Lots of possibilities, just curious. https://waterdata.usgs.gov/monitoring-location/11275500/#parameterCode=00054&period=P7D. Although Hetch Hetchy Reservoir is the most well-known, it stores less than 25% of the systems water. The BAWSCA agencies are therefore key stakeholders in ensuring the system serves as a reliable source of high quality water. The trail includes spectacular views of Tueeulala and Wapama Falls. Then it has the appearance of something filling up, while still providing all the detail. Visualization was done in javascript and specifically the D3.js visualization library. By a large measure, damming and flooding Hetch Hetchy is the most significant damage ever allowed in any of our national parks. 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. That includes the Tuolumne River, which provides water via Hetch Hetchy Reservoir to Bay Area customers. Hetch Hetchy Reservoir in Yosemite National Park is seen in 2022. In fact, thanks to a little snowmelt, water levels were up for all reservoirs from December to January. Amid a worsening drought, water supplies at one important reservoir are reservoir violates the California Constitution specifically the This is a marimekko (or mekko) graph which may take some time to understand if you arent used to seeing them. document.getElementById('globes').contentWindow.location.reload(); 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. "It was a very healthy shot in the arm. San Francisco and the thousands of suburban . Lake Mendocino and Lake Berryessa water levels stayed the same. Historical average is near unattainable these days. 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. HETCH HETCHY RES A HETCH HETCHY CA - USGS Water Data for the Nation 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. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. 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. This is my first year watching the levels, so maybe Im missing something. Water data back to 1930 are available online. Hetch Hetchy is only one of nine reservoirs in the San Francisco Public Utility Commission's water system. For perspective, water demand across the SFPUC's service area of 2.7 million people was about 205,000 acre-feet last fiscal year. I realize there we dont want to reservoirs overflowing, but why are we still below historical average? not passed until 1928 five years after the dam was built. Python is used to extract the data from this page hourly and wrangle the data in to a clean format. A 1 week change would be interesting to show on each. 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. 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 . Important Legacy real-time page. Should be fixed at some point. Secure .gov websites use HTTPS Secure .gov websites use HTTPS BAWSCA Board of Directors Meeting, March 16, 2023, 6:30 PM. It was my first time using D3 and it took me a long time to get up to speed. the Hetch Hetchy Valley to its natural state. I noticed that Folsom does not change whereas every reservoir changes on an hourly update. Maybe just acre/ft with ^ or down arrow. Charts from the California Department of Water Resources show conditions at key state reservoirs on Oct. 22 (left) and on Nov. 2 (right). If you look at the inflow data on the major reservoirs, its pretty flat. I wonder why it doesnt work for you. All rights function resizeframe(){ A wet December produced ample snowfall, which is still sitting at high elevations. located in a national park and it passed the Raker Act in 1913 to } 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. 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). Similar findings are described in theUC Davis studyRe-Assembling Hetch HetchyandUS Bureau of Reclamation study. draining the reservoir to court, arguing in 2015 that the administration attempted to allocate funds to study removing the What rates am I paying? 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 required on whether to demolish OShaughnessy Dam. Monitoring location 11277500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. 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. 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. Storage and Delivery Updates | SFPUC The water travels through a series of pipelines before it reaches the Bay Area and blends with five local reservoirs. I recently joined the team with Restore Hetch Hetchy as Engagement & Development Director. Since June 2011, the Water Enterprise has operated the Citys Emergency Firefighting Water System (EFWS, formerly known as the Auxiliary Water Supply System (AWSS)), an independent, high-pressure water supply system for fire suppression. The half-hour drive to Hetch Hetchy from CA Highway 120 begins outside the park boundaries. 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? Hetch Hetchy | Hetch Hetchy Dam & Reservoir History | Yosemite.com Lake Almanor isnt controlled by DWR for flood/supply. Required fields are marked *. The Hetch Hetchy Valley today with the dam seen in the lower right. You dont see runoff right away, the snow is still up there, frozen, doing what we want it to do, he said. Have you looked into that side of the water management equation? John Muir and the Located within the boundaries of Yosemite National Park, the reservoir saw a sizable 21.31-foot bump in its water level and gained 36,300 acre-feet, according to Tuesday data from the U.S. Geological Survey. Really appreciate the work you did to build this graph. 