(70 ILCS 1855/2.4) (from Ch. 19, par. 452.4)

Sec. 2.4. "Port facilities" means all public structures, except terminal facilities as defined herein, that are in, over, under or adjacent to navigable waters and are necessary for or incident to the furtherance of water commerce and includes the widening and deepening of slips, harbors and navigable waters.

(Source: Laws 1961, p. 2993.)