the SVWC had been a source of constant controversy from as early as 1873, when the first attempt to purchase it was turned down by San Francisco voters because the price was too high. Other sources claim that as one born into wealth and classically educated, Bourn was partially motivated by a sense of civic responsibility. Prior to completion of the Hetch Hetchy Aqueduct in 1934, half of San Francisco's water supply, approximately 6 million gallons per day passed through the Sunol temple. The SVWC, including the temple, was purchased by the city of San Francisco in 1930 for US$40 million. In 1932, a new city charter was adopted which established the San Francisco Public Utilities Commission. At the time of its formation, the Commission was responsible for the Hetch Hetchy Project, San Francisco Municipal Railway, Water Department, and Airport. The Airport was later transferred out of the SFPUC to the newly formed Airport Commission in 1971. Similarly, in 1994 the Municipal Railway was moved out to the separate Public Transportation Commission. Structure and leadership The SFPUC is headed by a board consisting of five Commissioners, who are nominated by the Mayor of San Francisco and confirmed by the San Francisco Board of Supervisors. Each of the five Commissioners is chosen according to criteria set forth in the San Francisco City Charter: Seat 1 on the Commission shall be a member with experience in environmental policy and an understanding of environmental justice issues. Seat 2 shall be a member with experience in ratepayer or consumer advocacy. Seat 3 shall be a member with experience in project finance. Seat 4 shall be a member with expertise in water systems, power systems, or public utility management, and Seat 5 shall be an at-large member. The Commission meets on the second and fourth Tuesdays of each month. Their responsibility is to provide operational oversight in such areas as rates and charges for services, approval of contracts, and organizational policy. The board appoints a General Manager as the chief executive of the SFPUC, with each division headed by an Assistant General Manager (AGM). The six divisions are: Business Services, External Affairs, Infrastructure Division, Power Enterprise, Water Enterprise, and Wastewater Enterprise. Controversy SFPUC director, since 2012, Harlan Kelly, resigned 30 November 2020, charged with accepting bribes from a contractor. Environmental sustainability With the goal of improving sustainability and the city of San Francisco's goal to