127-658: The Clinch River Nuclear Site ( CRNS ) is a project site owned by the Tennessee Valley Authority (TVA). It was originally the site of the Clinch River Breeder Reactor Project . In February 2022, the site was announced as the first location of a small modular reactor as part of the TVA's New Nuclear Program, which was approved the same year. In August 2022, TVA announced a signed agreement with GE-Hitachi to plan and license
254-535: A BWRX-300 small modular reactor at the site. Tennessee Valley Authority The Tennessee Valley Authority ( TVA ) is a federally owned electric utility corporation in the United States . TVA's service area covers all of Tennessee , portions of Alabama , Mississippi , and Kentucky , and small areas of Georgia , North Carolina , and Virginia . While owned by the federal government , TVA receives no taxpayer funding and operates similarly to
381-530: A library service was instituted for this area. The professional staff at headquarters were generally composed of experts from outside the region. By 1934, TVA employed more than 9,000 people. The workers were classified by the usual racial and gender lines of the region, which limited opportunities for minorities and women. TVA hired a few African Americans , generally restricted for janitorial or other low-level positions. TVA recognized labor unions ; its skilled and semi-skilled blue collar employees were unionized,
508-504: A "hidden loss" by preventing the creation of "factories and jobs that would have come into existence if the government had allowed the taxpayers to spend their money as they wished". Defenders note that TVA remains overwhelmingly popular in Tennessee among conservatives and liberals alike. Business historian Thomas McCraw concludes that Roosevelt "rescued the [power] industry from its own abuses" but "he might have done this much with
635-405: A breakthrough in an area known for corporations hostile to miners' and textile workers' unions. Women were excluded from construction work. Many local landowners were suspicious of government agencies, but TVA successfully introduced new agricultural methods into traditional farming communities by blending in and finding local champions. Tennessee farmers often rejected advice from TVA officials, so
762-547: A diverse portfolio that includes nuclear , coal-fired , natural gas -fired, hydroelectric , and renewable generation. TVA sells its power to 153 local power utilities, 58 direct-serve industrial and institutional customers, 7 federal installations, and 12 area utilities. In addition to power generation, TVA provides flood control with its 29 hydroelectric dams. Resulting lakes and other areas also allow for recreational activities. The TVA also provides navigation and land management along rivers within its region of operation, which
889-463: A faster rate than they are consumed". Solar power , wind power , hydroelectricity , geothermal energy, and biomass are widely agreed to be the main types of renewable energy. Renewable energy often displaces conventional fuels in four areas: electricity generation , hot water / space heating , transportation , and rural (off-grid) energy services. Although almost all forms of renewable energy cause much fewer carbon emissions than fossil fuels,
1016-437: A given time. Solar energy can only be captured during the day, and ideally in cloudless conditions. Wind power generation can vary significantly not only day-to-day, but even month-to-month. This poses a challenge when transitioning away from fossil fuels: energy demand will often be higher or lower than what renewables can provide. Both scenarios can cause electricity grids to become overloaded, leading to power outages . In
1143-633: A great deal less agitation and ill will". New Dealers hoped to build numerous other federal utility corporations around the country but were defeated by lobbyist and 1940 Republican presidential nominee Wendell Willkie and the conservative coalition in Congress. The valley authority model did not replace the limited-purpose water programs of the Bureau of Reclamation and the Army Corps of Engineers . However, it has been shown that in river policy,
1270-952: A large portion of the total, such as Kenya (43%) and Indonesia (5%). Technical advances may eventually make geothermal power more widely available. For example, enhanced geothermal systems involve drilling around 10 kilometres (6.2 mi) into the Earth, breaking apart hot rocks and extracting the heat using water. In theory, this type of geothermal energy extraction could be done anywhere on Earth. There are also other renewable energy technologies that are still under development, including enhanced geothermal systems , concentrated solar power , cellulosic ethanol , and marine energy . These technologies are not yet widely demonstrated or have limited commercialization. Some may have potential comparable to other renewable energy technologies, but still depend on further breakthroughs from research, development and engineering. Enhanced geothermal systems (EGS) are
1397-638: A more energy-dense biofuel like ethanol. Wood is the most significant biomass energy source as of 2012 and is usually sourced from a trees cleared for silvicultural reasons or fire prevention . Municipal wood waste – for instance, construction materials or sawdust – is also often burned for energy. The biggest per-capita producers of wood-based bioenergy are heavily forested countries like Finland, Sweden, Estonia, Austria, and Denmark. Bioenergy can be environmentally destructive if old-growth forests are cleared to make way for crop production. In particular, demand for palm oil to produce biodiesel has contributed to
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#17327726907511524-506: A new type of geothermal power which does not require natural hot water reservoirs or steam to generate power. Most of the underground heat within drilling reach is trapped in solid rocks, not in water. EGS technologies use hydraulic fracturing to break apart these rocks and release the heat they contain, which is then harvested by pumping water into the ground. The process is sometimes known as "hot dry rock" (HDR). Unlike conventional geothermal energy extraction, EGS may be feasible anywhere in
1651-653: A plan to meet the energy needs of the Tennessee Valley through 2020. In 1992 work resumed on Watts Bar Unit 1 , and the reactor began operation in May 1996. This was the last commercial nuclear reactor in the United States to begin operation in the 20th century. In 2002, TVA began work to restart Browns Ferry Unit 1 , the last of TVA's reactors that had been mothballed in 1985. This unit returned to service in 2007. In 2004, TVA implemented recommendations from
1778-491: A private for-profit company. It is headquartered in Knoxville, Tennessee , and is the sixth-largest power supplier and largest public utility in the country. The TVA was created by Congress in 1933 as part of President Franklin D. Roosevelt 's New Deal . Its initial purpose was to provide navigation , flood control , electricity generation , fertilizer manufacturing, regional planning , and economic development to
1905-422: A projected future increase in electrical consumption, TVA began constructing 500 kilovolt (kV) transmission lines, the first of which was placed into service on May 15, 1965. Electric rates were among the nation's lowest during this time and stayed low as TVA brought larger, more efficient generating units into service. Plants completed during this time included Paradise , Bull Run , and Nickajack Dam . Expecting
