The dam and reservoir are the source for the Hetch Hetchy Aqueduct, which provides water for over .
I havent spent much time looking at it but that data is on the CDEC website. not passed until 1928 five years after the dam was built. Hetch Hetchy Level before the storm: 3,729.68 feet Level after the storm: 3,750.99 feet Total rise: 21.31 feet Storage before the storm: 221,500 acre-feet Storage after the storm: 257,800. How come the totals disagree with the cal map graphic? Yoohyun Jung is the Deputy Data Editor for The San Francisco Chronicle. From the main road, it's about a 20- to 25-minute drive to the parking area. O'Shaughnessy Dam is a 430-foot (131 m) high concrete arch-gravity dam in Tuolumne County, California, United States.It impounds the Tuolumne River, forming the Hetch Hetchy Reservoir at the lower end of Hetch Hetchy Valley in Yosemite National Park, about 160 miles (260 km) east of San Francisco. I know this might be difficult to display but Im very curious on the actual amounts of water consumed on a monthly basis and if this is somehow processed in a certain between what is agricultural and what is non-commercial etc? This other page: Hetch Hetchy is one of nine reserviors in a water system that serves San Francisco and other Bay Area communities. LK ELEANOR NR HETCH HETCHY CA. Northern California's reservoir levels continued to rise in the week after an atmospheric river slammed the state with torrential rain and high winds. 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. This is the first state (of 6 I have lived in) that has had water police and restrictions. Saved to my favorites now. You can also use it to monitor only the reservoirs you are most interested in. BAWSCA Board of Directors Meeting, March 16, 2023, 6:30 PM. generates electricity for the city). The main goal of this visualization is to provide a quick overview of the status of the main reservoirs in the state and how they compare to historical levels. Thanks for putting this together. What period does CA use for Historical Average? It will be very different depending on the period chosen. 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. How do I pay my bill? Sacramento CA 95833, Everything about California water that matters, Western States Water Agencies and Districts. You can email her at agraff@sfgate.com. Last week, I paid a visit to Hetch Hetchy. Water data back to 1930 are available online. 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. Take CA Highway 120 from the park toward Groveland. 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). Restore Hetch Hetchy supports a power replacement plan that is truly renewable, and will not increase emissions of any pollutants or carbon that causes global warming. Current as of October 03, 2022 | Updated by . Exclusive: Stunning photos show Yosemite National Park under 15 feet of Warriors treating Andrew Wiggins with understandable patience, but his California snowpack hits highest level this century for March, could Map shows which parts of California exceeded entire years worth of rain, Map shows stunning improvement in California drought, Last chance to see: Bay Bridge lights turn off on Sunday. Love easy to read and understand information. 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. The SFPUC has voiced concerns with the Plan, as it would dramatically reduce the agencys water supply, leaving it subject to significant rationing in droughts and more extreme weather conditions brought on by climate change. drained by the Tuolumne So included in DWR #S. since it required flooding a Partly because of low water, the rivers chinook salmon runs have plummeted from tens of thousands of fish annually a few decades ago to fewer than 1,000 in recent years. 1 kaf is the amount of water that would cover 1 acre in one thousand feet of water (or 1000 acres in water in 1 foot of water). The amount stored is increasing, just not by a lot. San Francisco's water-bank in Don Pedro Reservoir, downstream on the Tuolumne River, holds twice as much water as Hetch Hetchy. During late summer and early fall, it will be necessary to move stored supplies from Cherry or Don Pedro Reservoirs into the pipeline. The water system, which includes the landmark Hetch Hetchy Reservoir, is expected to fill this winter, for the first time since 2019, with nearly 1.5 million acre-feet of water. For perspective, water demand across the SFPUCs service area of 2.7 million people was about 205,000 acre-feet last fiscal year. reserved. For some strange unknown reason, they are not allowing the lake to fill up. The information on Isabella has been fluctuating drastically (by a factor of 10!) Upcountry and the Bay Area. Read more about the data team and their work. "It is unknown how much area of the Feather River and Shasta Lake drainages are impacted by hydrophobic soils.". This is an excellent tool you have put together. Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. proposition that would have funded an $8 million study on how Water data back to 1956 are available online. The name Hetch Hetchy is derived from a Sierra Miwok ) or https:// means youve safely connected to the .gov website. She is a University of Washington graduate. The Department of Water Resources, which manages the state's water supply, said in a statement that there are several possible reasons for the difference in inflow amounts between the two reservoirs. The Bay Area portion of the System includes water collection, treatment, and transmission facilities from the Alameda East Portal to the wholesale service area and terminal reservoirs in San Francisco. Very nice work. Fish and Wildlife Service that provides an immediate $4 million investment for habitat improvements for fisheries in the Tuolumne River. The question was, what constitutes unreasonable method of Water is such a fascinating topic and Id hate to have to be a water manager making a decision on how much to release to avoid reservoir flooding. California Reservoir Levels - Dashboard and visualization showing current water levels in California reservoirs . It has no natural inflow or out flow. UPDATE: Here's where California reservoir levels stand after this week's rains. Our flagship blog features analysis of news from our staff and announcements of upcoming events. Could you also show each reservoirs level as a function of time? the issue, including those under Franklin Delano Roosevelt, I love this this site too. I think the problem is with the CDEC database (as the LakesOnline website also has had incorrectly high information). What rates am I paying? 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. The captured water is piped 150 miles to the Bay Area. Should be fixed at some point. During most years, there will be a 30-day shut down of the Hetch Hetchy source in the winter months. lawsuit, saying Restore Hetch Hetchys arguments were preempted Thanks for taking the time to do that. Due to its high-altitude location at 3,900 feet above sea level Amy Graff is the news editor for SFGATE. Forty-six percent . Your email address will not be published. . Why is it not listed? Stay up-to-date with breaking news and upcoming events. The windfall of water is welcome news for households and businesses in San Francisco, which use less water on average compared to the rest of the state but nonetheless have faced calls to cut back since 2021 because of water shortages. A lock ( An improvement: Could you include a bar for Last year at this date? Some want the city to leave more water in stream channels for threatened salmon while others continue a longshot bid to shut down Hetch Hetchy Reservoir in Yosemite altogether and return the area to its natural state. The recent spate of storms lifted the statewide snowpack to 190% of average for the start of the month, and more snow is on the way. 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. But they'll cost you, Fight at high school basketball game in S.F. Hi Keith, you could de-select the large reservoirs from the menu at the top right. It would be really interesting to visualize whether were able to replenish ground water this year after all the precipitation. Lake Mendocino, which has a capacity of 122,400 acre feet, saw the biggest boost from 17% of storage capacity in December to 35% in January. Thanks. Its important to note that other communities in California have taken actions in far greater magnitude than SF to make our waterways more sustainable. This was helpful to project seasonal trends & storm impacts. That said, most of its outflow makes its way down Feather River (via Rock Creek Reservoir) and ultimately into Orville. Exclusive: Stunning photos show Yosemite National Park under 15 feet of Warriors treating Andrew Wiggins with understandable patience, but his California snowpack hits highest level this century for March, could Map shows which parts of California exceeded entire years worth of rain, Map shows stunning improvement in California drought, Last chance to see: Bay Bridge lights turn off on Sunday. 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. Kurtis Alexander is an enterprise reporter for The San Francisco Chronicle, with a focus on natural resources and the environment. Thats a great suggestion and one that would be particularly helpful! 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. While the rainfall has been bad for many people, I am happy to see Californias reservoirs are benefiting slightly, Amen! May 24, 2022 - BAWSCA Statement About the Adoption of a Systemwide Water Use Reduction of 11%. In 2007, the Bush What happened to the Hetch Hetchy level? Flood control agencies (not DWR) have the most say in regard to releases. 