(605 ILCS 5/9-115.1) (from Ch. 121, par. 9-115.1)
    Sec. 9-115.1. It is unlawful for any person to construct or cause to be constructed any drainage facility for the purpose of the detention or retention of water within a distance of 10 feet plus one and one-half times the depth of any drainage facility adjacent to the right-of-way of any public highway without the written permission of the highway authority having jurisdiction over the public highway.
    It is unlawful for any person to construct or cause to be constructed any earthen berm such that the toe of such berm will be nearer than 10 feet to the right-of-way of any public highway without the written permission of the highway authority having jurisdiction over the public highway.
(Source: P.A. 86-616.)