MGE Energy, Inc. (MGE Energy) operates as an investor-owned public utility holding company.
Segments
The company operates through Regulated Electric Utility Operations; Regulated Gas Utility Operations; Nonregulated Energy Operations; Transmission Investments; and All Other segments.
Regulated electric utility operations: generating, purchasing, and distributing electricity through MGE.
Regulated gas utility operations: purchasing and distributing natural gas through MGE.
Nonregulated energ...
MGE Energy, Inc. (MGE Energy) operates as an investor-owned public utility holding company.
Segments
The company operates through Regulated Electric Utility Operations; Regulated Gas Utility Operations; Nonregulated Energy Operations; Transmission Investments; and All Other segments.
Regulated electric utility operations: generating, purchasing, and distributing electricity through MGE.
Regulated gas utility operations: purchasing and distributing natural gas through MGE.
Nonregulated energy operations: owning and leasing electric generating capacity that assists MGE through MGE Energy's wholly owned subsidiaries, MGE Power Elm Road, and MGE Power West Campus.
Transmission investments – representing the company's investment in American Transmission Company LLC, a company engaged in the business of providing electric transmission services primarily in Wisconsin, and the company's investment in ATC Holdco LLC, a company created to facilitate out-of-state electric transmission development and investments.
All other: investing in companies and property that relate to the regulated operations, and financing the regulated operations, through its wholly owned subsidiaries, CWDC, MAGAEL, and North Mendota, as well as corporate functions.
Electric Utility Operations
MGE distributes electricity in a service area covering a 264 square-mile area of Dane County, Wisconsin. The service area includes the city of Madison, Wisconsin. The company owns or leases ownership interests in electric generation facilities located in Wisconsin and Iowa.
As of December 31, 2024, MGE supplied electric service to approximately 167,000 customers, with approximately 91% located in the cities of Fitchburg, Madison, Middleton, and Monona, Wisconsin, and 9% in adjacent areas.
MGE is registered with the North American Electric Reliability Corporation (NERC) and one regional entity, the Midwest Reliability Organization. The essential purposes of these entities are to develop and implement regional and NERC reliability standards, and determine compliance with those standards, including enforcement mechanisms.
Transmission
American Transmission Company LLC (ATC) was collectively formed by Wisconsin-based utilities, which were required by Wisconsin law to contribute their transmission facilities to an independent system operator. ATC continues to be owned by those utilities and their affiliates. ATC's purpose is to provide reliable, economic transmission service to all customers in a fair and equitable manner. ATC plans, constructs, operates, maintains, and expands transmission facilities that it owns to provide adequate and reliable transmission of power. ATC is regulated by FERC for all rate terms and conditions of service. ATC is also regulated by the PSCW for some aspects of its governance and is a transmission-owning member of the MISO.
Regional Transmission Organizations (RTO)
MISO
MGE is a non transmission owning member of Midcontinent Independent System Operator, Inc. (MISO). MISO, a Federal Energy Regulatory Commission (FERC)-approved Regional Transmission Organization (RTO), is responsible for monitoring the electric transmission system that delivers power from generating plants to wholesale power customers. MISO's role is to ensure equal access to the transmission system, and to maintain or improve electric system reliability across 15 U.S. states, and the Canadian province of Manitoba.
MISO operates a bid-based energy market. MGE offers substantially all of its generation to the MISO market, and purchases its electric supply, or load requirement, from the MISO market in accordance with the MISO tariff. MGE also participates in the ancillary services market operated by MISO, which is an extension of the existing energy market. Through the operation of the ancillary services market, MISO provides the reserves for MGE's load, and MGE may offer to sell reserves from its generating units.
MGE participates in the MISO capacity auction, which provides a forum for buyers and sellers of planning resource credits to interact. Load serving entities, such as MGE, may participate in the capacity auction to obtain the necessary aggregate planning resource credits needed to meet their planning reserve margin requirement established by the PSCW. Generator owners may participate to sell any excess aggregate planning resource credits.
