Mich. Comp. Laws § 108.3: Board of public works; powers and duties.

Sec. 3.

The said board of public works, subject to the direction of the council, is hereby charged and entrusted with the following duties, powers and responsibilities:

First, The construction, management, supervision and control of such waterworks as are or shall be owned by the city;

Second, The construction, management, supervision and control of such electric or other lighting plants as are or shall be owned by the city;

Third, The management and supervision of the sewers, sewerage system and drainage of such city, and of the construction thereof.

Fourth, Such other public improvements or works as the common council may, by ordinance, place under their management, supervision and control.