The Metropolitan Water District‘s board of directors voted Tuesday to invest $6.76 million to develop a 1-megawatt solar power generating facility on six acres at the district’s Joseph Jensen Water Treatment Plant in Granada Hills. The solar installation is expected to produce 2.3 million kilowatt-hours of clean, renewable energy a year, enough to power about 325 homes, according to the MWD. As part of Tuesday’s action, Metropolitan’s board awarded a $4.88 million contract to Riverside-based Sol Construction Co. to construct the solar facility. Construction is slated to begin next month, with plans to start up the solar plant in late 2017.