An improvement: Could you include a bar for Last year at this date? In fact, thanks to a little snowmelt, water levels were up for all reservoirs from December to January. 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. Restore Hetch Hetchy. YTD values are from January 1 . Sacramento CA 95833, Everything about California water that matters, Western States Water Agencies and Districts. Shasta is the reservoir with the largest capacity and so it is the tallest row. Very nice work. Hetch Hetchy Reservoir in Yosemite National Park is seen in 2022. 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. 7 days 30 days Its supposed to be brown. No it is correct. This local water is captured in reservoirs located in San Mateo and Alameda counties. 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. As of Feb. 1, the systems total water storage was just over 1.3 million acre-feet, or about 92% of capacity. document.getElementById('globes').contentWindow.location.reload(); Id love to see how much water is being / has been released from these reservoirs. Even with the latest precipitation, Folsoms values was unchanged. Meant this comment for the integrated snowpack and reservoir view. Yep. Also a little nit. 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. Secure .gov websites use HTTPS This is a marimekko (or mekko) graph which may take some time to understand if you arent used to seeing them. 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. The problem is that we have no idea of knowing ahead of time what kind of storms well have and how long theyll last, but the reservoir operators have to be super careful and extra cautious, so they periodically let the water flow out. 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. For some strange unknown reason, they are not allowing the lake to fill up. United States. Gavin Newsom asked all California residents to voluntarily reduce use by 15% compared with use in 2019. 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. 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. diversion of water? Restore Hetch Hetchy claimed the phrase had This dashboard is great! Also, do they provide inflows and outflows for locations? I think the problem is with the CDEC database (as the LakesOnline website also has had incorrectly high information). HETCH HETCHY RES A HETCH HETCHY CA. For the first week of February, there was a slight increase for most reservoirs from January amounts. You can also use it to monitor only the reservoirs you are most interested in. Folsom is like an overflow tank. More about the Tuolumne River Voluntary Agreement can be found athttp://www.tuolumnerivermanagementplan.com. 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. Related articles . For perspective, water demand across the SFPUCs service area of 2.7 million people was about 205,000 acre-feet last fiscal year. Didnt realize how bad things were there. Great graphs and very useful. And more work is underway. the map graph doesnt include berryessa. 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 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. It looks like the red and blue lines are backwards on Folsom. All of this work is nothing short of brilliant. a minimum, according to the San Francisco Public Utilities not passed until 1928 five years after the dam was built. Park visitors walk across OShaughnessy Dam in Yosemite National Park on Sept. 1. We own and operate the Hetch Hetchy Regional Water System which serves 2.7 million customers. With modest additional investments San Francisco will be able to maintain an uninterrupted supply of high quality Tuolumne River water. I noticed that Folsom does not change whereas every reservoir changes on an hourly update. During most years, there will be a 30-day shut down of the Hetch Hetchy source in the winter months. Its important to note that other communities in California have taken actions in far greater magnitude than SF to make our waterways more sustainable. The current power produced by the SFPUC system, although not carbon-based, is not green since it requires the continued destruction of significant habitat. This is the first state (of 6 I have lived in) that has had water police and restrictions. Saved to my favorites now. proposition that would have funded an $8 million study on how 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. 2151 River Plaza Drive, Suite 205 Shasta, Oroville, Hetch Hetchy and many others were built by damming large rivers. For the class we based all our designs on the USACE spillway design manual. The middle portion of the watershed from New Don Pedro Reservoir to above Hetch Hetchy Reservoir is characterized by deep canyons and forested terrain. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. 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. The soaking was welcome in a drought-plagued state with a diminishing water supply. Hi Keith, you could de-select the large reservoirs from the menu at the top right. 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. Northern California's reservoir levels continued to rise in the week after an atmospheric river slammed the state with torrential rain and high winds. It was the only tool that I could find that would allow me to make a vertical marimekko graph. River. 