At the moment, I am not interested in the debate. pertained to water that was wasted, and there was no claim that I havent spent much time looking at it but that data is on the CDEC website. Begin at O'Shaughnessy Dam. Restore Hetch Hetchy intends to undo this Great American mistake, and return the valley to Yosemite National Park and all people. It seems likely one of those two readings is wrong. The construction of the Hetch Hetchy Railroad took place from 1915 to 1918. 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). 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. The amount stored is increasing, just not by a lot. 2022 All Rights Reserved. If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. 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. Hetch Hetchy is only one of nine reservoirs in the San Francisco Public Utility Commissions water system. 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. And early forecasts show the rest of the wet season is not likely to produce enough precipitation. mandate within Our drinking water comes from a variety of protected sources carefully managed by the SFPUC. 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. Why is Lake Nacimiento and Lake San Antonio not listed? That said, most of its outflow makes its way down Feather River (via Rock Creek Reservoir) and ultimately into Orville. If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. Kurtis Alexander is an enterprise reporter for The San Francisco Chronicle, with a focus on natural resources and the environment. The adopted Plan addresses water quality issues affecting the ecosystem and fisheries of the Bay-Delta system. Thank you for a beautiful job. I am new to the state. All of this work is nothing short of brilliant. They also built a spillway that was too steep and did not install energy dissipators along the spillway. In addition, San Francisco receives approximately one-tenth of its power from hydroelectricity generated by the gravity-driven flow from the Hetch Hetchy Reservoir. She has been with SFGATE for more than 10 years. Central Valleyfarms have installed enough drip irrigationstrips to reach the moon and back, an improvement that also enables more efficient application of fertilizer and pesticides. The judge also noted the provision of the state A truly excellent project. reserved. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. No it is correct. Share sensitive information only on official, secure websites. Restore Hetch Hetchy. scenic mountain valley in a national park. Jeff, the average changes daily as well. over the past few days. Great resource! I notice Briones Reservoir is not on the list. Congressman Tom McClintock has re-introduced theYosemite National Park Equal Access and Fairness Act, a bill that would allow non-motorized Sign up to receive blog posts and other news by email. The upcountry portion of the System begins with Hetch Hetchy Reservoir in Yosemite National Park. Thank you so much for the hard work! 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. Sometimes this is well done sometimes it is poorly done. Its water supply Hetch Hetchy Reservoir, in the Sierra Nevada is 80% full, . Hetch Hetchy water travels 160 miles via gravity from Yosemite to the San Francisco Bay Area. While constructed and owned by San Francisco, the water system was in fact planned to benefit the greater San Francisco Bay Area population. 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. She is also an alumna of Reveal from the Center for Investigative Reporting Investigative Fellowship and The New York Times Student Journalism Institute. 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. A small portion of the citys water comes from local reservoirs. I love this this site too. Lock I previously made a bar graph showing the overall level of water in the major California reservoirs. Restoring Hetch Hetchy Valley will allow all three power plants to remain operational but will reduce power generation at these by about 20% an average of about 350 million kWh per year. Trinity Lake, with a capacity of 2,447,650 acre-feet, had the smallest increase, from 29% in December to 30% in January. Hetchy Reservoir can store as much as 117 billion gallons for the This chart only shows reservoirs filled via natural flow/rainfall. Meanwhile, the group Restore Hetch Hetchy is urging the SFPUC to abandon Hetch Hetchy Reservoir. Kudos to the designers. As it is, at first glance, it looks like shasta is at the top because its 28000 instead of 4552. very nice product overall. Units are in kaf, thousands of acre feet. Its water supply Hetch Hetchy Reservoir, in the Sierra Nevada is 80% full, the ground is saturated and near-record rainfall has occurred in recent days. This is an excellent tool you have put together. This file photo shows Shasta Lake. During most years, there will be a 30-day shut down of the Hetch Hetchy source in the winter months. mobilewarn(); Navigation and Navigable Waters 33.208.82 Hetch Hetchy, Cherry Valley, and Don Pedro Dams and Reservoirs. I would turn this graph, 90 counterclockwise, and start the capacity along the bottom axis from left to right, with the biggest reservoirs on the left and the smaller ones on the right. LK ELEANOR NR HETCH HETCHY CA. 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. a broad meaning that had been previously applied in an Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. Saved to my favorites now. I live in the central valley. The snowpack there, which will eventually melt and flow into reservoirs, is already bigger than the average peak snowpack, which typically comes around April 1. The area around Shasta has more volcanic soils that absorb rainfall than the Feather River drainage. This other page: Hetch Hetchy water travels 160 miles via gravity from Yosemite to the San Francisco Bay Area. Remaining Capacity text in the legend should be brown? the Hetch Hetchy Valley to its natural state. BAWSCA agencies also are implementing water conservation and water recycling projects to help preserve this precious resource for their communities, and are working to identify alternate sources of water supply. An improvement: Could you include a bar for Last year at this date? 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. My guess would be that the recent systems have been cold and so they are predominantly dropping snow on the watershed. BAWSCA agencies advocated for the capital improvement program that was adopted by the SFPUC in 2002, and are actively monitoring its implementation. The water travels through a series of pipelines before it reaches the Bay Area and blends with five local reservoirs. The upcountry portion of the System begins with Hetch Hetchy Reservoir in Yosemite National Park. How can I apply to SFPUC? 