"Agricultural Land Uses" shall mean all lands which have impervious surfaces, with a land use code of "CU FARM & AGRI RCW 84.34 CURRENT USE."

"Base Rate Service Area" shall mean all parcels in unincorporated Pierce County, which are not otherwise exempted.

"Contiguous Parcel" shall mean abutting parcels of property having both common ownership and a structure built across parcel lines.

"County" shall mean Pierce County, Washington, or as indicated by the context, may mean the Department of Planning and Public Works, Planning and Public Works Director, County Engineer, or other official, officer, employee or agent representing the County in the discharge of his or her duties. For purposes of this Chapter, County shall be construed to also include those incorporated areas joining the utility by executing with the County an interlocal agreement for drainage.

Detention. See Pierce County Stormwater Management and Site Development Manual Volume 1, Glossary.

"Duplex" shall mean one two-family dwelling, either wholly or partially located on a parcel or contiguous parcels, consisting of a building containing not more than two complete living units, designated and/or used to house not more than two families living independently of each other and including all necessary household functions of each such family.

"Duplex Condo" shall mean one complete condominium living unit with its own tax parcel number connected to another complete condominium living unit.

"Duplex Condo Equivalent" shall mean 1,703 square feet of impervious area.

"Duplex Equivalent" shall mean 3,406 square feet of impervious area.

"Engineer" shall mean a professional civil engineer, currently licensed by the State of Washington, retained by and acting on behalf of the parcel owner.

Hard Surface. See Pierce County Stormwater Management and Site Development Manual Volume 1, Glossary.

"Highway" shall mean all impervious ways, lanes, roads, streets, boulevards, and/or places in the County open as a matter of right to public vehicular travel both inside and outside the limits of incorporated cities and towns.

Impervious Surface. See Pierce County Stormwater Management and Site Development Manual Volume 1, Glossary.

"Interlocal Agreement" shall mean that contract between the County and other incorporated areas of Pierce County, Drainage Districts, or other entities pursuant to Chapter 39.34 RCW, which delineates the terms, conditions and relationships of the parties regarding the plan, design, construction, operation, maintenance and funding of storm drainage systems within the incorporated area.

"Master Plan" shall mean the Storm Drainage and Surface Water Management Plan adopted by County Ordinance No. 91-113 for managing storm drainage and surface water runoff facilities and features within unincorporated Pierce County.

"Mobile Home Equivalent" shall mean 1,457 square feet of impervious area.

"Mobile Home Park Condo" shall mean a parcel with one or more mobile homes situated thereon which has its own tax parcel number and is designated a Mobile Home Park Condo for property tax purposes by the Pierce County Assessor-Treasurer.

"Multifamily" shall mean a dwelling, either wholly or partially located on an individual parcel, consisting of a building containing more than two complete living units, designated and/or used to house more than two families living independently of each other and including all necessary household functions of each such family.

"Owner or Owner of Record" shall mean the holder of title by recorded deed or the purchaser under a recorded real estate contract.

"Parcel" shall mean any portion, piece, or division of land; fractional part or subdivision of block, according to plat or survey; portion of platted territory measured and set apart for individual and private use and occupancy.

"Residential" shall mean a parcel or contiguous parcels with one single family home or single-family residential condominium or modular home designed and/or used to house a single family, either wholly or partially located on it or them.

"Residential Equivalent" shall mean 2,640 square feet of impervious area.

Retention. See Pierce County Stormwater Management and Site Development Manual Volume 1, Glossary.

"River Services Overlay Area" shall mean all parcels within the Puyallup River Water Resource Inventory Area, except those within the "Hylebos" and "Browns Dash Point" sub-watersheds. Also, all parcels in the Upper Nisqually sub-watershed.

"Service Charge" means the charge levied on parcels in unincorporated areas of the County and those incorporated areas defined by an interlocal drainage agreement as authorized by PCC 11.02.050.

"System" shall mean the entire system of storm drainage and surface water runoff facilities owned by the County or over which the County has right of use and responsibility for the movement and control of storm drainage and surface water runoff, including both naturally occurring and man-made facilities.

"Transportation Infrastructure" includes all impervious surfaces associated with publically owned and operated airports.

"Vacant/Undeveloped" shall mean a parcel of land that has no impervious area.

"Water Quality Overlay Area" shall mean all parcels located within the adopted Pierce County Urban Growth Area (UGA). For billing purposes, the UGA effective as of October 1 will be used for determining the following year billings.