The Sacramento Municipal Utility District is moving forward with plans to buy a hydroelectric powerhouse and reservoir from Pacific Gas and Electric Co. for $10.4 million. In a joint statement, the local utility providers announced that the Chili Bar Hydroelectric Project — a dam, reservoir, spillway and powerhouse that generates electricity north of Placerville on the South Fork of the American River — would be changing hands after SMUD’s board of directors voted Thursday evening to greenlight the purchase. The purchase is expected to be finalized in 2020.