For detailed analysis of how San Franciscos water system will operate without Hetch Hetchy reservoir, see the Environmental Defense Funds studiesParadise RegainedandCherry Intertie Alternative. Is that from melting snow and rain water coming from the mountains and filling it up? the Bay Area. Here's what that means. 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. Remaining Capacity text in the legend should be brown? 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 find the charts below from the California Department of Water Resources website. Secure .gov websites use HTTPS The BAWSCA agencies are therefore key stakeholders in ensuring the system serves as a reliable source of high quality water. Occasionally the source water will shift to local reservoirs during routine maintenance to the conveyance system. 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, Going to Tahoe this weekend? San Francisco maintained the phrase only Most local reservoir inflow timeseries are too short to calculate long-term values. Owned by the city of San Francisco, Hetch Hetchy Reservoir Crystal Springs Reservoir, along Highway 280 in San Mateo County, was 89 percent . Gavin Newsom asked all California residents to voluntarily reduce use by 15% compared with use in 2019. I had a class in spillway design many years ago. It certainly looks dry at least until the last week in February, he said. } Hetch Hetchy is Monitoring location 11275500. 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. Great Job on this site! Before returning to the Bay Area, she held roles as transportation reporter and trending news reporter at the IndyStar in Indianapolis. Read more about the data team and their work. https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=HTH A wet December produced ample snowfall, which is still sitting at high elevations. Diamond Valley Lake is a man-made storage reservoir for storing imported water only. 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. Theyve also seen drought surcharges on their water bills. Californias largest water agencies, in both the urban and agricultural sectors, have invested in ambitious groundwater banking programs inKern County. This other page: https . ) or https:// means youve safely connected to the .gov website. . 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 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 OShaughnessy Dam, which was completed in 1938 and is 430-feet tall, impounds water in Hetch Hetchy Reservoir for communities in the Bay Area. 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. Im curious: Lk Almanor is the 8th largest reservoir in CA. That puts it at 84 percent of where it would usually be usually at this time of year. The average for this time of year is approximately 4,659.57ft, plus or minus 39ft. Together, the BAWSCA agencies account for two-thirds of water consumption from the system and pay for two-thirds of its upkeep. Take CA Highway 120 from the park toward Groveland. I like the comparisons of last year, and the historical average. "It is unknown how much area of the Feather River and Shasta Lake drainages are impacted by hydrophobic soils.". The blue line indicates the reservoirs water level one year ago today. Shasta, Oroville, Hetch Hetchy and many others were built by damming large rivers. It can take several days to see the full impact on reservoirs as water continues to run through watersheds and into streams in the days after a storm. The worst possible scenario is it just remains completely dry. thanks. document.getElementById('globes').contentWindow.location.reload(); 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. Ive been meaning to search for aquifer levels. Interesting. Its supposed to be brown. I will take a look and see if there are other important reservoirs missing and may add them in the future. I noticed that Folsom does not change whereas every reservoir changes on an hourly update. In another sign that Californias drought is easing, San Francisco captured more than a years worth of water in just one months time. United States. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. Francisco Bay Area. Assistant General Manager for Water Steven Ritchie credits the way the system is managed along with lower. Email: kalexander@sfchronicle.com Twitter: @kurtisalexander. finding an alternative water and power source (Hetchy Hetchy also The upcountry portion of the System begins with Hetch Hetchy Reservoir in Yosemite National Park. Save my name, email, and website in this browser for the next time I comment. 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. Its great seeing all the reservoirs in California at or near historical averages. Ill pass it along to friends. There are many very small reservoirs (relative to Shasta) so the bars will be very thin to the point where they are barely a sliver or may not even show up. Thanks for the link. Ronald Reagan and George W. Bush. The Bay Area's main reservoir is up 21 feet. 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. Is it because the laws have changed on how much each reservoir can hold or is it in anticipation of significantly more rain? 