Woodbridge, New Jersey
The construction of the tubes of the Hudson & Manhattan Railroad that linked Manhattan with New Jersey.
It is the engineering feat of the H&M tubes which I nominate for New York in 10 Objects. It is important to note the tubes are not tunnels. The tubes still stand today, in continuous use for more than 100 years.
While New York Central Railroad owner Cornelius Vanderbilt may have uttered "The public be damned," H&M President William McAdoo said "The public be pleased," and they were.