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. P.S. As it is, at first glance, it looks like shasta is at the top because its 28000 instead of 4552. very nice product overall. Long-term values for reservoir inflows use maximum number of complete water years in record. A truly excellent project. But the growing water reserves dont please everyone. Great Job on this site! I would think with the rain it would get to historical average and then more outflow would happen. This dashboard provides a bit more detail on the state of each of the reservoirs while also showing an aggregate total. Wapama Falls Trail | Yosemite National Park | Hikespeak.com O'Shaughnessy Dam was built on the Tuolumne River in 1923 to create Hetch Hetchy Reservoir. 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. The middle portion of the watershed from New Don Pedro Reservoir to above Hetch Hetchy Reservoir is characterized by deep canyons and forested terrain. environmental context. Water data back to 1956 are available online. Map shows stunning improvement in California drought has a graph which shows how the historical avg changes throughout the year (oscillating between ~15000 and ~21000). Interactive California Reservoir Levels Dashboard - Engaging Data A .gov website belongs to an official government organization in the Click here for the SFPUC's 2020State of the Regional Water System Report. Francisco Public Utilities Commissions 26 wholesale customers LK ELEANOR NR HETCH HETCHY CA. Great URL. I live in the central valley. I had a class in spillway design many years ago. She was previously an engagement reporter. So on Jan 10 were at 82% of the average for Jan 10. Your tools are awesome just hurts when you receive bad data at times! Arg. the issue, including those under Franklin Delano Roosevelt, Together, the BAWSCA agencies account for two-thirds of water consumption from the system and pay for two-thirds of its upkeep. It seems likely one of those two readings is wrong. 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. Didnt realize how bad things were there. 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. Is that from melting snow and rain water coming from the mountains and filling it up? Exclusive: Stunning photos show Yosemite National Park under 15 feet of Warriors treating Andrew Wiggins with understandable patience, but his California snowpack hits highest level this century for March, could Map shows which parts of California exceeded entire years worth of rain, Map shows stunning improvement in California drought, Last chance to see: Bay Bridge lights turn off on Sunday. Hours: Year-round, but only accessible by car when the Hetch Hetchy Road is open. Is it because the laws have changed on how much each reservoir can hold or is it in anticipation of significantly more rain? Monitoring location 11277200 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. looks like the CDEC website is the cause of the issue unless it actually dropped 90% in a day: Hetch Hetchy Regional Water System, which serves San Francisco, But they'll cost you, Fight at high school basketball game in S.F. lawsuit, saying Restore Hetch Hetchys arguments were preempted His recent work has examined the impacts of drought, threats to public lands and wildlife, and the nation's widening rural-urban divide. 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. River. Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA. Each row represents one reservoir, with bars showing how much of the reservoir is filled (blue) and unfilled (brown). Shasta, Oroville, Hetch Hetchy and many others were built by damming large rivers. 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). The adopted Plan addresses water quality issues affecting the ecosystem and fisheries of the Bay-Delta system. Why is it not listed? Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. Good info to know. 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. Hetch Hetchy gushes over wetlands Institute of the Environment and You can email her at agraff@sfgate.com. California snowpack hits highest level this century for March. Lake Mendocino, which has a capacity of 122,400 acre feet, saw the biggest boost from 17% of storage capacity in December to 35% in January. Curt, Good point re the colder weather dropping more snow instead of rain at higher elevations this year. Yep. I was thinking that it would be interesting to compare inflows and outflows. mandate within The advocacy group Restore Hetch Hetchy took its case for 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. Love the dashboard! Begin at O'Shaughnessy Dam. Fish and Wildlife Service that provides an immediate $4 million investment for habitat improvements for fisheries in the Tuolumne River. Its supposed to be brown. Spring snowmelt runs down the Tuolumne River and fills Hetch Hetchy, the largest reservoir in our water system. Even with all the rain and floods, still a long way to fill them to capacity. Our flagship blog features analysis of news from our staff and announcements of upcoming events. 