Mich. Comp. Laws § 280.511

Sec. 511. Whenever used in this chapter, except when otherwise indicated by the context: (a) "State" means this state. (b) "Public corporation" includes this state, counties, cities, villages, townships, metropolitan districts and authorities created by or pursuant to state statutes. (c) "Agencies" includes those officers, boards, commissions and other bodies created by public corporations or by the federal government, which are authorized to act in their own names. (d) "Director of agriculture" means the director of the state department of agriculture. (e) "Intercounty drain" means any drain, irrespective of size, carrying drainage water or sewage originating in more than 1 county, and includes drains located, established and constructed by a county drain commissioner or drainage board, by a city, village or township.