The proposal would affect more than two million miles of gas distribution lines in the U.S. It was spurred by a fatal 2018 gas explosion in Massachusetts.
States say Federal Energy Regulatory Commission did not consider New Jersey's claims that added capacity was not needed and would violate its climate change law.
A new Interior Dept. rule largely echoes changes made in the wake of the 2010 Deepwater Horizon disaster that were later walked back under the Trump administration.
But damage and economic impact cost could reach $6 billion, says a Moody's estimate, as President Joe Biden releases funds for emergency repairs and announces FEMA official as federal coordinator for long-term reconstruction
State DOT dumps stalled $7.3B private developer approach of previous administration, but with public funding not in hand, design and construction is years away.
Nearly 20 years after beginning construction and $1.23 billion later, the U.S. Army Corps of Engineers' Charleroi Lock and Dam in Monessen, Pa., is scheduled to be completed later this year.