Voters rejected a 2012 currently, there is a lot more water coming in than going out. The water treatment facilities are Tesla Ultraviolet Treatment Facility, disinfecting the Hetch Hetchy supply; Sunol Valley Water Treatment Plant, treating the water from the Calaveras and San Antonio supply as well as the stored Hetch Hetchy supply; and Harry Tracy Water Treatment Plant, treating the water from the Crystal Springs and San Andreas supply. Curious why Shasta lake seems to be making big gains in water coming in and Trinity not so much? Water data back to 1956 are available online. Central Valleyfarms have installed enough drip irrigationstrips to reach the moon and back, an improvement that also enables more efficient application of fertilizer and pesticides. If you look at this chart for Hetch Hetchy, you can see that the biggest and steadiest rise is between March and July, https://waterdata.usgs.gov/monitoring-location/11275500/#parameterCode=00054&period=P365D&compare=true. Commission. hetch hetchy reservoir level percentage Rivers and Streams Streams draining into the Peninsula Watershed within the project area are relatively small, steep, and in a 2021-11-17. Its water supply Hetch Hetchy Reservoir, in the Sierra Nevada is 80% full, the ground is saturated and near-record rainfall has occurred in recent days. You can also share a custom URL by clicking the Save URL button which will put the custom URL into the URL bar of your browser which you can then copy and share. The Mokolumne River, which originates in the high Sierra, provides more than 90 percent of the East Bay's water and the Owens Valley in the eastern Sierra serves as a key source of water for Los Angeles. At this facility, which is shared with other water agencies, the city can stash water for credits against future draws on the river. Just in case a large storm hits, that way they dont reach 100% capacity. This is a very clear graph and I cannot imagine the hours you have put in while setting it up and doing the maintenance. I like the comparisons of last year, and the historical average. This is wonderful information. The reservoir is eight miles long and the largest single body of water in Yosemite. Near the town of La Grange, the river exits the Sierra Nevada foothills and flows through a gently sloping alluvial valley that is incised into Pleistocene alluvial fans. Your tools are awesome just hurts when you receive bad data at times! An official website of the United States government. Thats a very poor design. Most local reservoir inflow timeseries are too short to calculate long-term values. The Hetch Hetchy reservoir, which supplies water for San Francisco and other parts of the Bay Area, was at 77% of its 360,000-acre-feet storage capacity in January compared to 73% in December, and on Feb. 7, it was up to 82%. This is a marimekko (or mekko) graph which may take some time to understand if you arent used to seeing them. Additionally, the bounty helps the more than two dozen communities in Alameda, San Mateo and Santa Clara counties that get their water from the city. These graphs will always read low because they represent the percentage of the seasonal average at some point before the end of the season. finding an alternative water and power source (Hetchy Hetchy also If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. The snowpack acts as a natural reservoir and slowly releases water.. Delivering approximately 260 million gallons of water per day, the regional system consists of over 280 miles of pipelines, over 60 miles of tunnels, 11 reservoirs, five pump stations and two water treatment plants. Lake Shasta, the state's largest reservoir, rose 2.9 feet and added 31,020 acre-feet of water. not passed until 1928 five years after the dam was built. FYI it looks like Isabella is reading incorrectly, likely because its well above 100%. Forty-six percent . Didnt realize how bad things were there. Especially for small ones it is hard to identify them and click on them. Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. Before returning to the Bay Area, she held roles as transportation reporter and trending news reporter at the IndyStar in Indianapolis. It was the only tool that I could find that would allow me to make a vertical marimekko graph. . Construction of the regional water system proceeded over the following 20 years, with water first delivered in 1934. I see many of the local canals flowing with lots of water. reserved. It is also the amount of water in a cube that is 352 feet per side (about the length of a football field). Santa Clara, Alameda and San Mateo counties. The surplus has renewed concerns about San Francisco stockpiling water at the expense of rivers and the fish and wildlife that live there. It certainly looks dry at least until the last week in February, he said. Updated to include drought zones while tracking water shortage status of your area, plus reservoir levels and a list of restrictions for the Bay Areas largest water districts. Rizzardo said there was a decent amount of flow into the reservoirs into January, even though weather-wise it was bone dry, a result of lower elevation snow at 4,000 to 6,000 feet making its way into the reservoirs. rejected by an appellate court and the California Supreme Court Lock Hetch Hetchy is one of nine reserviors in a water system that serves San Francisco and other Bay Area communities. Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA.
