Congress had to approve the project because it was 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. Secure .gov websites use HTTPS "It is unknown how much area of the Feather River and Shasta Lake drainages are impacted by hydrophobic soils.". Shasta, Oroville, Hetch Hetchy and many others were built by damming large rivers. Its just small enough that the name doesnt appear as the bar is too thin. That said, most of its outflow makes its way down Feather River (via Rock Creek Reservoir) and ultimately into Orville. Located in the northwest portion of Yosemite National Park, Hetch Trinity Lake, with a capacity of 2,447,650 acre-feet, had the smallest increase, from 29% in December to 30% in January. And early forecasts show the rest of the wet season is not likely to produce enough precipitation. Its not possible to see or really interact with the tiniest slivers. It has no natural inflow or out flow. 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. I have to agree with many people here what a great job making such a clear graph of whats happening. 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. Article X, Section 2 that requires diversions for all water Trailhead address: Evergreen Road (Hetch Hetchy Road), Yosemite National Park, CA 95321. Restoring Hetch Hetchy will require some changes in how San Francisco moves and stores water. If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down.
Water Quality Updates | Water Resources Prior to The Chronicle, she worked as a data journalist for Honolulu Civil Beat, a watchdog news organization covering the Hawaiian islands. David Rizzardo, hydrology section manager for the California Department of Water Resources, said there are a lot of factors that affect reservoir storage. A 1 week change would be interesting to show on each. For the higher elevations, more of their water comes directly from snowmelt. 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. YTD values are from January 1 . 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. It seems likely one of those two readings is wrong. All Rights Reserved. Data have been checked by the reporting agency. 9 of 12 10 of 12 Hetch Hetchy Reservoir with Wapama Falls near Groveland, Calif. on Wednesday March 12, 2014, is currently at fifty percent of capacity. Copyright Barry Rokeach, 2014. Much of the recent inflow was to Hetch Hetchy, which can hold. 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. Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. Love this. Especially for small ones it is hard to identify them and click on them. It used to be full (and beyond). What period does CA use for Historical Average? It will be very different depending on the period chosen. Horoscope for Friday, 3/03/23 by Christopher Renstrom, No seriously, dont drive up to Tahoe this weekend, Wife of Jeffrey Vandergrift issues somber update, Snowboarder dies at Tahoe ski resort following historic blizzard, Scream publicity stunt floods Bay Area dispatch with 911 calls, The best fried chicken is at a San Francisco strip club, Rain reenters Bay Area forecast: Have an umbrella near you, The Warriors broke Russell Westbrook, just like old times, Mochi muffin bakery closes SF cafe after just 4 months, Arrest in killing of woman seen running through Tahoe campground, Oakland ransomware attackers leak 'confidential' data, California Department of Water Resources website, 14 things you need in your car before you drive to Tahoe. I appreciate the information you are providing. How do I contact support? Really appreciate the work you did to build this graph. Should be fixed at some point. resizeframe();
The information on Isabella has been fluctuating drastically (by a factor of 10!) An official website of the United States government. 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. The captured water is piped 150 miles to the Bay Area. 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. dam and restoring the valley. window.addEventListener("orientationchange", function() {
drained by the Tuolumne
Can a rock climber help 'restore' Yosemite's Hetch Hetchy Valley? located in a national park and it passed the Raker Act in 1913 to One gauge in the area has measured 6.12 inches since Oct. 1, which is 899% of normal. Locked padlock 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. reserved. My guess would be that the recent systems have been cold and so they are predominantly dropping snow on the watershed. 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. 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). Next feature request: wire in aquifer level data! "It was a very healthy shot in the arm. Assistant General Manager for Water Steven Ritchie credits the way the system is managed along with lower. How can I match up other monitoring locations similar to the ones on this Interactive Dashboard? Getting There. Curious why Shasta lake seems to be making big gains in water coming in and Trinity not so much? 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. While constructed and owned by San Francisco, the water system was in fact planned to benefit the greater San Francisco Bay Area population. Begin at O'Shaughnessy Dam. No it is correct. 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. Greetings from Mount Laurel New Jersey. They also built a spillway that was too steep and did not install energy dissipators along the spillway. 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. "In contrast, the Shasta Lake drainage had only a couple of stations in excess of 10 inches whereas most received less. Im curious why the percentage of capacity has stayed almost flat for the past 6 weeks or so and below historical average. Before returning to the Bay Area, she held roles as transportation reporter and trending news reporter at the IndyStar in Indianapolis. //this function is called from the javascript from within the iframe after the contents of iframe are loaded (and after an additional 150ms delay)
The dam and reservoir are the source for the Hetch Hetchy Aqueduct, which provides water for over . For perspective, water demand across the SFPUCs service area of 2.7 million people was about 205,000 acre-feet last fiscal year. Top ways to experience Hetch Hetchy Reservoir and nearby attractions Yosemite: Audio Driving Tour 1 Full-day Tours from $9.99 per group (up to 8) Private Yosemite Explorer Package | 3 Days of Adventure 3 Private and Luxury from $750.00 per adult (price varies by group size) Private Family Photo Day in Yosemite 78 Recommended Full-day Tours from Is that a good thing? In 2021, the SFPUC and the Modesto and Turlock Irrigation Districts launched a proactive pilot program with the U.S. After record snowfall in December was followed by a dry January, there are renewed concerns of drought. The soaking was welcome in a drought-plagued state with a diminishing water supply. A separate vote would have been An improvement: Could you include a bar for Last year at this date?
