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 . 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. 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. So its volume is counted as Orville inflow. The citys water system also includes a water bank at Don Pedro Reservoir along the Tuolumne River, which was full as of Feb. 1. 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 wont be full until Spring snowmelt. 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? California reservoir water levels before and after winter storm Really appreciate the work you did to build this graph. I love this this site too. 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. You can email her at [email protected]. Is that a good thing? Especially for small ones it is hard to identify them and click on them. 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. Good info to know. In Yosemite National Park, the Hetch Hetchy reservoir relies. Absolutely zero reason to be releasing this much water from these reservoirs. Why is Lake Nacimiento and Lake San Antonio not listed? This file photo shows Shasta Lake. She has been with SFGATE for more than 10 years. Commission. According to the SFPUC, the upper reaches of the Tuolumne River have received about 36 inches of rain since the start of the water year in October, almost as much as what the area averages in a year. During late summer and early fall, it will be necessary to move stored supplies from Cherry or Don Pedro Reservoirs into the pipeline. The water is delivered by a gravity-based system and aqueduct to Thank you for a beautiful job. This dashboard provides a bit more detail on the state of each of the reservoirs while also showing an aggregate total. Thanks for providing it for public information. One of the big challenges in water management is controling the release. To reach Hetch Hetchy, you have to exit Yosemite National Park and re-enter it. Amid a worsening drought, water supplies at one important reservoir are BAWSCA Board of Directors Meeting, March 16, 2023, 6:30 PM. it will be cool if there is a way to track the change since Dec or some such date. A Map and Guide to Hetch Hetchy Reservoir at Yosemite - TripSavvy 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. At this facility, which is shared with other water agencies, the city can stash water for credits against future draws on the river. You can also use it to monitor only the reservoirs you are most interested in. diversion of water? Restore Hetch Hetchy claimed the phrase had It was my first time using D3 and it took me a long time to get up to speed. Water data back to 1930 are available online. DWR is one of many local, State and Federal entities that dictate water releases. Water is rapidly flowing into the state's reservoirs. Thats enough to supply the citys service area for perhaps seven years. generates electricity for the city). I previously made a bar graph showing the overall level of water in the major California reservoirs. Although Hetch Hetchy Reservoir is the most well-known, it stores less than 25% of the systems water. This would allow us to see important, but noise-level reservoirs like hetch hetchy. This is the first state (of 6 I have lived in) that has had water police and restrictions. All rights reserved. Winter weather conditions may cause road closures. 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. My guess would be that the recent systems have been cold and so they are predominantly dropping snow on the watershed. And more work is underway. The Bay Area transmission system also includes Irvington Tunnel 1 and Tunnel 2, the Bay Tunnel, and the Crystal Springs Bypass Tunnel. reloadiframes(); There are no alerts at this time. I would like to make one small suggestion:. An official website of the United States government. 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. . Important Legacy real-time page. SF's Hetch Hetchy water system is almost full. Is that a good thing? 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. An improvement: Could you include a bar for Last year at this date? They have restoredMono Lake,improved stream flows on the North Coast and in theCentral Valleyand diminished the threat to native fish in the Bay Delta. Email: [email protected] Twitter: @kurtisalexander. Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. November 10, 2022 - BAWSCA Statement on State Water-Policy Officials, SFPUC, and Districts Sign MOU for Tuolumne River to Help Recover Salmon While Protecting Water Reliability. Folsom is like an overflow tank. BAWSCA agencies advocated for the capital improvement program that was adopted by the SFPUC in 2002, and are actively monitoring its implementation. She joined the Chronicle as a data reporter in 2021. Curious why Shasta lake seems to be making big gains in water coming in and Trinity not so much? A truly excellent project. and its snowmelt-fed water supply, water from Hetch Hetchy But they'll cost you, Fight at high school basketball game in S.F. "It's an increase of a few percent, . Also, do they provide inflows and outflows for locations? 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. Greetings from Mount Laurel New Jersey. a minimum, according to the San Francisco Public Utilities Why isnt Lake Sonoma included? Long-term values for reservoir inflows use maximum number of complete water years in record. Located in the northwest portion of Yosemite National Park, Hetch During most years, there will be a 30-day shut down of the Hetch Hetchy source in the winter months. 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. currently, there is a lot more water coming in than going out. What's taking so long to build a California reservoir? - CalMatters Heres where California reservoir levels stand after this weeks rains. Lock 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. California snowpack hits highest level this century for March. Twenty of San 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. 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. 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. Hetch Hetchy Reservoir - O'Shaugnessy Dam - National Park Service environmental context. So included in DWR #S. Tracy Barbutes, Freelance / Special to The Chronicle, 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. They are releasing water into the canals. 