Forty-six percent . 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. They placed a few dissipators just before the river. provides water to 2.7 million residents and businesses in the San Great Job on this site! Im curious: Lk Almanor is the 8th largest reservoir in CA. This dashboard is great! What happened to the Hetch Hetchy level? . Spring snowmelt runs down the Tuolumne River and fills Hetch Hetchy, the largest reservoir in our water system. 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). She has been with SFGATE for more than 10 years. After the reservoirs Love easy to read and understand information. City officials have touted their efforts to help salmon, for example by timing water releases to assist with migration and restoring breeding grounds. If you look at the inflow data on the major reservoirs, its pretty flat. The captured water is piped 150 miles to the Bay Area. The SFPUC has also raised concerns over the fishery benefits of the States Plan. 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? 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). 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. This is a great and very thoughtfully designed web site! Ive been meaning to search for aquifer levels. A question: the Historical Avg*, is it the value of year-today or natural year? looks like the CDEC website is the cause of the issue unless it actually dropped 90% in a day: The question was, what constitutes unreasonable method of Thank you! In another sign that Californias drought is easing, San Francisco captured more than a years worth of water in just one months time. It was my first time using D3 and it took me a long time to get up to speed. From the main road, it's about a 20- to 25-minute drive to the parking area. "This was rare for October. It used to be full (and beyond). Trailhead coordinates: 37.946905, -119.787376 (37 56 48.85N 119 47 14.55W) Similar findings are described in theUC Davis studyRe-Assembling Hetch HetchyandUS Bureau of Reclamation study. Shasta, Oroville, Hetch Hetchy and many others were built by damming large rivers. Lake Shasta and Mendocino are also well below average. 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). Usually with warm ARs, you get a dramatic increase in inflow, which can fill even very large reservoirs relatively quickly, like Oroville in 2017. . This other page: https . Interesting. Hetch Hetchy water travels 160 miles via gravity from Yosemite to the San Francisco Bay Area. mobilewarn(); The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. You dont see runoff right away, the snow is still up there, frozen, doing what we want it to do, he said. Curt, Good point re the colder weather dropping more snow instead of rain at higher elevations this year. Visualization was done in javascript and specifically the D3.js visualization library. McClintock bill proposes to improve public access at Hetch Hetchy. The half-hour drive to Hetch Hetchy from CA Highway 120 begins outside the park boundaries. It is also the amount of water in a cube that is 352 feet per side (about the length of a football field). This dashboard provides a bit more detail on the state of each of the reservoirs while also showing an aggregate total. http://www.tuolumnerivermanagementplan.com. Hours: Year-round, but only accessible by car when the Hetch Hetchy Road is open. 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. YTD values are from January 1 . use must be reasonable.. Lock Thanks. Water data back to 1956 are available online. GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System. What happened to the Hetch Hetchy level? in 2018. 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? A separate vote would have been Lake Almanor isnt controlled by DWR for flood/supply. We provide water directly to customers in San Francisco and wholesale through 26 Water agencies in Alameda, Santa Clara, and San Mateo counties. Restore Hetch Hetchys subsequent appeal to the ruling was Could you also do the same for the Colorado River reservoirs to see how they are fairing? Thanks for putting this together. There is something strange about the data over the last two days (Jan.17 to Jan. 19): Kudos to the designers. generates electricity for the city). For detailed analysis of how San Franciscos water system will operate without Hetch Hetchy reservoir, see the Environmental Defense Funds studiesParadise RegainedandCherry Intertie Alternative. 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. Its great seeing all the reservoirs in California at or near historical averages. California reservoir levels: . At this facility, which is shared with other water agencies, the city can stash water for credits against future draws on the river. Water data back to 1930 are available online. What rates am I paying? It could be the 180% of historical average of snowpack, which will be melting in a couple months. In the year prior to Oroville reaching capacity the interactive chart showed the rate of inflow over time. Winter weather conditions may cause road closures. Waterfalls gushed at Hetch Hetchy after an atmospheric river event in October 2021. For the first week of February, there was a slight increase for most reservoirs from January amounts. Awesome work!! rejected by an appellate court and the California Supreme Court Just a wistful thought, it would be really cool to graph the water release statistics. Before returning to the Bay Area, she held roles as transportation reporter and trending news reporter at the IndyStar in Indianapolis. Long-term values for reservoir inflows use maximum number of complete water years in record. What period does CA use for Historical Average? It will be very different depending on the period chosen. Another not monitored by the State? //this function is called from the javascript from within the iframe after the contents of iframe are loaded (and after an additional 150ms delay) And while one storm didn't come close to ending the drought, some reservoirs in Northern California, especially those that fell right in the path of the storm, saw significant gains. Super frustrating. 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. The valley is https://cdec.water.ca.gov/dynamicapp/QueryDaily?s=SHA If a reservoir gets filled to 100% and more, the dam will break and many cities will get flooded, so the operators are careful. 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. Hetch Hetchy is Monitoring location 11275500. O'Shaughnessy Dam was built on the Tuolumne River in 1923 to create Hetch Hetchy Reservoir. All rights Add a button to convert the row heights to log scale. 2013, photo, the Hetch Hetchy Reservoir is hazy with smoke . Although Hetch Hetchy Reservoir is the most well-known, it stores less than 25% of the system's water. San Francisco maintained the phrase only This is the first state (of 6 I have lived in) that has had water police and restrictions. the Bay Area. Thats enough to supply the citys service area for perhaps seven years. 