Beginning Monday, June 20 Golden State Water’s contractor, Precision Pipeline Inc., began installation of a new water main on the south side of Twelfth Street between Indian Hill Boulevard and Cambridge Avenue, according to the city of Claremont. The work will require Twelfth to be reduced to one lane of traffic however a flagman will be present to assist traffic. The work is expected to take six weeks. COURIER photo/Steven Felschundneff