PHOENIX — The U.S. government plans on replacing barriers through 100 miles of the southern border in California and Arizona, including through a national monument and a wildlife refuge, according to documents and environmental advocates.

The Department of Homeland Security on Tuesday again waived environmental and dozens of other laws to build more barriers along the U.S.-Mexico border.

Funding will come from the Defense Department following the emergency declaration that President Donald Trump signed this year after Congress refused to approve the amount of border wall funding he requested.

Barriers will go up at Organ Pipe Cactus National Monument, a vast park named after the unique cactus breed that decorates it, and Cabeza Prieta National Wildlife Refuge, which is largely a designed wilderness home to 275 wildlife species. The government willsmuggling that over half the park was closed to the public. But illegal crossings in that area dropped off significantly in the past several years, and the government in 2015 reopened the entire monument for the first time in 12 years.

While Arizona has seen an increase in border crossers over the last year, most are families who turn themselves in to Border Patrol agents. The number of drugs that agents seize in the state has also dropped significantly.

But the government is moving forward with more border infrastructure.

The waivers the department issued Tuesday are vague in their description of where and how many miles of fencing will be installed. The Center for Biological Diversity says the plans total about 100 miles (160 kilometers) of southern border in both Arizona