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Calpine Celebrates 65 Years of The Geysers

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Calpine (NYSE:CEG) marked the 65th anniversary of The Geysers on October 13, 2025, celebrating six decades of commercial geothermal operations that began in 1960.

Calpine operates 13 geothermal plants across 45 square miles at The Geysers, producing enough renewable electricity to power approximately 725,000 homes annually. The site employs nearly 300 employees and 150 contractors in Lake and Sonoma Counties.

To commemorate the milestone, Calpine donated $65,000 to the Clear Lake Environmental Research Center to support watershed protection, wildfire prevention and habitat restoration.

Calpine (NYSE:CEG) ha segnato il 65° anniversario di The Geysers il 13 ottobre 2025, celebrando sei decenni di operazioni geotermiche commerciali iniziate nel 1960.

Calpine gestisce 13 impianti geotermici su 45 miglia quadrate a The Geysers, in grado di fornire abbastanza elettricità rinnovabile da alimentare circa 725.000 abitazioni all'anno. Il sito impiega quasi 300 dipendenti e 150 appaltatori nelle contee di Lake e Sonoma.

Per commemorare il traguardo, Calpine ha donato $65,000 al Clear Lake Environmental Research Center per sostenere la protezione delle acque, la prevenzione degli incendi boschivi e il ripristino dell'habitat.

Calpine (NYSE:CEG) conmemoró el 65° aniversario de The Geysers el 13 de octubre de 2025, celebrando seis décadas de operaciones geotérmicas comerciales que comenzaron en 1960.

Calpine opera 13 plantas geotérmicas en un área de 45 millas cuadradas en The Geysers, produciendo suficiente electricidad renovable para abastecer aproximadamente 725,000 hogares al año. El sitio emplea a casi 300 empleados y 150 contratistas en los condados de Lake y Sonoma.

Para conmemorar la ocasión, Calpine donó $65,000 al Clear Lake Environmental Research Center para apoyar la protección de cuencas, la prevención de incendios forestales y la restauración de hábitats.

Calpine (NYSE:CEG)은 The Geysers의 65주년을 2025년 10월 13일에 기념하며 1960년에 시작된 상업용 지열 사업의 6세대를 축하했습니다.

Calpine은 The Geysers의 45제곱마일에 걸쳐 13개의 지열 발전소를 운영하며 재생 가능 전기에너지를 생산하여 연간 약 725,000가구에 공급할 수 있습니다. 이 현장에는 Lake 및 Sonoma 카운티에서 약 300명 직원150명의 계약직가 고용되어 있습니다.

이 이정표를 기념하기 위해 Calpine은 양호 Lake Environmental Research Center에 $65,000를 기부하여 유역 보호, 산불 예방 및 서식지 복원을 지원했습니다.

Calpine (NYSE:CEG) a marqué le 65e anniversaire de The Geysers le 13 octobre 2025, célébrant six décennies d'opérations géothermiques commerciales qui ont commencé en 1960.

Calpine exploite 13 centrales géothermiques sur 45 miles carrés à The Geysers, produisant suffisamment d'électricité renouvelable pour alimenter environ 725 000 foyers par an. Le site emploie près de 300 employés et 150 prestataires dans les comtés de Lake et Sonoma.

Pour commémorer cet jalon, Calpine a fait don de $65,000 au Clear Lake Environmental Research Center pour soutenir la protection des bassins versants, la prévention des incendies de forêt et la restauration des habitats.

Calpine (NYSE:CEG) beging am 65. Jahrestag von The Geysers am 13. Oktober 2025 und feierte sechs Jahrzehnte kommerzieller Geothermie-Betriebe, die 1960 begannen.

Calpine betreibt 13 Geothermieanlagen über eine Fläche von 45 Quadratmeilen bei The Geysers und produziert genügend erneuerbare Elektrizität, um ungefähr 725.000 Haushalte pro Jahr zu versorgen. Die Anlage beschäftigt fast 300 Mitarbeiter und 150 Auftragnehmer in den Landkreisen Lake und Sonoma.

Um das Jubiläum zu würdigen, hat Calpine $65,000 an das Clear Lake Environmental Research Center gespendet, um den Schutz von Gewässergebieten, Waldbrandprävention und die Wiederherstellung von Lebensräumen zu unterstützen.

كالبين (NYSE:CEG) احتفلت بالـ الذكرى الخامسة وستون لـ The Geysers في 13 أكتوبر 2025، بمناسبة ستة عقود من العمليات الجيوحرارية التجارية التي بدأت في عام 1960.

تشغل كالبين 13 محطة جيوترالحرارية عبر 45 ميلاً مربعاً في The Geysers، وتنتج ما يكفي من الكهرباء المتجددة لتوفير الطاقة لحوالي 725,000 منزل سنوياً. الموقع يوظف نحو 300 موظف و 150 مقاولاً في مقاطعات Lake و Sonoma.

للاحتفال بهذا الإنجاز، تبرعت Calpine بـ $65,000 لـ Clear Lake Environmental Research Center لدعم حماية أحواض التصريف، والوقاية من حرائق الغابات، واستعادة المواطن الطبيعية.