Fuel Supply and Generation
MGE satisfies its customers' electric demand with internal generation and purchased power. MGE's fuel mix for generation fluctuates from year to year due to fuel pricing in the market, generating unit availability, weather, and customer demand.
Environmental Initiatives – Electricity Generation
MGE is working toward a more sustainable future for the benefit of its investors, employees, customers, and the broader community in its service area. The company is targeting net-zero carbon electricity by 2050, and MGE has committed to achieving carbon reductions of at least 80% by 2030 (from 2005 levels).
MGE's carbon reduction goals are generally aligned with those of the scientific community, and specifically with the Intergovernmental Panel on Climate Change (IPCC) and its recommendation of limiting global temperature increases to 1.5 degrees Celsius above pre-industrial levels. In 2020, the University of Wisconsin-Madison's Nelson Institute for Environmental Studies released its analysis of MGE's goal of reaching net-zero carbon electricity by 2050. The IPCC modeling available suggested that by 2050, emissions from electricity generation in industrialized countries should be 87% to 99% lower than the 2005 baseline.
Transitioning away from coal: MGE has announced plans to transition away from coal-fired generation and has no sole ownership of coal-fired assets. This transition will help the company meet its 2030 carbon reduction goal. By the end of 2032, MGE expects to eliminate coal as an owned generation source.
Columbia: MGE and the other co-owners of Columbia, a two-unit coal-fired generation facility, announced plans to retire Columbia Unit 1 and Unit 2 by the end of 2029. MGE and Columbia’s co-owners plan to explore converting at least one unit to natural gas before its retirement. MGE currently owns 19% of the facility. Final timing and retirement dates are subject to change depending on operational, regulatory, capacity needs, and other factors impacting one or more of the Columbia co-owners. With the planned retirement of both units at Columbia, MGE will have eliminated approximately two-thirds of the company’s current coal-fired generation capacity by 2030.
Elm Road Units: MGE, along with the plant co-owners, announced plans to end the use of coal as a primary fuel at the Elm Road Units and transition the plant to natural gas. Transition plans and costs will be subject to PSCW approval. By the end of 2030, MGE expects coal at the Elm Road Units to be used only as a backup fuel, and a full transition away from coal by the end of 2032.
Renewable generation and storage: Solar, wind, and battery storage projects play a critical role in MGE's strategy for reducing carbon in pursuit of the company's goal of achieving net-zero carbon electricity by 2050. Additionally, MGE plans to reduce its use of fossil fuels, and work to help customers with energy efficiency and electrification, including the electrification of transportation.
Since 2015, MGE has added 222 MW of solar and 93 MW of wind generation facilities to its electric renewable generation portfolio. In addition, the company expects to add approximately 178 MW of solar, 18 MW of wind, and 118 MW of battery storage, which include projects approved or pending PSCW approval, by the end of 2028.
MGE is partnering with the other co-owners of Columbia to construct a compressed carbon dioxide long-duration energy storage system, known as the Columbia Energy Storage project. MGE's 19% share will be 3 MW. The project was selected for a grant from the U.S. Department of Energy. If the Columbia Energy Storage project is approved by the PSCW, the project would be the first of its kind in the United States.
Renewable Energy Rider (RER): Under this program, MGE partners with large energy users, primarily governmental entities, on customized renewable energy solutions. MGE owns the generation assets, and RER customers are billed a contractual renewable resource rate (as approved by the PSCW) for all costs associated with the construction and ongoing operations of the renewable generation facility. The company has developed approximately 42 MW of solar generation under the RER program.
Shared Solar Program: This program provides an option for residential and small business customers to power their household or business with locally generated solar energy for up to half of their annual energy use. The first solar array associated with this program, owned by MGE, became operational in 2017 with a capacity of 500 KW. MGE expanded the program by completing construction of a second solar facility (Morey Field), which added 3.5 MW of capacity to the program.
