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A. “Developed parcel” means any parcel altered from the natural state by the construction, creation, or addition of impervious surfaces.

B. “Elderly” means the age established by RCW 74.38.070, as it now exists or may hereafter be amended.

C. “Impervious surface” means a nonvegetated surface which either prevents or retards the entry of water into the soil mantle as it entered under natural conditions prior to development, and/or causes water to run off the surface in greater quantities or at an increased area of flow from the flow present under natural conditions prior to development. Common impervious surfaces include, but are not limited to, roofs, walkways, patios, driveways, parking lots, storage areas, areas which are paved, graveled or made of packed or oiled earthen materials, or other surfaces which similarly impede the natural infiltration of surface and storm water. Open, uncovered retention/detention facilities shall not be considered as impervious surfaces for the purposes of determining whether the thresholds for application of minimum requirements are exceeded but shall be considered impervious surfaces for purposes of runoff modeling.

D. “Land use code” or “zoning code” means the restrictions on the type of development for a specific parcel of land as described in BMC Titles 12, 15 and 17.

E. “Low-income” means a person with an annual income level as established by RCW 84.36.381(5)(b), as the same now exists or may hereafter be amended.

F. “Maintenance” means the act or process of cleaning, repairing or preserving a system, unit, facility, structure, or piece of equipment.

G. “Nonresidential parcel,” for storm water utility billing purposes, means any parcel which contains more than three residences or is used primarily for commercial or other nonresidential purposes. These parcels are classified from very light to very heavy based on percentage impervious area, as referenced within BMC 18.10.110.

H. “Parcel” means the smallest separately segregated unit or plot of land having an identified owner, boundaries, and surface area which is documented for property tax purposes and given a tax lot number by either the King County or Snohomish County assessor.

I. “Person” means any individual, firm, company, association, corporation, or governmental agency.

J. “Property owner of record” means a person or persons shown in the records of the county assessor to be the owner of property and to whom property tax statements are directed.

K. “Rate category” means the classification in this chapter given to a parcel in the service area based upon the type of land use on the parcel and the percentage of impervious surface area contained on the parcel.

L. “Rates” means the dollar amount charged per unit of surface area of a parcel of real property or per parcel based upon the land use classification and/or amount of impervious surface coverage for the accommodation of storm and surface water runoff and other surface water management services.

M. “Retention/detention facility” means a type of drainage facility designed either to hold water for a considerable length of time and then release it by evaporation, plant transpiration and/or infiltration into the ground; or to hold runoff for a short period of time and then release it to the surface and storm water management system.

N. “Residence” means a building or structure or portion thereof, designed for and used to provide a place of abode for human beings. The term “residence” includes the term “residential” or “residential unit” as referring to the type of or intended use of a building or structure.

O. “Residential parcel” means any parcel which contains no more than three residences or three residential units which are within a single structure and is used primarily for residential purposes.

P. “Service charges” means charges to property owners for storm and surface water management services.

Q. “State highway right-of-way” means the right-of-way of a state limited access highway. The term does not include city streets forming a part of the route of state highways that are not limited access highways or state property under the jurisdiction of the Department of Transportation that is outside the right-of-way lines of a state highway.

R. “Utility” means the Bothell storm and surface water management utility created under the provisions of this chapter. (Ord. 2365 § 6, 2021; Ord. 2200 § 2 (Exh. B), 2016; Ord. 2023 § 1 (Exh. A), 2009; Ord. 1634 § 1, 1996).