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. This dashboard is great! One of the big challenges in water management is controling the release. Prior to The Chronicle, she worked as a data journalist for Honolulu Civil Beat, a watchdog news organization covering the Hawaiian islands. And more work is underway. Nate, thanks for the insight. located in a national park and it passed the Raker Act in 1913 to Hours: Year-round, but only accessible by car when the Hetch Hetchy Road is open. California Reservoir Levels - Dashboard and visualization showing current water levels in California reservoirs . The reservoir is now projected to cost $4.4 billion, with Prop. looks like the CDEC website is the cause of the issue unless it actually dropped 90% in a day: If you look at the inflow data on the major reservoirs, its pretty flat. Thank you so much for the hard work! Stay up-to-date with breaking news and upcoming events. How Fast Are California Reservoirs Filling Up? }, false); Lake Tahoe really isnt part of California water, as the outflow goes to Nevada. 2022 All Rights Reserved. SFPUC said as of this week, the Hetch Hetchy reservoir is at 92 percent capacity. 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. Current and Historical Visualization, https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=HTH, https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=SHA, https://engaging-data.com/ca-reservoir-level/, https://cdec.water.ca.gov/reportapp/javareports?name=RES, Visualizing Californias Water Storage Reservoirs and Snowpack, Interactive California Reservoir Levels Dashboard. May 24, 2022 - BAWSCA Statement About the Adoption of a Systemwide Water Use Reduction of 11%. Monitoring location 11277500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. 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). I wonder why it doesnt work for you. Lake Shasta, the state's largest reservoir, rose 2.9 feet and added 31,020 acre-feet of water. In whats known as the Bay-Delta Plan, state water regulators are amid a years-long effort to negotiate a policy for how much water should be kept in rivers that flow to the Sacramento-San Joaquin River Delta to meet the needs of both people and wildlife. Great visualization Chris! Your email address will not be published. Over the summer, Gov. 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. 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. Should be fixed at some point. In 2021, the SFPUC and the Modesto and Turlock Irrigation Districts launched a proactive pilot program with the U.S. 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. Instructions: However, I am interested in how much we are saving. 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. Kellie Hwang is the newsletter editor for The San Francisco Chronicle. I dont know if weve seen anything like this in October before.". 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. I realize there we dont want to reservoirs overflowing, but why are we still below historical average? 501(c)3 organization, federal tax ID #942419885. 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. It used to be full (and beyond). But the growing water reserves dont please everyone. At times, nearly 90% of the flow of the Tuolumne River is piped off by the SFPUC and other water agencies in the region. If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. I would like to make one small suggestion:. Thinking more about it. Kudos to the designers. 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. No it is correct. For example, the average storage level for Feb. 7 is usually 65% of capacity for Trinity Dam, but currently its at 31%. 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? Thats a great suggestion and one that would be particularly helpful! She joined the Chronicle as a data reporter in 2021. currently, there is a lot more water coming in than going out. 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. 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? Saved to my favorites now. An official website of the United States government. Trinity Lake, with a capacity of 2,447,650 acre-feet, had the smallest increase, from 29% in December to 30% in January. Click here for the SFPUC's 2020State of the Regional Water System Report. Voters rejected a 2012 His recent work has examined the impacts of drought, threats to public lands and wildlife, and the nation's widening rural-urban divide. 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. 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. 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. The regional water system provides water to 2.4 million people in San Francisco, Santa Clara, Alameda and San Mateo counties. Hetch Hetchy is only one of nine reservoirs in the San Francisco Public Utility Commissions water system. https://waterdata.usgs.gov/monitoring-location/11275500/#parameterCode=00054&period=P7D. This dashboard provides a bit more detail on the state of each of the reservoirs while also showing an aggregate total. Great URL. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Subscribe to receive email notifications of new content. From the main road, it's about a 20- to 25-minute drive to the parking area. For some strange unknown reason, they are not allowing the lake to fill up. So on Jan 10 were at 82% of the average for Jan 10. GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System. They placed a few dissipators just before the river. Hetch Hetchy water travels 160 miles via gravity from Yosemite to the San Francisco Bay Area. The Hetch Hetchy Valley today with the dam seen in the lower right. Locked padlock Data have been checked by the reporting agency. The commission plans to decide Nov. 23 whether to formally ask customers to conserve water. They are releasing water into the canals. 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. Thanks for providing it for public information. This local water is captured in reservoirs located in San Mateo and Alameda counties. Located in the northwest portion of Yosemite National Park, Hetch . There doesnt seem to be any site that shows the impact of each storm. Twenty of San Your tools are awesome just hurts when you receive bad data at times! This is a very clear graph and I cannot imagine the hours you have put in while setting it up and doing the maintenance. Its not possible to see or really interact with the tiniest slivers. lawsuit, saying Restore Hetch Hetchys arguments were preempted 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. That cant be right. 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. provides water to 2.7 million residents and businesses in the San For perspective, water demand across the SFPUC's service area of 2.7 million people was about 205,000 acre-feet last fiscal year. 2013, photo, the Hetch Hetchy Reservoir is hazy with smoke . My guess would be that the recent systems have been cold and so they are predominantly dropping snow on the watershed. 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. A truly excellent project. The source water from SFPUC is typically from the Hetch Hetchy reservoir located in the Sierra Nevada Mountains. San Franciscos water system, which includes Hetchy Hetchy, is expected to fill this winter for the first time since 2019. 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. That said, most of its outflow makes its way down Feather River (via Rock Creek Reservoir) and ultimately into Orville. Just in case a large storm hits, that way they dont reach 100% capacity. setTimeout(function (){ For each of the top 8 reservoirs the storage has increased by a total of 217 kaf, however). Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. 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. So many facets beautifully chartered. earthquake. 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. Why is Lake Nacimiento and Lake San Antonio not listed? One gauge in the area has measured 6.12 inches since Oct. 1, which is 899% of normal. Required fields are marked *. Wonderful site. February 21, 2023 - BAWSCA Statement on State Water Resources Control Board'sSchedule for Consideration of a Voluntary Agreement for the Tuolumne River. 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. Kurtis Alexander is an enterprise reporter for The San Francisco Chronicle, with a focus on natural resources and the environment. This is also affected by most of these dams multi-purpose nature where they are near constantly releasing for power(like Shasta) or to make room for flood control capacity(like Folsom). In 2016, a Tuolumne County Superior Court judge dismissed the Therefore flood control agencies take the more conservative route and order the release of water. While the long-term voluntary agreement work continues, the SFPUC does not want to wait to restore the Tuolumne Rivers ecosystem. How come the totals disagree with the cal map graphic? And the current water storage amounts are well below the historical averages for this time of year. 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. in 2018. According to the San Francisco Public Utilities Commission, Hetch Hetchy Reservoir can store as much as 117 billion gallons for the Hetch Hetchy Regional Water System, which serves San Francisco, Santa Clara, Alameda and San Mateo counties. I recently joined the team with Restore Hetch Hetchy as Engagement & Development Director. Ive looked at reservoir sights for years. Only improvement I would suggest is an improvement of the display of the smaller reservoirs so the names are readable. The reservoir is eight miles long and the largest single body of water in Yosemite. I would think with the rain it would get to historical average and then more outflow would happen. Official websites use .gov Sierra Club unsuccessfully fought the reservoirs establishment LK ELEANOR NR HETCH HETCHY CA. } The judge also noted the provision of the state Yep. 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 captured water is piped 150 miles to the Bay Area. 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. Python is used to extract the data from this page hourly and wrangle the data in to a clean format. 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. It is on the graph. since it required flooding a She is also an alumna of Reveal from the Center for Investigative Reporting Investigative Fellowship and The New York Times Student Journalism Institute. If you click on the list button in the top right of the dashboard, it will show a list of the reservoirs (in order of size from largest to smallest) and you can check which ones you would like to display.
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