66-515: Lady Bird Lake (formerly, and still colloquially referred to as Town Lake ) is a river-like reservoir on the Colorado River in Austin , Texas , United States . The City of Austin created the reservoir in 1960 as a cooling pond for a new city power plant. The lake, which has a surface area of 416 acres (168 ha), is now used primarily for recreation and flood control . The reservoir
132-537: A block for migrating fish, trapping them in one area, producing food and a habitat for various water-birds. They can also flood various ecosystems on land and may cause extinctions. Creating reservoirs can alter the natural biogeochemical cycle of mercury . After a reservoir's initial formation, there is a large increase in the production of toxic methylmercury (MeHg) via microbial methylation in flooded soils and peat. MeHg levels have also been found to increase in zooplankton and in fish. Dams can severely reduce
198-815: A chain up the valley. Coastal reservoirs are fresh water storage reservoirs located on the sea coast near a river mouth to store the flood water of a river. As the land-based reservoir construction is fraught with substantial land submergence, coastal reservoirs are preferred economically and technically since they do not use scarce land area. Many coastal reservoirs were constructed in Asia and Europe. Saemanguem in South Korea, Marina Barrage in Singapore, Qingcaosha in China, and Plover Cove in Hong Kong are
264-761: A complete circuit around Lady Bird Lake. It is one of the oldest urban Texas hike and bike paths. The trail is the longest trail designed for non-motorized traffic maintained by the City of Austin Parks and Recreation Department. A local nonprofit, The Trail Conservancy , is the Trail's private steward and has made Trail-wide improvements by adding user amenities and infrastructure including trailheads and lakefront gathering areas, locally-designed jewel box restrooms, exercise equipment, as well as doing trailwide ecological restoration work on an ongoing basis. The Butler Trail loop
330-658: A conventional oil-fired thermal generation plant. For instance, In 1990, the impoundment behind the Balbina Dam in Brazil (inaugurated in 1987) had over 20 times the impact on global warming than would generating the same power from fossil fuels, due to the large area flooded per unit of electricity generated. Another study published in the Global Biogeochemical Cycles also found that newly flooded reservoirs released more carbon dioxide and methane than
396-533: A drop of water seep into the ocean without benefiting mankind." He created the reservoir named Parakrama Samudra ("sea of King Parakrama"). Vast artificial reservoirs were also built by various ancient kingdoms in Bengal, Assam, and Cambodia. Many dammed river reservoirs and most bank-side reservoirs are used to provide the raw water feed to a water treatment plant which delivers drinking water through water mains. The reservoir does not merely hold water until it
462-540: A few lengths of concrete and a boardwalk on the South-side of the lake. A pedestrian bridge incorporated into the trail bridges Barton Creek. The Roberta Crenshaw Pedestrian Walkway spans Lady Bird Lake beneath MoPac Boulevard and provides the trail's westernmost crossing of Lady Bird Lake. The trail encompasses the Lou Neff Point Gazebo at the confluence of Barton Creek and Lady Bird Lake. It
528-525: A few such coastal reservoirs. Where water is pumped or siphoned from a river of variable quality or size, bank-side reservoirs may be built to store the water. Such reservoirs are usually formed partly by excavation and partly by building a complete encircling bund or embankment , which may exceed 6 km (4 miles) in circumference. Both the floor of the reservoir and the bund must have an impermeable lining or core: initially these were often made of puddled clay , but this has generally been superseded by
594-477: A former Austin mayor and his wife, was paved to create a boardwalk. On February 5, 2024, members of the Austin Police Department responded to the 300 block of West Cesar Chavez Street, where first responders recovered a dead body that had been discovered by civilians earlier, following a series of four other bodies recovered from the lake in 2023. Lady Bird Lake is a major recreation area for
660-455: A high-level reservoir is filled with water using high-performance electric pumps at times when electricity demand is low, and then uses this stored water to generate electricity by releasing the stored water into a low-level reservoir when electricity demand is high. Such systems are called pump-storage schemes. Reservoirs can be used in a number of ways to control how water flows through downstream waterways: Reservoirs can be used to balance
726-570: A loss in both quantity and quality of water necessary for maintaining ecological balance and pose a risk of increasing severity and duration of droughts due to climate change. In summary, they consider it a misadaptation to climate change. Proponents of reservoirs or substitution reserves, on the other hand, see them as a solution for sustainable agriculture while waiting for a truly durable agricultural model. Without such reserves, they fear that unsustainable imported irrigation will be inevitable. They believe that these reservoirs should be accompanied by