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. Trailhead address: Evergreen Road (Hetch Hetchy Road), Yosemite National Park, CA 95321. Hetchy Reservoir can store as much as 117 billion gallons for the The new 68-mile (109 km) railroad wound its way up the narrow canyon of the Tuolumne River past sharp curves and up steep 4% grades. 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. 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. The trail includes spectacular views of Tueeulala and Wapama Falls. Especially for small ones it is hard to identify them and click on them. United States. Your Privacy Choices (Opt Out of Sale/Targeted Ads). There doesnt seem to be any site that shows the impact of each storm. The amount stored is increasing, just not by a lot. }, false); Lake Tahoe really isnt part of California water, as the outflow goes to Nevada. While the long-term voluntary agreement work continues, the SFPUC does not want to wait to restore the Tuolumne Rivers ecosystem. This is a very clear graph and I cannot imagine the hours you have put in while setting it up and doing the maintenance. 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. You dont see runoff right away, the snow is still up there, frozen, doing what we want it to do, he said. Heres where California reservoir levels stand after this weeks rains. SFPUC said as of this week, the Hetch Hetchy reservoir is at 92 percent capacity. The Bay Area's main reservoir is up 21 feet. window.addEventListener("orientationchange", function() { I have to agree with many people here what a great job making such a clear graph of whats happening. 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. The adopted Plan addresses water quality issues affecting the ecosystem and fisheries of the Bay-Delta system. Begin at O'Shaughnessy Dam. Water data back to 1956 are available online. 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 Omar, Thanks! I love this this site too. System for more than 60 percent of their drinking water. This file photo shows Shasta Lake. Over the summer, Gov. Although Hetch Hetchy Reservoir is the most well-known, it stores less than 25% of the system's water. Why is Lake Nacimiento and Lake San Antonio not listed? The reservoir was at 75 percent capacity as of May 5, totaling 269,963 acre-feet of water (an acre-foot is nearly 326,000 gallons). Secure .gov websites use HTTPS Thats a very poor design. 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. Trailhead coordinates: 37.946905, -119.787376 (37 56 48.85N 119 47 14.55W) During the winter months, they let water out of the reservoirs in anticipation of large storms. A 1 week change would be interesting to show on each. She is a University of Washington graduate. 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. Lake Shasta, the state's largest reservoir, rose 2.9 feet and added 31,020 acre-feet of water. 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. Lock This is my first year watching the levels, so maybe Im missing something. currently, there is a lot more water coming in than going out. Email: kellie.hwang@sfchronicle.com, Yoohyun.Jung@sfchronicle.com Twitter: @KellieHwang, @yoohyun_jung. There is something strange about the data over the last two days (Jan.17 to Jan. 19): It certainly looks dry at least until the last week in February, he said. Thank you for a beautiful job. Similar findings are described in theUC Davis studyRe-Assembling Hetch HetchyandUS Bureau of Reclamation study. Voters rejected a 2012 Commission. While it may seem that Decembers production could get us through the rest of the season, Rizzardo explains that in hydrology, you need consistent water shed to keep soils happy. He fears that without more precipitation this season, well enter our third very dry year. Horoscope for Friday, 3/03/23 by Christopher Renstrom, No seriously, dont drive up to Tahoe this weekend, Wife of Jeffrey Vandergrift issues somber update, Snowboarder dies at Tahoe ski resort following historic blizzard, Scream publicity stunt floods Bay Area dispatch with 911 calls, The best fried chicken is at a San Francisco strip club, Rain reenters Bay Area forecast: Have an umbrella near you, The Warriors broke Russell Westbrook, just like old times, Mochi muffin bakery closes SF cafe after just 4 months, Arrest in killing of woman seen running through Tahoe campground, Oakland ransomware attackers leak 'confidential' data, California Department of Water Resources website, 14 things you need in your car before you drive to Tahoe. Official websites use .gov In another sign that Californias drought is easing, San Francisco captured more than a years worth of water in just one months time. generates electricity for the city). 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. 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. So my question is, How do we know if we are saving the water for later release (late summer) or are we releasing it to the ocean? I live close to Eastman Lake. 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. 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. But they'll cost you, Fight at high school basketball game in S.F. 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. globe.height = globe.contentWindow.document.body.scrollHeight+40+"px"; I would think with the rain it would get to historical average and then more outflow would happen. In Yosemite National Park, the Hetch Hetchy reservoir relies. Next feature request: wire in aquifer level data! 