Folsom is like an overflow tank. If you look at the inflow data on the major reservoirs, its pretty flat. SFPUC said as of this week, the Hetch Hetchy reservoir is at 92 percent capacity. I think the problem is with the CDEC database (as the LakesOnline website also has had incorrectly high information). ", The difference in soil type in the two watersheds was likely another factor. drained by the Tuolumne A question: the Historical Avg*, is it the value of year-today or natural year? reservoir violates the California Constitution specifically the Tracy Barbutes, Freelance / Special to The Chronicle, Heres where California reservoir levels stand after this weeks rains. In 2016, a Tuolumne County Superior Court judge dismissed the "In contrast, the Shasta Lake drainage had only a couple of stations in excess of 10 inches whereas most received less. YTD values are from January 1 . To reach Hetch Hetchy, you have to exit Yosemite National Park and re-enter it. . Ive added it to my bookmarks for quick reference. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. The trail includes spectacular views of Tueeulala and Wapama Falls. The water transmission system in the Bay Area and Peninsula includes the Bay Division, San Andreas, Sunset Supply, and Crystal Springs pipelines. The valley is Charts from the California Department of Water Resources show conditions at key state reservoirs on Oct. 22 (left) and on Nov. 2 (right). Units are in kaf, thousands of acre feet. I dont know if weve seen anything like this in October before.". Your email address will not be published. Amy Graff is the news editor for SFGATE. 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. Hetch Hetchy is the only reservoir above its average storage of 63%, and is 82% full. Required fields are marked *. This was helpful to project seasonal trends & storm impacts. Python is used to extract the data from this page hourly and wrangle the data in to a clean format. Thanks. Is that from melting snow and rain water coming from the mountains and filling it up? . This local water is captured in reservoirs located in San Mateo and Alameda counties. Hours: Year-round, but only accessible by car when the Hetch Hetchy Road is open. Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. The soaking was welcome in a drought-plagued state with a diminishing water supply. Draining Hetch Hetchy without depriving Bay Area residents of With modest additional investments San Francisco will be able to maintain an uninterrupted supply of high quality Tuolumne River water. Located in the northwest portion of Yosemite National Park, Hetch 2022 All Rights Reserved. Wonderful site. Similar findings are described in theUC Davis studyRe-Assembling Hetch HetchyandUS Bureau of Reclamation study. Trailhead coordinates: 37.946905, -119.787376 (37 56 48.85N 119 47 14.55W) Related articles . Water data back to 1956 are available online. Although Hetch Hetchy Reservoir is the most well-known, it stores less than 25% of the systems water. best to drain the valley. The maximum that the city has put away is 570,000 acre-feet of water. Commission. The gain came after weather gauges in the area recorded more than 5 inches from one storm. Only improvement I would suggest is an improvement of the display of the smaller reservoirs so the names are readable. }, 150); I notice Briones Reservoir is not on the list. 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. 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). Historical average is near unattainable these days. Californias largest water agencies, in both the urban and agricultural sectors, have invested in ambitious groundwater banking programs inKern County. 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. 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? A lock ( San Francisco's water-bank in Don Pedro Reservoir, downstream on the Tuolumne River, holds twice as much water as Hetch Hetchy. There doesnt seem to be any site that shows the impact of each storm. } resizeframe(); How can I apply to SFPUC? Thats just another very strong indication visually that its a big water year.. You can also use it to monitor only the reservoirs you are most interested in. https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=SHA Due to its high-altitude location at 3,900 feet above sea level But tearing down O'Shaughnessy Dam in order to restore Hetch Hetchy Valley would be a disaster. Constitution used to support the arguments to remove the dam was By a large measure, damming and flooding Hetch Hetchy is the most significant damage ever allowed in any of our national parks. the issue, including those under Franklin Delano Roosevelt, So on Jan 10 were at 82% of the average for Jan 10. currently, there is a lot more water coming in than going out. If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. However, I am interested in how much we are saving. draining the reservoir to court, arguing in 2015 that the James Q. Martin / Restore Hetch Hetchy Show More Show Less 4 of 7 I am grateful for all that you have done here to open our eyes to what is happening, what has happened, and even what might be on the horizon. 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. the Bay Area. It could be the 180% of historical average of snowpack, which will be melting in a couple months. 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. Click here for the SFPUC's 2020State of the Regional Water System Report. Next feature request: wire in aquifer level data! I would think with the rain it would get to historical average and then more outflow would happen. Saved to my favorites now. use must be reasonable.. 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. San Franciscos Hetch Hetchy water system is almost full for the first time in years. Copyright Barry Rokeach, 2014. Kurtis Alexander is an enterprise reporter for The San Francisco Chronicle, with a focus on natural resources and the environment. Love this. Hetch Hetchy water travels 160 miles via gravity from Yosemite to the San Francisco Bay Area. Meant this comment for the integrated snowpack and reservoir view. administration attempted to allocate funds to study removing the Thank you for a beautiful job. What happened to the Hetch Hetchy level? provides water to 2.7 million residents and businesses in the San There is something strange about the data over the last two days (Jan.17 to Jan. 19): 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 It certainly looks dry at least until the last week in February, he said. In 2021, the SFPUC and the Modesto and Turlock Irrigation Districts launched a proactive pilot program with the U.S. For example, Hetch Hetchy Reservoir in Yosemite National Park provides 85 percent of San Francisco's total water needs. Also, do they provide inflows and outflows for locations? over the past few days. 