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#1732783930486792-419: A narrow valley or canyon may cover relatively little vegetation, while one situated on a plain may flood a great deal of vegetation. The site may be cleared of vegetation first or simply flooded. Tropical flooding can produce far more greenhouse gases than in temperate regions. The following table indicates reservoir emissions in milligrams per square meter per day for different bodies of water. Depending upon
858-611: A reservoir is called the "conservation pool". In the United Kingdom, "top water level" describes the reservoir full state, while "fully drawn down" describes the minimum retained volume. There is a wide variety of software for modelling reservoirs, from the specialist Dam Safety Program Management Tools (DSPMT) to the relatively simple WAFLEX , to integrated models like the Water Evaluation And Planning system (WEAP) that place reservoir operations in
924-530: A result, the lake serves as a popular recreational area for paddleboards , kayaks , canoes , dragon boats , and rowing shells . Austin's warm climate and the river's calm waters, nearly 6 miles (9.7 km) length and straight courses are especially popular with crew teams and clubs. Along with the University of Texas women's rowing team and coeducational club rowing team, who practice on Lady Bird Lake year-round, teams from other universities (including
990-740: A river valley, with the potential to wash away towns and villages and cause considerable loss of life, such as the devastation following the failure of containment at Llyn Eigiau which killed 17 people. (see also List of dam failures ) A notable case of reservoirs being used as an instrument of war involved the British Royal Air Force Dambusters raid on Germany in World War II (codenamed " Operation Chastise " ), in which three German reservoir dams were selected to be breached in order to damage German infrastructure and manufacturing and power capabilities deriving from
1056-579: A system of hike and bike trails along the shoreline of the lake. On July 26, 2007, the Austin City Council passed a resolution authorizing the renaming of the reservoir from Town Lake to Lady Bird Lake in honor of Lady Bird Johnson, who had died earlier that month. Johnson had declined the honor of having the lake renamed for her while she was alive. In renaming the lake, the City Council recognized Johnson's dedication to beautifying
1122-582: A territorial project that unites all water stakeholders with the goal of preserving and enhancing natural environments. Two main types of reservoirs can be distinguished based on their mode of supply. Circa 3000 BC, the craters of extinct volcanoes in Arabia were used as reservoirs by farmers for their irrigation water. Dry climate and water scarcity in India led to early development of stepwells and other water resource management techniques, including
1188-585: Is Red Bud Isle, a small island formed by the 1900 collapse of the McDonald Dam that serves as a recreation area with a dog park and access to the lake for canoeing and fishing. Swimming in Lady Bird Lake is illegal not due to poor water quality from the run-off from area streets, which is a false rumor, but rather due to several drownings as well as debris in the water from bridges and dams destroyed by floods in years past. The City of Austin enacted
1254-476: Is a natural lake whose level was raised by a low dam and into which the River Dee flows or discharges depending upon flow conditions, as part of the River Dee regulation system . This mode of operation is a form of hydraulic capacitance in the river system. Many reservoirs often allow some recreational uses, such as fishing and boating . Special rules may apply for the safety of the public and to protect
1320-484: Is a water reservoir for agricultural use. They are filled using pumped groundwater , pumped river water or water runoff and are typically used during the local dry season. This type of infrastructure has sparked an opposition movement in France, with numerous disputes and, for some projects, protests, especially in the former Poitou-Charentes region where violent demonstrations took place in 2022 and 2023. In Spain, there
1386-437: Is also used technically to refer to certain forms of liquid storage, such the "coolant reservoir" that captures overflow of coolant in an automobile's cooling system. Dammed reservoirs are artificial lakes created and controlled by a dam constructed across a valley and rely on the natural topography to provide most of the basin of the reservoir. These reservoirs can either be on-stream reservoirs , which are located on