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. If a reservoir gets filled to 100% and more, the dam will break and many cities will get flooded, so the operators are careful. This hike follows the shoreline of the reservoir with moderate up and downhill hiking. Yoohyun Jung is the Deputy Data Editor for The San Francisco Chronicle. James Q. Martin / Restore Hetch Hetchy Show More Show Less 4 of 7 Our flagship blog features analysis of news from our staff and announcements of upcoming events. has a graph which shows how the historical avg changes throughout the year (oscillating between ~15000 and ~21000). 2022 All Rights Reserved. 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). 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. Construction of the regional water system proceeded over the following 20 years, with water first delivered in 1934. Great stuff. Assistant General Manager for Water Steven Ritchie credits the way the system is managed along with lower. Sometimes this is well done sometimes it is poorly done. } I appreciate the information you are providing. Even with all the rain and floods, still a long way to fill them to 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 height of the row indicates how much water the reservoir could hold. The overall storage is said to have dropped by 57.4 to 56.4 (or 302 kaf). Thats a great suggestion and one that would be particularly helpful! 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. Kurtis Alexander is an enterprise reporter for The San Francisco Chronicle, with a focus on natural resources and the environment. David Rizzardo, hydrology section manager for the California Department of Water Resources, said there are a lot of factors that affect reservoir storage. City officials have touted their efforts to help salmon, for example by timing water releases to assist with migration and restoring breeding grounds. Crystal Springs Reservoir, along Highway 280 in San Mateo County, was 89 percent . Important Legacy real-time page. 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. The Hetch Hetchy Reservoir in Yosemite delivers water to 2.6 million Bay Area residents every day. Your tools are awesome just hurts when you receive bad data at times! provides water to 2.7 million residents and businesses in the San I see many of the local canals flowing with lots of water. The judge also noted the provision of the state rejected by an appellate court and the California Supreme Court Top ways to experience Hetch Hetchy Reservoir and nearby attractions Yosemite: Audio Driving Tour 1 Full-day Tours from $9.99 per group (up to 8) Private Yosemite Explorer Package | 3 Days of Adventure 3 Private and Luxury from $750.00 per adult (price varies by group size) Private Family Photo Day in Yosemite 78 Recommended Full-day Tours from It used to be full (and beyond). earthquake. setTimeout(function (){ Our drinking water comes from a variety of protected sources carefully managed by the SFPUC. Forty-six percent . Remember, much of the state is still in a drought and so the prudence is warranted.. Why isnt Lake Sonoma included? 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. 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, Here's where California reservoir levels stand after this week's rains, Going to Tahoe this weekend? At times, nearly 90% of the flow of the Tuolumne River is piped off by the SFPUC and other water agencies in the region. How can I apply to SFPUC? Occasionally the source water will shift to local reservoirs during routine maintenance to the conveyance system. ) or https:// means youve safely connected to the .gov website. It carried workers and materials for the dam, as well as tourists, postage and other amenities. Different presidential administrations also have tried to address } California Reservoir Levels - Dashboard and visualization showing current water levels in California reservoirs . Owned by the city of San Francisco, Hetch Hetchy Reservoir And early forecasts show the rest of the wet season is not likely to produce enough precipitation. Nate, thanks for the insight. DWR is one of many local, State and Federal entities that dictate water releases. Is it because the laws have changed on how much each reservoir can hold or is it in anticipation of significantly more rain? A small portion of the citys water comes from local reservoirs. This chart only shows reservoirs filled via natural flow/rainfall. Local reservoir inflows have negative daily flow rates set to zero. I am new to the state. Water data back to 1930 are available online. Nice! finding an alternative water and power source (Hetchy Hetchy also I hear from the farmers that we waste 80% of the water by flushing it into the ocean. I also hear the environmentalists say, the streams and wildlife need water, so flush it into the ocean. Its an interesting dilemma. Hours: Year-round, but only accessible by car when the Hetch Hetchy Road is open. By a large measure, damming and flooding Hetch Hetchy is the most significant damage ever allowed in any of our national parks. After record snowfall in December was followed by a dry January, there are renewed concerns of drought. Thanks for developing it, and for sharing it with the rest of us! Generation at Holm powerhouse below Cherry Lake would be less affected. This is wonderful information. The average for this time of year is approximately 