Timeline of Hetch Hetchy water and power system (2006-2030)

  2006 – 2030: Today and beyond   – Hetch Hetchy system provides high-quality drinking water to 2.5 million Bay Area residents; 85% of water comes from High Sierra -Hetch Hetchy hydropower delivers about 1.7 [...]

Timeline of Hetch Hetchy water and power system (1935-2005)

1935-2005: Expanding and improving the Hetch Hetchy system   1930′s-1970′s- Additional San Joaquin and Bay Division pipelines completed 2002- Voters approve bond measure to rehabilitate water system 2006-2030: Today and beyond (click to see more) [...]

Timeline of Hetch Hetchy water and power system (1914-1934)

1914-1934: Building the Hetch Hetchy system   1919-1923- Hetch Hetchy Reservoir built 1921-1925- Moccasin Powerhouse, tunnel and penstocks built 1930- San Francisco purchases Spring Valley Water Co. for $40 million 1934- First Hetch Hetchy water [...]

Timeline of Hetch Hetchy water and power system (1906-1913)

1906 – 1913: Securing water rights in the high Sierra   1910- San Francisco voters pass $45 million bond measure to build water system 1912- Preliminary design for Hetch Hetchy system; Michael O’Shaughnessy hired as [...]

Timeline of Hetch Hetchy water and power system (1850-1906)

1850 – 1906: A growing city needs a reliable water supply   1899- US Geological Survey recommends Tuolumne river as water source 1906- San Francisco earthquake and fire 1906-1913: Securing water rights in the high [...]

Reducing food waste

In the U.S., people waste about 40% of all edible food…

Shopping tips for “green” hardwood floors

Eco-friendly flooring options abound in the market. Many hardwood floors are made from recycled, reused and renewable materials…

CleanPowerSF program

CleanPowerSF plans to offer 100 percent renewable energy which includes wind, solar and other renewable sources to the City’s customers…

California snowpack falls sharply

The Department of Water Resources started to measure the state’s snowpack water content…

Climate change in California’s Bay-Delta

USGS Report: How California’s interconnected San Francisco Bay and Sacramento-San Joaquin Delta is expected to change in response to global warming…