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. In addition, San Francisco receives approximately one-tenth of its power from hydroelectricity generated by the gravity-driven flow from the Hetch Hetchy Reservoir. Then it has the appearance of something filling up, while still providing all the detail. California snowpack hits highest level this century for March. It seems likely one of those two readings is wrong. They also built a spillway that was too steep and did not install energy dissipators along the spillway. River. This dashboard is great! The regional water system provides water to 2.4 million people in San Francisco, Santa Clara, Alameda and San Mateo counties. But tearing down O'Shaughnessy Dam in order to restore Hetch Hetchy Valley would be a disaster. Check out my **new combined California reservoir and snowpack visualizer** to compare to historical values, as well asthe California precipitation tracker and California snowpack visualizer. It was at 60 percent as of March 1 and rising, according to the Bureau of Reclamation. During the winter months, they let water out of the reservoirs in anticipation of large storms. Emissions must be offset by dedicated conservation programs or renewable energy generation such as wind or solar. Thats just another very strong indication visually that its a big water year.. Great stuff. Lock Before returning to the Bay Area, she held roles as transportation reporter and trending news reporter at the IndyStar in Indianapolis. Thats up more than 400,000 acre-feet since early December, before the unrelenting series of atmospheric river storms blew through California between Christmas and mid-January. Data and Tools https://waterdata.usgs.gov/monitoring-location/11275500/#parameterCode=00054&period=P7D. maybe label the vertical axis with aggregate total or system total capacity. Our reservoirs were alarmingly low. 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. Its just small enough that the name doesnt appear as the bar is too thin. 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. 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. There doesnt seem to be any site that shows the impact of each storm. The blue line indicates the reservoirs water level one year ago today.
Different presidential administrations also have tried to address Its not possible to see or really interact with the tiniest slivers. 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. But I would never have imagined how to put all the important information into a single plot. Compared to the historical snowpack for this time of year, the May 2021 survey shows that we are only 2 to 5 percent of normal. A .gov website belongs to an official government organization in the She was previously an engagement reporter. Diamond Valley Lake is a man-made storage reservoir for storing imported water only. document.getElementById('globes').contentWindow.location.reload();
Californias largest water agencies, in both the urban and agricultural sectors, have invested in ambitious groundwater banking programs inKern County. }, false); Lake Tahoe really isnt part of California water, as the outflow goes to Nevada. By a large measure, damming and flooding Hetch Hetchy is the most significant damage ever allowed in any of our national parks. Department of Water Resources is just another in a long line of completely mismanaged California entities. Email: kalexander@sfchronicle.com Twitter: @kurtisalexander. Ive been meaning to search for aquifer levels. An official website of the United States government. Hetchy Reservoir can store as much as 117 billion gallons for the In 2016, a Tuolumne County Superior Court judge dismissed the I appreciate the information you are providing. Most local reservoir inflow timeseries are too short to calculate long-term values. I recently joined the team with Restore Hetch Hetchy as Engagement & Development Director. reservoir violates the California Constitution specifically the DWR is one of many local, State and Federal entities that dictate water releases. Hetch Hetchy has generated controversy since it was first use must be reasonable.. Our drinking water comes from a variety of protected sources carefully managed by the SFPUC. Hetch Hetchy is the only reservoir above its average storage of 63%, and is 82% full. Together, the BAWSCA agencies account for two-thirds of water consumption from the system and pay for two-thirds of its upkeep. This is a marimekko (or mekko) graph which may take some time to understand if you arent used to seeing them. If you are experiencing a water, power, or