O'Shaughnessy Dam was built on the Tuolumne River in 1923 to create Hetch Hetchy Reservoir. Each row represents one reservoir, with bars showing how much of the reservoir is filled (blue) and unfilled (brown). 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. Locked padlock around the Bay Area rely on the Hetch Hetchy Regional Water Different presidential administrations also have tried to address DWR is one of many local, State and Federal entities that dictate water releases. Located within the boundaries of Yosemite National Park, the reservoir saw a sizable 21.31-foot bump in its water level and gained 36,300 acre-feet, according to Tuesday data from the U.S. Geological Survey. Lake Oroville. Similar findings are described in theUC Davis studyRe-Assembling Hetch HetchyandUS Bureau of Reclamation study. Water data back to 1956 are available online. mobilewarn(); That said, most of its outflow makes its way down Feather River (via Rock Creek Reservoir) and ultimately into Orville. Yoohyun Jung is the Deputy Data Editor for The San Francisco Chronicle. The average for this time of year is approximately 4,659.57ft, plus or minus 39ft. I will take a look and see if there are other important reservoirs missing and may add them in the future. resizeframe(); use must be reasonable.. Turn right on to Hetch Hetchy Road - Evergreen Road and continue another 7.5 miles to the parking area for Hetchy Hetchy Reservoir next to the dam. Great resource! looks like the CDEC website is the cause of the issue unless it actually dropped 90% in a day: You can also use it to monitor only the reservoirs you are most interested in. proposition that would have funded an $8 million study on how In another sign that Californias drought is easing, San Francisco captured more than a years worth of water in just one months time. I also added the ability to select specific reservoirs to display on the graph and share a custom URL which will point those selected reservoirs (click on list button on top right of dashboard). generates electricity for the city). I dont know if weve seen anything like this in October before.". the Hetch Hetchy Valley to its natural state. Weve been at zero now for several weeks, and we really want to see that turn around., Kellie Hwang and Yoohyun Jung are San Francisco Chronicle staff writers. The reservoir is eight miles long and the largest single body of water in Yosemite. BAWSCA Board of Directors Meeting, March 16, 2023, 6:30 PM. P.S. She is also an alumna of Reveal from the Center for Investigative Reporting Investigative Fellowship and The New York Times Student Journalism Institute. CHERRY LK NR HETCH HETCHY CA Important Legacy real-time page Monitoring location 11277200 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. Maybe bad data. Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. The blue line indicates the reservoirs water level one year ago today. The area around Shasta has more volcanic soils that absorb rainfall than the Feather River drainage. Ive added it to my bookmarks for quick reference. San Franciscos water system, which includes Hetchy Hetchy, is expected to fill this winter for the first time since 2019. Delivery rates are 7-day average values. Gavin Newsom asked all California residents to voluntarily reduce use by 15% compared with use in 2019. Python is used to extract the data from this page hourly and wrangle the data in to a clean format. mandate within "It was a very healthy shot in the arm. If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. At times, nearly 90% of the flow of the Tuolumne River is piped off by the SFPUC and other water agencies in the region. Hetch Hetchy is only one of nine reservoirs in the San Francisco Public Utility Commission's water system. Other California water agencies have done far more to reduce the impact of their system on Mono Lake, the Trinity and San Joaquin Rivers, and the Bay-Delta. The reservoir is now projected to cost $4.4 billion, with Prop. This site is a great tool, especially as we try to climb out of these drought years. A diverse mix of sources protects us from potential disruptions due to emergencies or natural disasters, provides resiliency during periods of drought, and helps us ensure a long-term, sustainable water supply as we address issues such as climate uncertainty, regulatory changes and population growth. For the class we based all our designs on the USACE spillway design manual. 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. globe = document.getElementById('mekko'); A different story is unfolding at Hetch Hetchy reservoir in Yosemite National Park, where water is being released to conserve and restore wildlife. 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. 