For example, the average storage level for Feb. 7 is usually 65% of capacity for Trinity Dam, but currently its at 31%. drained by the Tuolumne The worst possible scenario is it just remains completely dry. Thanks for putting this together. Instructions: not passed until 1928 five years after the dam was built. 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 . 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. What happened to the Hetch Hetchy level? 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. Its just small enough that the name doesnt appear as the bar is too thin. Hetch Hetchy Reservoir in Yosemite was 69 percent full on Tuesday, 150 percent of normal for this time of year. In 2007, the Bush 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. SFPUC said as of this week, the Hetch Hetchy reservoir is at 92 percent capacity. 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. Lake Mendocino, which has a capacity of 122,400 acre feet, saw the biggest boost from 17% of storage capacity in December to 35% in January. Water data back to 1930 are available online. My guess would be that the recent systems have been cold and so they are predominantly dropping snow on the watershed. O'Shaughnessy Dam was built on the Tuolumne River in 1923 to create Hetch Hetchy Reservoir. Lake Shasta and Mendocino are also well below average. The windfall of water is welcome news for households and businesses in San Francisco, which use less water on average compared to the rest of the state but nonetheless have faced calls to cut back since 2021 because of water shortages. Is the Stanley Quencher tumbler worth its TikTok hype? There doesnt seem to be any site that shows the impact of each storm. This chart only shows reservoirs filled via natural flow/rainfall. It could be the 180% of historical average of snowpack, which will be melting in a couple months. San Francisco voters have demonstrated their opposition to 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 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. In another sign that Californias drought is easing, San Francisco captured more than a years worth of water in just one months time. I wonder why it doesnt work for you. You can email her at agraff@sfgate.com. This is an excellent tool you have put together. construction in the 1920s, various groups have lobbied to restore 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. If a reservoir gets filled to 100% and more, the dam will break and many cities will get flooded, so the operators are careful. In addition, San Francisco receives approximately one-tenth of its power from hydroelectricity generated by the gravity-driven flow from the Hetch Hetchy Reservoir. What rates am I paying? 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. This other page: their water supply would cost hundreds of millions of dollars at I havent spent much time looking at it but that data is on the CDEC website. Theyve also seen drought surcharges on their water bills. Our drinking water comes from a variety of protected sources carefully managed by the SFPUC. Tracy Barbutes, Freelance / Special to The Chronicle, Heres where California reservoir levels stand after this weeks rains. For each of the top 8 reservoirs the storage has increased by a total of 217 kaf, however). Thats a great suggestion and one that would be particularly helpful! 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). 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. Sacramento CA 95833, Everything about California water that matters, Western States Water Agencies and Districts. . Thanks for taking the time to do that. There are no alerts at this time. After the reservoirs Even with the latest precipitation, Folsoms values was unchanged. Quite an eye opener. Hetch Hetchy Reservoir in Yosemite National Park is seen in 2022. Previously, Kellie covered dining news and trends, visual arts, events and nightlife for the Arizona Republic, and freelanced for the former Contra Costa Times. 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. 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. Navigation and Navigable Waters 33.208.82 Hetch Hetchy, Cherry Valley, and Don Pedro Dams and Reservoirs. Water is rapidly flowing into the state's reservoirs. This is my first year watching the levels, so maybe Im missing something. Occasionally the source water will shift to local reservoirs during routine maintenance to the conveyance system. An official website of the United States government. These graphs will always read low because they represent the percentage of the seasonal average at some point before the end of the season. Love the dashboard! So included in DWR #S. }, false); Lake Tahoe really isnt part of California water, as the outflow goes to Nevada. diversion of water? Restore Hetch Hetchy claimed the phrase had They are releasing water into the canals. Even with all the rain and floods, still a long way to fill them to capacity. How do I contact support? The current power produced by the SFPUC system, although not carbon-based, is not green since it requires the continued destruction of significant habitat. earthquake. 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. One gauge in the area has measured 6.12 inches since Oct. 1, which is 899% of normal. Hi Keith, you could de-select the large reservoirs from the menu at the top right. "It's an increase of a few percent, . So its volume is counted as Orville inflow. Shasta is very large and could hold about 3.5 cubic kilometers of water at full (but not flood) capacity. The blue line indicates the reservoirs water level one year ago today. 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. While constructed and owned by San Francisco, the water system was in fact planned to benefit the greater San Francisco Bay Area population. Crystal Springs Reservoir, along Highway 280 in San Mateo County, was 89 percent . I dont think its currently above the historical average, not below 1 year ago. provides water to 2.7 million residents and businesses in the San Is it because the laws have changed on how much each reservoir can hold or is it in anticipation of significantly more rain? scenic mountain valley in a national park. UPDATE: Here's where California reservoir levels stand after this week's rains. Ive been meaning to search for aquifer levels. 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. May 24, 2022 - BAWSCA Statement About the Adoption of a Systemwide Water Use Reduction of 11%. 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. However, I am interested in how much we are saving. Its important to note that other communities in California have taken actions in far greater magnitude than SF to make our waterways more sustainable. Due to its high-altitude location at 3,900 feet above sea level setTimeout(function (){ River. Hi, I started by using this page (https://cdec.water.ca.gov/reportapp/javareports?name=RES) to determine which reservoirs to include and for some reason Almanor isnt on the list. Units are in kaf, thousands of acre feet. So many facets beautifully chartered. Northern California's reservoir levels continued to rise in the week after an atmospheric river slammed the state with torrential rain and high winds. The citys water system also includes a water bank at Don Pedro Reservoir along the Tuolumne River, which was full as of Feb. 1. Data and Tools She is also an alumna of Reveal from the Center for Investigative Reporting Investigative Fellowship and The New York Times Student Journalism Institute. The commission plans to decide Nov. 23 whether to formally ask customers to conserve water. Awesome work!! Lock Your email address will not be published. The water travels through a series of pipelines before it reaches the Bay Area and blends with five local reservoirs. But I would never have imagined how to put all the important information into a single plot. 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. United States. Nice! Also a little nit. Twenty of San thanks. For perspective, water demand across the SFPUC's service area of 2.7 million people was about 205,000 acre-feet last fiscal year. It has no natural inflow or out flow. Ive added it to my bookmarks for quick reference. California Reservoir Levels - Dashboard and visualization showing current water levels in California reservoirs . . 7 days 30 days This other page: https . Official websites use .gov Water data back to 1956 are available online. As of 5pm on 1/18, the data appears correct (~58k acre feet), but an hour ago it was reading off the chart (3X above what they are allowed to store right now). the city wastes water, so it was a moot issue. With modest additional investments San Francisco will be able to maintain an uninterrupted supply of high quality Tuolumne River water. Copyright Barry Rokeach, 2014. Sometimes this is well done sometimes it is poorly done. dam and restoring the valley. reserved. 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. Is that from melting snow and rain water coming from the mountains and filling it up? globe = document.getElementById('mekko'); function resizeframe(){ Add a button to convert the row heights to log scale. "This was rare for October. In 2021, the SFPUC and the Modesto and Turlock Irrigation Districts launched a proactive pilot program with the U.S. Click here for the SFPUC's 2020State of the Regional Water System Report. All Rights Reserved. For most of the year it will still be possible to divert the flow of the Tuolumne River into the pipeline just downstream of the National Park boundary. Restore Hetch Hetchy supports a power replacement plan that is truly renewable, and will not increase emissions of any pollutants or carbon that causes global warming.
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