History of DTE Energy in Timeline

By Popular Timelines Editorial Team · Updated: May 2, 2026

DTE Energy is a diversified energy company based in Detroit, operating in the United States and Canada. It primarily focuses on energy-related businesses and services. Its main operating units consist of an electric utility serving approximately 2.2 million customers and a natural gas utility serving around 1.3 million customers, both located in Michigan.

1903: Detroit Gas Co. Renamed Detroit City Gas Co. in 1903

In 1903, the Detroit Gas Co. was renamed the Detroit City Gas Co. It secured franchises for Highland Park and Hamtramck and increased its customer base to more than 67,000.

1903: Detroit Edison Company Merged and Founded

In 1903, the two companies merged as the Detroit Edison Company, and the company began trading on January 17. In 1903, construction began on the Delray 1 Power Plant, and Henry Ford founded Ford Motor Company.

1904: Detroit Edison Signs First Power Contract with Cadillac Motor Car Co.

In 1904, Detroit Edison signed its first power contract with an automobile company, Cadillac Motor Car Co.

1905: American Light & Traction Co. Acquires Detroit City Gas Co. in 1905

In 1905, a majority of the Detroit City Gas Co. was acquired by the American Light & Traction Co., a holding company that controlled utility and transportation interests.

1908: Delray 2 Power Plant Added in 1908

In 1908, the Delray 2 Power Plant was added due to the increased demand for electricity.

1913: Detroit City Gas Acquires Additional Service Territory in 1913

In 1913, Detroit City Gas acquired additional service territory that included the communities of River Rouge, Wyandotte, Dearborn, Ecorse and Trenton.

1924: Detroit Edison Increased Production Capacity by Building Power Plants in 1924

In 1924, Detroit Edison increased its production capacity by building the Marysville power plant.

1929: Detroit Edison Increased Production Capacity by Building Power Plants in 1929

In 1929, Detroit Edison increased its production capacity by building the Trenton Channel and Delray 3 power plants.

1937: Detroit City Gas Company Merged to Form Michigan Consolidated Gas Company in 1937

In 1937, Detroit City Gas Company merged with Grand Rapids Gas Light Company, Washtenaw Gas Company and Ann Arbor Gas Company to form Michigan Consolidated Gas Company (MichCon).

1938: Merger Approved for Michigan Consolidated Gas Company in 1938

In 1938, the merger to form Michigan Consolidated Gas Company (MichCon) was approved by state and federal regulators, creating one gas provider for most of the southern half of the Lower Peninsula.

1945: Michigan-Wisconsin Pipeline Completed in 1945

To meet the increasing demand for natural gas, the Michigan-Wisconsin Pipeline was completed in 1945.

1949: American Natural Gas Co. Formed in 1949

In 1949, Michigan Consolidated Gas, the Milwaukee Gas Co., the Michigan-Wisconsin Gas Co., the Austin Field Pipeline Co. and the Milwaukee Solvay Co. became the American Natural Gas Co.

1954: St. Clair Power Plant Added in 1954

Detroit Edison added the St. Clair Power Plant in 1954, which was one of the largest power plants in the world at the time.

1956: Detroit Edison Starts Construction on Power Plants in 1956

In 1956, Detroit Edison broke ground for the Enrico Fermi Power Plant and also began work on the River Rouge Power Plant.

1970: Construction of Fermi 2 Nuclear Plant Started in 1970

In 1970, construction started on the Fermi 2 nuclear plant.

1971: Monroe Power Plant Units 1-4 Came Online in 1971

From 1971-74, Monroe Power Plant Units 1-4 came online.

1972: Construction Began on Greenwood Energy Center in 1972

Construction began in 1972 on the Greenwood Energy Center, which was the company's first inland plant designed for both oil and nuclear-fueled generating units.

1973: Ludington Pumped Storage Plant Went Into Service in 1973

The Ludington Pumped Storage Plant, co-owned by Detroit Edison and Consumers Power Company, went into service in 1973.

