The 1, 2, and 3 subway service was fully operational Thursday morning after a water main break turned the 14th street station into Niagara Falls the night before.

The neighborhood around the intersection is still a mess and Seventh Avenue is a crawl with just one lane open.

Crews could be seen removing decrepit, corroded pieces of the main, which the FDNY said may have been broken by Con Ed workers on a job at 13th Street and Seventh, according to NBC New York .

FDNY Battalion Chief John Porretto told reporters the station flooded with 18 inches of water. The MTA worked throughout the night to bring back full service, which had been limited between 42nd and Chambers.

About 500 passengers had to be evacuated. Local residents are still without water as the city works to put in a new 12-inch main.

Follow John A. Oswald on Twitter @nyc_oz.