2032-841: A projection of further rapid increase in power demand. However, in the 1980s, it became increasingly evident that the agency had vastly overestimated the Valley's future energy needs, and rapid increases in construction costs and new regulations following the Three Mile Island accident posed additional obstacles to this undertaking. In 1981, the board voted to defer the Phipps Bend plant, as well as to slow down construction on all other projects. The Hartsville and Yellow Creek plants were cancelled in 1984 and Bellefonte in 1988. Citing safety concerns, all of TVAs five operating nuclear reactors were indefinitely shut down in 1985 with
2159-579: A proposal from industrialist Henry Ford to build a private dam and create a utility to modernize the Tennessee Valley. In 1930, Norris sponsored the Muscle Shoals Bill , which would have built a federal dam in the valley, but it was vetoed by President Herbert Hoover , who believed it to be socialistic . The idea behind the Muscle Shoals project became a core part of President Franklin D. Roosevelt 's New Deal program that created
2286-409: A range of construction strategies and technologies that aim to optimize the distribution of solar heat in a building. Examples include solar chimneys , orienting a building to the sun, using construction materials that can store heat , and designing spaces that naturally circulate air . From 2020 to 2022, solar technology investments almost doubled from USD 162 billion to USD 308 billion, driven by
2413-927: A small number of 115kV and 230kV lines in Alabama and Georgia that connect to Southern Company lines of the same voltage. TVA has conveyed approximately 485,420 acres (1,964.4 km ) of property for recreation and preservation purposes including public parks, public access areas and roadside parks, wildlife refuges, national parks and forests, and other camps and recreation areas, comprising approximately 759 different sites. Currently, TVA manages approximately 293,000 acres (1,190 km ) of Federally-owned land for public use. These lands are managed as either TVA Natural Areas or TVA Day-Use Recreation Areas. Natural Areas are smaller, ecologically or historically significant areas set aside for conservation, with some areas including hiking and walking trails. Day-Use Recreation Areas comprise approximately 80 different locations throughout
2540-702: A variety of environmental conditions and perform more efficiently allowing a greater proportion of photon energy to end up in the storage compounds, i.e., carbohydrates (rather than building and sustaining living cells). However, prominent research faces hurdles, Sun Catalytix a MIT spin-off stopped scaling up their prototype fuel-cell in 2012 because it offers few savings over other ways to make hydrogen from sunlight. Most new renewables are solar, followed by wind then hydro then bioenergy. Investment in renewables, especially solar, tends to be more effective in creating jobs than coal, gas or oil. Worldwide, renewables employ about 12 million people as of 2020, with solar PV being
2667-472: Is energy from renewable natural resources that are replenished on a human timescale . The most widely used renewable energy types are solar energy , wind power , and hydropower . Bioenergy and geothermal power are also significant in some countries. Some also consider nuclear power a renewable power source , although this is controversial. Renewable energy installations can be large or small and are suited for both urban and rural areas. Renewable energy
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#17327726907512794-456: Is thermal energy (heat) extracted from the Earth's crust . It originates from several different sources , of which the most significant is slow radioactive decay of minerals contained in the Earth's interior , as well as some leftover heat from the formation of the Earth . Some of the heat is generated near the Earth's surface in the crust, but some also flows from deep within the Earth from
2921-471: Is a more economical means of long-term renewable energy storage, in terms of capital expenditures compared to pumped hydroelectric or batteries. Solar power produced around 1.3 terrawatt-hours (TWh) worldwide in 2022, representing 4.6% of the world's electricity. Almost all of this growth has happened since 2010. Solar energy can be harnessed anywhere that receives sunlight; however, the amount of solar energy that can be harnessed for electricity generation
3048-537: Is a technology for generating electricity by mixing fresh water and salty sea water in large power cells. Most marine energy harvesting technologies are still at low technology readiness levels and not used at large scales. Tidal energy is generally considered the most mature, but has not seen wide deployment. The world's largest tidal power station is on Sihwa Lake , South Korea, which produces around 550 gigawatt-hours of electricity per year. Earth emits roughly 10 W of infrared thermal radiation that flows toward
3175-419: Is about 800 times denser than air , even a slow flowing stream of water, or moderate sea swell , can yield considerable amounts of energy. Water can generate electricity with a conversion efficiency of about 90%, which is the highest rate in renewable energy. There are many forms of water energy: Much hydropower is flexible, thus complementing wind and solar. In 2021, the world renewable hydropower capacity
3302-525: Is common in Iceland, or to generate electricity. At smaller scales, geothermal power can be generated with geothermal heat pumps , which can extract heat from ground temperatures of under 30 °C (86 °F), allowing them to be used at relatively shallow depths of a few meters. Electricity generation requires large plants and ground temperatures of at least 150 °C (302 °F). In some countries, electricity produced from geothermal energy accounts for
3429-401: Is enough fuel for breeder reactors to satisfy the world's energy needs for 5 billion years at 1983's total energy consumption rate, thus making nuclear energy effectively a renewable energy. In addition to seawater the average crustal granite rocks contain significant quantities of uranium and thorium with which breeder reactors can supply abundant energy for the remaining lifespan of the sun on
3556-533: Is governed by a nine-member part-time board of directors, nominated by the president of the United States and confirmed by the Senate . A minimum of seven of the directors are required to be residents of TVA's service area. The members select the chair from their number, and serve five-year terms. They receive annual stipends of $ 45,000 ($ 50,000 for the chair). The board members choose the TVA's chief executive officer . When their terms expire, directors may remain on
3683-518: Is influenced by weather conditions , geographic location and time of day. There are two mainstream ways of harnessing solar energy: solar thermal , which converts solar energy into heat; and photovoltaics (PV), which converts it into electricity. PV is far more widespread, accounting for around two thirds of the global solar energy capacity as of 2022. It is also growing at a much faster rate, with 170 GW newly installed capacity in 2021, compared to 25 GW of solar thermal. Passive solar refers to
3810-460: Is more valuable than VRE countries with large hydroelectric developments such as Canada and Norway are spending billions to expand their grids to trade with neighboring countries having limited hydro. Biomass is biological material derived from living, or recently living organisms. Most commonly, it refers to plants or plant-derived materials. As an energy source, biomass can either be used directly via combustion to produce heat, or converted to
