President Donald Trump ordered the review last month, saying protections imposed by his three immediate predecessors amounted to "a massive federal land grab" that "should never have happened."
A list released yesterday includes 22 monuments on federal land in 11, mostly Western states, including Bears Ears and Grand Staircase-Escalante in Utah, Nevada's Basin and Range and Katahdin Woods and Waters in Maine.
The review also targets five marine monuments in the Atlantic and Pacific Oceans, including a huge reserve in Hawaii established in 2006 by President George W Bush and expanded last year by President Barack Obama.
Trump said the protections imposed by his predecessors "unilaterally put millions of acres of land and water under strict federal control, eliminating the ability of the people who actually live in those states to decide how best to use that land."
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The land-controls have "gotten worse and worse and worse, and now we're going to free it up, which is what should have happened in the first place," Trump said at a signing ceremony marking the executive order.
In December, shortly before leaving office, Obama infuriated Utah Republicans by creating the Bears Ears National Monument on more than 1 million acres of land that's sacred to Native Americans and home to tens of thousands of archaeological sites, including ancient cliff dwellings.
Republicans in the state asked Trump to take the unusual step of reversing Obama's decision. They said the monument designation will stymie growth by closing the area to new commercial and energy development.
Trump's order also targets the Grand Staircase-Escalante National Monument in Utah, created by Clinton in 1996, and Katahdin Woods and Waters in Maine, created last year by Obama. At 87,500 acres, Katahdin is the only one of the 22 monuments under review that is smaller than 100,000 acres, the minimum size designated by the order.
The Interior Department said Katahdin will be reviewed under a provision that singles out whether a monument was created or expanded without adequate public outreach and coordination with relevant stakeholders.
Interior Secretary Ryan Zinke has been directed to produce an interim report next month and make a recommendation on Bears Ears, and then issue a final report within 120 days.
Zinke is traveling to Utah tomorrow and will visit Bears Ears and Grand Staircase.
Members of a coalition of five Western tribes that pushed for the Bears Ears designation have said they're outraged the Trump administration will review a decision they say was already carefully vetted by the Obama administration, including a multi-day visit last year by then-Interior Secretary Sally Jewell.