Electrifying Transportation: The electrification of transportation is a key strategy for reducing carbon emissions. MGE has established a network of more than 50 charging stations, powered by renewable energy, serving the growing number of electric vehicles (EV) in MGE's service area. The EV fast charging hubs feature some of the most powerful EV chargers in the Midwest. Charge@Home, MGE's home EV charging program, makes it easy for EV drivers to charge efficiently and conveniently. The company has continued to add EVs to its fleet and is targeting 100% all-electric or plug-in hybrid light-duty vehicles by 2030. Additionally, MGE is working with the City of Madison to further the electrification of its vehicles and buses.
Natural gas as a fuel source: As part of MGE's continued energy transition plan, the company plans to invest in additional natural gas plants and storage facilities. In early 2023, MGE purchased 25 MW in the West Riverside Energy Center (West Riverside), a highly efficient, state-of-the-art natural gas-fired plant in Beloit, Wisconsin. In June 2024, MGE purchased an additional 25 MW of capacity in West Riverside. Natural gas has lower carbon emission rates compared to coal-fired generation. MGE has additional investments in natural gas generators planned for the future to ensure adequate dispatchable capacity requirements are met.
Generation Sources
MGE receives electric generation supply from coal-fired, gas-fired, and renewable energy sources. These sources include owned facilities as well as facilities leased from affiliates and accounted for under the company’s nonregulated energy operations.
Purchased Power
MGE enters into short- and long-term purchase power commitments with third parties to meet a portion of its anticipated electric energy supply needs. As of December 31, 2024, MGE had 30 MW of a renewable purchase power commitment for each of the next three years.
Gas Utility Operations
MGE transports and distributes natural gas in a service area covering 1,684 square miles in seven south-central Wisconsin counties. The service area includes the city of Madison, Wisconsin, and surrounding areas.
As of December 31, 2024, MGE supplied natural gas service to approximately 178,000 customers in the cities of Elroy, Fitchburg, Lodi, Madison, Middleton, Monona, Prairie du Chien, Verona, and Viroqua; 25 villages; and all or parts of 50 townships.
MGE can curtail gas deliveries to interruptible customers.
Environmental Initiatives: Natural Gas Distribution
Building upon its long-standing commitment to providing affordable, sustainable energy, MGE has set a goal to achieve net-zero methane emissions from its natural gas distribution system by 2035.
Gas Supply
MGE has physical interconnections with ANR Pipeline Company (ANR) and Northern Natural Gas Company (NNG). MGE's primary service territory, which includes Madison and the surrounding area, receives deliveries at one NNG and four ANR gate stations. MGE's outlying territory receives deliveries at NNG gate stations located in Elroy, Prairie du Chien, Viroqua, and Crawford County. Interconnections with two major pipelines provide competition in interstate pipeline service and a more reliable and economical gas supply mix, which includes gas from Canada, and the mid-continent and Gulf Coast regions of the United States.
During the winter months, when customer demand is typically higher, MGE is primarily concerned with meeting its obligation to customers. The company meets customer demand by using firm supplies under contracts finalized before the heating season, supplies in storage (injected during the summer), and other firm supplies purchased during the winter period.
Annually, through its contracts with ANR, a total of approximately 6.5 million Dth of gas can be injected into ANR's storage fields in Michigan from April 1 through October 31. These gas supplies are then available for withdrawal during the subsequent heating season, from November 1 through March 31. Using storage allows MGE to buy gas supplies during the summer season, when prices are normally lower, and withdraw these supplies during the winter season, when prices are typically higher. Storage also gives MGE more flexibility in meeting daily load fluctuations.
MGE's contracts for firm transportation service of gas include winter maximum daily quantities of 185,650 Dth (including 116,078 Dth of storage withdrawals) on ANR; and 81,453 Dth on NNG.
Nonregulated Energy Operations
MGE Energy, through its subsidiaries, has developed generation sources that assist MGE in meeting the electricity needs of its customers. These sources consist of the Elm Road Units and the WCCF, which are owned by subsidiaries of MGE Energy and leased to MGE.
