In 1900, construction workers for the Hudson and Manhattan Railroad (H&M), the PATH's predecessor, had to navigate quicksand formed from the water of the former Minetta Creek above it.

[3] In 1907, the Degnon Contracting Company was building an extension to the H&M Railroad north of 9th Street and declared the water to have dried up, to the relief of area property owners who had previously spent thousands of dollars on pumps to rid their properties of water.

[5] After the September 11, 2001 attacks, which resulted in the destruction of the vital World Trade Center station, Ninth Street experienced serious overcrowding.

[7] The Port Authority would have spent $29.6 million on the project, which also included new entrances at the Christopher Street station.

Passengers travel down a number of stairwells and through a narrow curved tunnel before descending to the north end of the platform.