I will take a look and see if there are other important reservoirs missing and may add them in the future. The half-hour drive to Hetch Hetchy from CA Highway 120 begins outside the park boundaries. System for more than 60 percent of their drinking 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. Heres an example of that data for Shasta, where you can see the daily inflows and outflows: 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. 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). February 21, 2023 - BAWSCA Statement on State Water Resources Control Board'sSchedule for Consideration of a Voluntary Agreement for the Tuolumne River. The reservoir is eight miles long and the largest single body of water in Yosemite. The middle portion of the watershed from New Don Pedro Reservoir to above Hetch Hetchy Reservoir is characterized by deep canyons and forested terrain. The name Hetch Hetchy is derived from a Sierra Miwok 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. Thank you so much for the hard work! Hetch Hetchy Regional Water System, which serves San Francisco, Shasta is very large and could hold about 3.5 cubic kilometers of water at full (but not flood) capacity. 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. since it required flooding a HETCH HETCHY RES A HETCH HETCHY CA. They are releasing water into the canals. I recently joined the team with Restore Hetch Hetchy as Engagement & Development Director. City officials have touted their efforts to help salmon, for example by timing water releases to assist with migration and restoring breeding grounds. I dont think its currently above the historical average, not below 1 year ago. 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. According to the San Francisco Public Utilities Commission, Hetch Saved to my favorites now. Its supposed to be brown. A truly excellent project. In fact, thanks to a little snowmelt, water levels were up for all reservoirs from December to January. The 1913 Raker Act authorized the unprecedented dam inside the park and also set the fee that the city pays to rent the entire valley in which the dam sits: $30,000 per year. by the Raker Act. Ive added it to my bookmarks for quick reference. Water is rapidly flowing into the state's reservoirs. Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. Excellent graphic! Its water supply Hetch Hetchy Reservoir, in the Sierra Nevada is 80% full, . 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. One of the big challenges in water management is controling the release. not passed until 1928 five years after the dam was built. Privacy Policy | 2011-2021 San Francisco Public Utilities Commission. November 10, 2022 - BAWSCA Statement on State Water-Policy Officials, SFPUC, and Districts Sign MOU for Tuolumne River to Help Recover Salmon While Protecting Water Reliability. The question was, what constitutes unreasonable method of It was at 60 percent as of March 1 and rising, according to the Bureau of Reclamation. Hetchy refers to a valley in the Sierra Nevada and a reservoir that My guess would be that the recent systems have been cold and so they are predominantly dropping snow on the watershed. Thanks for taking the time to do that. The blue line indicates the reservoirs water level one year ago today. The construction of the Hetch Hetchy Railroad took place from 1915 to 1918. . Thats enough to supply the citys service area for perhaps seven years. 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. United States. 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. 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 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. Just a wistful thought, it would be really cool to graph the water release statistics. Love the dashboard! Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available. mobilewarn(); Crystal Springs Reservoir, along Highway 280 in San Mateo County, was 89 percent . Californias largest water agencies, in both the urban and agricultural sectors, have invested in ambitious groundwater banking programs inKern County. Usually with warm ARs, you get a dramatic increase in inflow, which can fill even very large reservoirs relatively quickly, like Oroville in 2017. resizeframe(); 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. Great stuff. 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. David Rizzardo, hydrology section manager for the California Department of Water Resources, said there are a lot of factors that affect reservoir storage. Congressman Tom McClintock has re-introduced theYosemite National Park Equal Access and Fairness Act, a bill that would allow non-motorized Sign up to receive blog posts and other news by email. In 2007, the Bush Its just small enough that the name doesnt appear as the bar is too thin. 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. Visualization was done in javascript and specifically the D3.js visualization library. If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. Great resource! San Franciscos water system, which includes Hetchy Hetchy, is expected to fill this winter for the first time since 2019. 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). 2151 River Plaza Drive, Suite 205 One gauge in the area has measured 6.12 inches since Oct. 1, which is 899% of normal. The valley is The regional water system provides water to 2.4 million people in San Francisco, Santa Clara, Alameda and San Mateo counties. The source water from SFPUC is typically from the Hetch Hetchy reservoir located in the Sierra Nevada Mountains. 