I noticed that Folsom does not change whereas every reservoir changes on an hourly update. That said, most of its outflow makes its way down Feather River (via Rock Creek Reservoir) and ultimately into Orville. They also built a spillway that was too steep and did not install energy dissipators along the spillway. Hetch Hetchy has generated controversy since it was first If you are on a mobile device you can tap the reservoir to get that same info. Water data back to 1930 are available online. 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. Visualization was done in javascript and specifically the D3.js visualization library. In Yosemite National Park, the Hetch Hetchy reservoir relies. Maybe bad data. How can I match up other monitoring locations similar to the ones on this Interactive Dashboard? How can I apply to SFPUC? In 2007, the Bush The advocacy group Restore Hetch Hetchy took its case for Greetings from Mount Laurel New Jersey. This is a marimekko (or mekko) graph which may take some time to understand if you arent used to seeing them. Is that from melting snow and rain water coming from the mountains and filling it up? It has no natural inflow or out flow. Thats a very poor design. DWR is one of many local, State and Federal entities that dictate water releases. The reservoir is now projected to cost $4.4 billion, with Prop. Part of the lake is on the California side, but it has zero California water impact beyond the immediate Tahoe residents. California drought: Charts show where reservoir levels stand after a dry January, Track water shortages and restrictions across Bay Area. It could be the 180% of historical average of snowpack, which will be melting in a couple months. From the main road, it's about a 20- to 25-minute drive to the parking area. 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. Have you looked into that side of the water management equation? proposed as a source of water following the 1906 San Francisco Kellie Hwang is the newsletter editor for The San Francisco Chronicle. 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. 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. 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. 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. The Water Education Foundation is a nonprofit, tax-exempt, Then it has the appearance of something filling up, while still providing all the detail. Maybe just acre/ft with ^ or down arrow. A separate vote would have been Last week, I paid a visit to Hetch Hetchy. 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. Especially for small ones it is hard to identify them and click on them. That puts it at 84 percent of where it would usually be usually at this time of year. Shasta, Oroville, Hetch Hetchy and many others were built by damming large rivers. In addition, San Francisco receives approximately one-tenth of its power from hydroelectricity generated by the gravity-driven flow from the Hetch Hetchy Reservoir. Over the summer, Gov. Department of Water Resources is just another in a long line of completely mismanaged California entities. Eighty-five percent of the water comes from Sierra Nevada snowmelt stored in the Hetch Hetchy reservoir situated on the Tuolumne River in Yosemite National Park. It was the only tool that I could find that would allow me to make a vertical marimekko graph. Here's what that means. An official website of the United States government. Just trying to learn here Thanks so much! 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. 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). In 2021, the SFPUC and the Modesto and Turlock Irrigation Districts launched a proactive pilot program with the U.S. Super frustrating. The trail takes you to the base of Wapama Falls, passing two smaller waterfalls (during spring) on the way. California reservoir levels: . Generation at Holm powerhouse below Cherry Lake would be less affected. "It was a very healthy shot in the arm. Flood control agencies (not DWR) have the most say in regard to releases. Folsom is like an overflow tank. Share sensitive information only on official, secure websites. 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. 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. Your tools are awesome just hurts when you receive bad data at times! Interesting. I appreciate the information you are providing. 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 Hetch Hetchy Valley today with the dam seen in the lower right. This dashboard is great! Hours: Year-round, but only accessible by car when the Hetch Hetchy Road is open. Shasta is the reservoir with the largest capacity and so it is the tallest row. For example, Hetch Hetchy Reservoir in Yosemite National Park provides 85 percent of San Francisco's total water needs. Francisco Bay Area. } earthquake. Arg. For perspective, water demand across the SFPUC's service area of 2.7 million people was about 205,000 acre-feet last fiscal year. 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. Although Hetch Hetchy Reservoir is the most well-known, it stores less than 25% of the system's water. LK ELEANOR NR HETCH HETCHY CA. This almost happened with the Orville Dam in 2017. There doesnt seem to be any site that shows the impact of each storm. 