Heres the word on the waterfalls from About.com’s Brooklyn page written by Kristin Goode:

The city has been buzzing lately with news of a major new work of public art that will be on display for the next few months. The project, called The New York City Waterfalls, will be “live” from June 26 to October 13 and will consist of four large (90- to 120-feet tall!) man-made waterfalls, all installed throughout Brooklyn, Manhattan, and Governors Island.

A product of artist Olafar Eliasson, one of the four waterfalls will live near the Brooklyn side of the Brooklyn Bridge, and another one will be between Piers 4 and 5 near Joralemon Street in Brooklyn Heights. The falls will run between 7am and 10pm, seven days a week. They’ll also be lit after sunset.

Here’s an interesting interview on video with Olafar Eliasson from the New York Times.