Our drinking water comes from a variety of protected sources carefully managed by the SFPUC. At times, nearly 90% of the flow of the Tuolumne River is piped off by the SFPUC and other water agencies in the region. This website along with another shows that Eastmans level is still rising even though we have not had rain in more than a week. At the height of the recent drought, they still had at least four years in storage. And for the years they were hoarding water, the salmon-based ecosystem suffered.. Together, the BAWSCA agencies account for two-thirds of water consumption from the system and pay for two-thirds of its upkeep. San Franciscos water-bank in Don Pedro Reservoir, downstream on the Tuolumne River, holds twice as much water as Hetch Hetchy. How do I contact support? Its supposed to be brown. Great Job on this site! They have restoredMono Lake,improved stream flows on the North Coast and in theCentral Valleyand diminished the threat to native fish in the Bay Delta. Are they releasing water to relieve the pressure in anticipation of more water? their water supply would cost hundreds of millions of dollars at Thanks. DWR is one of many local, State and Federal entities that dictate water releases. Call 209-372-0200 for the latest road and weather conditions, Hetch Hetchy Road Daily Hours: 8 am to 5 pm Super frustrating. Begin at O'Shaughnessy Dam. How do I pay my bill? Click here for the SFPUC's 2020State of the Regional Water System Report. Thanks for taking the time to do that. But they'll cost you, Fight at high school basketball game in S.F. This is also affected by most of these dams multi-purpose nature where they are near constantly releasing for power(like Shasta) or to make room for flood control capacity(like Folsom). Impounded by OShaughnessy Dam, Hetch Hetchy Reservoir water passes through hydroelectric powerhouses before it enters the San Joaquin Pipelines, the Tesla Ultraviolet Treatment Facility, and the Coast Range Tunnel on its journey to the Bay Area.
The information on Isabella has been fluctuating drastically (by a factor of 10!) Trinity Lake, with a capacity of 2,447,650 acre-feet, had the smallest increase, from 29% in December to 30% in January. At the same time, theyve also said its critical to maintain sufficient water supplies to keep Bay Area communities and its economy running during a prolonged drought. It seems likely one of those two readings is wrong. During most years, there will be a 30-day shut down of the Hetch Hetchy source in the winter months. "It's an increase of a few percent, . This is an excellent tool you have put together. The cities of Burlingame, Hayward, Menlo Park, Palo Alto, Redwood City and San Mateo, along with the Alameda County Water District, were among Bay Area communities whose support was influential in persuading Congress to pass the controversial Act, and President Woodrow Wilson to sign it. The gain came after weather gauges in the area recorded more than 5 inches from one storm. Our reservoirs were alarmingly low.
You can also use it to monitor only the reservoirs you are most interested in. 501(c)3 organization, federal tax ID #942419885. Since June 2011, the Water Enterprise has operated the Citys Emergency Firefighting Water System (EFWS, formerly known as the Auxiliary Water Supply System (AWSS)), an independent, high-pressure water supply system for fire suppression. Previously, Kellie covered dining news and trends, visual arts, events and nightlife for the Arizona Republic, and freelanced for the former Contra Costa Times. Why is Lake Nacimiento and Lake San Antonio not listed? In Yosemite National Park, the Hetch Hetchy reservoir relies. According to the SFPUC, the upper reaches of the Tuolumne River have received about 36 inches of rain since the start of the water year in October, almost as much as what the area averages in a year. This was helpful to project seasonal trends & storm impacts. generates electricity for the city). Winter weather conditions may cause road closures. Share sensitive information only on official, secure websites. During the winter months, they let water out of the reservoirs in anticipation of large storms. The amount stored is increasing, just not by a lot. A small portion of the citys water comes from local reservoirs. This chart only shows reservoirs filled via natural flow/rainfall. O'Shaughnessy Dam was built on the Tuolumne River in 1923 to create Hetch Hetchy Reservoir. Great graphs and very useful. They placed a few dissipators just before the river. Hetchy refers to a valley in the Sierra Nevada and a reservoir that Northern California's reservoir levels continued to rise in the week after an atmospheric river slammed the state with torrential rain and high winds. HETCH HETCHY RES A HETCH HETCHY CA. The construction of the Hetch Hetchy Railroad took place from 1915 to 1918. a broad meaning that had been previously applied in an A dry January with little rainfall across much of Northern California actually didnt hurt the states water storage levels, according to data from the California Department of Water Resources. If you are reading this, its probably the winter rainy season in California again, and time to check on the status of the water in the California reservoirs. it will be cool if there is a way to track the change since Dec or some such date. Several cities and water agencies that are now part of BAWSCA urged Congress to pass the Raker Act in 1913, the law that allowed federal lands in the Sierra Nevada Mountains, including Hetch Hetchy Valley in Yosemite National Park, to be used to build the water system. It used to be full (and beyond). The SFPUC has consistently stated that voluntary agreements are the best path forward for the Bay-Delta, as the voluntary agreement strikes the right balance between environmental stewardship and water reliability. Amy Graff is the news editor for SFGATE. The area around Shasta has more volcanic soils that absorb rainfall than the Feather River drainage. SFGATE took a look at reservoir levels three days after the Oct. 24 storm and below we take another look, examining water level rises and storage increases at a broader range of reservoirs roughly a week after the atmospheric river event. The middle portion of the watershed from New Don Pedro Reservoir to above Hetch Hetchy Reservoir is characterized by deep