As used in this chapter:
(1) “Best management practices” means practices for the construction and maintenance of unpaved roads that are broadly accepted by road engineers and maintenance professionals as the most effective approaches to managing unpaved roads that minimize sediment impacts to adjacent water bodies and aquatic habitats; and
(2) “Unpaved road project” means a project that has as its purpose the reduction of erosion and sedimentation by: Providing better drainage to an eroding unpaved public road maintained by a county;
(3) Stabilizing erodible ditches and drainage outlets for an unpaved public road maintained by a county;
(4) Creating a more durable driving surface for an unpaved public road maintained by a county; or
(5) A combination of the activities described in subdivisions (2)(A)-(C) of this section.