Sec. 6. At or before the time fixed for the hearing designated in the notice published under section 5 of this chapter, any person interested in or who will be affected by the proposed project may file with the department a written remonstrance against the proposed project, in whole or in part. At the hearing, which may be adjourned from time to time, the board:
(1) shall hear all persons who are interested in the proceedings;
(2) shall finally determine whether or not the proposed project, in whole or in any part, is necessary for the general welfare of the persons residing within the district and will be of public utility and benefit to the property in the district; and
(3) may confirm, modify, or rescind the resolution.
The decision shall be entered in the records of the department.