1925 - Mississippi Power was established at midnight on January 1, 1925, when it took over the assets of the Gulfport and Mississippi Coast Traction Company, which operated a small generating plant in Gulfport and an electric railway from Pass Christian to Biloxi.
In November 1925, Couch’s Sterlington generating station was placed online.
Both men knew that they could not continue competing for territory so in 1925 they joined forces, consolidating their properties into one large, interconnected system.
Mississippi Power Company was founded in 1925.
The Great Depression that began in 1929 brought hard times, reduced sales and shriveling capital markets to utilities.
By 1932 there were eight holding companies controlling 73 percent of the investor-owned electric business.
Previously, in 1934, Alcorn County Electric Power Association had been organized to distribute electricity purchased from the Tennessee Valley Authority.
President Roosevelt created the Rural Electrification Administration (now called Rural Utilities Services) by executive order on May 11, 1935.
In September 1935, Monroe County Electric Power Association of Amory became the first electric power association in Mississippi to secure an REA loan and begin operations.
1945 - Following years of difficulties connected with the Depression as well as material restrictions and manpower shortages during World War II, Mississippi Power’s first power plant begins commercial operation near Hattiesburg.
In 1949 EBASCO’s Electric Power and Light Corporation was dissolved.
In 1949, Southern Company was established as a holding company for four utilities, one of which included Mississippi Power Company.
1951 - Mississippi Power's second generating plant, located near Meridian, begins producing electricity.
1953 - A second unit at Plant Sweatt increases electricity generation to 1 billion kilowatt-hours a year.
1956 - Mississippi Public Service Commission established.
1957 - Plant Watson begins commercial operation.
Little Gypsy, located on the Mississippi River upriver from New Orleans, became the world’s first fully-automated generating unit in 1961.
Edgar Dixon died in 1962 and was succeeded by Gerald Andrus.
1962 - In partnership with one of its sister companies, Alabama Power, Mississippi Power begins construction of a generating plant along the Warrior River near Demopolis, Alabama.
As MSU’s second president, Andrus’ first major achievement was the creation of the service company, Middle South Services, Inc. (now known as Entergy Services, Inc.) in 1963.
In 1968 the system entered the nuclear age when Arkansas Power and Light was granted a construction permit to build Arkansas Nuclear One Unit One near Russellville, Ark.
In 1970, LP&L announced plans for its Waterford 3 nuclear unit near Taft, La.
Gerald Andrus retired in 1974 and Floyd Lewis became the third president of MSU. His major task was to deal with the effects of higher fuel prices and uncertain availability.
1977 - The first unit of Plant Daniel in Jackson County begins commercial operation.
The Public Utility Commission of Texas approved construction of Montgomery County Power Station, Entergy’s first new generation project in Texas since 1979.
In 1980, the system's first coal-fired unit came on line.
1981 - Unit Two at Plant Daniel begins commercial operation.
1983 - Company begins annual $25,000 donation to the Red Cross to aid the elderly disadvantaged with heating bills.
To face the challenges ahead, the company officially changed its name to Entergy Corporation at the annual meeting of stockholders in May 1989.
Entergy Operations, Inc., and Entergy Power, Inc., were born in 1990.
On June 8, 1992, Entergy announced its plan to acquire Gulf States Utilities, which provided electric service to customers in southeastern Texas and southwestern Louisiana.
Edwin Lupberger resigns and Bob Luft becomes chairman of Entergy board and acting CEO (May, 1998).
J. Wayne Leonard becomes CEO (November, 1998).
Company signs agreement with Environmental Defense Fund to hold greenhouse emissions to 2000 level, first United States utility to make such a pledge.
Entergy has been included on at least one of those indexes every year since 2002.
Entergy earns the industry's highest honor - the 2002 Edison Award - from the Edison Electric Institute.
2002 - Duke Energy, a large-scale independent power producer, interconnected with Mississippi Power's transmission system with station service provided at its 640-megawatt plant in Enterprise.
2003 Entergy Signs to Furnish Management to Cooper Nuclear Station.
2003 - Mississippi Power establishes a "green rate" for customers, an optional rate to contribute to the production or purchase of renewable energy - electrical energy produced using renewable resources.
2003 - The Mississippi Power Community Connection was created, combining the charitable efforts of employees, retirees and their families with matching funds to boost the amount of charitable donations to community organizations and/or provide employees in need with assistance.
2003 - Mississippi Power Education Foundation started its New Teacher Assistance Grants designed to attract and retain high quality teachers to service area schools.
Then, in 2005 hurricanes Katrina and Rita, among the greatest natural disasters in United States history, delivered an unprecedented one-two punch to Entergy's customers and infrastructure in the South.
In 2005, Entergy added to its fossil generation by purchasing the dual-unit, 718-megawatt Perryville Plant near Monroe, La.
