Unless the context clearly indicates otherwise the following words shall have the meanings herein ascribed to them wherever they appear inchapter 68 of the Kansas Statutes Annotated, and acts amendatory thereof or supplemental thereto:

(1) The word “bridge” shall mean a structure having a clear span of more than twenty (20) feet, measured along the center line of the road between the inside faces of end supports, and multiple-span structures where the sum of the individual clear spans plus the aggregate width of the intermediate support or supports is in excess of twenty (20) feet;

(2) the word “culvert” shall mean any waterway structure not defined as a bridge;

(3) the word “subway” shall mean a clear opening for public highway travel under a bridge or trestlework;

(4) the word “structure” shall mean either a bridge, a culvert or a subway.

For the purposes of this chapter, a concrete overflow bridge or ford forty (40) feet or more in length shall be considered a bridge, and may be constructed and maintained in accordance with the laws relating to the construction and maintenance of bridges; and any concrete overflow bridge or for less than forty (40) feet in length shall be considered a culvert and may be constructed and maintained in the manner provided by law for the construction and maintenance of culverts.