100.03 DEFINITIONS.
   1.   “Developed property” means real property upon which a structure or impervious surface has been placed or constructed, thus increasing the amount of rainwater or surface water runoff.
   2.   “Director” means the Planning Director or his/her designee.
   3.   “Dwelling unit” shares the same definition as set forth in Chapter 167.01.
   4.   “Equivalent residential unit” (ERU) means the average impervious area of residential developed property per dwelling unit located within the City, as periodically determined and established as provided in this chapter.
   5.   “ERU rate” means the dollar value periodically determined and assigned to each ERU as a fee for storm water management services, and expressed as $x.xx per ERU.
   6.   “Exempt property” means any city-owned property, including but not limited to public streets, alleys and sidewalks, buildings, and parks.
   7.   “Impervious area” means the number of square feet of hard-surfaced areas which either prevent or slow the entry of water into the soil mantle as it enters under natural conditions for undeveloped property, and/or causes water to run off the surface in greater quantities or at an increased rate of flow from that present under natural conditions for undeveloped property, including but not limited to roofs, roof extensions, patios, porches, driveways, pavement, gravel, and athletic courts.
   8.   “Nonresidential property” means any property developed for commercial, industrial, governmental or institutional use, including but not limited to churches, hospitals, parking lots and mixed use properties incorporating residential uses.
   9.   “Storm Water Drainage System” means the system of publicly or privately owned or operated rivers, creeks, ditches, drainage channels, pipes, basins, street gutters, and lakes within the City through which or into which storm water runoff, surface water or subsurface water is conveyed or deposited.
   10.   “Storm water management system utility” means the enterprise fund utility created by this chapter to operate, maintain and improve the system and for such other purposes as stated in this chapter.
   11.   “Storm water management system” means the existing storm water management facilities, storm water drainage system, and flood protection system of the City and all improvements thereto which by this chapter are constituted as the property and responsibility of the storm water management utility, to be operated as an enterprise fund to, among other things, conserve water, control discharges and flows necessitated by rainfall events; and incorporate methods to collect, store, absorb, inhibit, treat, use or reuse water to prevent or reduce flooding, over-drainage, environmental degradation and water pollution or otherwise affect the quality or quantity of discharge from such system, and programs directly supporting those purposes.
   12.   “Undeveloped property” means any real property that has no impervious area.
   13.   “User” means any person owning, operating or otherwise responsible for property within the City, which directly or indirectly discharges storm water or subsurface waters to any portion of the storm water management system, including direct or indirect discharges to the City’s storm water drainage system, or which is directly or indirectly protected by the City’s flood protection system or storm water drainage system.