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. https://engaging-data.com/ca-reservoir-level/ It didnt end the drought, but it was definitely really good," said Ritchie. ", The difference in soil type in the two watersheds was likely another factor. In 2016, a Tuolumne County Superior Court judge dismissed the I second that request. a minimum, according to the San Francisco Public Utilities While constructed and owned by San Francisco, the water system was in fact planned to benefit the greater San Francisco Bay Area population. . Could the reason be that the water from Lake Alma or seems to be used for energy generation, and that there does not seem to be any agricultural or urban use? Reservoir levels rising. One of the big challenges in water management is controling the release. The proportion of blue to brown will show how full it is, while the red line shows the historical level that reservoir is typically at for this date of the water year. The SFPUC hoards water in dry years when they dont need to, said Peter Drekmeier, policy director at the conservation group Tuolumne River Trust. } At the moment, I am not interested in the debate. reservoir violates the California Constitution specifically the Sierra Club unsuccessfully fought the reservoirs establishment The cities, water districts and private utilities represented by the Bay Area Water Supply and Conservation Agency (BAWSCA) rely upon the Hetch Hetchy system for water to protect the health, safety and economic well being of 1.8 million citizens, businesses and community organizations. 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. The amount stored is increasing, just not by a lot. 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. Born in Seoul, Yoohyun began her career in Arizona, where she worked for two of the state's largest newspapers covering various beats, including criminal justice and education. Crystal Springs Reservoir, along Highway 280 in San Mateo County, was 89 percent . One gauge in the area has measured 6.12 inches since Oct. 1, which is 899% of normal. Our drinking water comes from a variety of protected sources carefully managed by the SFPUC. It looks like the red and blue lines are backwards on Folsom. 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. Hetch Hetchy is the only reservoir above its average storage of 63%, and is 82% full. In whats known as the Bay-Delta Plan, state water regulators are amid a years-long effort to negotiate a policy for how much water should be kept in rivers that flow to the Sacramento-San Joaquin River Delta to meet the needs of both people and wildlife. window.addEventListener("orientationchange", function() { **new combined California reservoir and snowpack visualizer**, made a bar graph showing the overall level of water in the major California reservoirs, the California Department of Water Resources (DWR) Data Exchange Center. A .gov website belongs to an official government organization in the At this facility, which is shared with other water agencies, the city can stash water for credits against future draws on the river. For the first week of February, there was a slight increase for most reservoirs from January amounts. Yes, and why is Twitchell Dam also not listed? Thank you for the time and effort in creating the graphs. YTD values are from January 1 . San Francisco and the thousands of suburban . Should be fixed at some point. . 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. Usually with warm ARs, you get a dramatic increase in inflow, which can fill even very large reservoirs relatively quickly, like Oroville in 2017. Shasta is very large and could hold about 3.5 cubic kilometers of water at full (but not flood) capacity. Email: kalexander@sfchronicle.com Twitter: @kurtisalexander. In 2021, the SFPUC and the Modesto and Turlock Irrigation Districts launched a proactive pilot program with the U.S. They are releasing water into the canals. 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. More about the Tuolumne River Voluntary Agreement can be found athttp://www.tuolumnerivermanagementplan.com. Having it here would be great! From the main road, it's about a 20- to 25-minute drive to the parking area. Winter weather conditions may cause road closures. Much of the recent inflow was to Hetch Hetchy, which can hold about 360,000 acre-feet of water and was 83% full at the start of the month. This chart only shows reservoirs filled via natural flow/rainfall. construction in the 1920s, various groups have lobbied to restore John Muir and the Good info to know. This is a very clear graph and I cannot imagine the hours you have put in while setting it up and doing the maintenance. November 10, 2022 - BAWSCA Statement on State Water-Policy Officials, SFPUC, and Districts Sign MOU for Tuolumne River to Help Recover Salmon While Protecting Water Reliability. Meanwhile, the group Restore Hetch Hetchy is urging the SFPUC to abandon Hetch Hetchy Reservoir. Secure .gov websites use HTTPS I find myself coming back to this every few days to check on our water . That includes the Tuolumne River, which provides water via Hetch Hetchy Reservoir to Bay Area customers. And early forecasts show the rest of the wet season is not likely to produce enough precipitation. 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. The OShaughnessy Dam, which was completed in 1938 and is 430-feet tall, impounds water in Hetch Hetchy Reservoir for communities in the Bay Area. 