Using a giant crane and working around the clock, the search continued on Sunday for a worker who fell into a Miami-Dade silo filled with tightly-packed cement dust.

Presumed dead is Pierre Mezidor, 58, of North Miami.

On the third day of the search, Mezidor’s family and friends kept vigil waiting for news from the Medley plant at 11000 NW 121st Way.

Mezidor fell when the metal roof of the giant silo at Titan America collapsed under him as he measured the level of the dry cement powder inside Friday morning. Mezidor dropped at least 140-feet. At first, firefighters rushed to try to rescue Mezidor; by Friday afternoon it was apparent he had been swallowed up by the cement.

On Sunday, a large 300-ton crane brought in to speed up the process of recovering his body worked to remove large debris from inside the silo, said Kate McClain, a Titan spokeswoman.

“Recovery efforts continue day and night,” said McClain in a Sunday e-mail.

The crane was helping remove duct, pipe, beams, handrails and metal panels from inside the damaged silo, said Department of Labor spokesman Jesse Lawder on Sunday. The department’s Mine Safety and Health Administration

MSHA is investigating the accident.

The debris that is being removed from inside the silo is being stored in a designated area on site, Lawder said.

Mezidor, who is from Haiti, had been an employee at the plant for 19 years, his family said.

Titan released a statement saying the company leaders “deeply regret the incident and emphasize that employee safety is their primary concern.”