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#17327839304861452-399: Is an enlarged lake behind a dam , usually built to store fresh water , often doubling for hydroelectric power generation . Reservoirs are created by controlling a watercourse that drains an existing body of water, interrupting a watercourse to form an embayment within it, excavating, or building any number of retaining walls or levees to enclose any area to store water. The term
1518-501: Is greater acceptance because all beneficiary users are involved in the implementation of the system. The specific debate about substitution reservoirs is part of a broader discussion related to reservoirs used for agricultural irrigation, regardless of their type, and a certain model of intensive agriculture. Opponents view these reservoirs as a monopolization of resources benefiting only a few, representing an outdated model of productive agriculture. They argue that these reservoirs lead to
1584-515: Is listed as 'Austin Art in Public Places'. Lady Bird Lake has been stocked with several species of fish intended to improve the utility of the reservoir for recreational fishing. The predominant fish species in Lady Bird Lake are largemouth bass , catfish , carp , and sunfish . Fishing is regulated, requiring a fishing license, and daily bag and length limits apply for most species. A ban on
1650-853: Is named in honor of former First Lady of the United States Lady Bird Johnson . Lady Bird Lake is the easternmost lake of a chain of reservoirs on the river, which is completely located in Texas, and should not be confused with the larger Colorado River located in the Southwestern United States . This chain, known locally as the Texas Highland Lakes , also includes Lake Buchanan , Inks Lake , Lake LBJ , Lake Marble Falls , Lake Travis , and Lake Austin . The City of Austin constructed Longhorn Dam in 1960 to form Town Lake. The city needed
1716-466: Is needed: it can also be the first part of the water treatment process. The time the water is held before it is released is known as the retention time . This is a design feature that allows particles and silts to settle out, as well as time for natural biological treatment using algae , bacteria and zooplankton that naturally live in the water. However natural limnological processes in temperate climate lakes produce temperature stratification in
1782-536: Is now used by the Aquarius Golf Club. Service reservoirs perform several functions, including ensuring sufficient head of water in the water distribution system and providing water capacity to even-out peak demand from consumers, enabling the treatment plant to run at optimum efficiency. Large service reservoirs can also be managed to reduce the cost of pumping by refilling the reservoir at times of day when energy costs are low. An irrigation reservoir
1848-419: Is stored in the reservoir. Any excess water can be spilled via a specifically designed spillway. Stored water may be piped by gravity for use as drinking water , to generate hydro-electricity or to maintain river flows to support downstream uses. Occasionally reservoirs can be managed to retain water during high rainfall events to prevent or reduce downstream flooding. Some reservoirs support several uses, and
1914-473: Is the portion of the reservoir that can be used for flood control, power production, navigation , and downstream releases. In addition, a reservoir's "flood control capacity" is the amount of water it can regulate during flooding. The "surcharge capacity" is the capacity of the reservoir above the spillway crest that cannot be regulated. In the United States, the water below the normal maximum level of
1980-452: The Ruhr and Eder rivers. The economic and social impact was derived from the enormous volumes of previously stored water that swept down the valleys, wreaking destruction. This raid later became the basis for several films. All reservoirs will have a monetary cost/benefit assessment made before construction to see if the project is worth proceeding with. However, such analysis can often omit
2046-497: The University of Wisconsin , the University of Chicago , the University of Oklahoma , and the University of Nebraska ) train on Lady Bird Lake during Christmas holidays and spring breaks . Other water sports along the shores of the lake include swimming in Deep Eddy Pool , the oldest swimming pool in Texas, and Barton Springs Pool , a natural pool on Barton Creek which flows into Lady Bird Lake. Below Tom Miller Dam
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2112-673: The 1800s, most of which are lined with brick. A good example is the Honor Oak Reservoir in London, constructed between 1901 and 1909. When it was completed it was said to be the largest brick built underground reservoir in the world and it is still one of the largest in Europe. This reservoir now forms part of the southern extension of the Thames Water Ring Main . The top of the reservoir has been grassed over and
2178-537: The City of Austin. The lake's banks are bounded by the Ann and Roy Butler Hike-and-Bike Trail, and businesses offer recreational watercraft services along the lakefront portion of the trail. Austin's largest downtown park, Zilker Park , is adjacent to the lake, and Barton Springs , a major attraction for swimmers, flows into the lake. The City of Austin prohibits the operation of most motorized watercraft on Lady Bird Lake. As
