(a) Following is the classification and evaluation system for determining the priority of rivers to be considered for inclusion in the Arkansas Natural and Scenic Rivers System:

1. (1) “Natural river” means those rivers or sections thereof that are generally free from man-made impoundments and may have primitive, undeveloped roads, whose lands are essentially primitive, with a minimal level of human disturbance;

2. (2) “Pastoral river” means those rivers or sections thereof that:

   1. (A) Are readily accessible;
   2. (B) Have some housing or other development near their shorelines;
   3. (C) Have preexisting impoundments that do not substantially alter the character and quality of the stream; and
   4. (D) Partially or predominantly flow through agricultural areas; and

3. (3)

   1. (A) “Scenic river” means those rivers or sections thereof that are largely free of impoundments.
   2. (B) Their shorelines may have a moderate amount of human disturbance that does not substantially interfere with the public use or fish and wildlife, natural vegetation, or water quality of the river.