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. No it is correct. Nice! This website along with another shows that Eastmans level is still rising even though we have not had rain in more than a week. Even with the latest precipitation, Folsoms values was unchanged. A .gov website belongs to an official government organization in the Ive looked at reservoir sights for years. Previously, Kellie covered dining news and trends, visual arts, events and nightlife for the Arizona Republic, and freelanced for the former Contra Costa Times. Current as of October 03, 2022 | Updated by . Maybe just acre/ft with ^ or down arrow. Its supposed to be brown. Northern California's reservoir levels continued to rise in the week after an atmospheric river slammed the state with torrential rain and high winds. ) or https:// means youve safely connected to the .gov website. rejected by an appellate court and the California Supreme Court More about the Tuolumne River Voluntary Agreement can be found athttp://www.tuolumnerivermanagementplan.com. has a graph which shows how the historical avg changes throughout the year (oscillating between ~15000 and ~21000). System for more than 60 percent of their drinking water. Super frustrating. March 12 - The Perks of California Native Wildflowers, March 28 - Rainwater Harvesting and Rain Gardens, April 01 - Lawn Conversion to Native and Drought-Tolerant Plants. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. 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. 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. Ill pass it along to friends. 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. 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. Its water supply Hetch Hetchy Reservoir, in the Sierra Nevada is 80% full, . 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. 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. Really appreciate the work you did to build this graph. Thanks for the link. Thats a great suggestion and one that would be particularly helpful! Kudos to the designers. I love this this site too. For the first week of February, there was a slight increase for most reservoirs from January amounts. So they should be saving much more and deal with the .000001 of risk later. 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. 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. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. Why is Lake Nacimiento and Lake San Antonio not listed? Its currently listed on this page as 29kaf full, but the usgs.gov page below says Hetch Hetchy is at 299.7kaf full. It was the only tool that I could find that would allow me to make a vertical marimekko graph. 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. So its volume is counted as Orville inflow. LK ELEANOR NR HETCH HETCHY CA. There are no alerts at this time. She is a University of Washington graduate. This is the first state (of 6 I have lived in) that has had water police and restrictions. Hetch Hetchy is Monitoring location 11275500. Thank you for the time and effort in creating the graphs. The SFPUC has consistently stated that voluntary agreements are the best path forward for the Bay-Delta, as the voluntary agreement strikes the right balance between environmental stewardship and water reliability. Great URL. The amount stored is increasing, just not by a lot. For some strange unknown reason, they are not allowing the lake to fill up. Love easy to read and understand information. Best of luck out there in California! The adopted Plan addresses water quality issues affecting the ecosystem and fisheries of the Bay-Delta system. If you are on a mobile device you can tap the reservoir to get that same info. This is the best one out there. Awesome work!! 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. function resizeframe(){ Great graphs and very useful. 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. I realize there we dont want to reservoirs overflowing, but why are we still below historical average? Its fluctuating between ~107% and ~20% from one hour to the next (reading 107.6 atm). This would allow us to see important, but noise-level reservoirs like hetch hetchy. a broad meaning that had been previously applied in an . David Rizzardo, hydrology section manager for the California Department of Water Resources, said there are a lot of factors that affect reservoir storage. . In another sign that Californias drought is easing, San Francisco captured more than a years worth of water in just one months time. Secure .gov websites use HTTPS by the Raker Act. Monitoring location 11277200 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. Gavin Newsom asked all California residents to voluntarily reduce use by 15% compared with use in 2019. 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. 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. The dam and reservoir are the source for the Hetch Hetchy Aqueduct, which provides water for over . Your Privacy Choices (Opt Out of Sale/Targeted Ads). 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. located in a national park and it passed the Raker Act in 1913 to proposed as a source of water following the 1906 San Francisco How come the totals disagree with the cal map graphic? Ronald Reagan and George W. Bush. 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. 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. At this facility, which is shared with other water agencies, the city can stash water for credits against future draws on the river. What happened to the Hetch Hetchy level? City officials have touted their efforts to help salmon, for example by timing water releases to assist with migration and restoring breeding grounds. Lake Mendocino and Lake Berryessa water levels stayed the same. Curt, Good point re the colder weather dropping more snow instead of rain at higher elevations this year. The water is delivered by a gravity-based system and aqueduct to Thanks for taking the time to do that. 