2244-731: The Meroitic town of Butana . The Hafirs catch the water during rainy seasons in order to ensure water is available for several months during dry seasons to supply drinking water, irrigate fields and water cattle. The Great Reservoir near the Lion Temple in Musawwarat es-Sufra is a notable hafir in Kush. In Sri Lanka , large reservoirs were created by ancient Sinhalese kings in order to store water for irrigation. The famous Sri Lankan king Parākramabāhu I of Sri Lanka said "Do not let
2310-488: The US. The capacity, volume, or storage of a reservoir is usually divided into distinguishable areas. Dead or inactive storage refers to water in a reservoir that cannot be drained by gravity through a dam's outlet works , spillway, or power plant intake and can only be pumped out. Dead storage allows sediments to settle, which improves water quality and also creates an area for fish during low levels. Active or live storage
2376-535: The area flooded versus power produced, a reservoir built for hydro- electricity generation can either reduce or increase the net production of greenhouse gases when compared to other sources of power. A study for the National Institute for Research in the Amazon found that hydroelectric reservoirs release a large pulse of carbon dioxide from decay of trees left standing in the reservoirs, especially during
2442-670: The ban in 1964, and the fine can be up to $ 500. For the first time in August 2019, a toxic blue-green algae was found in the lake and reportedly killed at least 5 dogs who were exposed. Music venues on the banks of Lady Bird Lake are home to a number of events year-round, including the Austin City Limits Music Festival in the fall, the Austin Reggae Festival and Spamarama in the spring, and many open-air concerts at Auditorium Shores on
2508-428: The base of the dam or some distance away. In a flat river valley a reservoir needs to be deep enough to create a head of water at the turbines; and if there are periods of drought the reservoir needs to hold enough water to average out the river's flow throughout the year(s). Run-of-the-river hydro in a steep valley with constant flow needs no reservoir. Some reservoirs generating hydroelectricity use pumped recharge:
2574-556: The building of a reservoir at Girnar in 3000 BC. Artificial lakes dating to the 5th century BC have been found in ancient Greece. The artificial Bhojsagar lake in present-day Madhya Pradesh state of India, constructed in the 11th century, covered 650 square kilometres (250 sq mi). The Kingdom of Kush invented the Hafir , a type of reservoir, during the Meroitic period . 800 ancient and modern hafirs have been registered in
2640-409: The consumption of fish caught in the lake was issued by the City of Austin in 1990, as a result of excessively high levels of chlordane found in the fish. Although the use of chlordane as a pesticide was banned in the United States in 1988, the chemical sticks strongly to soil particles and can continue to pollute groundwater for years after its application. The ban on the consumption of fish caught in
2706-442: The context of system-wide demands and supplies. In many countries large reservoirs are closely regulated to try to prevent or minimize failures of containment. While much of the effort is directed at the dam and its associated structures as the weakest part of the overall structure, the aim of such controls is to prevent an uncontrolled release of water from the reservoir. Reservoir failures can generate huge increases in flow down
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2772-561: The dam located at the narrowest practical point to provide strength and the lowest cost of construction. In many reservoir construction projects, people have to be moved and re-housed, historical artifacts moved or rare environments relocated. Examples include the temples of Abu Simbel (which were moved before the construction of the Aswan Dam to create Lake Nasser from the Nile in Egypt ),
2838-460: The developed world Naturally occurring lakes receive organic sediments which decay in an anaerobic environment releasing methane and carbon dioxide . The methane released is approximately 8 times more potent as a greenhouse gas than carbon dioxide. As a human-made reservoir fills, existing plants are submerged and during the years it takes for this matter to decay, will give off considerably more greenhouse gases than lakes do. A reservoir in
2904-507: The downstream river to maintain river quality, support fisheries, to maintain downstream industrial and recreational uses or for a range of other purposes. Such releases are known as compensation water . The units used for measuring reservoir areas and volumes vary from country to country. In most of the world, reservoir areas are expressed in square kilometers; in the United States, acres are commonly used. For volume, either cubic meters or cubic kilometers are widely used, with acre-feet used in
