When the improvement has been finally located and established, the board may if necessary appoint the said engineer or a new one to make a permanent survey of said improvement as so located, showing the levels and elevations of each forty-acre tract of land and file a report of the same with the county auditor together with a plat and profile thereof.
Iowa Code § 468.30
89 Acts, ch 126, §2
Referred to in §468.62