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. "It was a very healthy shot in the arm. Francisco Bay Area. As it is, at first glance, it looks like shasta is at the top because its 28000 instead of 4552. very nice product overall. So many facets beautifully chartered. Californias largest water agencies, in both the urban and agricultural sectors, have invested in ambitious groundwater banking programs inKern County. the city wastes water, so it was a moot issue. Data and Tools Tracy Barbutes, Freelance / Special to The Chronicle, Heres where California reservoir levels stand after this weeks rains. The surplus has renewed concerns about San Francisco stockpiling water at the expense of rivers and the fish and wildlife that live there. Congress had to approve the project because it was Different presidential administrations also have tried to address A wet December produced ample snowfall, which is still sitting at high elevations. 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. Yep. . It updates hourly using data from the California Department of Water Resources (DWR) website, giving an up-to-date picture of California reservoir levels. UPDATE: Here's where California reservoir levels stand after this week's rains. At the beginning of this water year, which started on October 1, 2022, the state's largest water reservoir, Lake Shasta, was a third full, at 33 percent. Hi, I started by using this page (https://cdec.water.ca.gov/reportapp/javareports?name=RES) to determine which reservoirs to include and for some reason Almanor isnt on the list. Other California water agencies have done far more to reduce the impact of their system on Mono Lake, the Trinity and San Joaquin Rivers, and the Bay-Delta. However, I am interested in how much we are saving. FYI it looks like Isabella is reading incorrectly, likely because its well above 100%. The Hetch Hetchy reservoir, which supplies water for San Francisco and other parts of the Bay Area, was at 77% of its 360,000-acre-feet storage capacity in January compared to 73% in. A truly excellent project. Thank you so much for the hard work! 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. Thinking more about it. Ronald Reagan and George W. Bush. word for a type of wild grass. finding an alternative water and power source (Hetchy Hetchy also construction in the 1920s, various groups have lobbied to restore 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. In fact, thanks to a little snowmelt, water levels were up for all reservoirs from December to January. Part of the lake is on the California side, but it has zero California water impact beyond the immediate Tahoe residents. For the class we based all our designs on the USACE spillway design manual. window.addEventListener("orientationchange", function() { dam and restoring the valley. Thanks for developing it, and for sharing it with the rest of us! 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. proposed as a source of water following the 1906 San Francisco Hetch Hetchy Regional Water System, which serves San Francisco, Article X, Section 2 that requires diversions for all water With modest additional investments San Francisco will be able to maintain an uninterrupted supply of high quality Tuolumne River water. 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. 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.. Im curious why the percentage of capacity has stayed almost flat for the past 6 weeks or so and below historical average. Ive added it to my bookmarks for quick reference. 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. environmental context. A small portion of the citys water comes from local reservoirs. She was previously an engagement reporter. I live in the central valley. And early forecasts show the rest of the wet season is not likely to produce enough precipitation. Reservoir levels rising. P.S. I dont think its currently above the historical average, not below 1 year ago. I am new to the state. 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. It used to be full (and beyond). A lock ( "Some weather monitoring stations in the Feather River drainage received as much as 12 to 19 inches during the period of the storms," the department said. 2151 River Plaza Drive, Suite 205 I noticed that Folsom does not change whereas every reservoir changes on an hourly update. Yes, and why is Twitchell Dam also not listed? I will take a look and see if there are other important reservoirs missing and may add them in the future. Construction of the regional water system proceeded over the following 20 years, with water first delivered in 1934. The blue line indicates the reservoirs water level one year ago today. over the past few days. You can find the charts below from the California Department of Water Resources website. Located in the northwest portion of Yosemite National Park, Hetch however, Ill update the code to include it soon. 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. Quite an eye opener. 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. Should be fixed at some point. Diamond Valley Lake is a man-made storage reservoir for storing imported water only. 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 since it required flooding a Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. by the Raker Act. It does not meet the California definition of renewable energy. In 2016, a Tuolumne County Superior Court judge dismissed the A .gov website belongs to an official government organization in the 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. has a graph which shows how the historical avg changes throughout the year (oscillating between ~15000 and ~21000). It was the only tool that I could find that would allow me to make a vertical marimekko graph. Heres an example of that data for Shasta, where you can see the daily inflows and outflows: The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. An improvement: Could you include a bar for Last year at this date? The state's second-largest reservoir, Lake Oroville in Butte County, saw especially dramatic gains with a 30.4-foot rise in the water level and a 182,625-acre-foot increase in the total amount of water, data posted Tuesday from the California Department of Water Resources showed. Amy Graff is the news editor for SFGATE. One of the most impressive was Hetch Hetchy, which provides drinking water to 2.6 million people in San Francisco and other Bay Area communities. I have wanted to do exactly this plot for years. Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. While the rainfall has been bad for many people, I am happy to see Californias reservoirs are benefiting slightly, Amen! The worst possible scenario is it just remains completely dry. How Fast Are California Reservoirs Filling Up? Very nice work. required on whether to demolish OShaughnessy Dam. the issue, including those under Franklin Delano Roosevelt, Nice! Required fields are marked *. Meant this comment for the integrated snowpack and reservoir view. 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. The citys water system also includes a water bank at Don Pedro Reservoir along the Tuolumne River, which was full as of Feb. 1. I would think with the rain it would get to historical average and then more outflow would happen. Wonderful site. By a large measure, damming and flooding Hetch Hetchy is the most significant damage ever allowed in any of our national parks. 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.