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System for more than 60 percent of their drinking water. Great URL. 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. Article X, Section 2 that requires diversions for all water One gauge in the area has measured 6.12 inches since Oct. 1, which is 899% of normal. Thats enough to supply the citys service area for perhaps seven years. Hetch Hetchy gushes over wetlands Institute of the Environment and Francisco Bay Area. So many facets beautifully chartered. by the Raker Act. This is a great and very thoughtfully designed web site! Secure .gov websites use HTTPS earthquake. Love easy to read and understand information. Usually with warm ARs, you get a dramatic increase in inflow, which can fill even very large reservoirs relatively quickly, like Oroville in 2017. The half-hour drive to Hetch Hetchy from CA Highway 120 begins outside the park boundaries. Hetch Hetchy Reservoir in Yosemite was 69 percent full on Tuesday, 150 percent of normal for this time of year. This website along with another shows that Eastmans level is still rising even though we have not had rain in more than a week. San Franciscos water system, which includes Hetchy Hetchy, is expected to fill this winter for the first time since 2019. 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. It carried workers and materials for the dam, as well as tourists, postage and other amenities. She was born and raised in the Bay Area and got her start in news at the Daily Californian newspaper at UC Berkeley where she majored in English literature. This is the first state (of 6 I have lived in) that has had water police and restrictions. It seems likely one of those two readings is wrong. Thanks for developing it, and for sharing it with the rest of us! A different story is unfolding at Hetch Hetchy reservoir in Yosemite National Park, where water is being released to conserve and restore wildlife. We provide water directly to customers in San Francisco and wholesale through 26 Water agencies in Alameda, Santa Clara, and San Mateo counties. Gavin Newsom asked all California residents to voluntarily reduce use by 15% compared with use in 2019. A .gov website belongs to an official government organization in the This was helpful to project seasonal trends & storm impacts. Id love to see how much water is being / has been released from these reservoirs. Even with the latest precipitation, Folsoms values was unchanged. do so. around the Bay Area rely on the Hetch Hetchy Regional Water Official websites use .gov For detailed analysis of how San Franciscos water system will operate without Hetch Hetchy reservoir, see the Environmental Defense Funds studiesParadise RegainedandCherry Intertie Alternative. While the rainfall has been bad for many people, I am happy to see Californias reservoirs are benefiting slightly, Amen! 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. As it is, at first glance, it looks like shasta is at the top because its 28000 instead of 4552. very nice product overall. Tracy Barbutes, Freelance / Special to The Chronicle, Heres where California reservoir levels stand after this weeks rains. Great Job on this site! Visualization was done in javascript and specifically the D3.js visualization library. 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. While constructed and owned by San Francisco, the water system was in fact planned to benefit the greater San Francisco Bay Area population. Winter weather conditions may cause road closures. . Your tools are awesome just hurts when you receive bad data at times! Park visitors walk across OShaughnessy Dam in Yosemite National Park on Sept. 1. 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. Water data back to 1930 are available online. "In contrast, the Shasta Lake drainage had only a couple of stations in excess of 10 inches whereas most received less. But they'll cost you, Fight at high school basketball game in S.F. I wonder why it doesnt work for you. Hetch Hetchy Reservoir (Yosemite National Park) - Tripadvisor That includes the Tuolumne River, which provides water via Hetch Hetchy Reservoir to Bay Area customers. 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. There is something strange about the data over the last two days (Jan.17 to Jan. 19): Just in case a large storm hits, that way they dont reach 100% capacity. 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? In 2016, a Tuolumne County Superior Court judge dismissed the Im curious why the percentage of capacity has stayed almost flat for the past 6 weeks or so and below historical average. The captured water is piped 150 miles to the Bay Area. Impounded by OShaughnessy 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. 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. 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. 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. My guess would be that the recent systems have been cold and so they are predominantly dropping snow on the watershed. Nate, thanks for the insight. The cities of Burlingame, Hayward, Menlo Park, Palo Alto, Redwood City and San Mateo, along with the Alameda County Water District, were among Bay Area communities whose support was influential in persuading Congress to pass the controversial Act, and President Woodrow Wilson to sign it. This dashboard provides a bit more detail on the state of each of the reservoirs while also showing an aggregate total. But tearing down O'Shaughnessy Dam in order to restore Hetch Hetchy Valley would be a disaster. I think the problem is with the CDEC database (as the LakesOnline website also has had incorrectly high information). United States. It used to be full (and beyond). O'Shaughnessy Dam is a 430-foot (131 m) high concrete arch-gravity dam in Tuolumne County, California, United States.It impounds the Tuolumne River, forming the Hetch Hetchy Reservoir at the lower end of Hetch Hetchy Valley in Yosemite National Park, about 160 miles (260 km) east of San Francisco. How do I contact support? 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. however, Ill update the code to include it soon. construction in the 1920s, various groups have lobbied to restore ", The difference in soil type in the two watersheds was likely another factor. thanks. Why isnt Lake Sonoma included? 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. Most local reservoir inflow timeseries are too short to calculate long-term values. Different presidential administrations also have tried to address I love this this site too. Kudos to the designers. According to the San Francisco Public Utilities Commission, Hetch This file photo shows Shasta Lake. 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. 501(c)3 organization, federal tax ID #942419885. The dam and reservoir are the source for the Hetch Hetchy Aqueduct, which provides water for over . Much of the recent inflow was to Hetch Hetchy, which can hold. Why is it not listed? I dont think its currently above the historical average, not below 1 year ago. Fish and Wildlife Service that provides an immediate $4 million investment for habitat improvements for fisheries in the Tuolumne River. California reservoir levels: . By a large measure, damming and flooding Hetch Hetchy is the most significant damage ever allowed in any of our national parks. The windfall of water is welcome news for households and businesses in San Francisco, which use less water on average compared to the rest of the state but nonetheless have faced calls to cut back since 2021 because of water shortages. 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). This chart only shows reservoirs filled via natural flow/rainfall. Im curious: Lk Almanor is the 8th largest reservoir in CA. Diamond Valley Lake is a man-made storage reservoir for storing imported water only. supplies water to the San Francisco Bay Area.