Mich. Comp. Laws § 280.560
The board shall secure the approval of the Michigan water resources commission of the preliminary plans for the project, as soon as may be reasonably possible, and before procuring detailed plans. After approval by the water resources commission of the preliminary plans and after the board has made its preliminary order of determination, the board shall secure detailed plans for the project from a competent engineer and such other qualified personnel as are necessary. The detailed plans shall include detailed plans and specifications of the project and an estimate of costs of the project. The detailed plans shall be submitted to the water resources commission for its approval, and no construction shall be undertaken until the detailed plans are approved. The board shall also submit the detailed plans to the water management commission for approval before any construction of the project is undertaken. The commission shall review the plans and either adopt them or recommend revisions. Revisions recommended by the commission shall be submitted by the board to the water resources commission for approval as hereinbefore provided. When the detailed plans have been approved by both the water management commission and water resources commission, they shall be known as the "official plans" and shall be filed with the secretary of the board. In approving the plans, the commission shall not be limited to matters described in the petition.
MCL 280.560