3937-596: Is not possible to use or store excess electricity. Electrical energy storage is a collection of methods used to store electrical energy. Electrical energy is stored during times when production (especially from intermittent sources such as wind power , tidal power , solar power ) exceeds consumption, and returned to the grid when production falls below consumption. Pumped-storage hydroelectricity accounts for more than 85% of all grid power storage . Batteries are increasingly being deployed for storage and grid ancillary services and for domestic storage. Green hydrogen
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4064-520: Is often associated with unsustainable deforestation . As part of the global effort to limit climate change , most countries have committed to net zero greenhouse gas emissions . In practice, this means phasing out fossil fuels and replacing them with low-emissions energy sources. This much needed process, coined as "low-carbon substitutions" in contrast to other transition processes including energy additions, needs to be accelerated multiple times in order to successfully mitigating climate change. At
4191-501: Is often deployed together with further electrification . This has several benefits: electricity can move heat and vehicles efficiently and is clean at the point of consumption. Variable renewable energy sources are those that have a fluctuating nature, such as wind power and solar power. In contrast, controllable renewable energy sources include dammed hydroelectricity , bioenergy , or geothermal power . Renewable energy systems have rapidly become more efficient and cheaper over
4318-507: Is staffed 24 hours a day to spot any threats to TVA's 16,000 miles of transmission lines. Given continued economic pressure on the coal industry, the TVA board defied President Donald Trump and voted in February 2019 to close two aging coal plants, Paradise Unit 3 and Bull Run. TVA chief executive Bill Johnson said the decision was not about coal, per se, but rather "about keeping rates as low as feasible". They stated that decommissioning
4445-477: Is that the heated water can be stored until it is needed, eliminating the need for a separate energy storage system. Solar thermal power can also be converted to electricity by using the steam generated from the heated water to drive a turbine connected to a generator. However, because generating electricity this way is much more expensive than photovoltaic power plants, there are very few in use today. Humans have harnessed wind energy since at least 3500 BC. Until
4572-566: Is the fifth-largest river system in the United States, and assists governments and private companies on economic development projects. TVA's headquarters are located in Downtown Knoxville , with large administrative offices in Chattanooga (training/development; supplier relations; power generation and transmission) and Nashville (economic development) in Tennessee and Muscle Shoals, Alabama . TVA's headquarters were housed in
4699-662: Is to slow and eventually stop climate change , which is widely agreed to be caused mostly by greenhouse gas emissions . In general, renewable energy sources cause much lower emissions than fossil fuels. The International Energy Agency estimates that to achieve net zero emissions by 2050, 90% of global electricity generation will need to be produced from renewable sources. Renewables also cause much less air pollution than fossil fuels, improving public health, and are less noisy . The deployment of renewable energy still faces obstacles, especially fossil fuel subsidies , lobbying by incumbent power providers, and local opposition to
4826-517: Is under the jurisdiction of the SERC Reliability Corporation . Like most North American utilities, TVA uses a maximum transmission voltage of 500 kilovolts (kV), with lines carrying this voltage using bundled conductors with three conductors per phase. The vast majority of TVA's transmission lines carry 161 kV, with the company also operating a number of sub-transmission lines with voltages of 69 kV and 46kV. They also operate
4953-682: Is used by the National Nuclear Security Administration for nuclear weapons , where it is used to supercharge and boost the explosive yield of the U.S. nuclear arsenal . TVA owns and operates its own electric grid , which consists of approximately 16,200 miles (26,100 km) of lines, one of the largest grids in the United States. This grid is part of the Eastern Interconnection of the North American power transmission grid , and
5080-463: The 2023 United Nations Climate Change Conference , around three-quarters of the world's countries set a goal of tripling renewable energy capacity by 2030. The European Union aims to generate 40% of its electricity from renewables by the same year. Renewable energy is more evenly distributed around the world than fossil fuels, which are concentrated in a limited number of countries. It also brings health benefits by reducing air pollution caused by
5207-540: The Environmental Protection Agency (EPA), four state governments, and three environmental groups to drastically reduce pollution and carbon emissions. Under the terms of the agreement, TVA was required to retire at least 18 of its 59 coal-fired units by the end of 2018, and install scrubbers in several others or convert them to make them cleaner, at a cost of $ 25 billion, by 2021. As a result, TVA closed several of its coal-fired power plants in
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5334-494: The NASA Office of Science and Technology Policy examined the concept and concluded that with current and near-future technologies it would be economically uncompetitive. Collection of static electricity charges from water droplets on metal surfaces is an experimental technology that would be especially useful in low-income countries with relative air humidity over 60%. Breeder reactors could, in principle, depending on
5461-678: The Old Customs House in Knoxville from 1936 until 1976, when the current complex opened. The building is now operated as a museum and is listed on the National Register of Historic Places . The Tennessee Valley Authority Police is the primary law enforcement agency for the company. Initially part of the TVA, in 1994 the TVA Police was authorized as a federal law enforcement agency . The Tennessee Valley Authority
5588-550: The Public Utility Holding Company Act of 1935 (PUHCA). During his 1932 presidential campaign, Franklin D. Roosevelt expressed his belief that private utilities had "selfish purposes" and said, "Never shall the federal government part with its sovereignty or with its control of its power resources while I'm President of the United States." U.S. Senator George W. Norris of Nebraska also distrusted private utility companies, and in 1920 blocked
5715-718: The Tennessee Electric Power Company (TEPCO), Jo Conn Guild , was vehemently opposed to the creation of TVA, and with the help of attorney Wendell Willkie , challenged the constitutionality of the TVA Act in federal court. The U.S. Supreme Court again upheld the TVA Act, however, in its 1939 decision Tennessee Electric Power Company v. TVA . On August 16, 1939, TEPCO was forced to sell its assets, including Hales Bar Dam , Ocoee Dams 1 and 2 , Blue Ridge Dam and Great Falls Dam to TVA for $ 78 million (equivalent to $ 1.34 billion in 2023 ). In 1981
5842-566: The Tennessee Valley , a region that had suffered from lack of infrastructure and even more extensive poverty during the Great Depression than other regions of the nation. TVA was envisioned both as a power supplier and a regional economic development agency that would work to help modernize the region's economy and society. It later evolved primarily into an electric utility. It was the first large regional planning agency of