Transmission Investments
ATC owns and operates electric transmission facilities primarily in Wisconsin. MGE received an interest in ATC when it, in coordination with other Wisconsin electric utilities, contributed its electric transmission facilities to ATC as required by Wisconsin law. That interest is presently held by MGE Transco, a wholly owned subsidiary of MGE Energy. As of December 31, 2024, MGE Transco held a 3.6% ownership interest in ATC.
ATC Holdco was formed by several of the members of ATC, including MGE Energy, to explore electric transmission development and investments outside of Wisconsin, which typically have long development and investment lead times before becoming operational. MGE Energy's ownership interest in ATC Holdco is held by MGEE Transco, a wholly-owned subsidiary of MGE Energy. As of December 31, 2024, MGEE Transco held a 4.4% ownership interest in ATC Holdco.
Properties
Columbia
MGE and two other utilities jointly own Columbia, a coal-fired generating facility consisting of two units, which, as of December 31, 2024, accounted for 22% of MGE's net summer rated capacity. Power from this facility is shared in proportion to each owner's ownership interest. As of December 31, 2024, MGE had a 19% ownership interest in Columbia. The other owners are WPL, which operates Columbia, and WPSC. MGE and the other co-owners announced plans to retire Columbia. The co-owners intend to retire Unit 1 and Unit 2 by the end of 2029. Final timing and unit retirement dates are subject to change depending on operational, regulatory, capacity needs, and other factors.
The Columbia units burn low-sulfur sub-bituminous coal obtained from the Powder River Basin coal fields located in Wyoming. The coal inventory supply for the Columbia units was approximately 90 days as of December 31, 2023, and approximately 87 days as of December 31, 2024.
Elm Road Units and WCCF
MGE Power Elm Road and two other utilities own undivided interests in the Elm Road Units, consisting of two units, which, as of December 31, 2024, accounted for 11% of MGE's net summer rated capacity. Power from these units is shared in proportion to each owner's ownership interest. MGE Power Elm Road owns an 8.33% ownership interest in the Elm Road Units, and its interest in the Elm Road Units is leased to MGE. The other owners are Wisconsin Energy Corporation, which operates the units, and WPPI Energy, Inc. The Elm Road Units burn bituminous coal obtained from northern West Virginia and southwestern Pennsylvania, and sub-bituminous coal from the Powder River Basin in Wyoming.
MGE Power West Campus and the UW jointly own undivided interests in a natural gas-fired cogeneration facility on the UW campus. The facility has the capacity to produce 30,000 tons of chilled water, 500,000 pounds per hour of steam, and approximately 150 MW of electricity. The UW owns 45% of the facility, which represents its interest in the chilled-water and steam assets. These assets are used to meet a part of the UW's need for air-conditioning and steam-heat capacity. MGE Power West Campus owns 55% of the facility, which represents its interest in the electric generating assets. These assets are used to provide electricity to MGE's customers.
MGE leases MGE Power Elm Road's ownership interest in the Elm Road Units pursuant to two separate facility leases. MGE leases the electric generating assets owned by MGE Power West Campus and is responsible for operating the entire facility.
Electric and Gas Distribution Facilities
As of December 31, 2024, MGE owned 825 miles of overhead electric distribution line and 1,359 miles of underground electric distribution cable, all of which are located in Wisconsin. These electric distribution facilities are connected by 48 substations, installed with a capacity of 1.2 million kVA. MGE's gas facilities include 3,092 miles of distribution mains, which are all owned by MGE.
Environmental Regulation
As a public utility, MGE is subject to regulation by the PSCW (Public Service Commission of Wisconsin) and the FERC (Federal Energy Regulatory Commission). The PSCW has authority to regulate most aspects of MGE's business including rates, accounts, the issuance of securities, and plant siting. The PSCW also has authority over certain aspects of MGE Energy as a holding company of a public utility. FERC has jurisdiction, under the Federal Power Act, over certain accounting practices and certain other aspects of MGE's business.
In 2023, the EPA finalized its Federal Implementation Plan to address state obligations under the Clean Air Act good neighbor provisions for the 2015 Ozone National Ambient Air Quality Standards (NAAQS).
History
MGE Energy, Inc. was founded in 2001. The company was incorporated in 2001.
