820 ILCS 245/1

in effect

(820 ILCS 245/1) (from Ch. 48, par. 261) Sec. 1. When used in this Act, unless the context indicates otherwise, the term (a) "Caisson" means a wood, steel, concrete or reenforced concrete air-tight and water-tight chamber in which it is possible for men to work to excavate material. (b) "Lock" means a chamber designed to facilitate the passage of men and materials from an air pressure greater than normal, as in a compartment, caisson or tunnel, to the ground or water level or normal air pressure. (c) "Pressure" means gauge air pressure in pounds per square inch. (d) "Tunnel" means a subterranean passage or chamber. (Source: Laws 1939, p. 614.)

Source: Open US Law by Vaquill AI (CC BY 4.0)URL: https://www.ilga.gov/legislation/ilcs/ilcs.aspFetched: 10/17/2026