Caithness Energy
Caithness Energy is a privately held United States independent power producer that develops, acquires, operates, and manages electricity-generation assets.
Last updated August 31, 2026
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Overview
Caithness Energy, LLC is a privately held American independent power producer headquartered in Red Bank, New Jersey. The company develops, acquires, operates, and manages power-generation assets, with a portfolio and development history spanning geothermal, wind, solar, and natural-gas-fired generation. Its business has changed substantially since its establishment in 1964: it began with natural-resource exploration, later concentrated on geothermal resources, and subsequently broadened its activities across renewable and conventional electricity generation. During its early years, Caithness was associated with exploration for resources including gold, silver, oil, and natural gas. In the 1980s, the company shifted toward domestic geothermal exploration and the development of electricity-generating projects using geothermal resources. Projects associated with this period included the 240-megawatt Coso Geothermal Project in California, the 60-megawatt Dixie Valley Geothermal Project in Nevada, and the 17-megawatt Steamboat Springs Geothermal Project, also in Nevada. These activities established Caithness as a participant in utility-scale renewable generation well before wind and solar became the dominant growth areas of the American clean-energy sector. In the 1990s, Caithness expanded beyond geothermal power. Its activities came to include wind and solar projects as well as simple-cycle and combined-cycle natural-gas generation facilities. This broader approach reflected the role of independent power producers in supplying electricity through projects developed outside the traditional vertically integrated utility model. Caithness has generally operated as an asset-focused energy company rather than as a consumer-facing electricity retailer: its principal capabilities are project development, investment, ownership, operations, and power-plant management. A notable portfolio transaction occurred in 2007, when Caithness sold part of its power-plant portfolio to ArcLight Capital Partners. The divested portfolio was subsequently renamed Terra-Gen Power. Following that transaction, Caithness continued to concentrate on a combination of renewable-energy assets and what its public descriptions characterize as environmentally progressive fossil-fuel projects. Its cited projects and facilities have included the Coso Geothermal Power Project, the Beowawe geothermal system, Shepherds Flat Wind Farm, the Caithness Long Island Energy Center, and Guernsey Power Station. These examples represent several generations of the company's business: geothermal development, large-scale wind generation, and gas-fired power plants designed for dispatchable electricity production. Caithness's brand identity is therefore centered on infrastructure development and power-asset management rather than a packaged consumer product. The company presents itself through the scale, technical diversity, and operating performance of its generating facilities. Its historical portfolio illustrates a hybrid strategy: renewable projects such as geothermal and wind are combined with solar development and natural-gas generation, allowing the business to participate in both the energy-transition market and the wider wholesale power market. Available reference material identifies the company as active and United States-focused, but does not provide sufficient current information to describe its complete asset portfolio, ownership structure, financial performance, executive roster, or present generation capacity.
History
Caithness Energy was established around 1964 as a natural-resource exploration company. Its early activities included exploration for gold, silver, oil, and natural gas. The company later moved toward energy infrastructure, using its resource-development background to pursue geothermal opportunities in the United States. During the 1980s, Caithness concentrated on domestic geothermal resources and on pairing those resources with electric-generating facilities. The projects associated with this phase included the Coso Geothermal Project in California, with a cited capacity of 240 megawatts, and the Dixie Valley and Steamboat Springs projects in Nevada, cited at 60 megawatts and 17 megawatts respectively. This period was important in defining Caithness as a power-development company rather than solely an exploration business. In the 1990s, Caithness broadened its energy portfolio. It expanded into wind and solar power while also developing or participating in simple-cycle and combined-cycle natural-gas generation. The change gave the company exposure to both renewable electricity and dispatchable thermal generation. It also reflected the growing role of independent power producers in the United States, where specialized developers build and operate generating facilities that sell electricity into wholesale markets or under power-supply arrangements. In 2007, Caithness sold part of its power-plant portfolio to ArcLight Capital Partners. The portfolio was subsequently given the name Terra-Gen Power. The transaction marked a significant portfolio transition, although Caithness remained active in power development after the sale. Its subsequent focus was described as combining renewable projects, including wind, solar, and geothermal, with natural-gas projects characterized as environmentally progressive fossil-fuel infrastructure. Projects and facilities associated with Caithness over time have included the Coso Geothermal Power Project, the Beowawe geothermal system, Shepherds Flat Wind Farm, the Caithness Long Island Energy Center, and Guernsey Power Station. The facilities illustrate the company's progression from geothermal development to a diversified generation platform spanning intermittent renewable resources, geothermal baseload generation, and gas-fired plants capable of providing dispatchable power. The company is currently described as a privately held independent power producer with corporate offices in Red Bank, New Jersey. Its core activities are the development, acquisition, operation, and management of power-generation assets. Publicly available reference material does not establish a complete current list of assets, a current executive team, detailed ownership information, financial results, or an exact present-day operating capacity. Accordingly, Caithness is best understood as a United States power-infrastructure company whose historical identity is defined by diversified generation development rather than by a consumer-facing product line.
