A. “Developed parcel” means a parcel of real property which has been altered by grading or filling of the ground surface, or by construction of any improvement or other impervious surface area which affects the hydraulic properties of the parcel.

B. “Impervious surface” means those hard surfaced areas which either prevent or retard the entry of water into the soil in the manner that such water entered the soil under natural conditions preexisting any development on the property, and/or those hard surfaced areas which cause water to run off the surface in greater quantities or at an increased rate of flow from that present under natural conditions preexisting any development on the property, including, but not limited to, such surfaces as rooftops, ‘green roofs’, asphalt or concrete sidewalks, paving, driveways, parking lots, walkways, patio areas, storage areas, and gravel, oiled macadam, pervious asphalt or concrete, or other surfaces which similarly affect the natural infiltration or runoff patterns existing prior to development.

C. “Impervious unit” means a configuration or conglomeration of impervious surface estimated to contribute an amount of runoff to the City’s storm water management system which is approximately equal to that created by the average single-family residential parcel. One impervious unit (IU) is equivalent to two thousand square feet of impervious surface area. For purposes of computation of rates and charges, impervious units are truncated to the nearest tenth.

D. “Parcel” means the smallest separately segregated unit or plot of land having an identified owner, boundaries and surface area which constitutes a separate lot or tract capable of being conveyed without further subdivision.

E. “Single-family parcel” means a parcel which has been actually developed with a single-family residence.

F. “Undeveloped parcel” means any parcel of real property which has not been altered by grading or filling of the ground surface, or by construction of any improvement or other impervious surface area which affects the hydraulic properties of the parcel.

G. Repealed by Ord. 2864.

H. “Other developed parcel” means any developed parcel not defined as a single-family parcel in subsection E of this section, including duplexes and rights-of-way. (Ord. 2864 § 2 (part), 2016: Ord. 2464 § 3 (part), 2009: Ord. 1823 § 1, 1995; Ord. 1433 § 1, 1988: Ord. 1409 § 1 (part), 1988).