462A.34A  Vehicles prohibited in streambed.
  1.  Except as provided in subsection 2, a person shall not operate a motor vehicle in any of the following:
  a.  Any portion of a meandered stream.
  b.  Any portion of the bed of a nonmeandered stream which has been identified as a navigable stream or river by rule adopted by the department and which is covered by water.
  c.  Any portion of a stream identified as a trout stream by the department.
  2.  This section does not prohibit the use of ford crossings of public or private roads or any other ford crossing when used for agricultural purposes, the operation of construction vehicles engaged in lawful construction, repair, or maintenance in a streambed, or the operation of motor vehicles on ice.
  3.  The department of natural resources shall adopt rules identifying the navigable streams and rivers in which a motor vehicle may be operated. The department may exempt participants of organized special events from this section where the organized special event is approved by a state or local authority.
  4.  As used in this section, “motor vehicle” means a motor vehicle as defined in section 321.1, subsection 42.
89 Acts, ch 244, §41
CS89, §106.34A
C93, §462A.34A