Calpine (NYSE:CEG)65周年 的 The Geysers 于 2025 年 10 月 13 日举行了纪念活动,庆祝自 1960 年开始的六十年的商业地热运营。

Calpine 在 The Geysers 的 45 平方英里范围内运营 13 座地热发电厂,每年生产足够的可再生电力,供大约 725,000 个家庭 使用。该地点在 Lake 和 Sonoma 县雇佣近 300 名员工150 名承包商

为纪念这一里程碑,Calpine 向 Clear Lake Environmental Research Center 捐赠了 $65,000,以支持流域保护、野火预防与栖息地恢复。

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Commemorating Over Six Decades of the People, Power and Progress at the World's Premier Geothermal Resource

MIDDLETOWN, Calif., Oct. 13, 2025 /PRNewswire/ -- Calpine Corporation today announced the 65th anniversary of The Geysers, one of the world's largest and most productive geothermal energy sites. This milestone reflects more than six decades of innovation, partnership and sustainable power generation in Northern California.

Since commercial operations began in 1960, The Geysers has been at the forefront of California's energy transformation, producing reliable, around-the-clock renewable power using steam heated by the Earth's core. Today, Calpine's 13 geothermal power plants across the 45-square-mile terrain generate enough renewable electricity to power approximately 725,000 homes annually.

At the heart of The Geysers' success are the people who develop, operate and maintain geothermal production. Calpine has nearly 300 employees and 150 contractors who live and work in Lake and Sonoma Counties.  Their expertise and dedication to their craft have helped make The Geysers a global model for responsible geothermal development and a cornerstone of California's renewable energy portfolio.

"The success of The Geysers over the past 65 years is a testament to the people who have cared for it: hardworking, committed individuals who view stewardship as both a duty and a privilege," said Aimee Blaine, Calpine's Senior Vice President, Geothermal Region. "Together with our partners and community, we have built a deep connection to each other and this land. Our shared pride in this work has helped The Geysers remain a global leader in geothermal energy production and environmental responsibility."

To commemorate the special milestone, Calpine donated $65,000 to the Clear Lake Environmental Research Center (CLERC), a community-based non-profit focused on protecting and restoring the Clear Lake watershed and surrounding ecosystems. Working across Lake and Sonoma Counties, CLERC coordinates wildfire prevention and habitat restoration efforts. CLERC brings together science, education and collaboration with local partners and tribes to build a more resilient and sustainable future for Northern California.

"The Geysers has shown what's possible when innovation and stewardship go hand-in-hand," said Will Evans, Executive Director and Co-Founder of Clear Lake Environmental Research Center. "Calpine's continued investment in the community reflects a shared commitment to protecting the ecosystem that makes this region so extraordinary."

"Pumping out enough affordable clean energy to power more than 725,000 homes, The Geysers are truly a feat of engineering and dedication," said California State Senate President pro Tempore Mike McGuire. "And Calpine's commitment to expanding renewable energy while protecting our natural resources is proof that innovation and sustainability are perfect partners in the world's 4th-largest economy. 65 years is an incredible milestone for geothermal energy here in Lake and Sonoma counties, and we all look forward to what's ahead as the iconic Geysers continue to help shape California's transition to clean energy for the next generation."

About Calpine:
Calpine Corporation is America's largest generator of electricity from natural gas and geothermal resources with operations in competitive power markets. Our fleet of 79 energy facilities in operation represents over 27,000 megawatts of generation capacity. Through wholesale power operations and our retail businesses, we serve customers in 22 states and Canada. Our clean, efficient, modern and flexible fleet uses advanced technologies to generate power in a low-carbon and environmentally responsible manner. We are uniquely positioned to benefit from the secular trends affecting our industry, including the abundant and affordable supply of clean natural gas, environmental regulation, aging power generation infrastructure and the increasing need for dispatchable power plants to successfully integrate intermittent renewables into the grid. Calpine Corporation is a private corporation owned by a consortium of investors, led by Energy Capital Partners (ECP). This group also includes Access Industries and the Canada Pension Plan Investment Board. On January 10, 2025, Calpine announced entry into an agreement with Constellation (Nasdaq: CEG) under which Constellation will acquire Calpine. If you would like to learn more about Calpine, follow us: Linkedin.com/Calpine.

Cision View original content to download multimedia:https://www.prnewswire.com/news-releases/calpine-celebrates-65-years-of-the-geysers-302582053.html

SOURCE Calpine Corporation

FAQ

What did Calpine announce on October 13, 2025 about The Geysers (CEG)?

Calpine announced the 65th anniversary of The Geysers and highlighted its operations, workforce and community donation.

How many geothermal plants does Calpine operate at The Geysers (CEG)?

Calpine operates 13 geothermal power plants across the 45-square-mile Geysers area.

How much electricity does The Geysers produce according to Calpine's announcement?

Calpine said The Geysers generate enough renewable electricity to power approximately 725,000 homes annually.

What community contribution did Calpine make for The Geysers' 65th anniversary (CEG)?

Calpine donated $65,000 to the Clear Lake Environmental Research Center to support watershed and habitat work.

How many local workers support The Geysers operations mentioned by Calpine (CEG)?

The announcement cited nearly 300 employees and 150 contractors living and working in Lake and Sonoma Counties.

What community programs does the Clear Lake Environmental Research Center use Calpine's donation for?

The donation supports CLERC's work on Clear Lake watershed protection, wildfire prevention, and habitat restoration in Lake and Sonoma Counties.
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