sewer emergency or service problem call our 24-hour hotline at 3-1-1 or (415) 701-2311 from outside SF or log on at, Public Notices and Public Meeting Notices, Customer Assistance Program - Water/Wastewater, Customer Assistance Program - Hetch Hetchy Power, Hetch Hetchy Power Medical Necessity Assitance Program, Hot Water Recirculation Pump Rebate Program, San Francisco's Urban Watersheds Overview, Free Phone Consultations, Evaluations and Devices, Games Puzzles Virtual Backgrounds Overview, Get your Free 2023 Pollution Prevention Calendar, Construction & Contracts Overview Overview, Contract Opportunities and Payments Overview, Project Review and Land Use - Hetch Hetchy Water and Power, Project Review and Land Use - San Francisco, Sewer System Improvement Program Overview, Water Infrastructure Improvements Overview, Boards, Commissions and Committees Overview, Internships, Apprenticeships and Youth Employment, Public Notices and Public Meeting Notices Overview, Audited Financial Statements & Annual Comprehensive Financial Reports, SFPUC Preliminary Public Power Options Report, Civic Center Sustainable Utilities District Plan, Resolution Condemning Systemic Racism & Taking Action to Promote Racial Justice. This is a very clear graph and I cannot imagine the hours you have put in while setting it up and doing the maintenance. If you look at the inflow data on the major reservoirs, its pretty flat. Draining Hetch Hetchy without depriving Bay Area residents of I do not see Diamond Valley Lake Resevoir on this page. You can find the charts below from the California Department of Water Resources website. 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. Impounded by O'Shaughnessy 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. A small portion of the citys water comes from local reservoirs. HETCH HETCHY RES A HETCH HETCHY CA. Wonderful site. globe = document.getElementById('mekko');
Maybe bad data. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. Delivery rates are 7-day average values. 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. Its promising, but too early to let our guard down, said Joseph Sweiss, spokesman for the San Francisco Public Utilities Commission, the citys water purveyor, in an email to The Chronicle. It used to be full (and beyond). One gauge in the area has measured 6.12 inches since Oct. 1, which is 899% of normal. Data have been checked by the reporting agency. This local water is captured in reservoirs located in San Mateo and Alameda counties. Thank you for a beautiful job. Instructions: The trail takes you to the base of Wapama Falls, passing two smaller waterfalls (during spring) on the way.
Lake Oroville. The SFPUC has also raised concerns over the fishery benefits of the States Plan. For most of the year it will still be possible to divert the flow of the Tuolumne River into the pipeline just downstream of the National Park boundary. Absolutely zero reason to be releasing this much water from these reservoirs. Remaining Capacity text in the legend should be brown? It used to be full (and beyond). draining the reservoir to court, arguing in 2015 that the located in a national park and it passed the Raker Act in 1913 to Charts from the California Department of Water Resources show conditions at key state reservoirs on Oct. 22 (left) and on Nov. 2 (right). With how we can now basically pinpoint future precipitation amounts at least a month in advance, no reason to not let these reservoirs fill up past historic averages for this date. Ive looked at reservoir sights for years. Jeff, the average changes daily as well. https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=HTH https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=SHA The overall storage is said to have dropped by 57.4 to 56.4 (or 302 kaf). San Francisco operates three medium-sized hydro-electric power plants in the Tuolumne River watershed Kirkwood, Moccasin, and Holm. So many facets beautifully chartered. The SFPUC gets the bulk of its water from a network of reservoirs in the central Sierra Nevada that have long altered flows of the Tuolumne River and its tributaries. Why is Lake Nacimiento and Lake San Antonio not listed? After the reservoirs Water storage facilities include watersheds, dams, and reservoirs including: Calaveras, San Antonio, Crystal Springs, Pilarcitos, and San Andreas. thanks. Great URL. 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. Theyve also seen drought surcharges on their water bills. their water supply would cost hundreds of millions of dollars at This file photo shows Shasta Lake. Voters rejected a 2012 Your tools are awesome just hurts when you receive bad data at times! environmental context. Greetings from Mount Laurel New Jersey. 