WASHINGTON (AP) — The Trump administration is restoring jobs for dozens of National Park Service employees fired amid government-wide reductions and hiring nearly 3,000 additional seasonal workers, following an uproar over an aggressive plan to downsize the agency.

At least 50 jobs are being restored to help maintain and clean parks, educate visitors and collect admission fees, according to two people familiar with the agency’s plans who spoke on condition of anonymity because they were not authorized to speak publicly on the matter.

The moves come as the park service said in a new memo that it will hire up to 7,700 seasonal positions this year, up from about 5,000 promised earlier this week and higher than the three-year average of 6,350 seasonal workers. The park service has about 20,000 employees.

Lawmakers and advocacy groups have criticized the widespread layoffs as unnecessary and a threat to public safety and the parks themselves. Colorado’s Florissant Fossil Beds National Monument, which is located west of Colorado Springs and gets about 70,000 visitors annually, announced on social media that effective Monday it will close two days a week due to “lack of staffing.”

Seasonal workers are routinely added during warm-weather months to serve more than 325 million visitors who descend on the nation’s 433 parks, historic sites and other attractions yearly. Park advocates say the permanent staff cuts will leave hundreds of national parks — including some of the most well-known and most heavily visited sites — understaffed and facing tough decisions about operating hours, public safety and resource protection.

A spokesperson for the Interior Department declined to comment Friday. No one at the park service responded to an email from The Associated Press.

President Donald Trump has not nominated a park service director, a position that requires Senate confirmation. Jessica Bowron, the agency’s comptroller, has been named acting director.