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. Folsom is like an overflow tank. Hetch Hetchy water travels 160 miles via gravity from Yosemite to the San Francisco Bay Area. The upcountry portion of the System begins with Hetch Hetchy Reservoir in Yosemite National Park. Why is it not listed? Omar, Thanks! Secure .gov websites use HTTPS Are they releasing water to relieve the pressure in anticipation of more water? Is the Stanley Quencher tumbler worth its TikTok hype? There is something strange about the data over the last two days (Jan.17 to Jan. 19): The amount stored is increasing, just not by a lot. Thank you! So on Jan 10 were at 82% of the average for Jan 10. Hetch Hetchy is Monitoring location 11275500. Thank you for the time and effort in creating the graphs. Lock Its not possible to see or really interact with the tiniest slivers. Especially for small ones it is hard to identify them and click on them. Email: kellie.hwang@sfchronicle.com, Yoohyun.Jung@sfchronicle.com Twitter: @KellieHwang, @yoohyun_jung. Local reservoir inflows have negative daily flow rates set to zero. 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. Partly because of low water, the rivers chinook salmon runs have plummeted from tens of thousands of fish annually a few decades ago to fewer than 1,000 in recent years. Department of Water Resources is just another in a long line of completely mismanaged California entities. Diamond Valley Lake is a man-made storage reservoir for storing imported water only. The SFPUC has consistently stated that voluntary agreements are the best path forward for the Bay-Delta, as the voluntary agreement strikes the right balance between environmental stewardship and water reliability. The Hetch Hetchy Valley today with the dam seen in the lower right. Eighty-five percent of the water comes from Sierra Nevada snowmelt stored in the Hetch Hetchy reservoir situated on the Tuolumne River in Yosemite National Park. Didnt realize how bad things were there. 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. BAWSCA agencies advocated for the capital improvement program that was adopted by the SFPUC in 2002, and are actively monitoring its implementation. Restore Hetch Hetchys subsequent appeal to the ruling was Rizzardo said there was a decent amount of flow into the reservoirs into January, even though weather-wise it was bone dry, a result of lower elevation snow at 4,000 to 6,000 feet making its way into the reservoirs. Why isnt Lake Sonoma included? ) or https:// means youve safely connected to the .gov website. Copyright 2023Water Education Foundation. Reservoir behind OShaughnessy Dam does not require filtration. The area around Shasta has more volcanic soils that absorb rainfall than the Feather River drainage. UPDATE: Here's where California reservoir levels stand after this week's rains. The average for this time of year is approximately 4,659.57ft, plus or minus 39ft. lawsuit, saying Restore Hetch Hetchys arguments were preempted 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. The SFPUC hoards water in dry years when they dont need to, said Peter Drekmeier, policy director at the conservation group Tuolumne River Trust. A different story is unfolding at Hetch Hetchy reservoir in Yosemite National Park, where water is being released to conserve and restore wildlife. It carried workers and materials for the dam, as well as tourists, postage and other amenities. YTD values are from January 1 . 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. Francisco Bay Area. Over the summer, Gov. The data on water storage comes from the California Department of Water Resources (DWR) Data Exchange Center. Yoohyun Jung is the Deputy Data Editor for The San Francisco Chronicle. It takes a fair amount of work to make graphs compared to other more plug-and-play libraries but its very customizable, which is a plus. San Francisco maintained the phrase only Curious why Shasta lake seems to be making big gains in water coming in and Trinity not so much? 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. "It is unknown how much area of the Feather River and Shasta Lake drainages are impacted by hydrophobic soils.". Locked padlock Love easy to read and understand information. "It's an increase of a few percent, . 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. I would think with the rain it would get to historical average and then more outflow would happen. 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? SFGATE took a look at reservoir levels three days after the Oct. 24 storm and below we take another look, examining water level rises and storage increases at a broader range of reservoirs roughly a week after the atmospheric river event. }, 150); This is wonderful information. Thanks. located in a national park and it passed the Raker Act in 1913 to Some want the city to leave more water in stream channels for threatened salmon while others continue a longshot bid to shut down Hetch Hetchy Reservoir in Yosemite altogether and return the area to its natural state. Shasta, Oroville, Hetch Hetchy and many others were built by damming large rivers. In 2021, the SFPUC and the Modesto and Turlock Irrigation Districts launched a proactive pilot program with the U.S. Water data back to 1956 are available online. Part of the lake is on the California side, but it has zero California water impact beyond the immediate Tahoe residents. 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. California drought: Charts show where reservoir levels stand after a dry January, Track water shortages and restrictions across Bay Area. And early forecasts show the rest of the wet season is not likely to produce enough precipitation. 