canyons and forested terrain. Great stuff. https://waterdata.usgs.gov/monitoring-location/11275500/#parameterCode=00054&period=P7D. In response to the Bay-Delta Plan, the SFPUC and the Modesto and Turlock Irrigation Districts have proposed the Tuolumne River Voluntary Agreement, a combination of flow and non-flow measures sufficient to improve all life-stages of native fish populations in the lower Tuolumne River. As the system aged, especially in an era of heightened safety awareness following the Loma Prieta Earthquake in 1989 and drought in the 1990s, it became evident that the system required a complete overhaul. best to drain the valley. John Muir and the Trailhead address: Evergreen Road (Hetch Hetchy Road), Yosemite National Park, CA 95321. BAWSCA Board of Directors Meeting, March 16, 2023, 6:30 PM. Great visualization Chris! Restoring Hetch Hetchy will require some changes in how San Francisco moves and stores water. Take CA Highway 120 from the park toward Groveland. Data and Tools . Department of Water Resources is just another in a long line of completely mismanaged California entities. The San Francisco Public Utilities Commission is involved in on-going negotiations with the State on a voluntary agreement for implementation of the Bay-Delta Plan, which calls for large increases in water releases on the tributaries to the San Joaquin River, a major tributary to the Bay-Delta. Ronald Reagan and George W. Bush. Upcountry and the Bay Area. Thanks for putting this together. The Hetch Hetchy Valley today with the dam seen in the lower right. Current as of October 03, 2022 | Updated by . Its essential to understand that the dispute over San Franciscos use of Hetch Hetchy is not about the use of water only how it is stored. In fact, thanks to a little snowmelt, water levels were up for all reservoirs from December to January. The state's second-largest reservoir, Lake Oroville in Butte County, saw especially dramatic gains with a 30.4-foot rise in the water level and a 182,625-acre-foot increase in the total amount of water, data posted Tuesday from the California Department of Water Resources showed. They also built a spillway that was too steep and did not install energy dissipators along the spillway. In addition, San Francisco receives approximately one-tenth of its power from hydroelectricity generated by the gravity-driven flow from the Hetch Hetchy Reservoir. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. James Q. Martin / Restore Hetch Hetchy Show More Show Less 4 of 7 Units are in kaf, thousands of acre feet. These sources include surface water stored in reservoirs located in the Sierra Nevada, Alameda County and San Mateo County, and groundwater supplies stored in a deep aquifer located in San Francisco and San Mateo counties. For example, Hetch Hetchy Reservoir in Yosemite National Park provides 85 percent of San Francisco's total water needs. It wont be full until Spring snowmelt. In 2016, a Tuolumne County Superior Court judge dismissed the You can sort the mekko graph by size largest at the top to smallest at the bottom or by reservoir location, from north to south. draining the reservoir to court, arguing in 2015 that the It carried workers and materials for the dam, as well as tourists, postage and other amenities. function resizeframe(){
The OShaughnessy Dam i s 300 feet tall only medium-sized by todays standards. Add a button to convert the row heights to log scale. So on Jan 10 were at 82% of the average for Jan 10. GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System. Best of luck out there in California! I think the problem is with the CDEC database (as the LakesOnline website also has had incorrectly high information). We provide water directly to customers in San Francisco and wholesale through 26 Water agencies in Alameda, Santa Clara, and San Mateo counties. setTimeout(function (){
The only improvement I would ask you to consider is to allow the Y-axis to be Linear or Log, the latter allowing us to see all the small reservoirs quite easily. Over the summer, Gov. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. California reservoir levels: . San Francisco will be in great shape going into 2023, said Spreck Rosekrans, executive director of Restore Hetch Hetchy Its unfortunate that too little is being done with these flows to recharge groundwater basins to help cities and farms and even restoring Hetch Hetchy Valley., Kurtis Alexander is a San Francisco Chronicle staff writer. The SFPUC hoards water in dry years when they dont need to, said Peter Drekmeier, policy director at the conservation group Tuolumne River Trust. Major snowstorm might leave you stranded, New 101 express lanes opens in Bay Area. Just a wistful thought, it would be really cool to graph the water release statistics. The Hetch Hetchy reservoir, which supplies water for San Francisco and other parts of the Bay Area, was at 77% of its 360,000-acre-feet storage capacity in January compared to 73% in. Ive added it to my bookmarks for quick reference. It allowed the water over the spillway to move too fast creating a vacuum between the water and the concrete that pulled the concrete sections out of the spillway. Therefore flood control agencies take the more conservative route and order the release of water. I am new to the state. San Franciscos Hetch Hetchy water system is almost full for the first time in years. Excellent graphic! The dam and reservoir are the source for the Hetch Hetchy Aqueduct, which provides water for over . While the rainfall has been bad for many people, I am happy to see Californias reservoirs are benefiting slightly, Amen! I am grateful for all that you have done here to open our eyes to what is happening, what has happened, and even what might be on the horizon. I had a class in spillway design many years ago. Current and Historical Visualization, https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=HTH, https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=SHA, https://engaging-data.com/ca-reservoir-level/, https://cdec.water.ca.gov/reportapp/javareports?name=RES, Visualizing Californias Water Storage Reservoirs and Snowpack, Interactive California Reservoir Levels Dashboard. These sources are diverse in both the origin of the supply snowmelt, rainfall and recharge of groundwater and their location within our system.