A recreational area in southeastern Sacramento County is implementing new restrictions to protect its popular lake. It’s happening at Rancho Seco, in the town of Herald. New watercraft restrictions are now in effect to stop the spread of golden mussels recently discovered in the Sacramento-San Joaquin Delta. Signs around Rancho Seco alert people to the invasive species, saying, “Don’t move a Mussel.” No trailer-launched boats are allowed on the lake. People can still use small watercraft like canoes, kayaks, paddle boats, and smaller electric watercraft, but only if they haven’t been used in other waterways, including the Delta, within 30 days.