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ENSTOR Expands Waha, Acquires Grama Ridge

ENSTOR Expands Waha, Acquires Grama Ridge

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May 12, 2005

HOUSTON, Texas – ENSTOR, a unit of ScottishPower, announced today the acquisition of the Grama Ridge Gas Storage Facility in New Mexico from ConocoPhillips and the expansion of its proposed Waha Gas Storage and Transportation Facility development in west Texas.

“Our open seasons show that demand for gas storage is increasing as customers seek ways to deal with natural gas price volatility,” said Matt Morrow, ENSTOR’s president.  “ENSTOR is ready to meet the growing demand with the Grama Ridge purchase and by expanding our plans for the nearby Waha facility from the earlier announced 7.2 Bcf to 9.5 Bcf.”

ENSTOR also plans to expand the 4.5 Bcf Grama Ridge reservoir facility, which has operated since the early 1970s, to 6.0 BCF.  Grama Ridge sits within 80 miles of the Waha project and interconnects with El Paso, NGPL, and Northern Natural gas transmission systems.  Waha also interconnects with El Paso and Northern Natural. 

ENSTOR’s gas storage business also includes the Katy Storage and Transportation Facility in Katy, Texas. The Katy facility, located 20 miles west of Houston, has a working capacity of 21 Bcf.  Katy has been in operation for more than 10 years, has interconnects to 13 pipelines and serves gas storage capacity to a diversified customer base throughout the U.S. The storage business also includes the proposed Houston Hub and Transportation Facility in Liberty County, Texas. This salt dome project received nearly 11.5 Bcf of support during the open season. The project is in the process of filing permits for the 18 Bcf storage facility.

ScottishPower also owns the Alberta Hub.  In operation since 1997, the Alberta Hub is a major underground gas storage facility located 80 miles west of Edmonton, Alberta, Canada. It is connected to the largest pipeline in the province, TransCanada Pipelines Limited – Alberta System, which has the capability to access markets in California, the Pacific Northwest, Midwest, Northeast and all of Canada.  The storage facility currently serves producers, utilities, natural gas marketing companies and other customers.

About Avangrid

About Avangrid: Avangrid, Inc. (NYSE: AGR) aspires to be the leading sustainable energy company in the United States. Headquartered in Orange, CT with approximately $44 billion in assets and operations in 24 U.S. states, Avangrid has two primary lines of business: networks and renewables. Through its networks business, Avangrid owns and operates eight electric and natural gas utilities, serving more than 3.3 million customers in New York and New England. Through its renewables business, Avangrid owns and operates a portfolio of renewable energy generation facilities across the United States. Avangrid employs approximately 8,000 people and has been recognized by JUST Capital in 2021, 2022, 2023 and 2024 as one of the JUST 100 companies – a ranking of America’s best corporate citizens. In 2024, Avangrid ranked first among utilities and 12 overall. The company supports the U.N.’s Sustainable Development Goals and was named among the World’s Most Ethical Companies in 2024 for the sixth consecutive year by the Ethisphere Institute. Avangrid is a member of the group of companies controlled by Iberdrola, S.A. For more information, visit


About Iberdrola: Iberdrola is one of the world's biggest energy companies and a leader in renewables, spearheading the energy transition to a low carbon economy. The group supplies energy to almost 100 million people in dozens of countries. With a focus on renewable energy, smart networks and smart solutions for customers, Iberdrola’s main markets include Europe (Spain, the United Kingdom, Portugal, France, Germany, Italy and Greece), the United States, Brazil, Mexico and Australia. The company is also present in growth markets such as Japan, Taiwan, Ireland, Sweden and Poland, among others.

With a workforce of nearly 40,000 and assets in excess of €141.7 billion, across the world, Iberdrola helps to support 400,000 jobs across its supply chain, with annual procurement of €12.2 billion. A benchmark in the fight against climate change, Iberdrola has invested more than €130 billion over the past two decades to help build a sustainable energy model, based on sound environmental, social and governance (ESG) principles.

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