# Dan E. Karn Generating Plant

The Dan E. Karn Power Plant is a multi-fuel power station located in Essexville, Michigan. It is adjacent to the location of the former J.C. Weadock Power Plant Power Plant, which closed in 2016.
The primary fuels for the Karn facility are coal and natural gas. The facility's owner, Consumers Energy, closed the coal-fired units in June 2023.

## History

Unit 1, a coal-fired system, was opened in November 1959, and dedicated in June 1960. Combined with the adjacent J.C. Weadock Power Plant Power Plant, it was known as the Karn/Weadock Generating Complex. The combined complex occupied 2,400 acres of land.
Unit 2, another coal-fired system, was opened in March 1961.
Unit 3, a gas-fired system, was opened in January 1975 followed by another gas-fired system, unit 4, in September 1977.
In 1960, it was one of four plants providing approximately 95% of Consumer Energy's electricity.
The complex acquired an American Locomotive Company RS-1 locomotive in 1968, which it later donated to the Sagianw Railway Museum. The train was used to transport coal to the coal-fired units 1 and 2.
From 1990 to 1997, an onsite walleye rearing pond raised approximately 5,000 fingerlings which were released in the nearby Saginaw Bay.
From 1991 until 2010 the complex was certified by the Wildlife Habitat Council for stewardship of its land.
In 2004, the nitrogen oxide emissions at units 1 and 2 were reduced by 83% by installing selective catalytic reduction (SCR) equipment. The first SCR equipment was installed on unit 2 in 2003, followed by unit 1 in 2004. The total cost for both installations was approximately US$120,000,000 (equivalent to $193,572,939 in 2023).
From 2006 until 2010 the complex received the Clean Corporate Citizen designation from the then Michigan Department of Environmental Quality (now the Michigan Department of Environment, Great Lakes, and Energy). It also received from the department membership in the Michigan Business Pollution Prevention Partnership from 2006 to 2012.
In 2007, Consumers Energy announced a $2.3 billion plan to build a coal-fired plant at the complex. The plan was formally cancelled in 2010.
In 2008, the United States Fish and Wildlife Service installed a bald eagle nesting platform on the north side of the facility near Windy Point at the mouth of the Saginaw River.
A replacement of the complex's seawall and freighter dock was completed in 2009.
The neighboring power plant, J.C. Weadock power plant, was taken offline in April 2016.
Consumers Energy announced in March 2022 that under an agreement with the Michigan Attorney General, they would close the two coal-fired units, units 1 and 2, in 2023. This will leave units 3 and 4 as the only operational units left, both of which utilize natural gas and fuel oil. Those units are scheduled to operate until May 2031.
Units 1 and 2 were closed in June, 2023.

## Namesake

Daniel Earl Karn, born April 29, 1890, was president of Consumers Energy (then Consumers Power) from 1951 until his retirement in 1960. He also served on the company's board of directors from 1933 until 1967. He died on June 20, 1969.

## Technology

The Karn facility has four units, units 1 and 2 which are coal-fired, and units 3 and 4 which are natural gas-fired.
The coal-fired stations, units 1 and 2, can each generate 272 megawatts (MW) of electricity. Units 3, a gas-fired station, can generate 692.5 MW of electricity. Unit 4, another gas-fired station, can generate 709.8 MW of electricity. As of January 2023, the plant has the capacity to generate 1,946.3 MW of electricity.
When unit 1 was dedicated in 1960, it had 23 switches with high momentary current ratings.
Units 1 and 2 use a tangential firing type for the coal while units 3 and 4 use an opposed wall firing type for the gas.
| Unit number | Date opened | Capacity | Technology | Primary fuel type |
| 1 | 1959 | 272 MW | Conventional steam coal | Coal |
| 2 | 1961 | 272 MW | Conventional steam coal | Coal |
| 3 | 1975 | 692.5 MW | Natural gas steam turbine | Natural gas |
| 4 | 1977 | 709.8 MW | Natural gas steam turbine | Natural gas |

## Emissions and environment

The Karn plant is operated under permits from the Michigan Department of Environment, Great Lakes, and Energy. According to that department's Michigan Air Emissions Reporting System Annual Pollutant Totals, in 2020 the facility emitted:
* CO (Carbon monoxide) - 285.97 tons (2020)
* SO $_x$ (sulfur oxides) - 629.44 tons (2020)
* NO$_x$ (nitrogen oxides) - 663.02 (2020)
* PM10 (particulates) - 431.3 tons (2020)