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. While the long-term voluntary agreement work continues, the SFPUC does not want to wait to restore the Tuolumne Rivers ecosystem. Hetch Hetchy is Monitoring location 11275500. Remember, much of the state is still in a drought and so the prudence is warranted.. supplies water to the San Francisco Bay Area. 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. Hetchy refers to a valley in the Sierra Nevada and a reservoir that The citys water system also includes a water bank at Don Pedro Reservoir along the Tuolumne River, which was full as of Feb. 1. 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. required on whether to demolish OShaughnessy Dam. Occasionally the source water will shift to local reservoirs during routine maintenance to the conveyance system. 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. Whats going on with the water level at Oroville? 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 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. San Franciscos water-bank in Don Pedro Reservoir, downstream on the Tuolumne River, holds twice as much water as Hetch Hetchy. their water supply would cost hundreds of millions of dollars at ) or https:// means youve safely connected to the .gov website. The amount stored is increasing, just not by a lot. Reservoir levels rising. 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. . Great URL. proposition that would have funded an $8 million study on how Sacramento CA 95833, Everything about California water that matters, Western States Water Agencies and Districts. I like the comparisons of last year, and the historical average. 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. Hetch Hetchy water travels 160 miles via gravity from Yosemite to the San Francisco Bay Area. The Bay Area's main reservoir is up 21 feet. Having it here would be great! This would allow us to see important, but noise-level reservoirs like hetch hetchy. Email: kellie.hwang@sfchronicle.com, Yoohyun.Jung@sfchronicle.com Twitter: @KellieHwang, @yoohyun_jung. It used to be full (and beyond). I find myself coming back to this every few days to check on our water . So on Jan 10 were at 82% of the average for Jan 10. For the first week of February, there was a slight increase for most reservoirs from January amounts. According to the San Francisco Public Utilities Commission, Hetch The worst possible scenario is it just remains completely dry. 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. 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. What rates am I paying? Copyright Barry Rokeach, 2014. The Bay Area transmission system also includes Irvington Tunnel 1 and Tunnel 2, the Bay Tunnel, and the Crystal Springs Bypass Tunnel. 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. Thanks for the link. Stay up-to-date with breaking news and upcoming events. A 1 week change would be interesting to show on each. The construction of the Hetch Hetchy Railroad took place from 1915 to 1918. What period does CA use for Historical Average? It will be very different depending on the period chosen. 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. Major snowstorm might leave you stranded, New 101 express lanes opens in Bay Area. It was my first time using D3 and it took me a long time to get up to speed. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. The soaking was welcome in a drought-plagued state with a diminishing water supply. https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=SHA Winter weather conditions may cause road closures. This hike follows the shoreline of the reservoir with moderate up and downhill hiking. 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. One gauge in the area has measured 6.12 inches since Oct. 1, which is 899% of normal. But they'll cost you, Fight at high school basketball game in S.F. Kudos to the designers. At the height of the recent drought, they still had at least four years in storage. And for the years they were hoarding water, the salmon-based ecosystem suffered.. Prior to The Chronicle, she worked as a data journalist for Honolulu Civil Beat, a watchdog news organization covering the Hawaiian islands. If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. 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. Heres an example of that data for Shasta, where you can see the daily inflows and outflows: Nate, thanks for the insight. Click here for the SFPUC's 2020State of the Regional Water System Report. To reach Hetch Hetchy, you have to exit Yosemite National Park and re-enter it. Your email address will not be published. What happened to the Hetch Hetchy level? 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. It didnt end the drought, but it was definitely really good," said Ritchie. Voters rejected a 2012 San Francisco operates three medium-sized hydro-electric power plants in the Tuolumne River watershed Kirkwood, Moccasin, and Holm. 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 snowpack acts as a natural reservoir and slowly releases water.. Its supposed to be brown. 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. draining the reservoir to court, arguing in 2015 that the 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. 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. River. This was helpful to project seasonal trends & storm impacts. BAWSCA Board of Directors Meeting, March 16, 2023, 6:30 PM. February 21, 2023 - BAWSCA Statement on State Water Resources Control Board'sSchedule for Consideration of a Voluntary Agreement for the Tuolumne River. 