Is California's Drought Over? Here's What You Need To Know About Rain function resizeframe(){
Units are in kaf, thousands of acre feet. Is that from melting snow and rain water coming from the mountains and filling it up? Visualization was done in javascript and specifically the D3.js visualization library. Great stuff. Compared to the historical snowpack for this time of year, the May 2021 survey shows that we are only 2 to 5 percent of normal. For some strange unknown reason, they are not allowing the lake to fill up. Previously, Kellie covered dining news and trends, visual arts, events and nightlife for the Arizona Republic, and freelanced for the former Contra Costa Times. Shasta is very large and could hold about 3.5 cubic kilometers of water at full (but not flood) capacity. Just in case a large storm hits, that way they dont reach 100% capacity.
Only improvement I would suggest is an improvement of the display of the smaller reservoirs so the names are readable. Official websites use .gov The overall storage is said to have dropped by 57.4 to 56.4 (or 302 kaf). 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. 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. You can also use it to monitor only the reservoirs you are most interested in. The average for this time of year is approximately 4,659.57ft, plus or minus 39ft. After the reservoirs Hi Keith, you could de-select the large reservoirs from the menu at the top right. Shasta is the reservoir with the largest capacity and so it is the tallest row. Thats enough to supply the citys service area for perhaps seven years. Jeff, the average changes daily as well. Local reservoir inflows have negative daily flow rates set to zero. not passed until 1928 five years after the dam was built. I dont know if weve seen anything like this in October before.".
His recent work has examined the impacts of drought, threats to public lands and wildlife, and the nation's widening rural-urban divide. Much of the water passing through Holm would be diverted into the Mountain Tunnel and be used to generate power a second time at the Moccasin powerhouse. The blue line indicates the reservoirs water level one year ago today. Email: kellie.hwang@sfchronicle.com, Yoohyun.Jung@sfchronicle.com Twitter: @KellieHwang, @yoohyun_jung. use must be reasonable.. best to drain the valley. It could be the 180% of historical average of snowpack, which will be melting in a couple months. But the growing water reserves dont please everyone. **new combined California reservoir and snowpack visualizer**, made a bar graph showing the overall level of water in the major California reservoirs, the California Department of Water Resources (DWR) Data Exchange Center. As it is, at first glance, it looks like shasta is at the top because its 28000 instead of 4552. very nice product overall. Thanks for providing it for public information. Waterfalls gushed at Hetch Hetchy after an atmospheric river event in October 2021. I live in the central valley. 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. LK ELEANOR NR HETCH HETCHY CA. 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. What happened to the Hetch Hetchy level? This local water is captured in reservoirs located in San Mateo and Alameda counties. Although Hetch Hetchy Reservoir is the most well-known, it stores less than 25% of the system's water. 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. The gain came after weather gauges in the area recorded more than 5 inches from one storm. 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. The Hetch Hetchy Reservoir in Yosemite delivers water to 2.6 million Bay Area residents every day. Several cities and water agencies that are now part of BAWSCA urged Congress to pass the Raker Act in 1913, the law that allowed federal lands in the Sierra Nevada Mountains, including Hetch Hetchy Valley in Yosemite National Park, to be used to build the water system. For detailed analysis of how San Franciscos water system will operate without Hetch Hetchy reservoir, see the Environmental Defense Funds studiesParadise RegainedandCherry Intertie Alternative. Thanks for taking the time to do that. This is also affected by most of these dams multi-purpose nature where they are near constantly releasing for power(like Shasta) or to make room for flood control capacity(like Folsom). By a large measure, damming and flooding Hetch Hetchy is the most significant damage ever allowed in any of our national parks. Ive been meaning to search for aquifer levels. But I would never have imagined how to put all the important information into a single plot. A .gov website belongs to an official government organization in the 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. thanks. Nate, thanks for the insight. It would be really interesting to visualize whether were able to replenish ground water this year after all the precipitation. The citys water system also includes a water bank at Don Pedro Reservoir along the Tuolumne River, which was full as of Feb. 1. Share sensitive information only on official, secure websites. She is a University of Washington graduate.
Hetch Hetchy today | Restore Hetch Hetchy CFR Title 33. Navigation and Navigable Waters 33 CFR 208.82 | FindLaw Hetch Hetchy Regional Water System The Hetch Hetchy watershed, an area located in Yosemite National Park, is the major source of water for all of San Francisco's water needs. 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. Monitoring location 11277500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. 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. Secure .gov websites use HTTPS A wet December produced ample snowfall, which is still sitting at high elevations. Having it here would be great! 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. During the winter months, they let water out of the reservoirs in anticipation of large storms. Steve Ritchie, the San Francisco Public Utilities Commission's assistant general manager for water, said the additional water amounted to roughly 11% of the reservoir's total capacity.