entity to enforce park laws and fight against development. Muir's efforts also noted as the start of modern environmentalism. The interests of the Spring Valley Water Company were strictly profit based because they held a monopoly on San Francisco's water supply before the Raker Act. The building of the water infrastructure in the Hetch Hetchy Valley would mean they would no longer be able to control prices. The Irrigation Districts of Modesto and Turlock relied on the watershed from the Tuolumne River and the construction of a dam would limit their water supply. All of these interests combined were not enough to defeat the Raker Act because of the larger public interests in San Francisco. In the present, timing of the dam's operation has shifted to night and early mornings as solar power has limited the need for electricity production during the day and decreased energy prices. Relaxation of the Act's restrictions on who San Francisco may sell the dam's electricity to may provide more flexibility and support recreation on the Tuolumne River. Attempts to enforce Raker Act and restore the Hetch Hetchy Valley The San Francisco Bay Guardian led a multi-year effort to publicize allegations of Raker Act violations. They repeatedly stated that San Francisco sold the power to PG&E, who then resold it back to the public at a profit, in violation of the Raker Act. Harold Ickes of the Roosevelt Interior Department tried for many years to enforce the Raker Act, but he was unsuccessful. Donald Hodel, Secretary of the Interior under the Reagan Administration in 1987, directed his staff to investigate finding alternative water sources for San Francisco, drain Hetch Hetchy reservoir, and restore the valley to its natural state. In 2007, the George W. Bush Administration made an attempt to allocate funds to the National Park Service for a study into the removal of the dam and the restoration of the Hetch Hetchy Valley. See also Restore Hetch Hetchy References External links San Francisco Virtual Museum History of San Francisco 1913 in law United States federal energy legislation United States federal legislation articles without infoboxes