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. Trailhead address: Evergreen Road (Hetch Hetchy Road), Yosemite National Park, CA 95321. Good info to know. In response to the Bay-Delta Plan, the SFPUC and the Modesto and Turlock Irrigation Districts have proposed the Tuolumne River Voluntary Agreement, a combination of flow and non-flow measures sufficient to improve all life-stages of native fish populations in the lower Tuolumne River. the Hetch Hetchy Valley to its natural state. 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. The OShaughnessy Dam i s 300 feet tall only medium-sized by todays standards. environmental context. Prior to The Chronicle, she worked as a data journalist for Honolulu Civil Beat, a watchdog news organization covering the Hawaiian islands. Hetch Hetchy Water System The system originates more than 100 miles from its primary customers, in Yosemite National Park. So my question is, How do we know if we are saving the water for later release (late summer) or are we releasing it to the ocean? I live close to Eastman Lake. in 2018. "In contrast, the Shasta Lake drainage had only a couple of stations in excess of 10 inches whereas most received less. From the main road, it's about a 20- to 25-minute drive to the parking area. The judge also noted the provision of the state LK ELEANOR NR HETCH HETCHY CA. 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. This is a great and very thoughtfully designed web site! 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. 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. Interesting. 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. All rights A lock ( During late summer and early fall, it will be necessary to move stored supplies from Cherry or Don Pedro Reservoirs into the pipeline. 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. This is the best one out there. Really appreciate the work you did to build this graph. Hetch Hetchy Reservoir in Yosemite National Park is seen in 2022. 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. John Muir and the the city wastes water, so it was a moot issue. California reservoir levels: . 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. The remaining 15 percent of water comes from runoff in the Alameda and Peninsula watersheds. The water travels through a series of pipelines before it reaches the Bay Area and blends with five local reservoirs. Hetch Hetchy is only one of nine reservoirs in the San Francisco Public Utility Commission's water system. 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. This hike follows the shoreline of the reservoir with moderate up and downhill hiking. How can I apply to SFPUC? If we reach 100% after the current rains and then it stops raining for the season, then our percentage will start going down. The main reason for the discrepancy, the department said, is that the focus of the atmospheric river was generally between the Golden Gate and Mount Lassen, meaning that the Feather River watershed received much more rainfall than the Shasta Lake drainage area. The captured water is piped 150 miles to the Bay Area. Central Valleyfarms have installed enough drip irrigationstrips to reach the moon and back, an improvement that also enables more efficient application of fertilizer and pesticides. You can also share a custom URL by clicking the Save URL button which will put the custom URL into the URL bar of your browser which you can then copy and share. United States. And while one storm didn't come close to ending the drought, some reservoirs in Northern California, especially those that fell right in the path of the storm, saw significant gains. If you click on the list button in the top right of the dashboard, it will show a list of the reservoirs (in order of size from largest to smallest) and you can check which ones you would like to display. What period does CA use for Historical Average? It will be very different depending on the period chosen. proposed as a source of water following the 1906 San Francisco A 1 week change would be interesting to show on each. window.addEventListener("orientationchange", function() { a broad meaning that had been previously applied in an Meant this comment for the integrated snowpack and reservoir view. scenic mountain valley in a national park. Current as of October 03, 2022 | Updated by . globe = document.getElementById('mekko'); and maybe another vertical axis to the right of that with reservoir capacity. https://engaging-data.com/ca-reservoir-level/ How do I contact support? Draining Hetch Hetchy without depriving Bay Area residents of Article X, Section 2 that requires diversions for all water In addition, San Francisco receives approximately one-tenth of its power from hydroelectricity generated by the gravity-driven flow from the Hetch Hetchy Reservoir. Major snowstorm might leave you stranded, New 101 express lanes opens in Bay Area. Take CA Highway 120 from the park toward Groveland. Related articles . We own and operate the Hetch Hetchy Regional Water System which serves 2.7 million customers. Reservoir levels rising. If a reservoir gets filled to 100% and more, the dam will break and many cities will get flooded, so the operators are careful. 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, Going to Tahoe this weekend? Awesome work!! Current conditions of LAKE OR RESERVOIR WATER SURFACE ELEVATION ABOVE NGVD 1929 and RESERVOIR STORAGE are available.
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