87.075(4)(e) (e) Annually on or before March 15, assess the cost of construction, maintenance and operation of the project against the municipalities involved in the proportion that the equalized assessed value of real property located in the floodplain of the portion of the waterway in each municipality involved, exclusive of public park lands, bears to the total of such equalized assessed value for all municipalities involved. Such assessment shall be based upon data furnished by local assessors who shall forward to the secretary of the flood control board all data requested, by certified mail, within 30 days from receipt of such request. In the event the local assessor shall fail to comply with such request within the time specified, the flood control board shall conduct whatever studies are necessary in its judgment to determine the equalized assessed value of affected lands within such municipality, and the cost of such studies shall be charged to such municipality. When the flood control board determines the amount each municipality is required to pay, it shall certify that amount to each respective municipality. It shall thereupon be the duty of each municipality to pay said amount to the flood control board not later than 60 days from receipt of such certificate. The municipality may raise the funds required in the manner provided in s. 87.076.

87.075(5) (5) The flood control board appointed under this section shall have all powers contained herein as well as other sections of this chapter. In the event of conflict between the provisions of this section and other sections of this chapter, the provisions of this section shall control.

87.076(1) (1) By levying a special assessment as provided in s. 66.0703.

87.076(2) (2) By borrowing money and issuing bonds as provided in ch. 67.

87.076(3) (3) By grants or donations.

87.076(4) (4) By exercise of the general power of taxation.

87.08 87.08 Petition of board; modification of order, court review. Upon petition of the flood control board organized pursuant to s. 87.12 for the purpose of carrying out the final order of the department, the department may at any time, after public hearing, modify its final orders insofar as the same relate to the plans and specifications therein adopted by it for the construction of the improvement, but no such modification shall materially change the basic plan of the improvement. The hearing upon application for such modification shall be held upon notice to the clerk of each town, village and city containing property found by the department to be benefited by the improvement. Such order for modification may be reviewed in the same manner as the final order.

87.085 87.085 Federal cooperation. Any public corporation or flood control board acting under its powers and in conformity with state law may enter into an agreement with an agency of the federal government to cooperate in the construction, operation or maintenance of any federally authorized project contemplated under this chapter or to assume any potential liability appurtenant to such project and may do all things necessary to consummate the agreement. Such public corporation or flood control board may jointly or separately enter into such an agreement with an agency of the federal government carrying such terms and provisions concerning the division of costs and responsibilities as may be mutually agreed upon.

87.10(1) (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:

87.10(1)(a) (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;

87.10(2) (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.

87.11(1)(1) If, after all contracts for construction of the improvement have been let, the aggregate of the contract prices, as certified by the flood control board created pursuant to s. 87.12, added to the department's estimated cost of acquiring the necessary lands and of overhead expense and of the first 18 months' operation and maintenance, exceeds the amount estimated by the department as the total cost of the improvement, but is less than the total amount found by the department to be collectible under s. 87.09, the work of constructing the improvement shall nevertheless proceed and the several public corporations shall provide, not later than the time fixed for the next ensuing general tax collection therein, the amounts required to make up the deficiency, in the same proportions as the original amounts were provided by such public corporations.

87.11(2) (2) But should the total cost, as ascertained and certified by the flood control board after the letting of the contracts, in the manner hereinabove set forth, exceed the total amount found by the department to be collectible under s. 87.09, all contracts for the construction of the work shall be null and void. At the expiration of one year after such certification, any moneys held by the state treasurer on account of the project shall be refunded to the persons by whom they were paid to such treasurer; and funds in the hands of the flood control board shall be refunded to the public corporation by which they were paid to such board; any funds held by any town, village or city, having been collected by special assessments against property benefited, shall be refunded to the owners of such property; any funds raised by any public corporation by the issuance of bonds on account of such proposed improvements shall constitute a fund for the retirement or payment of such bonds; and any fund held by any public corporation, having been raised otherwise than by special assessments or bond issues, shall be available for the general purposes of such public corporation. Provided, however, that if within one year after the last mentioned certification of the flood control board there shall be deposited with the treasurer of said board a sum equal to the difference between the aggregate cost of constructing the improvement as estimated by the department and the aggregate cost thereof as determined and certified by the flood control board after the letting of the contracts, said board shall proceed to relet the contracts for the construction of the improvement and to complete the same unless the aggregate of such new contract prices, together with the department's estimate of the cost of acquiring lands and of overhead expenses and of the first 18 months' operation and maintenance, shall again exceed the amount found by the department to be collectible under s. 87.09. The deposit herein referred to may be made by any person or any public or private corporation.

87.11(3) (3) If, after the letting of the contracts and during the progress of the work, it develops that the cost of completing the work exceeds the amount available therefor, the flood control board may borrow temporarily the amounts required for completing the work, upon promissory notes executed by the board, payable with interest on or before the 15th day of March next ensuing; and each town, village and city containing property found by the department to be benefited by the improvement shall upon certification of the flood control board as to the amount to be raised by such town, village or city to repay such temporary loan, include in its next general tax levy the amount so certified. Such certification by the flood control board shall require each such town, village and city to raise the same proportion of the sum required to pay the temporary loan as the total amount previously contributed by such town, village or city pursuant to s. 87.10 (1) (c) bears to the total amount contributed by all of such towns, villages and cities thereunder. If, by reason of the deferred collection of special assessments as authorized in s. 87.10 (1) (a), funds shall be required by the board before they are actually available, the board may borrow such funds upon its promissory notes payable with interest on or before March 15 of the year in which such deferred installments become due, and shall repay such loan out of the proceeds of such installments.