California Gov. Jerry Brown’s administration on Thursday proposed spending nearly $400 million over 10 years to slow the shrinking of the state’s largest lake just as it is expected to evaporate an accelerated pace. The plan involves building ponds on the northern and southern ends of the Salton Sea, a salty, desert lake that has suffered a string of environmental setbacks since the late 1970s. During its heyday of international speed boat races, it drew more visitors than Yosemite National Park and celebrities including Frank Sinatra, Bing Crosby and the Beach Boys.