(Reuters) - Outgoing U.S. President Donald Trump’s administration is moving to loosen mining regulations and green light new mineral projects before leaving office this month, with successor Joe Biden unable to reverse some of the changes.

FILE PHOTO: U.S. President Donald Trump speaks during a rally to contest the certification of the 2020 U.S. presidential election results by the U.S. Congress, in Washington, U.S, January 6, 2021. REUTERS/Jim Bourg/File Photo

Administration officials tell Reuters they plan to publish a raft of decisions on Jan. 15 that will expand miners’ access to federal lands, give final approval to Lithium Americas Corp’s Nevada lithium mine and approve a land swap for a Rio Tinto Ltd Arizona copper mining project, among other steps.

Biden will be able to reverse some of Trump’s changes, especially proposed rules under regulatory review. But some of Trump’s steps will either be irreversible or require Biden to restart the rule-making process, a years-long effort, which is a concern to environmentalists.

“The Trump Administration’s midnight dance to aggressively push these proposed rules follows four years of gutting already weak community and environmental oversight of the hard rock mining industry,” said Lauren Pagel of Earthworks, an environmental advocacy group.

Trump administration officials are finalizing a rule change that would add mining to a list of industries that can receive fast-tracked permitting, part of a law signed by former President Barack Obama in 2015, according to government records here.

The law, known as FAST-41, was intended to streamline permitting for utility projects, such as power transmission lines.

“Congress never intended for FAST-41 to cover the mining sector,” U.S. Representative Raul Grijalva of Arizona, chairman of the House Natural Resources Committee, wrote to regulators late last month, attempting to stop the change.

Officials may also allow the storage of mine waste, known as tailings, on federal land. The proposed change would essentially codify an existing practice in an area of law that environmentalists say is vague.

The Bureau of Land Management, the federal agency considering the new rule, did not respond to a request for comment.

Several U.S. lawmakers have called for Trump’s immediate removal after his supporters stormed the U.S. Capitol on Wednesday. It is not clear if Vice President Mike Pence would continue Trump’s regulatory steps.

Trump could exercise his power under the Administrative Procedure Act, which stipulates how regulations are drafted and enforced, to finalize both proposals before he leaves office, a step that would require him to find “good cause” for the faster-than-normal approval.

The National Mining Association, an industry trade group, says it supports streamlining regulation, especially the FAST-41 changes.

“American mining is key to successfully repairing our nation’s infrastructure,” said Rich Nolan, the NMA’s president.

The Biden transition team said its incoming administration “will begin to take swift and bold action across the federal government to roll back harmful Trump Administration policies, including those impacting climate and environmental policies, on January 20 to halt or delay Trump’s damaging midnight regulations.”

Trump officials are also on the verge of approving several mining projects, or significantly advancing their regulatory review process.

One of those, the Lithium Americas Thacker Pass project in Nevada, is expected to be approved on Jan. 15, according to an official at the Bureau of Land Management.

“It’s been a good, collaborative process with state and federal authorities. We look forward to the decision,” said Jon Evans, chief executive of Lithium Americas, which has been developing the project for more than a decade. Lithium is a key component of electric vehicle batteries.