1981: MichCon became a subsidiary of Primark Corp in 1981

In 1981, MichCon became a wholly owned subsidiary of Primark Corp.

1983: Detroit Edison Created Utility Technical Services in 1983

In 1983, Detroit Edison sought to sell its engineering expertise through the creation of Utility Technical Services, later called SYNDECO — Detroit Edison's first subsidiary business.

1984: Belle River Units 1 and 2 went online in 1984

Supporting the new marketing push and increasing customer demand was Belle River Unit 1, which went online in 1984.

1985: Belle River Units 1 and 2 went online in 1985

Supporting the new marketing push and increasing customer demand was Belle River Unit 2, which went online in 1985.

1986: Detroit Edison Foundation Formed in 1986

In 1986, the Detroit Edison Foundation was formed to manage the company's charitable giving programs and volunteer efforts that had grown over the years.

1988: Primark spun-off MichCon in 1988

In 1988, Primark spun-off MichCon, and the MCN Corp. was established as the parent company of MichCon.

1988: Fermi 2 Unit Licensed and DTE Biomass Energy Founded in 1988

In 1988, the Fermi 2 unit was licensed and went online. The company also founded what is now DTE Biomass Energy to begin collecting methane gas from landfills for use in energy production.

January 1996: Detroit Edison Reorganized as DTE Energy in January 1996

In January 1996, Detroit Edison reorganized as a holding company named DTE Energy. The ticker symbol "DTE" was selected because it was the existing stock ticker symbol for Detroit Edison.

1996: Detroit Edison becomes DTE Energy

In 1996, Detroit Edison was reorganized as a holding company and renamed DTE Energy. The ticker symbol "DTE" was chosen because it was already in use by Detroit Edison.

May 31, 2001: DTE Energy and MCN Energy Group Completed Merger in May 2001

On May 31, 2001, DTE Energy and MCN Energy Group completed a merger which created Michigan's largest energy company. MichCon became an operating company of DTE Energy.

2007: DTE Energy Began Acquiring Wind Development Rights in 2007

In 2007, DTE Energy began acquiring wind development rights on more than 100,000 acres of land in the Thumb area.

December 2012: DTE Energy's Wind Parks Commissioned in December 2012

In December 2012, the first DTE Energy-owned and constructed wind parks were commissioned, with two located in Huron County and one in Sanilac County.

2013: DTE Energy Adopted "DTE" Brand in 2013

In 2013, DTE Energy adopted "DTE" as its customer-facing brand. Accordingly, Detroit Edison Company changed its name to DTE Electric Company, while Michigan Consolidated Gas changed its name to DTE Gas.

October 27, 2020: DTE Announced Spin-Off of DTE Midstream on October 27, 2020

On October 27, 2020, DTE announced its plan to spin off DTE Midstream into an independent, publicly traded business called DT Midstream.

2020: DTE Electric's Power Generation Portfolio in 2020

In 2020, 32.62% of DTE Electric's power generation came from renewable and nuclear generation, while 67.13% came from coal, gas, and oil.

July 1, 2021: DT Midstream Successfully Spun Off on July 1, 2021

On July 1, 2021, DT Midstream successfully spun off.

Nov 18, 2021: DTE Energy Participated in American Rescue Plan on November 18, 2021

According to a statement released by the White House on Nov 18, 2021, DTE Energy participated in the American Rescue Plan by committing to help customers during the COVID-19 pandemic, by proactively using resources.

2022: DTE's Electricity Generation Sources in 2022

As of 2022, DTE's electricity generation was comprised of 54.16% from coal, 18.16% from nuclear, 14.22% from natural gas, and 13.11% from renewable energy sources including wind, solar, and hydroelectric power.

January 16, 2025: DTE Gas and DTE Electric Received Conditional Loan Commitments on January 16, 2025

On January 16, 2025, DTE Gas and DTE Electric received a total of $8.81 billion in conditional commitments for loan guarantees through the US Department of Energy's Loan Programs Office that would be used to install thousands of megawatts of renewable energy generation and storage.