65 ILCS 5/11-112-5

All taxes collected by virtue of Sections 11-112-3 through 11-112-8 shall be deposited in the municipal treasury to the credit of what shall be called the levee fund. This fund shall be kept separate and apart from all other funds or money of the municipality and shall be used and paid out only for the purpose specified in those sections. The money in this levee fund, as far as possible, shall be kept at interest by the municipality.