182,000 Jinko Solar photovoltaic modules on a tracking system.