Chapter 25.10
DEFINITIONS

Sections:

25.10.010    Application of definitions.

25.10.020    Aquatic system.

25.10.030    Commercial.

25.10.040    Commercial rainwater harvesting system.

25.10.050    Developed real property.

25.10.060    Director.

25.10.070    Drainage basin.

25.10.080    Farm.

25.10.090    Repealed.

25.10.100    Impervious surfaces.

25.10.110    Improved.

25.10.120    Land use classifications.

25.10.130    Mean annual rainfall depth.

25.10.140    Mean annual runoff volume.

25.10.150    Mixed use property.

25.10.160    Non-point source pollution.

25.10.170    Non-residential and other use.

25.10.180    Ordinary residential improvement.

25.10.190    Property owner.

25.10.200    Rates.

25.10.210    Residential.

25.10.220    Right-of-way.

25.10.230    Service charges.

25.10.240    Storm and surface water management facilities.

25.10.250    Storm and surface water management services.

25.10.260    Storm water.

25.10.270    Surface water.

25.10.275    Surface water management utility district.

25.10.280    Water quality management facilities.

25.10.290    Water quality restoration services.

25.10.300    Watershed.

25.10.305    Repealed.

25.10.310    Watershed action plan or watershed management plan.

25.10.010 Application of definitions.

Unless the context clearly requires otherwise, the definitions in this chapter apply throughout this title.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.020 Aquatic system.

Puget Sound, bays, tidelands and other salt waters, rivers, streams, creeks, lakes, marshes, wetlands and other inland waters.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.030 Commercial.

Any development or use of real property meeting the definition of "commercial development" in SCC 30.91C.132 or the definition of "industrial development" in SCC 30.91I.035.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.040 Commercial rainwater harvesting system.

A system for storing, collecting, and reusing rainwater from a rooftop, installed at a commercial-use building, that has been designed and constructed in accordance with the Washington State Building Code Council’s Permissive Rainwater Harvesting System Guidelines for Non-residential Occupancies (2002 or as amended), has a storage volume of at least 10 percent of the mean annual runoff volume generated from the contributing roof area, and for which design and construction has been approved by the director of the department of planning and development services.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.050 Developed real property.

Real property characterized by the addition of impervious surfaces or removal of native vegetation cover, changing the property from its natural condition. Also known as improved.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.060 Director.

The director of the Snohomish County department of public works or his or her designee.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.070 Drainage basin.

The geographic region within which water drains into a particular aquatic system or other body of water. Also known as a watershed.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.080 Farm.

Property assessed and taxed by the county as farm or agricultural use.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.090 Former watershed management areas.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016; Repealed by Amended Ord. 17-020, July 5, 2017, Eff date July 21, 2017).

25.10.100 Impervious surfaces.

Hard surfaced areas which prevent or retard the entry of water into the soil mantle or cause water to run off the surface in greater quantities or at an increased rate of flow than under natural conditions. Common impervious surfaces include, but are not limited to, rooftops, concrete or asphalt sidewalks and paving, walkways, patio areas, driveways, parking lots or storage areas and gravel, oiled or other surfaces which similarly impede the natural infiltration of surface water or runoff patterns existent prior to development.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.110 Improved.

Real property characterized by the addition of impervious surfaces or removal of native vegetation cover, changing the property from its natural condition.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.120 Land use classifications.

The type of development on a given parcel of land as indicated in the records of the Snohomish County assessor or as determined by inspection by the director. Land use classifications are used to determine rate categories because they are indicators of impervious surfaces and hydrologic intensity.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.130 Mean annual rainfall depth.

The mean annual rainfall depth as determined by information set forth in the Stormwater Management Manual for Western Washington, Volume I, Appendix I-B: 2014 Update, (December 2014 or latest edition, Washington State Department of Ecology Publication #14-10-055).

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.140 Mean annual runoff volume.

The runoff volume calculated as the product of a specified area and the mean annual rainfall depth, or the equivalent runoff volume statistic from that area calculated by a continuous-simulation hydrologic model using long-term local rainfall records.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.150 Mixed use property.

Property on which a combination of residential, farm, commercial or other non-residential uses exist.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.160 Non-point source pollution.

