18th Century Ship Found At World Trade Center Site (VIDEO)

NEW YORK -- Workers at the World Trade Center site are excavating a 32-foot-long ship hull that apparently was used in the 18th century as part of the fill that extended lower Manhattan into the Hudson River.

It's hoped the artifact can be retrieved by the end of the day on Thursday, said archaeologist Molly McDonald. A boat specialist was going to the site to take a look at it.

McDonald said she wanted to at least salvage some timbers; it was unclear if any large portions could be lifted intact.

"We're mostly clearing it by hand because it's kind of fragile," she said, but construction equipment could be used later in the process.