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. Great graphs and very useful. This is a great and very thoughtfully designed web site! A truly excellent project. Lock FYI it looks like Isabella is reading incorrectly, likely because its well above 100%. But tearing down O'Shaughnessy Dam in order to restore Hetch Hetchy Valley would be a disaster. "It's an increase of a few percent, . Hetch Hetchy is one of nine reserviors in a water system that serves San Francisco and other Bay Area communities. The dam and reservoir are the source for the Hetch Hetchy Aqueduct, which provides water for over . Hetch Hetchy Reservoir in Yosemite was 69 percent full on Tuesday, 150 percent of normal for this time of year. Local reservoir inflows have negative daily flow rates set to zero. Californias largest water agencies, in both the urban and agricultural sectors, have invested in ambitious groundwater banking programs inKern County. LK ELEANOR NR HETCH HETCHY CA. Thanks for taking the time to do that. She was born and raised in the Bay Area and got her start in news at the Daily Californian newspaper at UC Berkeley where she majored in English literature. 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. Im curious why the percentage of capacity has stayed almost flat for the past 6 weeks or so and below historical average. 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. word for a type of wild grass. Commission. Most local reservoir inflow timeseries are too short to calculate long-term values. Is the Stanley Quencher tumbler worth its TikTok hype? Next feature request: wire in aquifer level data! Thats just another very strong indication visually that its a big water year.. I notice Briones Reservoir is not on the list. Trailhead coordinates: 37.946905, -119.787376 (37 56 48.85N 119 47 14.55W) it will be cool if there is a way to track the change since Dec or some such date. Californias snowpack slips below average after dismally dry January, renewing concerns about drought, Busting water limits wont cost you in Marin County: Penalties canceled as rain fills reservoirs, California snowpack hits highest level this century for March. BAWSCA agencies advocated for the capital improvement program that was adopted by the SFPUC in 2002, and are actively monitoring its implementation. Upcountry and the Bay Area. The valley is Greetings from Mount Laurel New Jersey. Generation at the Kirkwood power plant would depend on the natural flow of the Tuolumne River, and would be significantly diminished during late summer and fall. San Franciscos Hetch Hetchy water system is almost full for the first time in years. 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. Folsom is like an overflow tank. Water storage facilities include watersheds, dams, and reservoirs including: Calaveras, San Antonio, Crystal Springs, Pilarcitos, and San Andreas. Draining Hetch Hetchy without depriving Bay Area residents of 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 . This is wonderful information. . 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. Love the dashboard! What happened to the Hetch Hetchy level? However, I am interested in how much we are saving. 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? 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. 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. Curt, Good point re the colder weather dropping more snow instead of rain at higher elevations this year. Ronald Reagan and George W. Bush. setTimeout(function (){ and maybe another vertical axis to the right of that with reservoir capacity. 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. The water travels through a series of pipelines before it reaches the Bay Area and blends with five local reservoirs. Find out more about the system at http://www.sfwater.org, BAWSCA Board Policy Committee Meeting, April 12, 2023 1:30pm. In Yosemite National Park, the Hetch Hetchy reservoir relies. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. Its not possible to see or really interact with the tiniest slivers. Water data back to 1956 are available online. over the past few days. proposed as a source of water following the 1906 San Francisco Nice! In 2007, the Bush This website along with another shows that Eastmans level is still rising even though we have not had rain in more than a week. Restore Hetch Hetchy. Thanks for developing it, and for sharing it with the rest of us! 2022 All Rights Reserved. San Francisco maintained the phrase only The captured water is piped 150 miles to the Bay Area. Kellie has held many leadership roles for the Asian American Journalists Association, including most recently a board member for the San Francisco chapter. "Some weather monitoring stations in the Feather River drainage received as much as 12 to 19 inches during the period of the storms," the department said. I have wanted to do exactly this plot for years. The question was, what constitutes unreasonable method of reserved. earthquake. Hetch Hetchy water travels 160 miles via gravity from Yosemite to the San Francisco Bay Area. The tremendous inflow to city reservoirs during the recent storms, mostly in and around Yosemite National Park, has lifted San Franciscos total water storage to near capacity. Thats a very poor design. It would be really interesting to visualize whether were able to replenish ground water this year after all the precipitation. Ive been meaning to search for aquifer levels. Quite an eye opener. 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. Why is Lake Nacimiento and Lake San Antonio not listed? 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. James Q. Martin / Restore Hetch Hetchy Show More Show Less 4 of 7 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. I dont think its currently above the historical average, not below 1 year ago. 