From the main road, it's about a 20- to 25-minute drive to the parking area. Meanwhile, the group Restore Hetch Hetchy is urging the SFPUC to abandon Hetch Hetchy Reservoir. 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. 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. a minimum, according to the San Francisco Public Utilities I dont know if weve seen anything like this in October before.". by the Raker Act. 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). Great Job on this site! Meant this comment for the integrated snowpack and reservoir view. The soaking was welcome in a drought-plagued state with a diminishing water supply. Hetch-Hetchy predicted to fill by end of the snowmelt period 2020-2021 Winter season continues to be dry 2019-2020 was dry, although key differences Feb. 2020 was unusually warm, which impacted snowfall levels and water demands; Feb 2021 was cooler, and hence snowfall level higher and water use lower It would be really interesting to visualize whether were able to replenish ground water this year after all the precipitation. Love easy to read and understand information. San Franciscos Hetch Hetchy water system is almost full for the first time in years. The extensive amount of storage, which is designed to benefit the Bay Area as droughts become more severe with climate change, has become a sticking point in a longstanding environmental battle over how much water the city should be taking from rivers. This is a marimekko (or mekko) graph which may take some time to understand if you arent used to seeing them. 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. A separate vote would have been I havent spent much time looking at it but that data is on the CDEC website. supplies water to the San Francisco Bay Area. 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). Long-term values for reservoir inflows use maximum number of complete water years in record. California reservoir levels: . Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. Not only does it supply 85 percent of the water for 2.6 million people in San Francisco, controlled releases via the O'Shaughnessy Dam are helping preserve downstream specieseven in dry . The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. 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. proposition that would have funded an $8 million study on how But they'll cost you, Fight at high school basketball game in S.F. 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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. diversion of water? Restore Hetch Hetchy claimed the phrase had Isabella is filling quite slowly in order to test out the new $500 million spillway. And more work is underway. Lock What period does CA use for Historical Average? It will be very different depending on the period chosen. Twenty of San According to the San Francisco Public Utilities Commission, Hetch and its snowmelt-fed water supply, water from Hetch Hetchy Best of luck out there in California! In 2021, the SFPUC and the Modesto and Turlock Irrigation Districts launched a proactive pilot program with the U.S. So they should be saving much more and deal with the .000001 of risk later. I live in the central valley. "It was a very healthy shot in the arm. Together, the BAWSCA agencies account for two-thirds of water consumption from the system and pay for two-thirds of its upkeep. Lake Oroville. I second that request. I had a class in spillway design many years ago. 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. environmental context. ", The difference in soil type in the two watersheds was likely another factor. More about the Tuolumne River Voluntary Agreement can be found athttp://www.tuolumnerivermanagementplan.com. Just a wistful thought, it would be really cool to graph the water release statistics. the Bay Area. 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. Heres an example of that data for Shasta, where you can see the daily inflows and outflows: So many facets beautifully chartered. Water data back to 1956 are available online. Our flagship blog features analysis of news from our staff and announcements of upcoming events. generates electricity for the city). YTD values are from January 1 . Flood control agencies (not DWR) have the most say in regard to releases. Spring snowmelt runs down the Tuolumne River and fills Hetch Hetchy, the largest reservoir in our water system. So included in DWR #S. They are releasing water into the canals. What happened to the Hetch Hetchy level? 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. It seems likely one of those two readings is wrong. This is the first state (of 6 I have lived in) that has had water police and restrictions. But the growing water reserves dont please everyone. proposed as a source of water following the 1906 San Francisco }, false); Lake Tahoe really isnt part of California water, as the outflow goes to Nevada. This November, a group of environmental advocates will put forth a ballot measure that would require the San Francisco Public Utilities Commission to develop a plan to drain Hetch Hetchy. Im curious: Lk Almanor is the 8th largest reservoir in CA. Its fluctuating between ~107% and ~20% from one hour to the next (reading 107.6 atm). If you click on the list button in the top right of the dashboard, it will show a list of the reservoirs (in order of size from largest to smallest) and you can check which ones you would like to display. 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. Omar, Thanks! Climbers Timmy O'Neill (left) and Lucho Rivera atop a wall overlooking Hetch Hetchy Reservoir. Also, do they provide inflows and outflows for locations? This is wonderful information. That includes the Tuolumne River, which provides water via Hetch Hetchy Reservoir to Bay Area customers. Copyright Barry Rokeach, 2014. }, 150);
