San Francisco's Transbay Transit Center is set to reopen on July 1, nearly 10 months after cracks discovered in the brand-new $2.2 billion bus terminal led to its closure last September.
On Tuesday the Transbay Joint Powers Authority, which oversees the center, announced the reopening date a day after a panel of engineering experts tasked with investigating the building's safety told the mayors of San Francisco and Oakland that the center was structurally sound and can reopen.
"We are pleased to welcome the public back to the transit center and sincerely apologize for the inconvenience this temporary closure has caused," said San Francisco Public Works Director Mohammed Nuru, who also chairs the Transbay Joint Powers Authority board of directors, in a statement.
The center was shut down on Sept. 25 after workers discovered cracks in a pair of steel girders that help support the building's bus deck where it crosses above Fremont Street. When it closed, the center had been open for bus service for just 44 days.
In the following weeks, as crews began inspecting the rest of the massive structure, San Francisco Mayor London Breed and Oakland Mayor Libby Schaaf asked the Bay Area agency that coordinates transportation planning and financing to provide an independent analysis of the cracks and their repair.

Last December, investigators determined that cutting torches used to make access holes for welding introduced "micro-cracks" in the steel girders, leading to the failure.
The Metropolitan Transportation Commission assembled a peer review panel. That group has signed off on the building restarting operations after a long series of fixes and inspections were completed.
"We agree that the steel structure is ready for service," Therese McMillan, executive director of the MTC, wrote in a letter to the mayors of San Francisco and Oakland on Monday. "The Transbay Transit Center's girder problem was isolated and ... the appropriate repairs have been performed."
MTC officials say the cracked portions have been repaired and the building's design features similar to those pieces have been strengthened.
Read McMillan's letter:

