2009 Iowa Code
Title 8 - Transportation
Subtitle 1 - Highways and Waterways
CHAPTER 314 - ADMINISTRATIVE PROVISIONS FOR HIGHWAYS
314.7 - TREES -- INGRESS OR EGRESS -- DRAINAGE.

        314.7  TREES -- INGRESS OR EGRESS -- DRAINAGE.
         Officers, employees, and contractors in charge of improvement or
      maintenance work on any highway shall not cut down or injure any tree
      growing by the wayside which does not materially obstruct the
      highway, or tile drains, or interfere with the improvement or
      maintenance of the road, and which stands in front of any city lot,
      farmyard orchard or feed lot, or any ground reserved for any public
      use.  Nor shall they destroy or injure reasonable ingress or egress
      to any property, or turn the natural drainage of the surface water to
      the injury of adjoining owners.  It shall be their duty to use strict
      diligence in draining the surface water from the public road in its
      natural channel.  To this end they may enter upon the adjoining lands
      for the purpose of removing from such natural channel obstructions
      that impede the flow of such water.  

         [C24, 27, § 4791; C31, 35, § 4644-c46; C39, § 4644.44; C46, §
      309.44; C50, § 308A.16; C54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §
      314.7]