Mill Creek Generating Station

external view of Mill Creek station

The Mill Creek Generation Station is LG&E’s largest coal-fired power plant, with a generating capacity of 1,465 megawatts. Mill Creek sits on 544 acres in southwest Jefferson County, Ky.

The late 1960s and early 1970s saw an unprecedented increase in the construction of new industrial, commercial, and residential facilities in the Louisville area.

As customers’ demand for energy increased, LG&E needed additional generating capability to guarantee supply and ensure reliability. Mill Creek began commercial operation in 1972 to meet this growing demand.

Innovative and cost-effective power generation

LG&E began construction on Mill Creek in 1968; Unit 1 went into service by 1972, and Unit 2 by 1974. Unit 3 went into operation in 1978, and Unit 4 in 1982.

The construction of Mill Creek allowed the company to implement ideas that were innovative and cost- effective then — and the industry standard today.

Identical generating systems were installed for Units 1 and 2 so that they could have the same design and some of the same equipment, such as a single stack.

The controls for all four generating units were computerized and located in a centralized area. Additionally, a coal-handling system was installed that stockpiles coal as it is received, reclaims it from storage, reduces dust emissions, and can be controlled from several different locations.

With public concerns about aquatic life in the Ohio River, the company built Mill Creek’s first cooling tower to serve Unit 2. Mill Creek currently utilizes three large cooling towers.

LG&E pioneered the use of both electrostatic precipitators and scrubbers. All of the generating units were equipped with electrostatic precipitators to remove fly ash, and a flue gas desulfurization (FGD) system to remove sulfur dioxide (SO2) from the flue gas.

Today, the company has the most extensive scrubber program of any utility in the country.

Every megawatt generated at Mill Creek station is scrubbed. LG&E has received local, national and international attention for its SO2 removal efforts.

In 2000, LG&E installed its own facility for grinding limestone used in the scrubbing process.

Project Updates: Modernizing Our Emission Controls

Construction is nearing completion on modernizing emission controls at Mill Creek Generating Station in response to stricter EPA requirements.

The new equipment will further increase the company’s ability to control SO2 emissions from current levels (around 90 percent) to a 98 percent removal rate. In addition, mercury and particulate emissions will be further reduced in half.

Specific controls being retrofitted and enhanced include: new scrubbers for Mill Creek Units 1, 2 and 4 and an upgraded scrubber for Unit 3.

Fabric filters or baghouses are being added to all four units to reduce particulate, mercury, sulfuric acid emissions and other hazardous air pollutants.

For some of these pollutants, the company was already controlling up to 90 percent.

In your community

An important part of the company’s mission is to positively impact the communities in which it does business by supporting education, community outreach, environmental stewardship and the arts. Employees and contracted employees of Mill Creek have a long tradition of volunteer service, community involvement and support of local charities.

These and similar efforts contribute to the well-being and success of the communities in which we work and live, and reinforce LG&E and KU’s commitment to be both an employer of choice and a good corporate citizen.

Some of the local organizations and charitable causes Mill Creek employees are proud to support include:

  • Volunteering for LG&E and KU’s Annual Day of Caring
    • Each year, hundreds of volunteers assist nonprofit agencies and public parks across our service territory by tackling tasks like painting, mulching, cleaning up debris, building walkways and even building and remodeling homes.
  • Providing games for Metro Parks’ Sun Valley Summer Day Camp
  • Sponsoring Scholastic Book Fair reading programs at Watson Lane Elementary School
  • Providing back-to-school supplies for Southwest Ministries, Meade County Board of Education, and Mt. Washington Community Ministries
  • Sponsoring the Annual Southwest Community Festival
  • Sponsor visiting author program at Valley High School
  • Sponsor luncheons at Watson Lane Elementary and Valley High School during Teacher Appreciation Week
  • Sponsor Annual Mayor’s Derby Brunch at Riverside – The Farnsley Moremen Landing
  • Hold bi-monthly Red Cross Blood Drives
  • Mill Creek Engineers donate time to judge the Valley High School Annual Science Fair
  • Sponsor Valley Woman’s Club Annual Scholarship Program with 4 scholarships 
  • Sponsor JA Clays for Kids luncheon
  • Support various programs in Valley Village neighborhood (Annual Picnic, Thanksgiving Dinners, Christmas Party, East Egg Hunt, etc.)

Quick facts

  • Net generating capacity: 1,465 megawatts
  • Original startup date: 1972
  • Fuel: Coal
  • Annual fuel consumption: Approximately 4.8 million tons
  • Number of units in service: 4
  • Emission controls: units 1, 2: Low NOx, FGD, ESP; Units 3,4: Low NOx, FGD, ESP, SCR