Faced with the rapid spread of golden mussels across California waterways, state and federal officials are imposing strict new measures at Folsom Lake and Lake Clementine to prevent the invasive species from taking hold. Beginning Monday, all trailered or motorized boats at the two popular Sacramento-area lakes will be required to undergo inspection and a mandatory 30-day quarantine before launching. Golden mussels, native to Asia, were first detected in California waters last fall in the Port of Stockton. Since then, they have spread rapidly through connected waterways, reaching as far south as Bakersfield. Officials warn that the freshwater mollusks threaten California’s water infrastructure, power systems and aquatic ecosystems by clogging pipes, outcompeting native species and damaging boats by attaching to hulls and clogging engines.