After seven years of work, construction crews have finished building a 220-foot tall dam at Calaveras Reservoir, part of an $823 million project to bring the 1920s-era reservoir up to modern earthquake codes. The project, beset by delays and cost overruns, due to the discovery of ancient landslides and other difficulties, is a key part of the Hetch Hetchy water system, which provides water to 2.7 million people in Alameda, Santa Clara, San Mateo and San Francisco counties. Read story here: ------------ SUBSCRIBE TO SUPPORT LOCAL JOURNALISM Mercury News http://bayareane.ws/2ClQyyV East Bay Times http://bayareane.ws/2qhvSql WATCH MORE VIDEOS: https://www.youtube.com/user/Mercurynews LET’S CONNECT Mercury News Facebook @ https://www.facebook.com/mercurynews Instagram @ https://www.ier.com/EastBayTimes Show more