Photos: Tour of the 1,732-foot-long tunnel at the Anderson Dam project

Workers are about 80% finished digging a new 1,736-foot-long outlet tunnel at Anderson Dam near Morgan Hill. The work is part of a $2.3 billion project to bring the dam, which was built in 1950 and holds back Santa Clara County’s largest reservoir, up to modern earthquake standards. The Santa Clara Valley Water District, which is overseeing the project, says work to tear down the old dam and rebuild a new one will begin in 2026, with completion scheduled for 2032.