The excavation, removal, replacement, repair, construction, or other disturbance of any portion of the public improvements within a public street or drainage right-of-way. These public improvements include, but are not limited to, curb, sidewalk, driveway, and driveway aprons, drainage structures and conduits, pavements, base course, gutters, retaining walls, channels, headwalls, railings, guard rails, or any other public improvement existing within the public right-of- way. For the purposes of this chapter, that work which is being performed outside of the public right-of-way, but which requires the storage of materials or the operation of equipment within the public right-of-way, in such a manner as may cause damage, will also be deemed excavation work. Excavation work shall also include the construction, addition, installation, or other provision of the whole or portions of the improvements within a public street, drainage right-of-way or other public way or public grounds by persons other than those exempted from the provisions of this chapter, including privately sponsored construction of curbing, sidewalks, pavement extensions, aprons, drainage or any other portions of the public improvements.