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. Hetch Hetchy Reservoir in Yosemite National Park is seen in 2022. pertained to water that was wasted, and there was no claim that The Hetch Hetchy Reservoir in Yosemite delivers water to 2.6 million Bay Area residents every day. Remember, much of the state is still in a drought and so the prudence is warranted.. The overall storage is said to have dropped by 57.4 to 56.4 (or 302 kaf). Take CA Highway 120 from the park toward Groveland. a minimum, according to the San Francisco Public Utilities Even with all the rain and floods, still a long way to fill them to capacity. 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. I find myself coming back to this every few days to check on our water . and its snowmelt-fed water supply, water from Hetch Hetchy Our drinking water comes from a variety of protected sources carefully managed by the SFPUC. Steve Ritchie, the San Francisco Public Utilities Commission's assistant general manager for water, said the additional water amounted to roughly 11% of the reservoir's total capacity. 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. Just in case a large storm hits, that way they dont reach 100% capacity. 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. 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. Different presidential administrations also have tried to address The Hetch Hetchy Valley today with the dam seen in the lower right. 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. diversion of water? Restore Hetch Hetchy claimed the phrase had This other page: https . Hetch Hetchy water travels 160 miles via gravity from Yosemite to the San Francisco Bay Area. 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). I havent spent much time looking at it but that data is on the CDEC website. Call 209-372-0200 for the latest road and weather conditions, Hetch Hetchy Road Daily Hours: 8 am to 5 pm 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 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. Restore Hetch Hetchy. Very nice work. This is a marimekko (or mekko) graph which may take some time to understand if you arent used to seeing them. Another not monitored by the State? The extensive amount of storage, which is designed to benefit the Bay Area as droughts become more severe with climate change, has become a sticking point in a longstanding environmental battle over how much water the city should be taking from rivers. I do not see Diamond Valley Lake Resevoir on this page. Hetch Hetchy is only one of nine reservoirs in the San Francisco Public Utility Commissions water system. It seems likely one of those two readings is wrong. Fish and Wildlife Service that provides an immediate $4 million investment for habitat improvements for fisheries in the Tuolumne River. I live in the central valley. Privacy Policy | 2011-2021 San Francisco Public Utilities Commission. 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. How Fast Are California Reservoirs Filling Up? I see many of the local canals flowing with lots of water. Within San Francisco, we manage water distribution in the City. Shasta is the reservoir with the largest capacity and so it is the tallest row. 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. Email: [email protected], [email protected] Twitter: @KellieHwang, @yoohyun_jung. 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.. Quite an eye opener. I would like to make one small suggestion:. I like the comparisons of last year, and the historical average. Its important to note that other communities in California have taken actions in far greater magnitude than SF to make our waterways more sustainable. I appreciate the information you are providing. It updates hourly using data from the California Department of Water Resources (DWR) website, giving an up-to-date picture of California reservoir levels. Hetch Hetchy is only one of nine reservoirs in the San Francisco Public Utility Commission's water system. Climbers Timmy O'Neill (left) and Lucho Rivera atop a wall overlooking Hetch Hetchy Reservoir. Jeff, the average changes daily as well. 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? Could you also show each reservoirs level as a function of time? earthquake. 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. Having it here would be great! 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. Together, the BAWSCA agencies account for two-thirds of water consumption from the system and pay for two-thirds of its upkeep. 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 commission plans to decide Nov. 23 whether to formally ask customers to conserve water. Park visitors walk across OShaughnessy Dam in Yosemite National Park on Sept. 1. The citys water system also includes a water bank at Don Pedro Reservoir along the Tuolumne River, which was full as of Feb. 1. window.addEventListener("orientationchange", function() { During most years, there will be a 30-day shut down of the Hetch Hetchy source in the winter months. A .gov website belongs to an official government organization in the Prior to The Chronicle, she worked as a data journalist for Honolulu Civil Beat, a watchdog news organization covering the Hawaiian islands. This local water is captured in reservoirs located in San Mateo and Alameda counties. GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System. One acre-foot is the equivalent of one acre of land covered in one foot of water. 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. It didnt end the drought, but it was definitely really good," said Ritchie. Why is it not listed? . }, false); Lake Tahoe really isnt part of California water, as the outflow goes to Nevada. 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. Lock 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. environmental context. Locked padlock United States. https://engaging-data.com/ca-reservoir-level/ The construction of the Hetch Hetchy Railroad took place from 1915 to 1918. 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 data on water storage comes from the California Department of Water Resources (DWR) Data Exchange Center. Hetch Hetchy Reservoir in Yosemite was 69 percent full on Tuesday, 150 percent of normal for this time of year.
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