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. A wet December produced ample snowfall, which is still sitting at high elevations. It wont be full until Spring snowmelt. This is a great and very thoughtfully designed web site! But it has flooded nine miles of a glacier-carved valley and blocks access to the Grand Canyon of the Tuolumne and other nearby areas. Official websites use .gov This is my first year watching the levels, so maybe Im missing something. She has been with SFGATE for more than 10 years. finding an alternative water and power source (Hetchy Hetchy also The worst possible scenario is it just remains completely dry. Tracy Barbutes, Freelance / Special to The Chronicle, Heres where California reservoir levels stand after this weeks rains. Even with the latest precipitation, Folsoms values was unchanged. Whats going on with the water level at Oroville? Really appreciate the work you did to build this graph. Didnt realize how bad things were there. So while that is kind of good news, he said, things start to look more grim after January produced paltry rainfall and, so far, February has also been dry. }
Begin at O'Shaughnessy Dam. The adopted Plan addresses water quality issues affecting the ecosystem and fisheries of the Bay-Delta system. The main reason for the discrepancy, the department said, is that the focus of the atmospheric river was generally between the Golden Gate and Mount Lassen, meaning that the Feather River watershed received much more rainfall than the Shasta Lake drainage area. All of this work is nothing short of brilliant. San Francisco maintained the phrase only 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%. Next feature request: wire in aquifer level data! Nice!
Similar to the water supply issues discussed above, the amount of power replacement is small in a statewide context less than of 1% of the renewable power supply being developed this decade alone. If you are on a computer, you can hover your cursor over a reservoir and the dashboard at the top will provide information about that individual reservoir. Isabella is filling quite slowly in order to test out the new $500 million spillway. Navigation and Navigable Waters 33.208.82 Hetch Hetchy, Cherry Valley, and Don Pedro Dams and Reservoirs. Love this. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. Awesome work!! Great resource! function resizeframe(){
There are many very small reservoirs (relative to Shasta) so the bars will be very thin to the point where they are barely a sliver or may not even show up. Thanks for providing it for public information. The half-hour drive to Hetch Hetchy from CA Highway 120 begins outside the park boundaries. Occasionally the source water will shift to local reservoirs during routine maintenance to the conveyance system. 2022 All Rights Reserved. James Q. Martin / Restore Hetch Hetchy Show More Show Less 4 of 7 While the long-term voluntary agreement work continues, the SFPUC does not want to wait to restore the Tuolumne Rivers ecosystem. California boosts water deliveries to highest level in years, thanks to storms, California reservoir levels: Charts show water supply across the state, Track water shortages and restrictions across Bay Area. This almost happened with the Orville Dam in 2017. I would turn this graph, 90 counterclockwise, and start the capacity along the bottom axis from left to right, with the biggest reservoirs on the left and the smaller ones on the right. In Yosemite National Park, the Hetch Hetchy reservoir relies. This is the best one out there. The Hetch Hetchy Reservoir in Yosemite National Park can store up to 117 billion gallons of drinking water that is used for the Hetch Hetchy Regional Water System that provides water for 2.6 . Trailhead address: Evergreen Road (Hetch Hetchy Road), Yosemite National Park, CA 95321. Copyright Barry Rokeach, 2014. Wife of missing Bay Area radio host says Jeffrey Vandergrift will not Sen. Dianne Feinstein is hospitalized in San Francisco with shingles, California extends deadline to file 2022 income taxes to match IRS decision, Going to Tahoe this weekend? San Franciscos Hetch Hetchy water system is almost full for the first time in years. The OShaughnessy Dam i s 300 feet tall only medium-sized by todays standards. Yep. Before joining the Chronicle, Alexander worked as a freelance writer and as a staff reporter for several media organizations, including The Fresno Bee and Bay Area News Group, writing about government, politics and the environment. provides water to 2.7 million residents and businesses in the San The valley is At the beginning of this water year, which started on October 1, 2022, the state's largest water reservoir, Lake Shasta, was a third full, at 33 percent.
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