A 1 week change would be interesting to show on each. 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. Remember, much of the state is still in a drought and so the prudence is warranted.. I see many of the local canals flowing with lots of water. David Rizzardo, hydrology section manager for the California Department of Water Resources, said there are a lot of factors that affect reservoir storage. California Reservoir Levels - Dashboard and visualization showing current water levels in California reservoirs . 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. use must be reasonable.. 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. I had a class in spillway design many years ago. Locked padlock Im curious: Lk Almanor is the 8th largest reservoir in CA. Here's what that means. a broad meaning that had been previously applied in an http://www.tuolumnerivermanagementplan.com. Is it because the laws have changed on how much each reservoir can hold or is it in anticipation of significantly more rain? I havent spent much time looking at it but that data is on the CDEC website. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. For some strange unknown reason, they are not allowing the lake to fill up. Rizzardo said there was a decent amount of flow into the reservoirs into January, even though weather-wise it was bone dry, a result of lower elevation snow at 4,000 to 6,000 feet making its way into the reservoirs. 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? Reservoir behind OShaughnessy Dam does not require filtration. Curious why Shasta lake seems to be making big gains in water coming in and Trinity not so much? The Bay Area transmission system also includes Irvington Tunnel 1 and Tunnel 2, the Bay Tunnel, and the Crystal Springs Bypass Tunnel. While the long-term voluntary agreement work continues, the SFPUC does not want to wait to restore the Tuolumne Rivers ecosystem. A different story is unfolding at Hetch Hetchy reservoir in Yosemite National Park, where water is being released to conserve and restore wildlife. YTD values are from January 1 . Didnt realize how bad things were there. Updated to include drought zones while tracking water shortage status of your area, plus reservoir levels and a list of restrictions for the Bay Areas largest water districts. https://waterdata.usgs.gov/monitoring-location/11275500/#parameterCode=00054&period=P7D. Are they releasing water to relieve the pressure in anticipation of more water? Thinking more about it. Lake Shasta, the state's largest reservoir, rose 2.9 feet and added 31,020 acre-feet of water. Even with all the rain and floods, still a long way to fill them to capacity. 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. How do I pay my bill? Together, the BAWSCA agencies account for two-thirds of water consumption from the system and pay for two-thirds of its upkeep. . San Franciscos Hetch Hetchy water system is almost full for the first time in years. Restoring Hetch Hetchy will require some changes in how San Francisco moves and stores water. not passed until 1928 five years after the dam was built. Your email address will not be published. Fish and Wildlife Service that provides an immediate $4 million investment for habitat improvements for fisheries in the Tuolumne River. } 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. All rights River. The gain came after weather gauges in the area recorded more than 5 inches from one storm. You can email her at agraff@sfgate.com. These graphs will always read low because they represent the percentage of the seasonal average at some point before the end of the season. The captured water is piped 150 miles to the Bay Area. Water data back to 1930 are available online. 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. In the year prior to Oroville reaching capacity the interactive chart showed the rate of inflow over time. The average for this time of year is approximately 4,659.57ft, plus or minus 39ft. The trail includes spectacular views of Tueeulala and Wapama Falls. Hetch Hetchy Regional Water System, which serves San Francisco, the Hetch Hetchy Valley to its natural state. This dashboard provides a bit more detail on the state of each of the reservoirs while also showing an aggregate total. Arg. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. To reach Hetch Hetchy, you have to exit Yosemite National Park and re-enter it. They are releasing water into the canals. Diamond Valley Lake is a man-made storage reservoir for storing imported water only. Is the Stanley Quencher tumbler worth its TikTok hype? "This was rare for October. The valley is Official websites use .gov There is something strange about the data over the last two days (Jan.17 to Jan. 19): Although Hetch Hetchy Reservoir is the most well-known, it stores less than 25% of the systems water. This other page: https . Having it here would be great! Draining Hetch Hetchy without depriving Bay Area residents of Have you looked into that side of the water management equation? 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.. Thanks for taking the time to do that. I wonder why it doesnt work for you. 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. The trail takes you to the base of Wapama Falls, passing two smaller waterfalls (during spring) on the way. Especially for small ones it is hard to identify them and click on them. Over the summer, Gov. Nate, thanks for the insight. https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=SHA Therefore flood control agencies take the more conservative route and order the release of water. Forty-six percent . Emissions must be offset by dedicated conservation programs or renewable energy generation such as wind or solar. Also, do they provide inflows and outflows for locations? DWR is one of many local, State and Federal entities that dictate water releases. has a graph which shows how the historical avg changes throughout the year (oscillating between ~15000 and ~21000). 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). Shasta is very large and could hold about 3.5 cubic kilometers of water at full (but not flood) capacity. 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. Ive looked at reservoir sights for years. Yes, and why is Twitchell Dam also not listed? 