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One of the big challenges in water management is controling the release. 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 . 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.. Even with the latest precipitation, Folsoms values was unchanged. 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. 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. Monitoring location 11277500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. Absolutely zero reason to be releasing this much water from these reservoirs. If you are on a computer, you can hover your cursor over a reservoir and the dashboard at the top will provide information about that individual reservoir. How Fast Are California Reservoirs Filling Up? Thats just another very strong indication visually that its a big water year.. diversion of water? Restore Hetch Hetchy claimed the phrase had The Bay Area transmission system also includes Irvington Tunnel 1 and Tunnel 2, the Bay Tunnel, and the Crystal Springs Bypass Tunnel. 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. 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. lawsuit, saying Restore Hetch Hetchys arguments were preempted Together, the BAWSCA agencies account for two-thirds of water consumption from the system and pay for two-thirds of its upkeep.
Only modest new supplies would be required in the driest years. has a graph which shows how the historical avg changes throughout the year (oscillating between ~15000 and ~21000). There is something strange about the data over the last two days (Jan.17 to Jan. 19): Yoohyun Jung is the Deputy Data Editor for The San Francisco Chronicle. 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. Ive added it to my bookmarks for quick reference. Reservoir levels rising. 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. Hetch Hetchy is one of nine reserviors in a water system that serves San Francisco and other Bay Area communities. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. The average for this time of year is approximately 4,659.57ft, plus or minus 39ft. DWR is one of many local, State and Federal entities that dictate water releases. So included in DWR #S. 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. Similar findings are described in theUC Davis studyRe-Assembling Hetch HetchyandUS Bureau of Reclamation study. scenic mountain valley in a national park. San Francisco operates three medium-sized hydro-electric power plants in the Tuolumne River watershed Kirkwood, Moccasin, and Holm. Lake Shasta, the state's largest reservoir, rose 2.9 feet and added 31,020 acre-feet of water. Hetch Hetchy Reservoir in Yosemite National Park is seen in 2022. It would be really interesting to visualize whether were able to replenish ground water this year after all the precipitation. The valley is Different presidential administrations also have tried to address Kellie Hwang is the newsletter editor for The San Francisco Chronicle. Thank you! 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. Water is such a fascinating topic and Id hate to have to be a water manager making a decision on how much to release to avoid reservoir flooding. Also a little nit. With modest additional investments San Francisco will be able to maintain an uninterrupted supply of high quality Tuolumne River water. You can also use it to monitor only the reservoirs you are most interested in. California reservoir levels: . . After the reservoirs Restore Hetch Hetchy. Really appreciate the work you did to build this graph. They are releasing water into the canals. 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. Trailhead address: Evergreen Road (Hetch Hetchy Road), Yosemite National Park, CA 95321. Due to its high-altitude location at 3,900 feet above sea level This file photo shows Shasta Lake. Stay up-to-date with breaking news and upcoming events. rejected by an appellate court and the California Supreme Court Thank you for the time and effort in creating the graphs. Spring snowmelt runs down the Tuolumne River and fills Hetch Hetchy, the largest reservoir in our water system. 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. Python is used to extract the data from this page hourly and wrangle the data in to a clean format. Call 209-372-0200 for the latest road and weather conditions, Hetch Hetchy Road Daily Hours: 8 am to 5 pm As it is, at first glance, it looks like shasta is at the top because its 28000 instead of 4552. very nice product overall. Crystal Springs Reservoir, along Highway 280 in San Mateo County, was 89 percent . San Francisco voters have demonstrated their opposition to Californias snowpack slips below average after dismally dry January, renewing concerns about drought, Busting water limits wont cost you in Marin County: Penalties canceled as rain fills reservoirs, California snowpack hits highest level this century for March. 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. The gain came after weather gauges in the area recorded more than 5 inches from one storm. It was the only tool that I could find that would allow me to make a vertical marimekko graph. You dont see runoff right away, the snow is still up there, frozen, doing what we want it to do, he said. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. 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. Shasta is very large and could hold about 3.5 cubic kilometers of water at full (but not flood) capacity. dam and restoring the valley. After record snowfall in December was followed by a dry January, there are renewed concerns of drought. 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. February 21, 2023 - BAWSCA Statement on State Water Resources Control Board'sSchedule for Consideration of a Voluntary Agreement for the Tuolumne River. 