357.10  Filing of report and plat.
  The engineer’s report, together with the dummy plat showing the tentative design and assessment, shall be filed with the county auditor within thirty days of such engineer’s appointment, unless for adequate reasons it is impossible for the engineer to do so, in which case the board of supervisors may extend the time therefor.
[C39, §5526.10; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §357.10]