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. Similar findings are described in theUC Davis studyRe-Assembling Hetch HetchyandUS Bureau of Reclamation study. The source water from SFPUC is typically from the Hetch Hetchy reservoir located in the Sierra Nevada Mountains. For detailed analysis of how San Franciscos water system will operate without Hetch Hetchy reservoir, see the Environmental Defense Funds studiesParadise RegainedandCherry Intertie Alternative. Lake Shasta and Mendocino are also well below average. Ill pass it along to friends. 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 For perspective, water demand across the SFPUCs service area of 2.7 million people was about 205,000 acre-feet last fiscal year. drained by the Tuolumne A truly excellent project. Water storage facilities include watersheds, dams, and reservoirs including: Calaveras, San Antonio, Crystal Springs, Pilarcitos, and San Andreas. 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? The water travels through a series of pipelines before it reaches the Bay Area and blends with five local reservoirs. . But Sites would be what's called an off-channel . Kurtis Alexander is an enterprise reporter for The San Francisco Chronicle, with a focus on natural resources and the environment. 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. Good info to know. Units are in kaf, thousands of acre feet. Before returning to the Bay Area, she held roles as transportation reporter and trending news reporter at the IndyStar in Indianapolis. Ive looked at reservoir sights for years. 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. I am new to the state. 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. How Much Water is in California Reservoirs? in 2018. The area around Shasta has more volcanic soils that absorb rainfall than the Feather River drainage. Trailhead address: Evergreen Road (Hetch Hetchy Road), Yosemite National Park, CA 95321. . One acre-foot is the equivalent of one acre of land covered in one foot of water. At times, nearly 90% of the flow of the Tuolumne River is piped off by the SFPUC and other water agencies in the region. Hetchy Reservoir can store as much as 117 billion gallons for the 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. Owned by the city of San Francisco, Hetch Hetchy Reservoir Hoping they start building more reservoirs soon. maybe label the vertical axis with aggregate total or system total capacity. The adopted Plan addresses water quality issues affecting the ecosystem and fisheries of the Bay-Delta system. . Could you also show each reservoirs level as a function of time? 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. Ive added it to my bookmarks for quick reference. 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. Most local reservoir inflow timeseries are too short to calculate long-term values. 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 website along with another shows that Eastmans level is still rising even though we have not had rain in more than a week. 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 . California snowpack hits highest level this century for March. San Franciscos Hetch Hetchy water system is almost full for the first time in years. the Bay Area. I havent spent much time looking at it but that data is on the CDEC website. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. YTD values are from January 1 . Constitution used to support the arguments to remove the dam was Usually with warm ARs, you get a dramatic increase in inflow, which can fill even very large reservoirs relatively quickly, like Oroville in 2017. SFPUC said as of this week, the Hetch Hetchy reservoir is at 92 percent capacity. Great Job on this site! Theyve also seen drought surcharges on their water bills. dam and restoring the valley. Curious why Shasta lake seems to be making big gains in water coming in and Trinity not so much? Find out more about the system at http://www.sfwater.org, BAWSCA Board Policy Committee Meeting, April 12, 2023 1:30pm. I previously made a bar graph showing the overall level of water in the major California reservoirs. 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. 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. So included in DWR #S. Restoring Hetch Hetchy will require some changes in how San Francisco moves and stores water. But the growing water reserves dont please everyone. Water data back to 1956 are available online. If you look at the inflow data on the major reservoirs, its pretty flat. Yoohyun Jung is the Deputy Data Editor for The San Francisco Chronicle. Email: kalexander@sfchronicle.com Twitter: @kurtisalexander. David Rizzardo, hydrology section manager for the California Department of Water Resources, said there are a lot of factors that affect reservoir storage. It would be really interesting to visualize whether were able to replenish ground water this year after all the precipitation. Locked padlock Getting There. After the reservoirs Trailhead coordinates: 37.946905, -119.787376 (37 56 48.85N 119 47 14.55W) All rights With modest additional investments San Francisco will be able to maintain an uninterrupted supply of high quality Tuolumne River water.
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