An affiliate of Warren Buffett’s Berkshire Hathaway Inc. on Monday became the operator of the Cove Point liquefied natural gas (LNG) export terminal in Lusby, MD, as part of a $9.7 billion acquisition from Dominion Energy Inc.

The sale of the majority of the assets in the transaction announced in July were completed Monday, Richmond, VA-based Dominion management said.

Berkshire Hathaway Energy acquired 5,500 miles of interstate gas transmission pipelines and about 775 Bcf of storage, as well as a 25% stake and operating interest in Cove Point. The transaction value currently is estimated at $8 billion, comprising about $2.7 billion in cash and about $5.3 billion in debt transfer.

The planned sale of Dominion’s interests in the Questar Pipelines is expected to be completed...