310.13  Surveys, plans and estimates.
  The county engineer shall make or cause to be made, the surveys, plans and estimates for any project, and submit them to the board of supervisors for approval and the department for authorization for letting. The construction work on a project shall be done in accordance with the plans, except insofar as they are modified to meet unforeseen or better understood conditions.
[C39, §4686.13; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §310.13; 
82 Acts, ch 1110, §7
]