Funding will be the key to one of the largest dam removal projects in California history. State government officials and the California American Water Co. agreed on Jan. 11 to remove the 106-ft-tall San Clemente Dam on the Carmel River in Monterey County. The concrete arch dam, built in 1921, once provided drinking water to Monterey Peninsula residents, but its reservoir has since silted up 90%. In 1991, state dam inspectors also concluded the dam risked failure in a significant earthquake or flood event, which could release an estimated 2.5 million cu yds of sediment and more than 40 million
The 2016 Summer Olympics boating and swimming events have put an international spotlight on what has been a long-running problem in Rio de Janeiro—untreated sewage and trash are clogging up major bays and waterways.