5969-571: The late December 2022 North American winter storm . As many as 24,000 Nashville Electric Service customers were without power, with thousands more from smaller distributors affected as well. TVA was heralded by New Dealers and the New Deal Coalition not only as a successful economic development program for a depressed area but also as a democratic nation-building effort overseas because of its alleged grassroots inclusiveness as articulated by director David E. Lilienthal . However,
6096-511: The mantle and core . Geothermal energy extraction is viable mostly in countries located on tectonic plate edges, where the Earth's hot mantle is more exposed. As of 2023, the United States has by far the most geothermal capacity (2.7 GW, or less than 0.2% of the country's total energy capacity ), followed by Indonesia and the Philippines. Global capacity in 2022 was 15 GW. Geothermal energy can be either used directly to heat homes, as
6223-473: The 1950s. In 1955 coal surpassed hydroelectricity as TVA's top generating source. On August 6, 1959, President Dwight D. Eisenhower signed into law an amendment to the TVA act, making the agency self-financing. During the 1950s, TVA's generating capacity nearly quadrupled. The 1960s were years of further unprecedented economic growth in the Tennessee Valley. Capacity growth during this time slowed, but ultimately increased 56% between 1960 and 1970. To handle
6350-564: The 2010s, converting some to natural gas. These include John Sevier in 2012, Shawnee Unit 10 in 2014, Widows Creek in 2015, Colbert in 2016, Johnsonville and Paradise Units 1 and 2 in 2017, Allen in 2018, and Paradise Unit 3 in 2020. In 2018, TVA opened a new cybersecurity center in its downtown Chattanooga Office Complex. More than 20 Information Technology specialists monitor emails, Twitter feeds and network activity for cybersecurity threats and threats to grid security. Across TVA's digital platform, two billion activities occur each day. The center
6477-400: The 20th century, it was primarily used to power ships, windmills and water pumps. Today, the vast majority of wind power is used to generate electricity using wind turbines. Modern utility-scale wind turbines range from around 600 kW to 9 MW of rated power. The power available from the wind is a function of the cube of the wind speed, so as wind speed increases, power output increases up to
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#17327726907516604-844: The Eastern District of Tennessee . The initial spill resulted in no injuries or deaths, but several of the employees of an engineering firm hired by TVA to clean up the spill developed illnesses, some of which were fatal, and in November 2018, a federal jury ruled that the contractor did not properly inform the workers about the dangers of exposure to coal ash and had failed to provide them with necessary personal protective equipment. In 2009, to gain more access to sustainable, green energy, TVA signed 20-year power purchase agreements with Maryland-based CVP Renewable Energy Co. and Chicago-based Invenergy Wind LLC for electricity generated by wind farms. In April 2011, TVA reached an agreement with
6731-741: The New Dealers' spending mood by expanding the Army Corps' flood control program. They also helped defeat further valley authorities, the most promising of the New Deal water policy reforms. When Democrats after 1945 began proclaiming the Tennessee Valley Authority as a model for countries in the developing world to follow, conservative critics charged that it was a top-heavy, centralized, technocratic venture that displaced locals and did so in insensitive ways. Thus, when
6858-704: The Reservoir Operations Study (ROS) on how it operates the Tennessee River system. The following year, the company announced its intention to construct an Advanced Pressurized Water Reactor at its Bellefonte site in Alabama, filing the necessary applications in November 2007. This proposal was gradually trimmed over the following years, and essentially voided by 2016. In October 2007, construction resumed on Watts Bar Unit 2 . which began commercial operation in October 2016. Watts Bar Unit 2
6985-641: The TVA Board of Directors broke with previous tradition and took a hard line against white-collar unions during contract negotiations. As a result, a class action suit was filed in 1984 in U.S. District Court charging the agency with sex discrimination under Title VII of the Civil Rights Act of 1964 based on the large number of women in one of the pay grades negatively impacted by the new contract. TVA reached an out-of-court settlement in 1987, in which they agreed to contract modifications and paid
7112-714: The TVA Board voted to approve an advanced approach of nuclear energy technology with an estimated $ 200 million investment, known as the New Nuclear Program (NNP) in February 2022. This would promote the construction of new nuclear power facilities, particularly small modular reactors , with the first facility being constructed in partnership with Oak Ridge National Laboratory at the Clinch River Nuclear Site in Oak Ridge . On December 23, 2022, TVA had several hours of rolling blackouts due to
7239-419: The TVA chairman and another board member, saying they were overpaid and had outsourced 200 high-tech jobs. The move came after U.S. Tech Workers, a nonprofit that works to limit visas given to foreign technology workers, criticized the TVA for laying off its own workers and replacing them with contractors using foreign workers with H-1B visas . Citing its aspiration to reach net-zero carbon emissions in 2050,
7366-477: The TVA forced residents to sell their property at values less than the fair market value , and indirectly destabilized the real estate market for farmland. Some displaced residents committed suicide, unable to bear the events. On some occasions, land that TVA had acquired through eminent domain that was expected to be flooded by reservoirs was not flooded, and was instead given away to private developers. The 1960 film Wild River , directed by Elia Kazan , tells
7493-481: The TVA was controversial early on, as some believed its creation was an overreach by the federal government. Supporters of TVA note that the agency's management of the Tennessee River system without appropriated federal funding saves federal taxpayers millions of dollars annually. Opponents, such as Dean Russell in The TVA Idea, in addition to condemning the project as being socialistic , argued that TVA created
7620-492: The TVA. The agency was initially tasked with modernizing the region, using experts and electricity to combat human and economic problems. TVA developed fertilizers, and taught farmers ways to improve crop yields. In addition, it helped replant forests, control forest fires , and improve habitats for fish and wildlife. The Authority hired many of the area's unemployed for a variety of jobs: they conducted conservation , economic development , and social programs . For instance,
7747-721: The Tennessee River for electricity generation and navigation improvements. The National Defense Act of 1916 , signed into law by President Woodrow Wilson , authorized the construction of a hydroelectric dam on the Tennessee River in Muscle Shoals, Alabama , for the purpose of producing nitrates for ammunition. During the 1920s and the 1930s, Americans began to support the idea of public ownership of utilities , particularly hydroelectric power facilities. Many believed privately owned power companies were charging too much for power, did not employ fair operating practices, and were subject to abuse by their owners, utility holding companies, at
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#17327726907517874-435: The Tennessee Valley Authority. Even by Depression standards, the Tennessee Valley was in dire economic straits in 1933. Thirty percent of the population was affected by malaria . The average income in the rural areas was $ 639 per year (equivalent to $ 11,947 in 2024), with some families surviving on as little as $ 100 per year (equivalent to $ 1,870 in 2023). Much of the land had been exhausted by poor farming practices, and
