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…
Three bin recycling
During the holiday season, there are more waste that generated by parties than usual. But if you didn’t set up materials correctly…
Preventing carbon monoxide poisoning
Carbon monoxide is a colorless, tasteless and odorless gas. Carbon monoxide poisoning usually happens more often during the winter months…
