Michigan Compiled Laws, Chapter 280. Drain Code of 1956 § 280.29

Sec. 29. The county shall furnish the commissioner with all necessary books and papers for use in the survey, and such office equipment as shall be necessary in making profiles, blueprints and specifications in any drainage district. The surveyor or engineer shall file with the commissioner all field notes, blueprints, profiles, estimates and all other papers in his possession relating to said drain. The board of supervisors of any county may employ an engineer who shall perform under this act the services required to be performed by an engineer or surveyor.