8001-609: The Tennessee Valley largely concentrated on or near TVA reservoirs that include water access points, campgrounds, hiking trails, fishing piers, and equestrian facilities. TVA operates an economic development organization that works with companies and economic development agencies throughout the Tennessee Valley to create jobs via private investments. They also work with businesses to help them choose locations for facilities and expand existing facilities. Services provided include assistance with site selection, employee recruitment and training, and research. A total of seven sites throughout
8128-402: The U.S. federal government, and remains the largest. Under the leadership of David E. Lilienthal , the TVA also became the global model for the United States' later efforts to help modernize agrarian societies in the developing world . The TVA historically has been documented as a success in its efforts to modernize the Tennessee Valley and helping to recruit new employment opportunities to
8255-563: The United States and the third largest nuclear power fleet, with seven units at three sites . In addition, they also operate four coal-fired power plants , 29 hydroelectric dams, nine simple-cycle natural gas combustion turbine plants, nine combined cycle gas plants, 1 pumped storage hydroelectric plant, 1 wind energy site, and 14 solar energy sites. In fiscal year 2020, nuclear generation made up about 41% of TVA's total energy production, natural gas 26%, coal 14%, hydroelectric 13%, and wind and solar 3%. TVA purchases about 15% of
8382-408: The Valley are certified by TVA as megasites , which contain a minimum of 1,000 acres (4.0 km ), and have access to an Interstate Highway and the potential for rail service, and environmental impact study, and contain or have the potential to contain direct-serve industrial customers. In the late 19th century, the Army Corps of Engineers first recognized a number of potential dam sites along
8509-401: The Valley's electric power needs to continue to grow, TVA began building nuclear power plants in 1966 as a new source of power. The following year, TVA began work on the construction of Tellico Dam , which had been initially conceived in the 1930s and would later become its most controversial project. During the 1970s significant changes occurred in the economy of the Tennessee Valley and
8636-400: The agency's five nuclear reactors return to service, and the institution of a rate freeze that continued for ten years. As the electric-utility industry moved toward restructuring and deregulation , TVA began preparing for competition. It cut operating costs by nearly $ 800 million a year, reduced its workforce by more than half, increased the generating capacity of its plants, and developed
8763-501: The board until the end of the current congressional session (typically in December) or until their successors take office, whichever comes first. The current board members as of January 4, 2023: President Biden has nominated the following to fill a seat on the board. They await Senate confirmation. With a generating capacity of approximately 35 gigawatts (GW), TVA has the sixth highest generation capacity of any utility company in
8890-446: The burning of fossil fuels. The potential worldwide savings in health care costs have been estimated at trillions of dollars annually. The two most important forms of renewable energy, solar and wind, are intermittent energy sources : they are not available constantly, resulting in lower capacity factors . In contrast, fossil fuel power plants are usually able to produce precisely the amount of energy an electricity grid requires at
9017-778: The cold outer space. Solar energy hits the surface and atmosphere of the earth and produces heat. Using various theorized devices like emissive energy harvester (EEH) or thermoradiative diode, this energy flow can be converted into electricity. In theory, this technology can be used during nighttime. Producing liquid fuels from oil-rich (fat-rich) varieties of algae is an ongoing research topic. Various microalgae grown in open or closed systems are being tried including some systems that can be set up in brownfield and desert lands. There have been numerous proposals for space-based solar power , in which very large satellites with photovoltaic panels would be equipped with microwave transmitters to beam power back to terrestrial receivers. A 2024 study by
9144-666: The company's nuclear reactor fleet. This includes fuel for the Browns Ferry Nuclear Plant , fuel handling equipment upgrades across the fleet and steam generator replacements at the Watts Bar Nuclear Plant . Framatome will provide its state-of-the-art ATRIUM 11 fuel for the three boiling water reactors at Browns Ferry . This contract makes TVA the third U.S. utility to switch to the ATRIUM 11 fuel design. On August 3, 2020, President Trump fired
9271-554: The crops used to produce bioethanol and biodiesel are grown specifically for this purpose, although used cooking oil accounted for 14% of the oil used to produce biodiesel as of 2015. The biomass used to produce biofuels varies by region. Maize is the major feedstock in the United States, while sugarcane dominates in Brazil. In the European Union, where biodiesel is more common than bioethanol, rapeseed oil and palm oil are
9398-412: The deforestation of tropical rainforests in Brazil and Indonesia. In addition, burning biomass still produces carbon emissions, although much less than fossil fuels (39 grams of CO 2 per megajoule of energy, compared to 75 g/MJ for fossil fuels). Some biomass sources are unsustainable at current rates of exploitation (as of 2017). Biofuels are primarily used in transportation, providing 3.5% of
9525-402: The expense of consumers. The concept of government-owned generation facilities selling to publicly owned distribution utilities was controversial, and remains so today. The private sector practice of forming utility holding companies had resulted in them controlling 94 percent of generation by 1921, and they were essentially unregulated. In an effort to change this, Congress and Roosevelt enacted
9652-585: The fastest-growing renewable energy technology. It is cheap, low-maintenance and scalable; adding to an existing PV installation as demanded arises is simple. Its main disadvantage is its poor performance in cloudy weather. PV systems range from small, residential and commercial rooftop or building integrated installations, to large utility-scale photovoltaic power station . A household's solar panels can either be used for just that household or, if connected to an electrical grid, can be aggregated with millions of others. The first utility-scale solar power plant
9779-548: The fuel cycle employed, extract almost all of the energy contained in uranium or thorium , decreasing fuel requirements by a factor of 100 compared to widely used once-through light water reactors , which extract less than 1% of the energy in the actinide metal (uranium or thorium) mined from the earth. The high fuel-efficiency of breeder reactors could greatly reduce concerns about fuel supply, energy used in mining, and storage of radioactive waste . With seawater uranium extraction (currently too expensive to be economical), there