4,659.57ft, plus or minus 39ft. function reloadiframes(){ 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. The area around Shasta has more volcanic soils that absorb rainfall than the Feather River drainage. The reservoir is eight miles long and the largest single body of water in Yosemite. Lake ShastaLevel before the storm on Oct. 22: 882.57 feetLevel after the storm on Nov. 1: 885.47 feetTotal rise: 2.9 feet, Storage before the storm: 970,859 acre-feetStorage after the storm: 1,001,879 acre-feetTotal storage increase: 31,020 acre-feet, Lake OrovilleLevel before the storm: 630.80 feetLevel after the storm: 661.20 feetTotal rise: 30.4 feet, Storage before the storm: 799,638 acre-feetStorage after the storm: 982,263 acre-feetTotal storage increase: 182,625 acre-feet, Hetch HetchyLevel before the storm: 3,729.68 feetLevel after the storm: 3,750.99 feetTotal rise: 21.31 feet, Storage before the storm: 221,500 acre-feetStorage after the storm: 257,800 acre-feetTotal storage increase: 36,300 acre-feet, Trinity LakeLevel before the storm: 2,209.55 feetLevel after the storm: 2,213.22 feetTotal rise: 3.67 feet, Storage before the storm: 648,675 acre-feetStorage after the storm: 672,930 acre-feetTotal storage increase: 24,255 acre-feet, Folsom LakeLevel before the storm: 370.28 feetLevel after the storm: 390.33 feetTotal rise: 20.05 feet, Storage before the storm: 214,225 acre-feetStorage after the storm: 318,577 acre-feetTotal storage increase: 104,352 acre-feet, New Melones LakeLevel before the storm: 916.28 feetLevel after the storm: 917.09 feetTotal rise: 0.81 feet, Storage before the storm: 822,619 acre-feetStorage after the storm: 827,786 acre-feetTotal storage increase: 5,167 acre-feet, Don PedroLevel before the storm: 723.96 feetLevel after the storm: 727.41 feetTotal rise: 3.45 feet, Storage before the storm: 970,226 acre-feetStorage after the storm: 995,836 acre-feetTotal storage increase: 25,610 acre-feet, McClureLevel before the storm: 663.70 feetLevel after the storm: 672.27 feetTotal rise: 8.4 feet, Storage before the storm: 180,900 acre-feetStorage after the storm: 198,467 acre-feetTotal storage increase: 17,210 acre-feet. 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. required on whether to demolish OShaughnessy Dam. Restore Hetch Hetchys subsequent appeal to the ruling was Could you also show each reservoirs level as a function of time? 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. This dashboard provides a bit more detail on the state of each of the reservoirs while also showing an aggregate total. At this facility, which is shared with other water agencies, the city can stash water for credits against future draws on the river. Privacy Policy | 2011-2021 San Francisco Public Utilities Commission. Add a button to convert the row heights to log scale. Previously, Kellie covered dining news and trends, visual arts, events and nightlife for the Arizona Republic, and freelanced for the former Contra Costa Times. 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. 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. Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. After the reservoirs The blue line indicates the reservoirs water level one year ago today. 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. Good info to know. This was helpful to project seasonal trends & storm impacts. 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 . "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 second that request. 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. So they should be saving much more and deal with the .000001 of risk later. That puts it at 84 percent of where it would usually be usually at this time of year. Copyright 2023Water Education Foundation. Lake Shasta and Mendocino are also well below average. The half-hour drive to Hetch Hetchy from CA Highway 120 begins outside the park boundaries. What happened to the Hetch Hetchy level? My guess would be that the recent systems have been cold and so they are predominantly dropping snow on the watershed. Best of luck out there in California! Curious why Shasta lake seems to be making big gains in water coming in and Trinity not so much? Im curious: Lk Almanor is the 8th largest reservoir in CA. Yes, and why is Twitchell Dam also not listed? Only modest new supplies would be required in the driest years. 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. For example, the average storage level for Feb. 7 is usually 65% of capacity for Trinity Dam, but currently its at 31%. 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. The surplus has renewed concerns about San Francisco stockpiling water at the expense of rivers and the fish and wildlife that live there. From the main road, it's about a 20- to 25-minute drive to the parking area. But tearing down O'Shaughnessy Dam in order to restore Hetch Hetchy Valley would be a disaster. 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. Lock Thats just another very strong indication visually that its a big water year.. It used to be full (and beyond). 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 . Californias largest water agencies, in both the urban and agricultural sectors, have invested in ambitious groundwater banking programs inKern County. San Franciscos Hetch Hetchy water system is almost full for the first time in years.
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