Nine months after cracks were discovered in two structural steel beams of the Pelli Clarke Pelli Architects–designed Transbay Transit Center in San Francisco, the transit hub will finally reopen on July 1. However, busses won’t roll through the $2.2 billion terminal until the end of the summer; at first, only the 5.4-acre rooftop park will be open to the public.

The repair plan announced in January appears to have worked, and, according to the San Francisco Chronicle, the building was declared safe by a panel of engineers yesterday. The Metropolitan Transportation Commission, which covers the entirety of the San Francisco Bay Area, had determined that welding access holes in the two cracked beams had been incorrectly cut during construction, resulting in stress fractures. After the city paid $6 million in testing and $2.5 million a month in security for the closed center, contractors decided to reinforce the two affected beams, and two untouched beams they connect to, with steel plates.

Although the three-block-long transit center is safe to occupy again, the interior was stripped during the repairs and workers need more time to reinstall the ceiling and column coverings. Bus drivers, who had previously been picking up and dropping off passengers at a satellite terminal on Folsom Street a block away will need to be retrained as well. So in the meantime, fitness classes will resume on the transit center’s roof and pedestrians can once again explore the park.

Still, there’s no news on the progress to bring rail to the complex’s basement, which was built to accommodate high-speed trains but remains empty. No timeline or budget has been agreed upon for a BART and Caltrain extension to the Transbay Transit Center, although politicians and the Transbay Joint Powers Authority, the independent agency responsible for bringing rail to the station, have agreed upon the need to do so.