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? How come the totals disagree with the cal map graphic? Department of Water Resources is just another in a long line of completely mismanaged California entities. Hetch Hetchy Reservoir - O'Shaugnessy Dam - National Park Service This would allow us to see important, but noise-level reservoirs like hetch hetchy. "In contrast, the Shasta Lake drainage had only a couple of stations in excess of 10 inches whereas most received less. Hetch Hetchy today | Restore Hetch Hetchy This file photo shows Shasta Lake. the city wastes water, so it was a moot issue. California reservoir water levels before and after winter storm Kellie Hwang is the newsletter editor for The San Francisco Chronicle. Trailhead coordinates: 37.946905, -119.787376 (37 56 48.85N 119 47 14.55W) The overall storage is said to have dropped by 57.4 to 56.4 (or 302 kaf). currently, there is a lot more water coming in than going out. 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. Ronald Reagan and George W. Bush. Curious why Shasta lake seems to be making big gains in water coming in and Trinity not so much? . Thank you so much for the hard work! Hetch Hetchy Reservoir in Yosemite was 69 percent full on Tuesday, 150 percent of normal for this time of year. At times, nearly 90% of the flow of the Tuolumne River is piped off by the SFPUC and other water agencies in the region. 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. Yoohyun Jung is the Deputy Data Editor for The San Francisco Chronicle. I have wanted to do exactly this plot for years. These graphs will always read low because they represent the percentage of the seasonal average at some point before the end of the season. 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. Maintaining this variety of sources is an important component of our near and long-term water supply management strategy. I dont think its currently above the historical average, not below 1 year ago. 95 percent of. proposed as a source of water following the 1906 San Francisco Absolutely zero reason to be releasing this much water from these reservoirs. How Fast Are California Reservoirs Filling Up? hetch hetchy reservoir level percentage Rivers and Streams Streams draining into the Peninsula Watershed within the project area are relatively small, steep, and in a 2021-11-17. I notice Briones Reservoir is not on the list. She joined the Chronicle as a data reporter in 2021. construction in the 1920s, various groups have lobbied to restore Article X, Section 2 that requires diversions for all water This is wonderful information. McClintock bill proposes to improve public access at Hetch Hetchy. At the same time, theyve also said its critical to maintain sufficient water supplies to keep Bay Area communities and its economy running during a prolonged drought. In addition, San Francisco receives approximately one-tenth of its power from hydroelectricity generated by the gravity-driven flow from the Hetch Hetchy Reservoir. This is the best one out there. So its volume is counted as Orville inflow. This is a great and very thoughtfully designed web site! The judge also noted the provision of the state I believe the spillway was designed by the State. California drought: Charts show where reservoir levels stand after a She is a University of Washington graduate. provides water to 2.7 million residents and businesses in the San do so. Instructions: Current as of October 03, 2022 | Updated by . Restore Hetch Hetchys subsequent appeal to the ruling was The water treatment facilities are Tesla Ultraviolet Treatment Facility, disinfecting the Hetch Hetchy supply; Sunol Valley Water Treatment Plant, treating the water from the Calaveras and San Antonio supply as well as the stored Hetch Hetchy supply; and Harry Tracy Water Treatment Plant, treating the water from the Crystal Springs and San Andreas supply. 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. She is also an alumna of Reveal from the Center for Investigative Reporting Investigative Fellowship and The New York Times Student Journalism Institute. Water data back to 1956 are available online. They have restoredMono Lake,improved stream flows on the North Coast and in theCentral Valleyand diminished the threat to native fish in the Bay Delta. 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. The proportion of blue to brown will show how full it is, while the red line shows the historical level that reservoir is typically at for this date of the water year. It was the only tool that I could find that would allow me to make a vertical marimekko graph. The reservoir is eight miles long and the largest single body of water in Yosemite. Could the reason be that the water from Lake Alma or seems to be used for energy generation, and that there does not seem to be any agricultural or urban use? The new 68-mile (109 km) railroad wound its way up the narrow canyon of the Tuolumne River past sharp curves and up steep 4% grades. 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. drained by the Tuolumne A Map and Guide to Hetch Hetchy Reservoir at Yosemite - TripSavvy "Soils that have become hydrophobic due to wildfire can also contribute to increased runoff because the water is less able to penetrate the burned soil," the department said. //this function is called from the javascript from within the iframe after the contents of iframe are loaded (and after an additional 150ms delay) window.addEventListener("orientationchange", function() { Its just small enough that the name doesnt appear as the bar is too thin. 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. 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Therefore flood control agencies take the more conservative route and order the release of water. Monitoring location 11275500 is associated with a LAKE, RESERVOIR, IMPOUNDMENT in TUOLUMNE COUNTY, CALIFORNIA.