- 2007
Partial power-portfolio sale
[1]Caithness sold part of its power-plant portfolio to ArcLight Capital Partners; the portfolio was later renamed Terra-Gen Power.
- 1990
Expansion into diversified power generation
[1]During the 1990s, Caithness expanded from geothermal power into wind, solar, simple-cycle gas, and combined-cycle gas generation.
- 1980
Shift toward geothermal energy
[1]During the 1980s, the company developed a strategy focused on exploring domestic geothermal resources and pairing them with electricity-generation projects.
- 1964
Company established
[1]Caithness was established as a natural-resource exploration business, initially pursuing resources such as gold, silver, oil, and natural gas.
Products and positioning
A privately held, infrastructure-oriented independent power producer focused on developing and managing utility-scale electricity-generation assets across renewable and natural-gas technologies.
Geothermal power generation
Coso Geothermal Power Project
A major geothermal power project in California associated with Caithness's geothermal-development period. Reference material cites the project at approximately 240 megawatts, making it one of the largest geothermal projects connected with the company's history.
Geothermal power generation
Dixie Valley Geothermal Project
A Nevada geothermal project associated with Caithness's 1980s focus on developing domestic geothermal resources for electricity generation. Reference material cites a capacity of approximately 60 megawatts.
Geothermal power generation
Steamboat Springs Geothermal Project
A geothermal electricity project in Nevada connected with Caithness's early power-generation activities. The cited capacity is approximately 17 megawatts.
Wind power generation
Shepherds Flat Wind Farm
A large-scale wind-generation facility listed among Caithness's planned, current, or former projects. It represents the company's expansion into utility-scale wind power as its portfolio moved beyond geothermal generation.
Natural-gas power generation
Caithness Long Island Energy Center
A gas-fired electricity-generation facility associated with Caithness's development and management of dispatchable power assets. The available reference identifies the facility but does not provide enough information here to state its capacity or current ownership.
Natural-gas power generation
Guernsey Power Station
A power-generation facility included among Caithness-associated projects. It reflects the company's participation in modern gas-fired generation alongside its renewable and geothermal activities.
Geothermal power generation
Beowawe geothermal system
A geothermal system in Nevada associated with Caithness's geothermal portfolio and resource-development history. The available material does not specify its current operating status or capacity.
Brand decisions
2007
Sold part of its power-plant portfolioM&ABackground
Caithness restructured part of its generation portfolio through a transaction with ArcLight Capital Partners.
Action taken
The company sold a portion of its power-plant portfolio to ArcLight Capital Partners.
Aftermath
The acquired portfolio was renamed Terra-Gen Power, while Caithness continued developing and managing other renewable and gas-generation projects.
1990
Diversified into wind, solar, and natural-gas generationStrategyBackground
During the 1990s, Caithness broadened its activities beyond geothermal energy.
Action taken
The company expanded into wind and solar projects and into simple-cycle and combined-cycle natural-gas power facilities.
Aftermath
Caithness developed a multi-technology independent-power-producer profile spanning renewable and dispatchable generation.
1980
Adopted a geothermal-development focusStrategyBackground
After beginning as a natural-resource exploration company, Caithness pursued domestic geothermal resources and associated electric-generating facilities during the 1980s.
Action taken
The company directed development activity toward geothermal projects including Coso, Dixie Valley, and Steamboat Springs.
Aftermath
This strategy established a power-generation identity that later expanded into additional renewable and conventional generation technologies.
Sources1 sources
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