SANTA CLARA — For the second time in four months, tragedy has brought the blink-of-an-eye construction pace of the new 49ers stadium to a halt, after a worker was killed while unloading building materials at the site early Monday.

The Santa Clara County Medical Examiner-Coroner’s Office identified the worker as Edward Erving Lake II, a 60-year-old Vacaville resident. He was unloading a bundle of rebar — steel bars commonly used to reinforce concrete — from a flatbed truck when it fell on top of him, causing serious injuries, according to Cal-OSHA, the state’s workplace safety watchdog. He was taken to the hospital, where he was pronounced dead.

Project co-director Jonathan Harvey of Turner/Devcon said Santa Clara police and fire officials determined Lake’s death was accidental, and work is scheduled to resume Tuesday.

“While Cal-OSHA’s investigation is ongoing and could take months, they have told us that the job site has been deemed safe and is permitted to re-open,” the company said in a statement. “The site will open Tuesday morning. We will address our workers at that time and will also have the proper support systems in place to assist them in dealing with their emotions following this tragedy.”

Soon after the news surfaced, condolences came from Turner/Devcon, the project developer for the $1.2 billion Levi’s Stadium; Tampa-based Gerdau Ameristeel, the subcontractor that directly employed the man; and the San Francisco 49ers.

“Gerdau is saddened to confirm that an employee at our Napa Reinforcing Steel facility passed away after a serious incident this morning at the Levi’s Stadium construction site in Santa Clara,” a Gerdau statement said. “We extend our deepest sympathies to his family and friends during this difficult time. An investigation into the cause of the incident is underway.”

A statement from the 49ers said: “The 49ers organization learned this morning that an accident occurred involving a driver as he delivered materials to the stadium. Our sincerest thoughts and prayers are with the family, friends and co-workers affected by this tragedy.”

Cal-OSHA is investigating the deadly accident, along with the Santa Clara police and fire departments. The exact circumstances leading up to the death, which was reported about 6:30 a.m. at the site off Tasman Drive, remain unclear.

An area in the southern end of the stadium site was cordoned off early Monday as officers and firefighters maintained the scene.

The project is more than two-thirds done toward a July 2014 completion date after first breaking ground in April 2012.

Monday’s accident sadly echoed the events after the June 11 death of 63-year-old Donald White, an elevator technician who was fatally struck by a counterweight in an elevator shaft. Work was shut down for two days as a visibly shaken construction family mourned the loss.

Cal-OSHA spokeswoman Kathleen Hennessy said an investigation into White’s death did not yield any citations for misconduct. The agency described him as an experienced technician who was on a ladder and had sent his apprentice up the shaft to retrieve a tool, and that because there were no witnesses, it remains unknown why he didn’t move out of harm’s way.

Staff writer Eric Kurhi contributed to this report. Contact Robert Salonga at 408-920-5002. Follow him at Twitter.com/robertsalonga.