BALTIMORE (AP) — The first cargo ship passed through a newly opened deep-water channel in Baltimore on Thursday after being stuck in the harbor since the Francis Scott Key Bridge collapsed four weeks ago, halting most maritime traffic through the city’s port.

The Balsa 94, a bulk carrier sailing under a Panama flag, passed through the new 35-foot (12-meter) channel headed for St. John, Canada.

Its voyage marked an important step in the ongoing cleanup and recovery effort as salvage crews have been working around the clock to clear thousands of tons of mangled steel and concrete from the entrance to Baltimore’s harbor.

The ship is one of five stranded vessels expected to pass through the new, temporary channel, including one loaded car carrier. Other ships are scheduled to enter the port, which normally processes more cars and farm equipment than any other in the country.