Wis. Stat. § 87.076: Financing.

Any flood control project other than a project described in s. 87.04 (2) may, in addition to any other method of financing mentioned in this chapter, be financed from funds received in whole or in part by the flood control board from any governmental agency or other person. To implement this section, every municipality may obtain and provide funds for a flood control project:

(1) By levying a special assessment as provided in s. 66.0703.

(2) By borrowing money and issuing bonds as provided in ch. 67.

(3) By grants or donations.

(4) By exercise of the general power of taxation.