9906-690: The group $ 5 million (equivalent to $ 11.5 million in 2023 ), but denied wrongdoing. TVA has received criticism throughout its entire history for what some have perceived as excessive use of its authority of eminent domain and an unwillingness to compromise with landowners. All of TVA's hydroelectric projects were made possible through the use of eminent domain, and displaced more than 125,000 Tennessee Valley residents. Residents who initially refused to sell their land were often forced to do so via court orders and lawsuits. Many of these projects also inundated historic Native American sites and early Colonial -era settlements. Historians have claimed that
10033-744: The horizontal axis units currently in use. As offshore wind speeds average ~90% greater than that of land, offshore resources can contribute substantially more energy than land-stationed turbines. Investments in wind technologies reached USD 161 billion in 2020, with onshore wind dominating at 80% of total investments from 2013 to 2022. Offshore wind investments nearly doubled to USD 41 billion between 2019 and 2020, primarily due to policy incentives in China and expansion in Europe. Global wind capacity increased by 557 GW between 2013 and 2021, with capacity additions increasing by an average of 19% each year. Since water
10160-468: The intent of also controlling floods, greatly improved the lives of farmers and rural residents, making their lives easier and farms in the Tennessee Valley more productive. They also provided new employment opportunities to the poverty-stricken regions in the Valley. At the same time, however, they required the displacement of more than 125,000 valley residents or roughly 15,000 families, as well as some cemeteries and small towns, which caused some to oppose
10287-575: The investigation. In 1963, U.S. Senator and Republican presidential candidate Barry Goldwater was quoted in a Saturday Evening Post article by Stewart Alsop as saying, "You know, I think we ought to sell TVA." He had called for the sale to private companies of particular parts of the Authority, including its fertilizer production and steam-generation facilities, because "it would be better operated and would be of more benefit for more people if it were part of private industry." Goldwater's quotation
10414-537: The late 1940s and early 1950s, however. TVA was one of the first federal hydropower agencies, and was quickly hailed as a success. While most of the nation's major hydropower systems are federally managed today, other attempts to create similar regional corporate agencies have failed. The most notable was the proposed Columbia Valley Authority for the Columbia River in the Pacific Northwest , which
10541-408: The main feedstocks. China, although it produces comparatively much less biofuel, uses mostly corn and wheat. In many countries, biofuels are either subsidized or mandated to be included in fuel mixtures . There are many other sources of bioenergy that are more niche, or not yet viable at large scales. For instance, bioethanol could be produced from the cellulosic parts of crops, rather than only
10668-504: The main sequence of stellar evolution. Artificial photosynthesis uses techniques including nanotechnology to store solar electromagnetic energy in chemical bonds by splitting water to produce hydrogen and then using carbon dioxide to make methanol. Researchers in this field strived to design molecular mimics of photosynthesis that use a wider region of the solar spectrum, employ catalytic systems made from abundant, inexpensive materials that are robust, readily repaired, non-toxic, stable in
10795-456: The maximum output for the particular turbine. Areas where winds are stronger and more constant, such as offshore and high-altitude sites, are preferred locations for wind farms. Wind-generated electricity met nearly 4% of global electricity demand in 2015, with nearly 63 GW of new wind power capacity installed. Wind energy was the leading source of new capacity in Europe, the US and Canada, and
10922-472: The medium-term, this variability may require keeping some gas-fired power plants or other dispatchable generation on standby until there is enough energy storage, demand response , grid improvement, and/or baseload power from non-intermittent sources. In the long-term, energy storage is an important way of dealing with intermittency. Using diversified renewable energy sources and smart grids can also help flatten supply and demand. Sector coupling of
11049-501: The nation's largest electricity supplier. Even so, the demand for electricity was outstripping TVA's capacity to produce power from hydroelectric dams, and so TVA began to construct additional coal-fired plants. Political interference kept TVA from securing additional federal appropriations to do so, so it sought the authority to issue bonds. Several of TVA's coal-fired plants, including Johnsonville , Widows Creek , Shawnee , Kingston , Gallatin , and John Sevier , began operations in
11176-411: The nation, prompted by energy crises in 1973 and 1979 and accelerating fuel costs throughout the decade. The average cost of electricity in the Tennessee Valley increased fivefold from the early 1970s to the early 1980s. TVA's first nuclear reactor, Browns Ferry Unit 1 , began commercial operation on August 1, 1974. Between 1970 and 1974, TVA set out to construct a total of 17 nuclear reactors, due to
11303-426: The officials had to find leaders in the communities and convince them that crop rotation and the judicious application of fertilizers could restore soil fertility. Once they had convinced the leaders, the rest followed. TVA immediately embarked on the construction of several hydroelectric dams, with the first, Norris Dam in upper East Tennessee , breaking ground on October 1, 1933. These facilities, designed with
11430-479: The past 30 years. A large majority of worldwide newly installed electricity capacity is now renewable. Renewable energy sources, such as solar and wind power, have seen significant cost reductions over the past decade, making them more competitive with traditional fossil fuels. In most countries, photovoltaic solar or onshore wind are the cheapest new-build electricity. From 2011 to 2021, renewable energy grew from 20% to 28% of global electricity supply. Power from
11557-897: The planned nuclear plants put the agency in deep financial trouble. In an effort to restructure and improve efficiency and financial stability, TVA began shifting towards a more corporate environment in the latter 1980s. Marvin Travis Runyon , a former corporate executive in the automotive industry , became chairman of the TVA in January 1988, and pledged to stabilize the agency financially. During his four-year term he worked to reduce management layers, and reduced overhead costs by more than 30%, which required thousands of workers to be laid off and many operations transferred to private contractors. These moves resulted in cumulative savings and efficiency improvements of $ 1.8 billion (equivalent to $ 3.51 billion in 2023 ). His tenure also saw three of
11684-571: The power generation sector with other sectors may increase flexibility: for example the transport sector can be coupled by charging electric vehicles and sending electricity from vehicle to grid . Similarly the industry sector can be coupled by hydrogen produced by electrolysis, and the buildings sector by thermal energy storage for space heating and cooling. Building overcapacity for wind and solar generation can help ensure sufficient electricity production even during poor weather. In optimal weather, it may be necessary to curtail energy generation if it
11811-458: The power it sells from other power producers, which includes power from combined cycle natural gas plants, coal plants, and wind installations, and other renewables. The cost of Purchased Power is part of the "Fuel Cost Adjustment" (FCA) charge that is separate from the TVA Rate. In addition, the Watts Bar Nuclear Plant is the only facility in the country to industrially produce tritium , which
