Someone falling to their death in a manhole "ordinarily does not occur in the absence of negligence," the lawsuit said.
Police say an unknown number of people removed a manhole cover and went in.
The liquid was oozing out of sewer grates in Lower Manhattan as seen in a video posted on X.
Fittingly, the sculpture is entitled "N.Y.C Legend," and will be on display until June 2024.
While the cover did not hit anyone, the force of the explosion was so intense that it shattered the front window of one man's apartment.
A woman was returning home Monday night when the ground underneath her feet opened and swallowed her partially down a manhole in New Jersey.