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. Thats a great suggestion and one that would be particularly helpful! Spring snowmelt runs down the Tuolumne River and fills Hetch Hetchy, the largest reservoir in our water system. During most years, there will be a 30-day shut down of the Hetch Hetchy source in the winter months. 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. It was my first time using D3 and it took me a long time to get up to speed. Sometimes this is well done sometimes it is poorly done. Remember, much of the state is still in a drought and so the prudence is warranted.. Great URL. Theyve also seen drought surcharges on their water bills. Article X, Section 2 that requires diversions for all water Have you looked into that side of the water management equation? pertained to water that was wasted, and there was no claim that finding an alternative water and power source (Hetchy Hetchy also The data on water storage comes from the California Department of Water Resources (DWR) Data Exchange Center. It wont be full until Spring snowmelt. It takes a fair amount of work to make graphs compared to other more plug-and-play libraries but its very customizable, which is a plus. System for more than 60 percent of their drinking water. It has no natural inflow or out flow. The current power produced by the SFPUC system, although not carbon-based, is not green since it requires the continued destruction of significant habitat. If you are on a mobile device you can tap the reservoir to get that same info. I have to agree with many people here what a great job making such a clear graph of whats happening. Current as of October 03, 2022 | Updated by . River. Prior to The Chronicle, she worked as a data journalist for Honolulu Civil Beat, a watchdog news organization covering the Hawaiian islands. David Rizzardo, hydrology section manager for the California Department of Water Resources, said there are a lot of factors that affect reservoir storage. 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. Saved to my favorites now. Share sensitive information only on official, secure websites. One of the most impressive was Hetch Hetchy, which provides drinking water to 2.6 million people in San Francisco and other Bay Area communities. This system encompasses more than 1,250 miles of distribution pipelines, as well as 12 in-City reservoirs and eight water tanks with a total storage capacity of approximately 413 million gallons. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. Its water supply Hetch Hetchy Reservoir, in the Sierra Nevada is 80% full, . In fact, thanks to a little snowmelt, water levels were up for all reservoirs from December to January. 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. 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. Trailhead address: Evergreen Road (Hetch Hetchy Road), Yosemite National Park, CA 95321. Hetch Hetchy water travels 160 miles via gravity from Yosemite to the San Francisco Bay Area. Instructions: Whats going on with the water level at Oroville? His recent work has examined the impacts of drought, threats to public lands and wildlife, and the nation's widening rural-urban divide. What happened to the Hetch Hetchy level? provides water to 2.7 million residents and businesses in the San 9 of 12 10 of 12 Hetch Hetchy Reservoir with Wapama Falls near Groveland, Calif. on Wednesday March 12, 2014, is currently at fifty percent of capacity. Department of Water Resources is just another in a long line of completely mismanaged California entities. 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. Also, do they provide inflows and outflows for locations? Reservoir Report 4,670 ft -0.02% today 100% of normal Normal Water lake or reservoir water surface elevation above ngvd 1929, ft at Cherry Lk Nr Hetch Hetchy Ca is currently 4,670 ft, approximately 100% of normal. It certainly looks dry at least until the last week in February, he said. I would think with the rain it would get to historical average and then more outflow would happen. not passed until 1928 five years after the dam was built. Jeff, the average changes daily as well. Super frustrating. Official websites use .gov }, false); Lake Tahoe really isnt part of California water, as the outflow goes to Nevada. My guess would be that the recent systems have been cold and so they are predominantly dropping snow on the watershed. As of Feb. 1, the systems total water storage was just over 1.3 million acre-feet, or about 92% of capacity. Kellie Hwang is the newsletter editor for The San Francisco Chronicle. 95 percent of. Folsom Lake is letting the water flow out. While forecasters can predict the likelihood of future rainfall over large areas, they cant pinpoint it to the degree needed to determine whether a particular watershed/reservoir will overflow and cause damage and loss of life. thanks. Echoing the sentiments of famed naturalist John Muir, members say the glacially-carved Hetch Hetchy Valley that the reservoir sits in is comparable in grandeur to Yosemite Valley and should not be flooded. It was the only tool that I could find that would allow me to make a vertical marimekko graph. 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.
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