CARRIZO SPRINGS, Tex. — Dozens of migrant teens boarded vans Monday for the trip down a dusty road to a former man camp for oil field workers here, the first migrant child facility opened under the Biden administration.

The emergency facility — a vestige of the Trump administration that was open for only a month in summer 2019 — is being reactivated to hold up to 700 children ages 13 to 17.

But immigration lawyers and advocates question why the Biden administration would choose to reopen a Trump-era facility that was the source of protests and controversy. From the "tent city" in Tornillo, Tex., to a sprawling for-profit facility in Homestead, Fla., emergency shelters have been criticized by advocates for immigrants, lawyers and human rights activists over their conditions, cost and lack of transparency in their operations.

"It's unnecessary, it's costly, and it goes absolutely against everything [President] Biden promised he was going to do," said Linda Brandmiller, a San Antonio-based immigration lawyer who represents unaccompanied minors. "It's a step backward, is what it is. It's a huge step backward."