draining the reservoir to court, arguing in 2015 that the Hetch Hetchy Water System The system originates more than 100 miles from its primary customers, in Yosemite National Park. 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. Lake Mendocino and Lake Berryessa water levels stayed the same. It was the only tool that I could find that would allow me to make a vertical marimekko graph. Its currently listed on this page as 29kaf full, but the usgs.gov page below says Hetch Hetchy is at 299.7kaf full. This file photo shows Shasta Lake. . The reservoir is eight miles long and the largest single body of water in Yosemite. thanks. This website along with another shows that Eastmans level is still rising even though we have not had rain in more than a week. 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. Over the summer, Gov. They placed a few dissipators just before the river. 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. A wet December produced ample snowfall, which is still sitting at high elevations. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NAVD 1988, LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929, and RESERVOIR STORAGE are available. Its just small enough that the name doesnt appear as the bar is too thin. But tearing down O'Shaughnessy Dam in order to restore Hetch Hetchy Valley would be a disaster. 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. According to the San Francisco Public Utilities Commission, Hetch Hetchy Reservoir can store as much as 117 billion gallons for the Hetch Hetchy Regional Water System, which serves San Francisco, Santa Clara, Alameda and San Mateo counties. Heres where California reservoir levels stand after this weeks rains. Having it here would be great! Is that a good thing? The surplus has renewed concerns about San Francisco stockpiling water at the expense of rivers and the fish and wildlife that live there. The captured water is piped 150 miles to the Bay Area. The reservoir is now projected to cost $4.4 billion, with Prop. If you are on a mobile device you can tap the reservoir to get that same info. California Reservoir Levels - Dashboard and visualization showing current water levels in California reservoirs . Save my name, email, and website in this browser for the next time I comment. Francisco Bay Area. Diamond Valley Lake is a man-made storage reservoir for storing imported water only. System for more than 60 percent of their drinking water. A .gov website belongs to an official government organization in the After record snowfall in December was followed by a dry January, there are renewed concerns of drought. 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. Much of the water passing through Holm would be diverted into the Mountain Tunnel and be used to generate power a second time at the Moccasin powerhouse. Maybe bad data. Lake Shasta, the state's largest reservoir, rose 2.9 feet and added 31,020 acre-feet of water. In Yosemite National Park, the Hetch Hetchy reservoir relies. 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. 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. Folsom is like an overflow tank. and maybe another vertical axis to the right of that with reservoir capacity. Remaining Capacity text in the legend should be brown? window.addEventListener("orientationchange", function() {
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). Why isnt Lake Sonoma included? Curt, Good point re the colder weather dropping more snow instead of rain at higher elevations this year. 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. They also built a spillway that was too steep and did not install energy dissipators along the spillway. "In contrast, the Shasta Lake drainage had only a couple of stations in excess of 10 inches whereas most received less. There doesnt seem to be any site that shows the impact of each storm. The area around Shasta has more volcanic soils that absorb rainfall than the Feather River drainage. This dashboard is great! Water data back to 1956 are available online. And while one storm didn't come close to ending the drought, some reservoirs in Northern California, especially those that fell right in the path of the storm, saw significant gains. San Francisco maintained the phrase only Privacy Policy | 2011-2021 San Francisco Public Utilities Commission. "It's an increase of a few percent, . It wont be full until Spring snowmelt. The source water from SFPUC is typically from the Hetch Hetchy reservoir located in the Sierra Nevada Mountains. 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. 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. During late summer and early fall, it will be necessary to move stored supplies from Cherry or Don Pedro Reservoirs into the pipeline. A small portion of the citys water comes from local reservoirs. Read more about the data team and their work. David Rizzardo, hydrology section manager for the California Department of Water Resources, said there are a lot of factors that affect reservoir storage. This other page: I like the comparisons of last year, and the historical average. Required fields are marked *. Thanks. We provide water directly to customers in San Francisco and wholesale through 26 Water agencies in Alameda, Santa Clara, and San Mateo counties. Is the Stanley Quencher tumbler worth its TikTok hype? scenic mountain valley in a national park. Part of the lake is on the California side, but it has zero California water impact beyond the immediate Tahoe residents. Hetch Hetchy Regional Water System The Hetch Hetchy watershed, an area located in Yosemite National Park, is the major source of water for all of San Francisco's water needs. 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. Folsom Lake is letting the water flow out. Units are in kaf, thousands of acre feet. Secure .gov websites use HTTPS sends student to hospital, Heres how much rain and snow is on the way this weekend, Your Privacy Choices (Opt Out of Sale/Targeted Ads). Are they releasing water to relieve the pressure in anticipation of more water? Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. Stay up-to-date with breaking news and upcoming events. Share sensitive information only on official, secure websites. An official website of the United States government. The group says the recent plethora of water shows that the city could do without Hetch Hetchy Reservoir, by using other storage facilities that have filled and pursuing new projects to capture the surplus. 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. Data and Tools Awesome work!! 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. best to drain the valley. globe = document.getElementById('mekko');
"This was rare for October. In 2007, the Bush Should be fixed at some point. 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. It is on the graph. If you look at the inflow data on the major reservoirs, its pretty flat. I have to agree with many people here what a great job making such a clear graph of whats happening. setTimeout(function (){
http://www.tuolumnerivermanagementplan.com. If a reservoir gets filled to 100% and more, the dam will break and many cities will get flooded, so the operators are careful. Restore Hetch Hetchy. Your Privacy Choices (Opt Out of Sale/Targeted Ads). February 21, 2023 - BAWSCA Statement on State Water Resources Control Board'sSchedule for Consideration of a Voluntary Agreement for the Tuolumne River. As of Feb. 1, the systems total water storage was just over 1.3 million acre-feet, or about 92% of capacity. Tracy Barbutes, Freelance / Special to The Chronicle, Heres where California reservoir levels stand after this weeks rains. In addition, San Francisco receives approximately one-tenth of its power from hydroelectricity generated by the gravity-driven flow from the Hetch Hetchy Reservoir. reserved. 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?
