Avista Corporation

OGE Energy CorpOGE · EnergyOklahoma City, United States

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OGE Energy Corp., along with its various subsidiaries, operates as a comprehensive energy and utility provider. The company facilitates the physical delivery and associated services for electricity, natural gas, crude oil, and natural gas liquids across the United States. Its core operations encompass the generation, transmission, distribution, and sale of electrical power. OGE Energy serves approximately 879,000 retail electric customers within an expansive service area spanning about 30,000 square miles in Oklahoma and western Arkansas. The company also owns and manages a diverse portfolio of power generation facilities, utilizing coal, natural gas, wind, and solar sources. As of December 31, 2021, OGE Energy Corp. maintained substantial interconnected electrical infrastructure. This included 16 power generation stations with a combined output capability of 7,207 megawatts. Its transmission networks featured 54 substations and 5,122 structural miles of lines in Oklahoma, complemented by 7 substations and 277 structural miles of lines in Arkansas. The distribution systems were equally extensive: in Oklahoma, they comprised 350 substations, 29,494 structural miles of overhead lines, 3,365 miles of underground conduit, and 11,125 miles of underground conductors. In Arkansas, this infrastructure included 29 substations, 2,795 structural miles of overhead lines, 349 miles of underground conduit, and 662 miles of underground conductors. Established in 1902, OGE Energy Corp. is headquartered in Oklahoma City, Oklahoma.

Portland General Electric (PGE) functions as a fully integrated electric utility, overseeing the generation, wholesale procurement, transmission, distribution, and direct retail sale of electricity throughout Oregon. Its power generation assets include seven hydroelectric facilities, three wind farms, and six thermal plants. As of December 31, 2021, PGE's electric transmission system covered 1,274 circuit miles, which notably comprised 287 miles of 500 kilovolt lines, 415 miles of 230 kilovolt lines, and 572 miles of 115 kilovolt lines. The company also manages an extensive 28,206-circuit-mile network of distribution lines. In addition to its electricity operations, PGE engages in the wholesale buying and selling of natural gas across the United States and Canada. It provides service to roughly 917,000 residential, commercial, and industrial customers situated in 51 different cities. The company was founded in 1889 and maintains its primary office in Portland, Oregon.

Northwest Natural Holding Company (NWN) operates primarily through its subsidiary, Northwest Natural Gas Company, delivering regulated natural gas to a diverse clientele including residential, commercial, industrial, and transportation customers across Oregon and Southwest Washington. Beyond its core distribution business, the company manages the Mist gas storage facility, which holds 5.7 billion cubic feet and is leased to other utilities and third-party energy marketers. It also provides natural gas asset management solutions and maintains an appliance retail outlet. NWN's strategic investments extend to broader gas storage activities, water services, non-regulated renewable natural gas ventures, and other diversified interests. The company currently supplies natural gas to approximately 786,000 meters within its service territories in Oregon and southwest Washington. Additionally, its water operations cater to about 80,000 individuals through roughly 33,000 water and wastewater connections located in the Pacific Northwest and Texas. Founded in 1859, Northwest Natural Holding Company is headquartered in Portland, Oregon.

NorthWestern Corporation, which conducts business under the name NorthWestern Energy, supplies electricity and natural gas to residential, commercial, and diverse industrial clients. The company organizes its operations into two primary divisions: Electric and Natural Gas. In its Electric segment, NorthWestern Energy is responsible for generating, procuring, transmitting, and distributing electrical power. For its Natural Gas segment, the firm undertakes the production, purchase, storage, transmission, and delivery of natural gas, additionally holding local government authorizations to provide gas services in various communities. The company's extensive infrastructure in Montana encompasses 6,819 miles of electric transmission lines, 18,177 miles of electric distribution lines, and roughly 400 transmission and distribution substations. Its natural gas network in Montana features 2,166 miles of transmission lines, 4,945 miles of distribution lines, and approximately 138 city gate stations. Furthermore, in South Dakota, NorthWestern Energy manages 1,308 miles of electric transmission and 2,320 miles of electric distribution lines. Its natural gas facilities in South Dakota include 55 miles of transmission lines, while a combined 2,517 miles of natural gas distribution lines serve both South Dakota and Nebraska. Collectively, NorthWestern Energy caters to approximately 753,600 customers situated across Montana, South Dakota, Nebraska, and Yellowstone National Park. The corporation was founded in 1923 and is based in Sioux Falls, South Dakota.

Alliant Energy Corporation operates as a utility holding entity, delivering regulated electricity and natural gas provisions. The company's activities are structured across three primary segments: Utility Electric Operations, Utility Gas Operations, and Utility Other. Through its subsidiary, Interstate Power and Light Company (IPL), it is responsible for generating and distributing electricity, and distributing and transporting natural gas to individual consumers across Iowa. IPL also supplies electricity to wholesale buyers in Minnesota, Illinois, and Iowa, in addition to producing and supplying steam within Cedar Rapids, Iowa. By the close of 2021, IPL served around 500,000 retail electricity clients and roughly 225,000 retail natural gas customers. Similarly, its other subsidiary, Wisconsin Power and Light Company (WPL), handles the generation and distribution of electricity, as well as the distribution and transport of natural gas for retail consumers throughout Wisconsin, alongside selling electricity to wholesale accounts within the state. At the same date (December 31, 2021), WPL provided electric service to approximately 485,000 retail clients and natural gas to about 200,000. Its diverse retail clientele spans sectors such as farming, agriculture, industrial manufacturing, chemicals, packaging, and food production. Furthermore, the corporation holds and manages a short-line rail freight operation in Iowa, a multi-modal freight terminal (barge, rail, and truck) situated on the Mississippi River, and a rail-accessible warehouse, also in Iowa. It also provides freight brokerage solutions. The company also possesses stakes in a 347-megawatt (MW) natural gas-powered electricity generation facility near Sheboygan Falls, Wisconsin, and a 225 MW wind energy farm in Oklahoma. Established in 1981, its corporate headquarters are situated in Madison, Wisconsin.

Black Hills Corporation operates as an American utility firm, delivering both electric power and natural gas through its subsidiaries. Its business is organized into two primary divisions: Electric Utilities and Gas Utilities. The Electric Utilities segment is responsible for generating, transmitting, and distributing electricity to approximately 218,000 customers spanning Colorado, Montana, South Dakota, and Wyoming. This division manages 1,481.5 megawatts of power generation capacity and maintains 8,892 miles of electric transmission and distribution lines. Electric power generation is diversified, utilizing wind, natural gas, and coal-fired plants, and the company also operates a coal mine near Gillette, Wyoming. Conversely, the Gas Utilities segment provides natural gas to roughly 1,094,000 utility clients across Arkansas, Colorado, Iowa, Kansas, Nebraska, and Wyoming. This operation includes overseeing 4,732 miles of intrastate gas transmission pipelines, 41,644 miles of gas distribution mains and service lines, six natural gas storage facilities, around 50,000 horsepower of compression, and 515 miles of gathering lines. Beyond these core utility offerings, Black Hills Corporation also constructs and maintains gas infrastructure for various gas transportation customers. It provides appliance repair services for residential utility subscribers and offers electrical system construction to large industrial clients. Founded in 1941, the company's headquarters are situated in Rapid City, South Dakota.