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). Water data back to 1956 are available online. Northern California's reservoir levels continued to rise in the week after an atmospheric river slammed the state with torrential rain and high winds. Your tools are awesome just hurts when you receive bad data at times! I realize there we dont want to reservoirs overflowing, but why are we still below historical average? During the winter months, they let water out of the reservoirs in anticipation of large storms. But I would never have imagined how to put all the important information into a single plot. construction in the 1920s, various groups have lobbied to restore All rights reserved. This local water is captured in reservoirs located in San Mateo and Alameda counties. Thanks. 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. Hetchy Reservoir can store as much as 117 billion gallons for the 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. . One acre-foot is the equivalent of one acre of land covered in one foot of water. Thanks for taking the time to do that. 7 days 30 days Santa Clara, Alameda and San Mateo counties. use must be reasonable.. From the main road, it's about a 20- to 25-minute drive to the parking area. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. Hetch Hetchy Level before the storm: 3,729.68 feet Level after the storm: 3,750.99 feet Total rise: 21.31 feet Storage before the storm: 221,500 acre-feet Storage after the storm: 257,800. 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). Hetch Hetchy is the only reservoir above its average storage of 63%, and is 82% full. Locked padlock I notice Briones Reservoir is not on the list. Article X, Section 2 that requires diversions for all water Curious why Shasta lake seems to be making big gains in water coming in and Trinity not so much? The Hetch Hetchy Valley today with the dam seen in the lower right. You can email her at agraff@sfgate.com. Are they releasing water to relieve the pressure in anticipation of more water? This is a great and very thoughtfully designed web site! Department of Water Resources is just another in a long line of completely mismanaged California entities. The water transmission system in the Bay Area and Peninsula includes the Bay Division, San Andreas, Sunset Supply, and Crystal Springs pipelines. But they'll cost you, Fight at high school basketball game in S.F. According to the San Francisco Public Utilities Commission, Hetch Share sensitive information only on official, secure websites. 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. mobilewarn();
Have you looked into that side of the water management equation? "In contrast, the Shasta Lake drainage had only a couple of stations in excess of 10 inches whereas most received less. And early forecasts show the rest of the wet season is not likely to produce enough precipitation. Water data back to 1930 are available online. Usually with warm ARs, you get a dramatic increase in inflow, which can fill even very large reservoirs relatively quickly, like Oroville in 2017. I find myself coming back to this every few days to check on our water . Kudos to the designers. More about the Tuolumne River Voluntary Agreement can be found athttp://www.tuolumnerivermanagementplan.com. Visualization was done in javascript and specifically the D3.js visualization library. The reservoir is eight miles long and the largest single body of water in Yosemite. This dashboard provides a bit more detail on the state of each of the reservoirs while also showing an aggregate total. 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. Important Legacy real-time page. 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. For detailed analysis of how San Franciscos water system will operate without Hetch Hetchy reservoir, see the Environmental Defense Funds studiesParadise RegainedandCherry Intertie Alternative. Instructions: globe = document.getElementById('mekko');
These sources include surface water stored in reservoirs located in the Sierra Nevada, Alameda County and San Mateo County, and groundwater supplies stored in a deep aquifer located in San Francisco and San Mateo counties. Fish and Wildlife Service that provides an immediate $4 million investment for habitat improvements for fisheries in the Tuolumne River. As of Feb. 1, the systems total water storage was just over 1.3 million acre-feet, or about 92% of capacity. BAWSCA agencies also are implementing water conservation and water recycling projects to help preserve this precious resource for their communities, and are working to identify alternate sources of water supply. I was thinking that it would be interesting to compare inflows and outflows. https://engaging-data.com/ca-reservoir-level/ Lock Wapama Falls (moderate) 5 mi (8 km) round-trip; 2 hours. The dam and reservoir are the source for the Hetch Hetchy Aqueduct, which provides water for over . Navigation and Navigable Waters 33.208.82 Hetch Hetchy, Cherry Valley, and Don Pedro Dams and Reservoirs. A wet December produced ample snowfall, which is still sitting at high elevations. The Water Education Foundation is a nonprofit, tax-exempt, Part of the lake is on the California side, but it has zero California water impact beyond the immediate Tahoe residents. draining the reservoir to court, arguing in 2015 that the If you look at the inflow data on the major reservoirs, its pretty flat. }, false); Lake Tahoe really isnt part of California water, as the outflow goes to Nevada. At times, nearly 90% of the flow of the Tuolumne River is piped off by the SFPUC and other water agencies in the region. It is also the amount of water in a cube that is 352 feet per side (about the length of a football field). thanks. Then it has the appearance of something filling up, while still providing all the detail. "It was a very healthy shot in the arm. Yep. }
So its volume is counted as Orville inflow. Great stuff. function resizeframe(){
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. Copyright 2023Water Education Foundation. Its not possible to see or really interact with the tiniest slivers. Its supposed to be brown. Local reservoir inflows have negative daily flow rates set to zero. Current as of October 03, 2022 | Updated by . 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. Flood control agencies (not DWR) have the most say in regard to releases. Folsom is like an overflow tank. Just a wistful thought, it would be really cool to graph the water release statistics. This dashboard is great!