11938-488: The primary challenges for new developments. It is popular to repower old dams thereby increasing their efficiency and capacity as well as quicker responsiveness on the grid. Where circumstances permit existing dams such as the Russell Dam built in 1985 may be updated with "pump back" facilities for pumped-storage which is useful for peak loads or to support intermittent wind and solar power. Because dispatchable power
12065-658: The program was used as the basis for modernization programs in various parts of the third world during the Cold War , such as in the Mekong Delta in Vietnam , its failure brought a backlash of cynicism toward modernization programs that has persisted. In 1953, President Dwight D. Eisenhower referred to the TVA as an example of "creeping socialism". The following year, then-film actor and later 40th President Ronald Reagan began hosting General Electric Theater , which
12192-434: The projects, especially in rural areas. The projects also inundated several Native American archaeological sites, and graves were reinterred at new locations, along with new tombstones. The available electricity attracted new industries to the region, including textile mills , providing desperately needed jobs, many of which were filled by women. A few regions of the Tennessee Valley did not receive electricity until
12319-532: The region through power generation, flood control, navigation assistance, fertilizer manufacturing, and agricultural development. Since the Depression years, it has developed primarily into a power utility. Despite its shares being owned by the federal government, TVA operates like a private corporation, and receives no taxpayer funding. The TVA Act authorizes the company to use eminent domain . TVA provides electricity to approximately ten million people through
12446-509: The region. Historians have criticized its use of eminent domain and the displacement of over 125,000 Tennessee Valley residents to build the agency's infrastructure projects. The Tennessee Valley Authority is a government-owned corporation created by U.S. Code Title 16 , Chapter 12A, the Tennessee Valley Authority Act of 1933. It was initially founded as an agency to provide general economic development to
12573-459: The same time, and design and construction employment reached a total of 28,000. In its first eleven years, TVA constructed a total of 16 hydroelectric dams. During the war, the agency also provided 60% of the elemental phosphorus used in munitions, produced maps of approximately 500,000 square miles (1,300,000 km ) of foreign territory using aerial reconnaissance , and provided mobile housing for war workers. The largest project of this period
12700-585: The second largest in China. In Denmark, wind energy met more than 40% of its electricity demand while Ireland, Portugal and Spain each met nearly 20%. Globally, the long-term technical potential of wind energy is believed to be five times total current global energy production, or 40 times current electricity demand, assuming all practical barriers needed were overcome. This would require wind turbines to be installed over large areas, particularly in areas of higher wind resources, such as offshore, and likely also industrial use of new types of VAWT turbines in addition to
12827-527: The sector's increasing maturity and cost reductions, particularly in solar photovoltaic (PV), which accounted for 90% of total investments. China and the United States were the main recipients, collectively making up about half of all solar investments since 2013. Despite reductions in Japan and India due to policy changes and COVID-19 , growth in China, the United States, and a significant increase from Vietnam's feed-in tariff program offset these declines. Globally,
12954-418: The seed as is common today. Sweet sorghum may be a promising alternative source of bioethanol, due to its tolerance of a wide range of climates. Cow dung can be converted into methane. There is also a great deal of research involving algal fuel , which is attractive because algae is a non-food resource, grows around 20 times faster than most food crops, and can be grown almost anywhere. Geothermal energy
13081-565: The soil was eroded and depleted. Crop yields had fallen, reducing farm incomes. The best timber had been cut, and 10% of forests were lost to fires each year. President Franklin Delano Roosevelt signed the Tennessee Valley Authority Act (ch. 32, Pub. L. 73–17 , 48 Stat. 58 , enacted May 18, 1933 , codified as amended at 16 U.S.C. § 831 , et seq.), creating
13208-451: The solar sector added 714 gigawatts (GW) of solar PV and concentrated solar power (CSP) capacity between 2013 and 2021, with a notable rise in large-scale solar heating installations in 2021, especially in China, Europe, Turkey, and Mexico. A photovoltaic system , consisting of solar cells assembled into panels , converts light into electrical direct current via the photoelectric effect . PV has several advantages that make it by far
13335-551: The states includes regulation of streams and that controlling floods is required for keeping streams navigable; it also upheld the constitutionality of the TVA under the War Powers Clause , seeing its activities as a means of assuring the electric supply for the manufacture of munitions in the event of war. The argument before the court was that electricity generation was a by-product of navigation and flood control and therefore could be considered constitutional. The CEO of
13462-531: The story about a family forced to relocate from their land, which has been owned by their ancestors for generations, after TVA plans to construct a dam which will flood it. While fictional, the film depicts the real-life experiences of many people forced to give up their land to TVA to make way for hydroelectric projects, and was mostly inspired by the removal of families for the Norris Dam project. Renewable energy Renewable energy (or green energy )
13589-414: The strength of opposing interest groups also mattered. The TVA bill was able to attain passage because reformers like Norris skillfully coordinated action at potential choke points and weakened the already disorganized opponents among the electric power industry lobbyists. In 1936, after regrouping, opposing river lobbyists and members of congress who were part of the conservative coalition took advantage of
13716-513: The sun and wind accounted for most of this increase, growing from a combined 2% to 10%. Use of fossil energy shrank from 68% to 62%. In 2022, renewables accounted for 30% of global electricity generation and are projected to reach over 42% by 2028. Many countries already have renewables contributing more than 20% of their total energy supply, with some generating over half or even all their electricity from renewable sources. The main motivation to replace fossil fuels with renewable energy sources
13843-468: The technology employing the most at almost 4 million. However, as of February 2024, the world's supply of workforce for solar energy is lagging greatly behind demand as universities worldwide still produce more workforce for fossil fuels than for renewable energy industries. In 2021, China accounted for almost half of the global increase in renewable electricity. There are 3,146 gigawatts installed in 135 countries, while 156 countries have laws regulating
13970-407: The ten biggest solar power stations are in China, including the biggest, Golmud Solar Park in China. Unlike photovoltaic cells that convert sunlight directly into electricity, solar thermal systems convert it into heat. They use mirrors or lenses to concentrate sunlight onto a receiver, which in turn heats a water reservoir. The heated water can then be used in homes. The advantage of solar thermal
