70 ILCS 2605/19
Every sanitary district shall be liable for all damages to real estate within or without such district which shall be overflowed or otherwise damaged by reason of the construction, enlargement or use of any channel, ditch, drain, outlet or other improvement under the provisions of this act; and actions to recover such damages may be brought in the county where such real estate is situated, or in the county where such sanitary district is located, at the option of the party claiming to be injured. And in case judgment is rendered against such district for damage, the plaintiff shall also recover his reasonable attorneys' fees to be taxed as costs of suit: Provided, however, it shall appear on the hearing of plaintiff's motion to tax such attorney's fees, that the plaintiff notified the trustees of such district, in writing, at least 60 days before suit was commenced by leaving a copy of such notice with some one of the trustees of such district, stating that he claims damages to the amount of .... dollars by reason of (here insert the cause of damage) and intends to sue for the same: And, provided further, that the amount recovered shall be larger than the amount offered by said trustees (if anything) as a compromise for damages sustained.
70 ILCS 2605/19