Individuals arrested at the Democratic National Convention will be processed at an industrial warehouse with chain-link cells topped by razor wire, a facility some have compared to the U.S. prison at Guantanamo Bay.

Groups planning marches, concerts and other events during the Aug. 25-28 convention dub the center “Gitmo on the Platte,” for the nearby South Platte River.

The Denver sheriff’s office, which operates city and county jails, insists anyone taken to the center will be there only a few hours while they’re fingerprinted, issued a court date and released after posting bail. Others will be transferred to facilities designed for longer detentions.

Lindy Eichenbaum Lent, senior advisor to Mayor John Hickenlooper, said the warehouse was formerly used to store election equipment and construction was still underway to convert it to a processing center. She said the center was an effort to allay fears that those arrested would spend several unnecessary hours waiting to be processed.

Hickenlooper’s office said police will ask people to voluntarily comply with their orders before arresting anyone. “The city does not anticipate the need for widespread arrests,” the mayor’s office statement said. But it noted “the intention of some organizations to deliberately get arrested.”

The American Civil Liberties Union and the People’s Law Project have been talking with the city about giving attorneys access to detainees. The city said attorneys can meet clients in court, not at the facility.

ACLU-Colorado legal director Mark Silverstein said city officials told him detained protesters will be taken by bus to the facility, about two miles northeast of downtown. Those who are unable or refuse to post bail will be taken to a downtown city jail to await a court date.

Denver police working the convention will make as much as $1.2 million in overtime pay, city officials said. Budget estimates were released Friday and are part of the $50 million federal grant to cover convention security costs.