The new Willis Avenue Bridge drifted into New York harbor earlier this morning and slipped under the Brooklyn Bridge towards it’s new home in the Harlem River.

The 300-plus foot span arrived on the east river at 7:30 am atop two barges, moving at a snails pace to it’s final destination near East 124th Street where workers will preform final checks and install wiring before it replaces its 110-year-old predecessor in the Fall.

“It’s a historical moment. This doesn’t happen too often,” said Department of Transportation Commissioner Janette Sadik-Khan from pier 11 as the massive steel structure passed under the Brooklyn and Manhattan bridges, “It’s really a moment in time to see the newest piece of the city’s infrastructure pass under some of the city’s oldest infrastructures.”

The 2,400 ton bridge was built under a $614 million project to replace and improve existing bridges. Construction began three years ago upstate and was moved down the Hudson River last week in a 24-hour voyage. The structure will be installed in November and its predecessor will be dismantled and donated for any number of uses, including construction of artificial reefs.