14097-501: The term is not synonymous with low-carbon energy . Some non-renewable sources of energy, such as nuclear power , generate almost no emissions, while some renewable energy sources can be very carbon-intensive, such as the burning of biomass if it is not offset by planting new plants. Renewable energy is also distinct from sustainable energy , a more abstract concept that seeks to group energy sources based on their overall permanent impact on future generations of humans. For example, biomass
14224-529: The two at Sequoyah coming back online three years later and Browns Ferry's three reactors coming back online in 1991, 1995 and 2007. Construction of the Tellico Dam raised political and environmental concerns, as laws had changed since early development in the valley. Scientists and other researchers had become more aware of the massive environmental effects of the dams and new lakes, and worried about preserving habitats and species. The Tellico Dam project
14351-643: The two plants would reduce its carbon output by about 4.4% annually. TVA announced in April 2021 plans to completely phase out coal power by 2035. The following month, the board voted to consider replacing almost all of their operating coal facilities with combined-cycle gas plants. Such plants considered for gas plant redevelopment include the Cumberland, Gallatin, Shawnee, and Kingston facilities. In early February 2020, TVA awarded an outside company, Framatome , several multi-million-dollar contracts for work across
14478-484: The use of land for renewable installations. Like all mining, the extraction of minerals required for many renewable energy technologies also results in environmental damage . In addition, although most renewable energy sources are sustainable , some are not. Renewable energy is usually understood as energy harnessed from continuously occurring natural phenomena. The International Energy Agency defines it as "energy derived from natural processes that are replenished at
14605-496: The war effort. However, the abundance of TVA power was one of the major factors in the decision by the U.S. Army to locate uranium enrichment facilities in Oak Ridge, Tennessee , for the world's first atomic bombs . This was part of an effort codenamed the Manhattan Project . By the end of World War II, TVA had completed a 650-mile (1,050 km) navigation channel the length of the Tennessee River and had become
14732-484: The world's transport energy demand in 2022, up from 2.7% in 2010. Biojet is expected to be important for short-term reduction of carbon dioxide emissions from long-haul flights. Aside from wood, the major sources of bioenergy are bioethanol and biodiesel . Bioethanol is usually produced by fermenting the sugar components of crops like sugarcane and maize , while biodiesel is mostly made from oils extracted from plants, such as soybean oil and corn oil . Most of
14859-502: The world, depending on the cost of drilling. EGS projects have so far primarily been limited to demonstration plants , as the technology is capital-intensive due to the high cost of drilling. Marine energy (also sometimes referred to as ocean energy) is the energy carried by ocean waves , tides , salinity , and ocean temperature differences . Technologies to harness the energy of moving water include wave power , marine current power , and tidal power . Reverse electrodialysis (RED)
14986-455: Was 1,360 GW. Only a third of the world's estimated hydroelectric potential of 14,000 TWh/year has been developed. New hydropower projects face opposition from local communities due to their large impact, including relocation of communities and flooding of wildlife habitats and farming land. High cost and lead times from permission process, including environmental and risk assessments, with lack of environmental and social acceptance are therefore
15113-522: Was built in 1982 in Hesperia, California by ARCO . The plant was not profitable and was sold eight years later. However, over the following decades, PV cells became significantly more efficient and cheaper. As a result, PV adoption has grown exponentially since 2010. Global capacity increased from 230 GW at the end of 2015 to 890 GW in 2021. PV grew fastest in China between 2016 and 2021, adding 560 GW, more than all advanced economies combined. Four of
15240-466: Was completed in 2015 at a cost of more than $ 1 billion, was the largest industrial spill in United States history, and considered one of the worst environmental disasters of all time. A 2009 report by engineering firm AECOM found a number of inadequate design factors of the ash pond were responsible for the spill, and in August 2012, TVA was found liable for the disaster by the U.S. District Court for
15367-646: Was initially delayed because of concern over the snail darter , a small ray-finned fish which had been discovered in the Little Tennessee River in 1973 and listed as an endangered species two years later. A lawsuit was filed under the Endangered Species Act and the U.S. Supreme Court ruled in favor of protecting the snail darter in Tennessee Valley Authority v. Hill in 1978. The project's main motive
15494-477: Was modeled off of TVA, but did not gain approval. In order to provide the power for essential industries during World War II , TVA engaged in one of the largest hydropower construction programs ever undertaken in the U.S. This was especially important for the energy-intensive aluminum industry, which was used in airplanes and munitions. By early 1942, when the effort reached its peak, 12 hydroelectric plants and one coal-fired steam plant were under construction at
15621-470: Was sponsored by General Electric (GE). He was fired in 1962 after publicly referring to the TVA, which was a major customer for GE turbines, as one of the problems of "big government". Some claim that Reagan was instead fired due to a criminal antitrust investigation involving him and the Screen Actors Guild . However, Reagan was only interviewed; nobody was actually charged with anything in
15748-473: Was the Fontana Dam . After negotiations led by then-Vice President Harry Truman , TVA purchased the land from Nantahala Power and Light, a wholly owned subsidiary of Alcoa , and built Fontana Dam. Also in 1942, TVA's first coal-fired plant, the 267-megawatt Watts Bar Steam Plant , began operation. The government originally intended the electricity generated from Fontana to be used by Alcoa factories for
15875-401: Was the first new nuclear reactor to enter service in the United States in the 21st century. On December 22, 2008, an earthen dike impounding a coal ash pond at TVA's Kingston Fossil Plant failed, releasing 1.1 billion US gallons (4,200,000 m ) of coal ash slurry across 300 acres (1.2 km ) of land and into two tributaries of the Tennessee River. The spill, of which cleanup
16002-477: Was to support recreational and tourism development, unlike earlier dams constructed by TVA. Land acquired by eminent domain for the Tellico Dam and its reservoir that encountered minimal inundation was sold to private developers for the construction of present-day Tellico Village , a planned retirement community . The inflation crises of the 1970s and early 1980s, combined with the cancellation of several of
16129-507: Was used against him in a TV ad by Doyle Dane Bernbach for then-President Lyndon B. Johnson 's 1964 campaign , which depicted an auction taking place atop a dam and promised that Johnson would not sell TVA. The TVA has faced multiple constitutional challenges. The United States Supreme Court ruled TVA to be constitutional in Ashwander v. Tennessee Valley Authority (297 U.S. 288) in 1936. The Court noted that regulating commerce among
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