Thats a very poor design. 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. The Water Education Foundation is a nonprofit, tax-exempt, Therefore flood control agencies take the more conservative route and order the release of water. The water transmission system in the Bay Area and Peninsula includes the Bay Division, San Andreas, Sunset Supply, and Crystal Springs pipelines. As of 5pm on 1/18, the data appears correct (~58k acre feet), but an hour ago it was reading off the chart (3X above what they are allowed to store right now). For each of the top 8 reservoirs the storage has increased by a total of 217 kaf, however). We own and operate the Hetch Hetchy Regional Water System which serves 2.7 million customers. Trailhead address: Evergreen Road (Hetch Hetchy Road), Yosemite National Park, CA 95321. What rates am I paying? For example, the average storage level for Feb. 7 is usually 65% of capacity for Trinity Dam, but currently its at 31%. If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. Email: kellie.hwang@sfchronicle.com, Yoohyun.Jung@sfchronicle.com Twitter: @KellieHwang, @yoohyun_jung. Also a little nit. Call 209-372-0200 for the latest road and weather conditions, Hetch Hetchy Road Daily Hours: 8 am to 5 pm I recently joined the team with Restore Hetch Hetchy as Engagement & Development Director. 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. Northern California's reservoir levels continued to rise in the week after an atmospheric river slammed the state with torrential rain and high winds. 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. Francisco Public Utilities Commissions 26 wholesale customers She has been with SFGATE for more than 10 years. That cant be right. Restoring Hetch Hetchy will require some changes in how San Francisco moves and stores water. They are draining it currently so that it can serve as that overflow if needed given how much rain is coming down and expected over the next week. Next feature request: wire in aquifer level data! Data have been checked by the reporting agency. 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. Yep. 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%. 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 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. administration attempted to allocate funds to study removing the pertained to water that was wasted, and there was no claim that Locked padlock The water travels through a series of pipelines before it reaches the Bay Area and blends with five local reservoirs. 2013, photo, the Hetch Hetchy Reservoir is hazy with smoke . To reach Hetch Hetchy, you have to exit Yosemite National Park and re-enter it. The trail takes you to the base of Wapama Falls, passing two smaller waterfalls (during spring) on the way. Hoping they start building more reservoirs soon. This local water is captured in reservoirs located in San Mateo and Alameda counties. You can find the charts below from the California Department of Water Resources website. Santa Clara, Alameda and San Mateo counties. Within San Francisco, we manage water distribution in the City. Locked padlock Restore Hetch Hetchys subsequent appeal to the ruling was BAWSCA agencies advocated for the capital improvement program that was adopted by the SFPUC in 2002, and are actively monitoring its implementation. Related articles . The blue line indicates the reservoirs water level one year ago today. mandate within Its great seeing all the reservoirs in California at or near historical averages. 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). 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. Although Hetch Hetchy Reservoir is the most well-known, it stores less than 25% of the system's water. The SFPUC has also raised concerns over the fishery benefits of the States Plan. For detailed analysis of how San Franciscos water system will operate without Hetch Hetchy reservoir, see the Environmental Defense Funds studiesParadise RegainedandCherry Intertie Alternative. 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 1913 Raker Act authorized the unprecedented dam inside the park and also set the fee that the city pays to rent the entire valley in which the dam sits: $30,000 per year. This is a great and very thoughtfully designed web site!
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