2970-440: The environmental impacts of dams and the reservoirs that they contain. Some impacts, such as the greenhouse gas production associated with concrete manufacture, are relatively easy to estimate. Other impacts on the natural environment and social and cultural effects can be more difficult to assess and to weigh in the balance but identification and quantification of these issues is now commonly required in major construction projects in
3036-499: The first decade after flooding. This elevates the global warming impact of the dams to levels much higher than would occur by generating the same power from fossil fuels . According to the World Commission on Dams report (Dams And Development), when the reservoir is relatively large and no prior clearing of forest in the flooded area was undertaken, greenhouse gas emissions from the reservoir could be higher than those of
3102-413: The flow in highly managed systems, taking in water during high flows and releasing it again during low flows. In order for this to work without pumping requires careful control of water levels using spillways . When a major storm approaches, the dam operators calculate the volume of water that the storm will add to the reservoir. If forecast storm water will overfill the reservoir, water is slowly let out of
3168-580: The hydroelectric reservoirs there do emit greenhouse gases, it is on a much smaller scale than thermal power plants of similar capacity. Hydropower typically emits 35 to 70 times less greenhouse gases per TWh of electricity than thermal power plants. A decrease in air pollution occurs when a dam is used in place of thermal power generation, since electricity produced from hydroelectric generation does not give rise to any flue gas emissions from fossil fuel combustion (including sulfur dioxide , nitric oxide and carbon monoxide from coal ). Dams can produce
3234-500: The lake and her efforts to create a recreational trail system around the lake's shoreline. In 2009, non-profit organization Keep Austin Beautiful launched "Clean Lady Bird Lake". The program mobilizes thousands of community volunteers annually to conduct large-scale cleanups along the lake every other month and targeted cleanups throughout the year. In 2014, a one-mile stretch of the Ann and Roy Butler Hike-and-Bike Trail, named after
3300-613: The lake was finally lifted in 1999. The first water treatment facility in the City of Austin, the Thomas C. Green Water Treatment Plant , was built in 1925 to treat water from the Colorado River. The plant occupied 6 acres (2.4 ha) just west of the principal downtown business district. The water treatment facility was decommissioned in late 2008. Reservoir A reservoir ( / ˈ r ɛ z ər v w ɑːr / ; from French réservoir [ʁezɛʁvwaʁ] )
3366-625: The lake. During his two terms in office (1971–75), the Mayor of Austin , Roy Butler , led the Austin City Council to establish the Town Lake Beautification Committee, and he appointed Lady Bird Johnson as the project's honorary chairman. Johnson's involvement brought attention and money (including $ 19,000 of her own) to the Town Lake project, allowing for the planting of hundreds of shrubs and trees. The city also built
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#17327839304863432-432: The landscape is relatively flat. Other service reservoirs can be storage pools, water tanks or sometimes entirely underground cisterns , especially in more hilly or mountainous country. Modern reserviors will often use geomembrane liners on their base to limit seepage and/or as floating covers to limit evaporation, particularly in arid climates. In the United Kingdom, Thames Water has many underground reservoirs built in
3498-470: The modern use of rolled clay. The water stored in such reservoirs may stay there for several months, during which time normal biological processes may substantially reduce many contaminants and reduce turbidity . The use of bank-side reservoirs also allows water abstraction to be stopped for some time, for instance when the river is unacceptably polluted or when flow conditions are very low due to drought . The London water supply system exhibits one example of
3564-609: The new top water level exceeds the watershed height on one or more of the feeder streams such as at Llyn Clywedog in Mid Wales . In such cases additional side dams are required to contain the reservoir. Where the topography is poorly suited to forming a single large reservoir, a number of smaller reservoirs may be constructed in a chain, as in the River Taff valley where the Llwyn-on , Cantref and Beacons Reservoirs form
3630-415: The operating rules may be complex. Most modern reservoirs have a specially designed draw-off tower that can discharge water from the reservoir at different levels, both to access water as the water level falls, and to allow water of a specific quality to be discharged into the downstream river as "compensation water": the operators of many upland or in-river reservoirs have obligations to release water into