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In 2016, a Tuolumne County Superior Court judge dismissed the required on whether to demolish OShaughnessy Dam. I dont think its currently above the historical average, not below 1 year ago. Reservoir levels rising. Lots of possibilities, just curious. Thank you for a beautiful job. Flood control agencies (not DWR) have the most say in regard to releases. I hear from the farmers that we waste 80% of the water by flushing it into the ocean. I also hear the environmentalists say, the streams and wildlife need water, so flush it into the ocean. Its an interesting dilemma. That puts it at 84 percent of where it would usually be usually at this time of year. 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 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). Curt, Good point re the colder weather dropping more snow instead of rain at higher elevations this year. SFPUC said as of this week, the Hetch Hetchy reservoir is at 92 percent capacity. function reloadiframes(){ Ronald Reagan and George W. Bush. 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. LK ELEANOR NR HETCH HETCHY CA. Kellie Hwang is the newsletter editor for The San Francisco Chronicle. https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=HTH reserved. Theyve also seen drought surcharges on their water bills. Navigation and Navigable Waters 33.208.82 Hetch Hetchy, Cherry Valley, and Don Pedro Dams and Reservoirs. 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. While it may seem that Decembers production could get us through the rest of the season, Rizzardo explains that in hydrology, you need consistent water shed to keep soils happy. He fears that without more precipitation this season, well enter our third very dry year. Water storage facilities include watersheds, dams, and reservoirs including: Calaveras, San Antonio, Crystal Springs, Pilarcitos, and San Andreas. finding an alternative water and power source (Hetchy Hetchy also I realize there we dont want to reservoirs overflowing, but why are we still below historical average? 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. . One acre-foot is the equivalent of one acre of land covered in one foot of water. One gauge in the area has measured 6.12 inches since Oct. 1, which is 899% of normal. Only modest new supplies would be required in the driest years. The Hetch Hetchy Valley today with the dam seen in the lower right. Thats a great suggestion and one that would be particularly helpful! Hetch Hetchy Reservoir in Yosemite was 69 percent full on Tuesday, 150 percent of normal for this time of year. pertained to water that was wasted, and there was no claim that Its fluctuating between ~107% and ~20% from one hour to the next (reading 107.6 atm). Add a button to convert the row heights to log scale. What period does CA use for Historical Average? It will be very different depending on the period chosen. The SFPUC hoards water in dry years when they dont need to, said Peter Drekmeier, policy director at the conservation group Tuolumne River Trust. Within San Francisco, we manage water distribution in the City. This is a marimekko (or mekko) graph which may take some time to understand if you arent used to seeing them. As it is, at first glance, it looks like shasta is at the top because its 28000 instead of 4552. very nice product overall. If you are reading this, its probably the winter rainy season in California again, and time to check on the status of the water in the California reservoirs. Wapama Falls (moderate) 5 mi (8 km) round-trip; 2 hours. 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. Thats a very poor design. Hi Keith, you could de-select the large reservoirs from the menu at the top right. Water data back to 1956 are available online. Ill pass it along to friends. The Hetch Hetchy Reservoir in Yosemite delivers water to 2.6 million Bay Area residents every day. For the higher elevations, more of their water comes directly from snowmelt. 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. Major snowstorm might leave you stranded, New 101 express lanes opens in Bay Area. Delivery rates are 7-day average values. This is wonderful information. Folsom is like an overflow tank. I will take a look and see if there are other important reservoirs missing and may add them in the future. ) or https:// means youve safely connected to the .gov website. globe.height = globe.contentWindow.document.body.scrollHeight+40+"px"; John Muir and the Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NAVD 1988, LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929, and RESERVOIR STORAGE are available. 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. Great resource! https://engaging-data.com/ca-reservoir-level/ The group says the recent plethora of water shows that the city could do without Hetch Hetchy Reservoir, by using other storage facilities that have filled and pursuing new projects to capture the surplus. Much of the recent inflow was to Hetch Hetchy, which can hold. The Water Education Foundation is a nonprofit, tax-exempt, This is a very clear graph and I cannot imagine the hours you have put in while setting it up and doing the maintenance. 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. mobilewarn(); I am new to the state. The half-hour drive to Hetch Hetchy from CA Highway 120 begins outside the park boundaries. Meanwhile, the group Restore Hetch Hetchy is urging the SFPUC to abandon Hetch Hetchy Reservoir. Park visitors walk across OShaughnessy Dam in Yosemite National Park on Sept. 1. Monitoring location 11277500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. 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. 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. Python is used to extract the data from this page hourly and wrangle the data in to a clean format. "In contrast, the Shasta Lake drainage had only a couple of stations in excess of 10 inches whereas most received less. 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. 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. Privacy Policy | 2011-2021 San Francisco Public Utilities Commission. At this facility, which is shared with other water agencies, the city can stash water for credits against future draws on the river. She is a University of Washington graduate. Its supposed to be brown. A wet December produced ample snowfall, which is still sitting at high elevations. This other page: California drought: Charts show where reservoir levels stand after a dry January, Track water shortages and restrictions across Bay Area. 