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. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. 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. River. Monitoring location 11277500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. Before returning to the Bay Area, she held roles as transportation reporter and trending news reporter at the IndyStar in Indianapolis. 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. 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. Spring snowmelt runs down the Tuolumne River and fills Hetch Hetchy, the largest reservoir in our water system. All rights Privacy Policy | 2011-2021 San Francisco Public Utilities Commission. Waterfalls gushed at Hetch Hetchy after an atmospheric river event in October 2021. The water is delivered by a gravity-based system and aqueduct to Nice! 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. Curt, Good point re the colder weather dropping more snow instead of rain at higher elevations this year. 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. 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. . 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. Its fluctuating between ~107% and ~20% from one hour to the next (reading 107.6 atm). 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). 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. Together, the BAWSCA agencies account for two-thirds of water consumption from the system and pay for two-thirds of its upkeep. 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. All Rights Reserved. Its not possible to see or really interact with the tiniest slivers. 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). Great Job on this site! Click here for the SFPUC's 2020State of the Regional Water System Report. She joined the Chronicle as a data reporter in 2021. So included in DWR #S. Since June 2011, the Water Enterprise has operated the Citys Emergency Firefighting Water System (EFWS, formerly known as the Auxiliary Water Supply System (AWSS)), an independent, high-pressure water supply system for fire suppression. the Bay Area. Should be fixed at some point. Our reservoirs were alarmingly low. The name Hetch Hetchy is derived from a Sierra Miwok Just a wistful thought, it would be really cool to graph the water release statistics. 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? around the Bay Area rely on the Hetch Hetchy Regional Water Wonderful site. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. McClintock bill proposes to improve public access at Hetch Hetchy. 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 looks like the red and blue lines are backwards on Folsom. Thank you for the time and effort in creating the graphs. The Mokolumne River, which originates in the high Sierra, provides more than 90 percent of the East Bay's water and the Owens Valley in the eastern Sierra serves as a key source of water for Los Angeles. Although Hetch Hetchy Reservoir is the most well-known, it stores less than 25% of the systems water. One of the big challenges in water management is controling the release. This is a marimekko (or mekko) graph which may take some time to understand if you arent used to seeing them. This hike follows the shoreline of the reservoir with moderate up and downhill hiking. It wont be full until Spring snowmelt. 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. 501(c)3 organization, federal tax ID #942419885. Department of Water Resources is just another in a long line of completely mismanaged California entities. http://www.tuolumnerivermanagementplan.com. These sources are diverse in both the origin of the supply snowmelt, rainfall and recharge of groundwater and their location within our system. The maximum that the city has put away is 570,000 acre-feet of water. Python is used to extract the data from this page hourly and wrangle the data in to a clean format. Within San Francisco, we manage water distribution in the City. An official website of the United States government. David Rizzardo, hydrology section manager for the California Department of Water Resources, said there are a lot of factors that affect reservoir storage. 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. In response to the Bay-Delta Plan, the SFPUC and the Modesto and Turlock Irrigation Districts have proposed the Tuolumne River Voluntary Agreement, a combination of flow and non-flow measures sufficient to improve all life-stages of native fish populations in the lower Tuolumne River. You can email her at agraff@sfgate.com. James Q. Martin / Restore Hetch Hetchy Show More Show Less 4 of 7 San Francisco's water-bank in Don Pedro Reservoir, downstream on the Tuolumne River, holds twice as much water as Hetch Hetchy. 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. UPDATE: Here's where California reservoir levels stand after this week's rains. Draining Hetch Hetchy without depriving Bay Area residents of Historical average is near unattainable these days. Take CA Highway 120 from the park toward Groveland. 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. The soaking was welcome in a drought-plagued state with a diminishing water supply. use must be reasonable.. Find out more about the system at http://www.sfwater.org, BAWSCA Board Policy Committee Meeting, April 12, 2023 1:30pm. SFPUC said as of this week, the Hetch Hetchy reservoir is at 92 percent capacity. Similar findings are described in theUC Davis studyRe-Assembling Hetch HetchyandUS Bureau of Reclamation study. A .gov website belongs to an official government organization in the 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. Thanks. Thank you! Omar, Thanks! 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. 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. One acre-foot is the equivalent of one acre of land covered in one foot of water. The dam and reservoir are the source for the Hetch Hetchy Aqueduct, which provides water for over . This is my first year watching the levels, so maybe Im missing something. Gavin Newsom asked all California residents to voluntarily reduce use by 15% compared with use in 2019. Share sensitive information only on official, secure websites. The north (side of the reservoir) usually has two waterfalls going at the best of times, but youll see up and down the canyon walls, if you look close, you count there are about 12 waterfalls running now, said Steve Ritchie, the SFPUCs assistant general manager of water enterprise, during a recent drought report to the agencys governing board.
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