労働安全衛生規則
Following an industrial accident on June 24, 1971, when a methane gas explosion fatal to seventeen workers occurred in the California Water Project's Sylmar tunnel, Fenton led the investigation in the Assembly's Committee on Industrial Safety. His investigation, and civil litigation, found negligence by the contractor (Lockheed Shipbuilding and Construction Company) and state inspectors. He was a leader promoting statutory change, notably the June 1973 California Occupational Safety and Health Act.