70 ILCS 605/3-14
The temporary commissioners shall, unless otherwise authorized by the court, employ an engineer who shall be a registered professional engineer competent in the design and operation of drainage systems, to assist them in the performance of their duties. If an engineer is employed, he shall make such surveys and estimates as the commissioners may direct. If the engineer recommends the organization of the district and the performance of work, and the temporary commissioners concur in this recommendation, then the engineer shall prepare a report, which report shall include (a) a description of the existing drainage facilities and conditions in the proposed district; (b) a description of the system of drainage which he recommends to be constructed by the district, giving the route, length and termini of proposed levees, open ditches and tile drains, the top elevations and dimensions of levees, the gradients, bottom widths and side slopes of proposed open ditches, the diameter and gradients of proposed tile drains, the type, plan, location and capacity of proposed pumping plants, and the nature and location of all other work or structures proposed for construction, operation or maintenance by the district; (c) specifications for the performance of the work recommended; (d) a description of the rights-of-way necessary for the performance of the work recommended; (e) completes estimates of costs; (f) a map of the proposed district, showing the boundaries described in the petition, any recommended changes in the boundaries and the nature and location of the proposed work; (g) such profile, cross-sectional and other drawings as may be necessary to describe the proposed work; and (h) the approximate number of acres in the proposed district and such other information as may be required by the commissioners.
70 ILCS 605/3-14