Northeast natural gas spot markets supplied by Transcontinental Gas Pipe Line Co. LLC’s (Transco) Regional Energy Access (REA) expansion project are showing signs of less volatility since the project’s partial start-up in late October.

The REA added 450 MMcf/d of capacity along Transco’s existing Leidy Line that runs to Transco Zone 6 non-NY in southeastern Pennsylvania and New Jersey. The upstream Transco-Leidy Line hub usually prices as a discount.

Gas flows on the Leidy Line through Station 515 have increased by around 0.5 Bcf/d since the partial in-service of the REA. Total volumes averaged around 2.47 Bcf/d in November and around 2.52 Bcf/d in December through Dec. 27, up from around 1.79 Bcf/d in October.

“The increase in flows into Pennsylvania and New Jersey...