Sec. 17. If the drainage board:
(1) finds for the petitioner under section 14(a) of this chapter; and
(2) does not find under section 15 of this chapter that the obstruction of the drain or a natural surface watercourse was created intentionally by any of the respondents;
the drainage board shall enter an order under section 18 or 19 of this chapter concerning the removal of the obstruction.