Illinois Statutes Chapter 515. Fish § 5/15-105. Devices near spillways, fishways, lakes, and dams

(a) Except as otherwise provided in subsection (b), it shall be unlawful to use or operate any commercial devices within 300 yards above or below all spillways, fishways, or locks or dams of any type or in a manner that obstructs more than one-half the width of any stream or watercourse.

(b) A commercial fisherman may obstruct more than one-half the width of any stream or watercourse if: (i) the commercial fisherman is within sight of his or her gear and available to prevent boaters from contacting his or her nets; and (ii) the commercial fisherman places at least 2 fluorescent orange buoys that are at least 2 feet in diameter on the opposite side of the net from which the commercial fisherman is working to warn boaters of the presence of the commercial fisherman's nets.