Your email address will not be published. I was thinking that it would be interesting to compare inflows and outflows. HETCH HETCHY RES A HETCH HETCHY CA. 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. 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. I had a class in spillway design many years ago. Our drinking water comes from a variety of protected sources carefully managed by the SFPUC.
I noticed that Folsom does not change whereas every reservoir changes on an hourly update. looks like the CDEC website is the cause of the issue unless it actually dropped 90% in a day: Historical average is near unattainable these days. 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. The overall storage is said to have dropped by 57.4 to 56.4 (or 302 kaf). An improvement: Could you include a bar for Last year at this date? San Francisco maintained the phrase only Especially for small ones it is hard to identify them and click on them. Within San Francisco, we manage water distribution in the City. For each of the top 8 reservoirs the storage has increased by a total of 217 kaf, however). 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. .
The reservoir is eight miles long and the largest single body of water in Yosemite. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. pertained to water that was wasted, and there was no claim that Climbers Timmy O'Neill (left) and Lucho Rivera atop a wall overlooking Hetch Hetchy Reservoir. Restore Hetch Hetchy intends to undo this Great American mistake, and return the valley to Yosemite National Park and all people. "In contrast, the Shasta Lake drainage had only a couple of stations in excess of 10 inches whereas most received less. In the year prior to Oroville reaching capacity the interactive chart showed the rate of inflow over time. dam and restoring the valley. We own and operate the Hetch Hetchy Regional Water System which serves 2.7 million customers. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. Congress had to approve the project because it was Ive looked at reservoir sights for years. The snowpack there, which will eventually melt and flow into reservoirs, is already bigger than the average peak snowpack, which typically comes around April 1. 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. setTimeout(function (){
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. Only improvement I would suggest is an improvement of the display of the smaller reservoirs so the names are readable. 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? 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 . reserved. 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. word for a type of wild grass.
California drought: 2 reservoirs near Hetch Hetchy tapped - SFGATE San Francisco and the thousands of suburban . 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. You can find the charts below from the California Department of Water Resources website. I would think with the rain it would get to historical average and then more outflow would happen. 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. Ronald Reagan and George W. Bush. The valley is With modest additional investments San Francisco will be able to maintain an uninterrupted supply of high quality Tuolumne River water. Born in Seoul, Yoohyun began her career in Arizona, where she worked for two of the state's largest newspapers covering various beats, including criminal justice and education. Kurtis Alexander is an enterprise reporter for The San Francisco Chronicle, with a focus on natural resources and the environment. 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. Love this. Add a button to convert the row heights to log scale. Locked padlock environmental context. 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. Forty-six percent . The blue line indicates the reservoirs water level one year ago today. In Yosemite National Park, the Hetch Hetchy reservoir relies. In fact, thanks to a little snowmelt, water levels were up for all reservoirs from December to January. It carried workers and materials for the dam, as well as tourists, postage and other amenities. 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. Delivering approximately 260 million gallons of water per day, the regional system consists of over 280 miles of pipelines, over 60 miles of tunnels, 11 reservoirs, five pump stations and two water treatment plants. Nice!
Reservoir levels rising. 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. Hetch Hetchy water travels 160 miles via gravity from Yosemite to the San Francisco Bay Area. Each row represents one reservoir, with bars showing how much of the reservoir is filled (blue) and unfilled (brown). The commission plans to decide Nov. 23 whether to formally ask customers to conserve water. However, I am interested in how much we are saving. 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. however, Ill update the code to include it soon. 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? DWR is one of many local, State and Federal entities that dictate water releases. Lake Mendocino and Lake Berryessa water levels stayed the same. All Rights Reserved. During most years, there will be a 30-day shut down of the Hetch Hetchy source in the winter months. This website along with another shows that Eastmans level is still rising even though we have not had rain in more than a week. currently, there is a lot more water coming in than going out. It was my first time using D3 and it took me a long time to get up to speed.
Hetch Hetchy Reservoir - O'Shaugnessy Dam - National Park Service 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. Thank you for the time and effort in creating the graphs. This is a very clear graph and I cannot imagine the hours you have put in while setting it up and doing the maintenance. Sacramento CA 95833, Everything about California water that matters, Western States Water Agencies and Districts. For example, the average storage level for Feb. 7 is usually 65% of capacity for Trinity Dam, but currently its at 31%.
Amid a worsening drought, water supplies at one important reservoir are Hetch Hetchy Reservoir in Yosemite National Park is seen in 2022. Owned by the city of San Francisco, Hetch Hetchy Reservoir Required fields are marked *.
Hetch Hetchy today | Restore Hetch Hetchy The information on Isabella has been fluctuating drastically (by a factor of 10!) Crystal Springs Reservoir, along Highway 280 in San Mateo County, was 89 percent . 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). Water is rapidly flowing into the state's reservoirs. 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 December, and on Feb. 7, it was up to 82%. This site is a great tool, especially as we try to climb out of these drought years. United States. Didnt realize how bad things were there. The SFPUC gets the bulk of its water from a network of reservoirs in the central Sierra Nevada that have long altered flows of the Tuolumne River and its tributaries. The surplus has renewed concerns about San Francisco stockpiling water at the expense of rivers and the fish and wildlife that live there. An official website of the United States government.
A Map and Guide to Hetch Hetchy Reservoir at Yosemite - TripSavvy 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. Units are in kaf, thousands of acre feet. function reloadiframes(){
SFPUC announces Hetch Hetchy reservoir at less than 65 percent capacity Reservoir behind OShaughnessy Dam does not require filtration. This almost happened with the Orville Dam in 2017. I love this this site too. At times, nearly 90% of the flow of the Tuolumne River is piped off by the SFPUC and other water agencies in the region. 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. The half-hour drive to Hetch Hetchy from CA Highway 120 begins outside the park boundaries. Only modest new supplies would be required in the driest years. The main goal of this visualization is to provide a quick overview of the status of the main reservoirs in the state and how they compare to historical levels. She joined the Chronicle as a data reporter in 2021. SFPUC said as of this week, the Hetch Hetchy reservoir is at 92 percent capacity.
Usually with warm ARs, you get a dramatic increase in inflow, which can fill even very large reservoirs relatively quickly, like Oroville in 2017. Click here for the SFPUC's 2020State of the Regional Water System Report. Folsom is like an overflow tank. Saved to my favorites now. You can also use it to monitor only the reservoirs you are most interested in. 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.
Bay Area: Do You Know Where Your Water Comes From? Stay up-to-date with breaking news and upcoming events. Thank you for a beautiful job. . Could you also do the same for the Colorado River reservoirs to see how they are fairing? document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Subscribe to receive email notifications of new content. At the moment, I am not interested in the debate. The average for this time of year is approximately 4,659.57ft, plus or minus 39ft. These graphs will always read low because they represent the percentage of the seasonal average at some point before the end of the season. This was helpful to project seasonal trends & storm impacts. So included in DWR #S. 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. Great graphs and very useful. The captured water is piped 150 miles to the Bay Area. This other page: https . 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.