Section 87.10 - Collection of assessments; bonds(1) Upon the making of a final order directing the work to proceed, as provided in s. 87.07, the department shall forward a certified copy of its findings and the order based thereon to the clerk of each town, village and city in which any land or other property benefited by the improvement is located; to the clerk of each public corporation owning property found to be benefited thereby, and to the clerk of each town, village and city found to be located within the drainage area. It shall thereupon be the duty:(a) Of each town, village and city in which is located any benefited land owned otherwise than by a public corporation, or in which is located any benefited property of a public service corporation, to levy as a special assessment against the land or other property so benefited the amount which the department has found that such property should contribute to the cost of the improvement, and to collect the same in connection with the next ensuing collection of general taxes in said town, village or city. The governing body of such town, village or city may, in its discretion, make such special assessment payable in annual installments;(b) Of each public corporation owning property found by the department to be benefited, to raise the amount which the department shall have found that such property should contribute to the cost of the improvement;(c) Of each town, village or city containing lands or other property found to be benefited by the improvement, to raise the amount which the department shall have found such town, village or city should contribute to the cost of the improvement;(d) Of each town, village or city within the drainage area, to raise the amount which the department shall have found such town, village or city should contribute to the cost of the improvement.(2) The amount required to be raised by any public corporation pursuant to sub. (1) (b), (c) and (d) of this section may be raised by the issuance of bonds or by the levy of general taxes, or may be paid out of any funds of such public corporation legally available for such purpose; provided, however, that no bonds shall be issued until provision has been made to pay the liability that will accrue thereunder. Every public corporation electing to raise such sums wholly or in part by general taxation may lawfully do so, even though the tax rate of such public corporation for the year of such levy may thus be increased beyond the legal limit otherwise applicable. The moneys to be provided by any public corporation pursuant to this section, except the deferred installments of special assessments, shall be on hand and available by March 15 following the department's final order, unless the time between the certification of such order and March 15 is insufficient for the raising of such moneys. All such moneys shall be held by the treasurer of such public corporation in a separate fund until paid over to the flood control board created pursuant to s. 87.12.