Mich. Comp. Laws § 280.125
At such meeting the respective commissioners shall hear the proofs and allegations offered and shall reconsider and review the descriptions of land in that county forming a part of the drainage district, the apportionment of benefits, and define and equalize the same as may seem just and equitable. The persons entitled to appear and offer proof may appeal from such review and the manner of taking such appeal shall be as prescribed in chapter 7 of this act, being sections 151 to 161, inclusive.
Bids shall be received and computation of the total cost of the drain shall be made, as hereinafter provided, before the time set for review of the apportionment, and such computation shall be open to inspection at the time of review. If such computation shall not be completed before the day of review, such review may be adjourned from time to time, not more than 20 days in all for the completion of such computation, or a new hearing may be called with like notice by publication, posting and service at least 10 days before such hearing. If for any reason the contracts on which such computation was based shall not be executed and new contracts shall be let at a higher price, a corrected computation shall be made and a new review held with like notice.
MCL 280.125