Entergy earns the industry's highest honor - the 2005 Edison Award - from the Edison Electric Institute, for the second time.
With a team of 12,000 - employees and crews from every state and Canada - they were able to restore service to all who could receive it in only 12 days. It is no wonder that the Kemper Project, officially named Plant Ratcliffe, was named after the 2005 Southern Company CEO, David Ratcliffe.
2006 - Plant Daniel in Escatawpa, Miss., is selected for a multi-year research project to test carbon dioxide storage by the United States Department of Energy and the National Energy Technology Laboratory.
2006 - The Public Service Commission approves the company's plan to build a new Storm Center further inland and allowed the company to increase its storm reserve to $60 million.
At the end of 2007, the Louisiana Public Service Commission approved Entergy Gulf States' proposal to divide itself into two separate operating companies in Louisiana and Texas.
In 2007, Entergy purchased the Palisades plant in Covert, Mich. from Consumers Energy.
In 2007 Entergy sponsored an influential study on poverty often cited in the national policy debate, and announced a renewed commitment to reduce greenhouse gas emissions.
2007 - Mississippi Power teams with the Mississippi Department of Wildlife and Fisheries to begin restocking the Pascagoula River after Hurricane Katrina's massive fish kill by releasing more than 2,500 largemouth bass advanced fingerlings.
2007 - Mississippi Power announces a three-year total commitment to Mississippi State University's Early Childhood Education Institute.
in 2007, Mississippi Power teamed with the Mississippi Department of Wildlife and Fisheries to begin restocking the Pascagoula River after Hurricane Katrina's massive fish kill by releasing more than 2,500 largemouth bass advanced fingerlings.
On its own, Entergy Nuclear in 2008 submitted an application for a combined construction and operating license for the River Bend site.
As part of the NuStart consortium, Entergy Nuclear in 2008 submitted to the NRC an application for a combined construction and operating license for a possible new unit at the Grand Gulf site.
The year 2009 began with ice storms in Arkansas that disrupted power to more than 100,000 customers.
The 2009 Sustainability Yearbook recognized Entergy among the top-scoring 15 percent of 2,500 worldwide companies on corporate sustainability measurements.
In April 2010, after several regulatory delays and a ruling by the New York Public Service Commission to reject the spin-off, Entergy made the decision to unwind the business infrastructure associated with the proposed new companies.
2011 - Mississippi Power storm teams went to assist the utilities in Maryland and Washington D.C. in August following Hurricane Irene and returned to the east coast in November after a winter snow storm left more than 604,000 New Jersey utility customers without power.
In 2011 the company completed the acquisition of Unit 2 of the Acadia Energy Center, a 580-megawatt generating unit located near Eunice, La.
The same year, Entergy Wholesale Commodities announced the sale of the Rhode Island State Energy Center, an approximately 583-megawatt, natural gas-fired combined-cycle generating plant in Johnston, R.I., that Entergy had purchased in 2011.
The Edison Electric Institute honored Entergy for its work restoring power to its customers after Hurricane Isaac and to customers of other utilities after Hurricane Sandy and the June 2012 derecho weather event.
2012 - Mississippi Power crews assisted Entergy Arkansas restore outages after an extreme winter storm crossed the nation through the December holiday season.
2012 - The company's expertly maintained infrastructure provided the necessary strength to withstand the full force of an extremely slow-moving Hurricane Isaac.
After leading the company for 14 years, longer than any other CEO in company history, Wayne Leonard retired in January 2013.
2014 - In August, Plant Ratcliffe begins generating electricity from natural gas, delivering value to customers.
In 2014, the company announced plans to purchase Union Power Station.
In mid-2015, the Louisiana Public Service Commission approved Entergy's proposal to combine Entergy Gulf States Louisiana and Entergy Louisiana.
In addition, in 2015 Corporate Responsibility Magazine again named Entergy Corporation as one of the top 100 corporate citizens in the United States.
1, 2015, of approximately 22,500 electric customers in the Algiers area of the New Orleans area who were previously served by Entergy Louisiana.
In November 2016, Entergy agreed to sell Vermont Yankee to NorthStar Group Services for accelerated decommissioning.
In March 2017 Entergy completed the sale of FitzPatrick to Exelon.
2017 - Mississippi Power becomes the state's largest partner in renewable energy with the dedication of three large-scale solar facilities, providing more than 105 MW and powering nearly 15,000 homes.
In August 2018 Entergy agreed to sell the subsidiaries that own the Pilgrim and Palisades nuclear plants, after their shutdowns and reactor defuelings, to a Holtec International subsidiary for accelerated decommissioning.
In January 2019, Entergy began a multiyear deployment of new, advanced meters for customers' homes and businesses.
Pilgrim shut down in May 2019.
By the end of 2021, the company plans to deploy advanced meters across our entire system to approximately 3 million customers.
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