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. Click here for the SFPUC's 2020State of the Regional Water System Report. 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). Wapama Falls (moderate) 5 mi (8 km) round-trip; 2 hours. The snowpack acts as a natural reservoir and slowly releases water.. The judge also noted the provision of the state Whats going on with the water level at Oroville? I am new to the state. I do not see Diamond Valley Lake Resevoir on this page. Despite Record Drought, Hetch Hetchy Reservoir Levels At 92 Percent Its not possible to see or really interact with the tiniest slivers. The Water Education Foundation is a nonprofit, tax-exempt, 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. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. His recent work has examined the impacts of drought, threats to public lands and wildlife, and the nation's widening rural-urban divide. maybe label the vertical axis with aggregate total or system total capacity. This is an excellent tool you have put together. Ill pass it along to friends. P.S. We provide water directly to customers in San Francisco and wholesale through 26 Water agencies in Alameda, Santa Clara, and San Mateo counties. If you are on a mobile device you can tap the reservoir to get that same info. Hetch Hetchy System - BAWSCA She is also an alumna of Reveal from the Center for Investigative Reporting Investigative Fellowship and The New York Times Student Journalism Institute. Over the summer, Gov. Its fluctuating between ~107% and ~20% from one hour to the next (reading 107.6 atm). Required fields are marked *. Diamond Valley Lake is a man-made storage reservoir for storing imported water only. Begin at O'Shaughnessy Dam. Sometimes this is well done sometimes it is poorly done. Copyright Barry Rokeach, 2014. scenic mountain valley in a national park. O'Shaughnessy Dam (California) - Wikipedia While constructed and owned by San Francisco, the water system was in fact planned to benefit the greater San Francisco Bay Area population. The adopted Plan addresses water quality issues affecting the ecosystem and fisheries of the Bay-Delta system. LK ELEANOR NR HETCH HETCHY CA - USGS Water Data for the Nation https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=SHA Great graphs and very useful. The cities, water districts and private utilities represented by the Bay Area Water Supply and Conservation Agency (BAWSCA) rely upon the Hetch Hetchy system for water to protect the health, safety and economic well being of 1.8 million citizens, businesses and community organizations. https://waterdata.usgs.gov/monitoring-location/11275500/#parameterCode=00054&period=P7D. by the Raker Act. I was thinking that it would be interesting to compare inflows and outflows. }, false); Lake Tahoe really isnt part of California water, as the outflow goes to Nevada. O'Shaughnessy Dam was built on the Tuolumne River in 1923 to create Hetch Hetchy Reservoir. Our flagship blog features analysis of news from our staff and announcements of upcoming events. He frequently writes about water, wildfire, climate and the American West. We own and operate the Hetch Hetchy Regional Water System which serves 2.7 million customers. This website along with another shows that Eastmans level is still rising even though we have not had rain in more than a week. 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. function reloadiframes(){ The reservoir is eight miles long and the largest single body of water in Yosemite. If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. Nate, thanks for the insight. Meanwhile, the group Restore Hetch Hetchy is urging the SFPUC to abandon Hetch Hetchy 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. But tearing down O'Shaughnessy Dam in order to restore Hetch Hetchy Valley would be a disaster. Ive been meaning to search for aquifer levels. 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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 . drained by the Tuolumne It is also the amount of water in a cube that is 352 feet per side (about the length of a football field). It does not meet the California definition of renewable energy. 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. Is California's drought over? Here's what you need to know about rain Near the town of La Grange, the river exits the Sierra Nevada foothills and flows through a gently sloping alluvial valley that is incised into Pleistocene alluvial fans. supplies water to the San Francisco Bay Area. The Hetch Hetchy Reservoir in Yosemite delivers water to 2.6 million Bay Area residents every day. 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. For the first week of February, there was a slight increase for most reservoirs from January amounts. Hetch Hetchy is Monitoring location 11275500. What happened to the Hetch Hetchy level? word for a type of wild grass. 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. What period does CA use for Historical Average? It will be very different depending on the period chosen. 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. Hours: Year-round, but only accessible by car when the Hetch Hetchy Road is open. California drought: Charts show where reservoir levels stand after a dry January, Track water shortages and restrictions across Bay Area. San Franciscos Hetch Hetchy water system is almost full for the first time in years. That cant be right. 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. The surplus has renewed concerns about San Francisco stockpiling water at the expense of rivers and the fish and wildlife that live there. San Francisco Should Pay Yosemite the Dam Rent - perc.org This almost happened with the Orville Dam in 2017. 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. 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. Constitution used to support the arguments to remove the dam was Gavin Newsom asked all California residents to voluntarily reduce use by 15% compared with use in 2019. Thats a great suggestion and one that would be particularly helpful! This local water is captured in reservoirs located in San Mateo and Alameda counties. reserved. Los Angeles,Orange CountyandSan Josehave developed ambitious water recycling programs and have vastly improved local groundwater management. Hetch Hetchy is one of nine reserviors in a water system that serves San Francisco and other Bay Area communities.
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