3696-428: The original streambed of the downstream river and are filled by creeks , rivers or rainwater that runs off the surrounding forested catchments, or off-stream reservoirs , which receive diverted water from a nearby stream or aqueduct or pipeline water from other on-stream reservoirs. Dams are typically located at a narrow part of a downstream of a natural basin. The valley sides act as natural walls, with
3762-481: The pre-flooded landscape, noting that forest lands, wetlands, and preexisting water features all released differing amounts of carbon dioxide and methane both pre- and post-flooding. The Tucuruí Dam in Brazil (completed in 1984) had only 0.4 times the impact on global warming than would generating the same power from fossil fuels. A two-year study of carbon dioxide and methane releases in Canada concluded that while
3828-437: The quality of the water and the ecology of the surrounding area. Many reservoirs now support and encourage less formal and less structured recreation such as natural history , bird watching , landscape painting , walking and hiking , and often provide information boards and interpretation material to encourage responsible use. Water falling as rain upstream of the reservoir, together with any groundwater emerging as springs,
3894-464: The relocation of the village of Capel Celyn during the construction of Llyn Celyn , and the relocation of Borgo San Pietro of Petrella Salto during the construction of Lake Salto . Construction of a dammed reservoir will usually require the river to be diverted during part of the build, often through a temporary tunnel or by-pass channel. In hilly regions, reservoirs are often constructed by enlarging existing lakes. Sometimes in such reservoirs,
3960-638: The reservoir prior to, and during, the storm. If done with sufficient lead time, the major storm will not fill the reservoir and areas downstream will not experience damaging flows. Accurate weather forecasts are essential so that dam operators can correctly plan drawdowns prior to a high rainfall event. Dam operators blamed a faulty weather forecast on the 2010–2011 Queensland floods . Examples of highly managed reservoirs are Burrendong Dam in Australia and Bala Lake ( Llyn Tegid ) in North Wales . Bala Lake
4026-650: The reservoir to serve as a cooling pond for the Holly Street Power Plant , which operated from 1960 until 2007. Before 1971, the shoreline of Town Lake was mostly a mixture of weeds, unkempt bushes, and trash. Local television station KTBC referred to the lake as an "eyesore". Some concerned Austinites led small projects to clean up the lake. Roberta Crenshaw , chair of the Austin Board of Parks and Recreation, purchased nearly 400 trees and shrubs in an effort to spearhead parkland development around
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#17327839304864092-549: The south bank and Fiesta Gardens on the north bank. The Austin Aqua Festival was held on the shores of Lady Bird Lake from 1962 until 1998. The late Austin resident and blues guitar legend, Stevie Ray Vaughan played a number of concerts at Auditorium Shores and is honored with a memorial statue on the south bank. The Ann and Roy Butler Hike-and-Bike Trail, formerly the Town Lake Hike and Bike Trail, creates
4158-499: The use of bank-side storage: here water is taken from the River Thames and River Lee into several large Thames-side reservoirs, such as Queen Mary Reservoir that can be seen along the approach to London Heathrow Airport . Service reservoirs store fully treated potable water close to the point of distribution. Many service reservoirs are constructed as water towers , often as elevated structures on concrete pillars where
4224-412: The water, which tends to partition some elements such as manganese and phosphorus into deep, cold anoxic water during the summer months. In the autumn and winter the lake becomes fully mixed again. During drought conditions, it is sometimes necessary to draw down the cold bottom water, and the elevated levels of manganese in particular can cause problems in water treatment plants. In 2005, about 25% of
4290-476: The world's 33,105 large dams (over 15 metres in height) were used for hydroelectricity. The U.S. produces 3% of its electricity from 80,000 dams of all sizes. An initiative is underway to retrofit more dams as a good use of existing infrastructure to provide many smaller communities with a reliable source of energy. A reservoir generating hydroelectricity includes turbines connected to the retained water body by large-diameter pipes. These generating sets may be at
4356-413: Was completed in 2014 with the public-private partnership 1-mile Boardwalk at Lady Bird Lake project, which was spearheaded by The Trail Conservancy. Construction on the $ 28 million project was completed during October 2012 – June 2014. The trail is 10.1 miles (16.3 km) long and mostly flat, with 97.5% of it at less than an 8% grade. The trail's surface is smooth and is mostly crushed granite except for
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