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? 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. 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. My guess would be that the recent systems have been cold and so they are predominantly dropping snow on the watershed. 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. What happened to the Hetch Hetchy level? Major snowstorm might leave you stranded, New 101 express lanes opens in Bay Area. This is the first state (of 6 I have lived in) that has had water police and restrictions. How do I contact support? A truly excellent project. This file photo shows Shasta Lake. We provide water directly to customers in San Francisco and wholesale through 26 Water agencies in Alameda, Santa Clara, and San Mateo counties. ", The difference in soil type in the two watersheds was likely another factor. Maintaining this variety of sources is an important component of our near and long-term water supply management strategy. I appreciate the information you are providing. 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. Located in the northwest portion of Yosemite National Park, Hetch document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Subscribe to receive email notifications of new content. 7 days 30 days Thanks for the link. Sometimes this is well done sometimes it is poorly done. Locked padlock earthquake. May 24, 2022 - BAWSCA Statement About the Adoption of a Systemwide Water Use Reduction of 11%. 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. Usually with warm ARs, you get a dramatic increase in inflow, which can fill even very large reservoirs relatively quickly, like Oroville in 2017. San Francisco operates three medium-sized hydro-electric power plants in the Tuolumne River watershed Kirkwood, Moccasin, and Holm. This hike follows the shoreline of the reservoir with moderate up and downhill hiking. If you look at this chart for Hetch Hetchy, you can see that the biggest and steadiest rise is between March and July, https://waterdata.usgs.gov/monitoring-location/11275500/#parameterCode=00054&period=P365D&compare=true. 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. Good info to know. I dont know if weve seen anything like this in October before.". 2151 River Plaza Drive, Suite 205 Department of Water Resources is just another in a long line of completely mismanaged California entities. Saved to my favorites now. Last week, I paid a visit to Hetch Hetchy. This would allow us to see important, but noise-level reservoirs like hetch hetchy. This website along with another shows that Eastmans level is still rising even though we have not had rain in more than a week. In another sign that Californias drought is easing, San Francisco captured more than a years worth of water in just one months time. Sierra Club unsuccessfully fought the reservoirs establishment Call 209-372-0200 for the latest road and weather conditions, Hetch Hetchy Road Daily Hours: 8 am to 5 pm A separate vote would have been By a large measure, damming and flooding Hetch Hetchy is the most significant damage ever allowed in any of our national parks. This was helpful to project seasonal trends & storm impacts. 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. Maybe bad data. An official website of the United States government. Ive added it to my bookmarks for quick reference. It does not meet the California definition of renewable energy. HETCH HETCHY RES A HETCH HETCHY CA. Required fields are marked *. An improvement: Could you include a bar for Last year at this date? The data on water storage comes from the California Department of Water Resources (DWR) Data Exchange Center. This local water is captured in reservoirs located in San Mateo and Alameda counties. Interesting. At times, nearly 90% of the flow of the Tuolumne River is piped off by the SFPUC and other water agencies in the region. With modest additional investments San Francisco will be able to maintain an uninterrupted supply of high quality Tuolumne River water. At the moment, I am not interested in the debate. 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? It used to be full (and beyond). She joined the Chronicle as a data reporter in 2021. Lake Oroville. During the winter months, they let water out of the reservoirs in anticipation of large storms. 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. "Soils that have become hydrophobic due to wildfire can also contribute to increased runoff because the water is less able to penetrate the burned soil," the department said. The BAWSCA agencies are therefore key stakeholders in ensuring the system serves as a reliable source of high quality water. So my question is, How do we know if we are saving the water for later release (late summer) or are we releasing it to the ocean? I live close to Eastman Lake. But they'll cost you, Fight at high school basketball game in S.F. 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. their water supply would cost hundreds of millions of dollars at The OShaughnessy Dam i s 300 feet tall only medium-sized by todays standards. Current as of October 03, 2022 | Updated by . Take CA Highway 120 from the park toward Groveland. While the rainfall has been bad for many people, I am happy to see Californias reservoirs are benefiting slightly, Amen! resizeframe(); Restore Hetch Hetchys subsequent appeal to the ruling was Trailhead address: Evergreen Road (Hetch Hetchy Road), Yosemite National Park, CA 95321. It seems likely one of those two readings is wrong. Email: kalexander@sfchronicle.com Twitter: @kurtisalexander. 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. Hours: Year-round, but only accessible by car when the Hetch Hetchy Road is open. Water is rapidly flowing into the state's reservoirs. best to drain the valley. This chart only shows reservoirs filled via natural flow/rainfall. There doesnt seem to be any site that shows the impact of each storm. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. So on Jan 10 were at 82% of the average for Jan 10. Visualization was done in javascript and specifically the D3.js visualization library. 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.
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