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. Hetch Hetchy Reservoir in Yosemite National Park is seen in 2022. 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. The commission plans to decide Nov. 23 whether to formally ask customers to conserve water. Tracy Barbutes, Freelance / Special to The Chronicle, Heres where California reservoir levels stand after this weeks rains. Its promising, but too early to let our guard down, said Joseph Sweiss, spokesman for the San Francisco Public Utilities Commission, the citys water purveyor, in an email to The Chronicle. 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. 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. A separate vote would have been Kellie Hwang is the newsletter editor for The San Francisco Chronicle. the Bay Area. Gavin Newsom asked all California residents to voluntarily reduce use by 15% compared with use in 2019. But the growing water reserves dont please everyone. Here's what that means. This file photo shows Shasta Lake. It carried workers and materials for the dam, as well as tourists, postage and other amenities. At this facility, which is shared with other water agencies, the city can stash water for credits against future draws on the river. Hetchy Reservoir can store as much as 117 billion gallons for the Construction of the regional water system proceeded over the following 20 years, with water first delivered in 1934. Upcountry and the Bay Area. How Fast Are California Reservoirs Filling Up? It could be the 180% of historical average of snowpack, which will be melting in a couple months. Have you looked into that side of the water management equation? While forecasters can predict the likelihood of future rainfall over large areas, they cant pinpoint it to the degree needed to determine whether a particular watershed/reservoir will overflow and cause damage and loss of life. Copyright Barry Rokeach, 2014. DWR is one of many local, State and Federal entities that dictate water releases. document.getElementById('globes').contentWindow.location.reload(); I had a class in spillway design many years ago. Thanks for putting this together. While the rainfall has been bad for many people, I am happy to see Californias reservoirs are benefiting slightly, Amen! Is the Stanley Quencher tumbler worth its TikTok hype? They placed a few dissipators just before the river. It is also the amount of water in a cube that is 352 feet per side (about the length of a football field). The construction of the Hetch Hetchy Railroad took place from 1915 to 1918. Important Legacy real-time page. The trail includes spectacular views of Tueeulala and Wapama Falls. Hours: Year-round, but only accessible by car when the Hetch Hetchy Road is open. Article X, Section 2 that requires diversions for all water Omar, Thanks! 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. How do I pay my bill? required on whether to demolish OShaughnessy Dam. For the first week of February, there was a slight increase for most reservoirs from January amounts. and maybe another vertical axis to the right of that with reservoir capacity. To reach Hetch Hetchy, you have to exit Yosemite National Park and re-enter it. It was the only tool that I could find that would allow me to make a vertical marimekko graph. Crystal Springs Reservoir, along Highway 280 in San Mateo County, was 89 percent . A small portion of the citys water comes from local reservoirs. 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). In the year prior to Oroville reaching capacity the interactive chart showed the rate of inflow over time. San Franciscos water-bank in Don Pedro Reservoir, downstream on the Tuolumne River, holds twice as much water as Hetch Hetchy. Thanks. 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. Santa Clara, Alameda and San Mateo counties. Historical average is near unattainable these days. Should be fixed at some point. If you are on a mobile device you can tap the reservoir to get that same info. The valley is In Yosemite National Park, the Hetch Hetchy reservoir relies. Local reservoir inflows have negative daily flow rates set to zero. These sources are diverse in both the origin of the supply snowmelt, rainfall and recharge of groundwater and their location within our system. California snowpack hits highest level this century for March. 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. administration attempted to allocate funds to study removing the San Francisco's water-bank in Don Pedro Reservoir, downstream on the Tuolumne River, holds twice as much water as Hetch Hetchy. 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 great suggestion and one that would be particularly helpful! The reservoir is eight miles long and the largest single body of water in Yosemite. Similar to the water supply issues discussed above, the amount of power replacement is small in a statewide context less than of 1% of the renewable power supply being developed this decade alone. McClintock bill proposes to improve public access at Hetch Hetchy. But they'll cost you, Fight at high school basketball game in S.F. Each row represents one reservoir, with bars showing how much of the reservoir is filled (blue) and unfilled (brown). Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. 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. This dashboard provides a bit more detail on the state of each of the reservoirs while also showing an aggregate total. 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). Call 209-372-0200 for the latest road and weather conditions, Hetch Hetchy Road Daily Hours: 8 am to 5 pm function resizeframe(){ So many facets beautifully chartered. Nate, thanks for the insight. The worst possible scenario is it just remains completely dry. Located in the northwest portion of Yosemite National Park, Hetch In 2021, the SFPUC and the Modesto and Turlock Irrigation Districts launched a proactive pilot program with the U.S. This dashboard is great! Take CA Highway 120 from the park toward Groveland. diversion of water? Restore Hetch Hetchy claimed the phrase had San Francisco operates three medium-sized hydro-electric power plants in the Tuolumne River watershed Kirkwood, Moccasin, and Holm. At times, nearly 90% of the flow of the Tuolumne River is piped off by the SFPUC and other water agencies in the region. Secure .gov websites use HTTPS best to drain the valley. 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. But they'll cost you, Fight at high school basketball game in S.F. 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. 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. Love the dashboard! 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.. "It was a very healthy shot in the arm. 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. 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. scenic mountain valley in a national park. Additionally, the bounty helps the more than two dozen communities in Alameda, San Mateo and Santa Clara counties that get their water from the city. Maybe just acre/ft with ^ or down arrow. Therefore flood control agencies take the more conservative route and order the release of water. window.addEventListener("orientationchange", function() { 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. 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As of Feb. 1, the systems total water storage was just over 1.3 million acre-feet, or about 92% of capacity. Trailhead coordinates: 37.946905, -119.787376 (37 56 48.85N 119 47 14.55W) Great Job on this site! Its great seeing all the reservoirs in California at or near historical averages. 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. This is of particular interest as the self-imposed restrictions deadline is approaching and the federal government may have to step in and mandate restrictions across the 7 states, including California.
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