Mich. Comp. Laws § 560.188

Sec. 188. (1) If the subdivision includes or abuts certain improvements other than streets and alleys, such as county drains, lagoons, slips, waterways, lakes, bays or canals, which connect with or are proposed to connect with or enlarge public waters and such improvements are not in existence at the time of consideration by the governing body of the municipality, it may require, as a condition of approval of the final plat, the proprietor to enter into an agreement to construct such improvements within a reasonable time. (2) The governing body may require a cash deposit, certified check or irrevocable bank letter of credit whichever the proprietor selects, or surety bond acceptable to the municipality, covering the estimated cost of construction, to be deposited with the clerk of the municipality to insure the faithful performance of the agreement. Outlots or parks used as buffer strips, if between the boundary of the subdivision and such improvements, shall not alter the requirements of this section. (3) Any municipality may provide by ordinance for the installation of other improvements in addition to those required by this act. The governing body of the municipality, as a condition of approval of the plat, may require the proprietor to enter into an agreement, as provided in this section.