Gregory Korte

USA TODAY

Corrections and clarifications: Based on information from the National Park Service and released by the White House, a previous version of this story erroneously included the World War II Valor in the Pacific National Monument on a list of sites subject to the executive order. According to Proclamation 8327, the monument is 6,310 acres – not square miles – and therefore would not meet the 100,000-acre threshold in the executive order, the Department of the Interior says.

WASHINGTON — At least two dozen national monuments are at risk of losing their federally protected status as a result of President Trump's executive order asking for an unprecedented review of their designations.

Under the 1906 Antiquities Act, either Congress or the President can protect federal lands by designating them as a national monument. And while Congress has occasionally revoked that status for existing monuments, no president ever has. Trump's order opens the door to that possibility.

Trump is targeting all or part of monuments that make up 100,000 acres or more, and were created by presidential proclamation since 1996. The White House released a list of 24 of them on Wednesday. They are:

► Grand Staircase-Escalante National Monument in Utah, proclaimed by President Clinton in 1996. (1.7 million acres).

► Grand Canyon-Parashant National Monument in Arizona, proclaimed by Clinton in 2000 (1 million acres).

► Giant Sequoia National Monument in California, proclaimed by Clinton in 2000 (327,769 acres).

► Vermilion Cliffs National Monument in Arizona, proclaimed by Clinton in 2000 (279,568 acres).

► Hanford Reach National Monument in Washington, proclaimed by Clinton in 2000 (194,450 acres).

► Canyons of the Ancients National Monument in Colorado, proclaimed by Clinton in 2000 (175,160 acres).

► Ironwood Forest National Monument in Arizona, proclaimed by Clinton in 2000 (128,917 acres).

► Sonoran Desert National Monument in Arizona, proclaimed by Clinton in 2001 (486,149 acres).

► Upper Missouri River Breaks National Monument in Montana, proclaimed by Clinton in 2001 (377,346 acres).

► Carrizo Plain National Monument in California, proclaimed by Clinton in 2001 (204,107 acres).

► Papahanaumokuakea Marine National Monument in the Pacific Ocean, proclaimed by President George W. Bush in 2006 and expanded by President Barack Obama in 2016, (89.6 million acres).

► Marianas Trench Marine National Monument in the Pacific Ocean, proclaimed by Bush in 2009 (60.9 million acres).

► Pacific Remote Islands Marine National Monument in the Pacific Ocean, proclaimed by Bush in 2009 and enlarged by Obama in 2014. (55.6 million acres).

► Rose Atoll Marine National Monument in American Samoa, proclaimed by Bush in 2009 (8.6 million acres).

► Rio Grande del Norte National Monument in New Mexico, proclaimed by Obama in 2013. (242,555 acres).

► Organ Mountains-Desert Peaks National Monument in New Mexico, proclaimed by Obama in 2014 (496,330 acres).

► Basin and Range National Monument in Nevada, proclaimed by Obama in 2015 (703,585 acres).

► Berryessa Snow Mountain in California, proclaimed by Obama in 2015 (330,780 acres).

► Northeast Canyons & Seamounts Marine National Monument in the Atlantic Ocean, proclaimed by Obama in 2016 (3.1 million acres).

► Mojave Trails National Monument in California, proclaimed by Obama in 2016 (1.6 million acres).

► Bears Ears National Monument in Utah, proclaimed by Obama in 2016 (1.4 million acres).

► Gold Butte National Monument in Nevada, proclaimed by Obama in 2016 (296,937 acres).

► Sand to Snow National Monument in California, proclaimed by Obama in 2016 (154,000 acres).

One other national monument meets the 100,000-acre threshold but was not included on the White House list:

► The San Gabriel Mountains National Monument in California, proclaimed by Obama in 2014 (346,177 acres).

Unlike the other monuments, which are managed by the Interior Department, San Gabriel is managed by the Forest Service, part of the U.S. Department of Agriculture. Zinke spokeswoman Heather Swift said she could not rule out action on San Gabriel. The Department of Agriculture did not respond to an inquiry about the status of the monument.



The executive order also allows for a review of sites smaller than 100,000 acres “where the Secretary determines that the designation or expansion was made without adequate public outreach and coordination with relevant stakeholders.”