Pollution that enters storm and surface waters from dispersed sources (such as surface runoff) rather than through pipes. Non-point sources include, but are not limited to: forest practices, agricultural practices, onsite sewage disposal systems, developed real property, motor vehicles, and recreational boats.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.170 Non-residential and other use.

Any development or use of real property that does not meet the definitions in SCC 25.10.030, SCC 25.10.080, SCC 25.10.180, SCC 25.10.210 or SCC 25.10.220.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.180 Ordinary residential improvement.

Those structures and facilities that are commonly found with, and are incidental to, the development and use of a single-family residence including, but not limited to, garages, decks, driveways and serving utility systems.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.190 Property owner.

One or more persons or any legal entity that owns, or is designated to pay taxes, fees and service charges on, or is empowered to grant access to or authorize and approve maintenance of drainage facilities located on, any real property or portion thereof.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.200 Rates.

The dollar amount charged per unit of surface area of real property, per parcel of real property or per dwelling unit or ordinary residential improvement based upon the land use classification and amount of impervious surface coverage for the accommodation of water quality restoration and storm and surface water runoff and other surface water management services.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.210 Residential.

Property characterized by dwelling units whose primary function is to be used as single family housing with impervious surface coverage not in excess of 15,000 total square feet per tax parcel. The class includes single family residences, condominiums and mobile homes not in parks, and ordinary residential improvements. Single family residences used for business purposes or for the storage of vehicles, equipment or junk as defined by SCC 30.91J.010 are not considered residential. Apartments, hotels, motels, mobile home parks, dormitories and group housing are not considered residential.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.220 Right-of-way.

Public or private real property held for road or transportation purposes to allow for the passage of people or goods, regardless of whether any road or transportation improvement exists thereon or whether it is used, improved, or maintained for travel.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.230 Service charges.

Charges to property owners for water quality restoration and storm and surface water management services.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.240 Storm and surface water management facilities.

Any facilities, improvements, developments, properties, aquatic systems or interest therein, made, constructed or acquired for the purpose of controlling or protecting life or property from storm, waste, flood, or surplus waters, or for the purpose of protecting water quality. Such facilities shall include, but not be limited to, the improvements and authority described in chapters 86.12, 86.13, and 86.15 RCW.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.250 Storm and surface water management services.

Any activity, routine, or project developed and implemented to comply with federal, state, or local regulations and policies designed to minimize drainage problems. Such services may include, but shall not be limited to those that: plan, design, regulate, establish, acquire, develop, construct, maintain, and improve storm and surface water management facilities; inventory, rehabilitate, and restore drainage systems; investigate and address drainage problems; and collect and analyze stream flow data.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.260 Storm water.

Surplus waters generated from precipitation events like rain or snowmelt that flow over land or impervious surfaces with little or no infiltration into the ground.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.270 Surface water.

Water from all sources that occurs on the earth’s surface either as diffused water or as water in natural channels, artificial channels or other surface water bodies and inland waters including salt waters, lakes, ponds, wetlands, rivers, streams and creeks.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.275 Surface water management utility district.

(1) The surface water management utility district shall consist of all unincorporated Snohomish County except the following areas:

(a) Stillaguamish Reservation;

(b) Tulalip Indian Reservation;

(c) Hat Island; and

(d) Properties held in trust by the United States as tribal trust lands.

(2) The utility district may also include properties within cities and towns by interlocal agreement between the county and such cities or towns.

(3) Nothing in this chapter shall be interpreted as preventing adjustment of the utility district boundary by legislative action at a later date.

(Added by Amended Ord. 17-020, July 5, 2017, Eff date July 21, 2017)

25.10.280 Water quality management facilities.

Any facilities or systems, natural or built, that control, collect, store, treat, dispose of, or recycle wastewater, including but not limited to sanitary sewage, storm water, residential waste, commercial wastes, industrial wastes, and agricultural wastes, that are causing or threatening the degradation of subterranean or surface bodies of water due to concentrations of conventional, nonconventional, or toxic pollutants.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.290 Water quality restoration services.

Any activity, routine, or project developed and implemented to comply with federal, state, or local regulations and policies designed to protect surface water quality and shellfish beds. Such services may include, but are not limited to, those that: plan, design, regulate, establish, acquire, develop, construct, maintain, and improve water quality management facilities; regulate water quality; develop and implement watershed and lake management plans, non-point source pollution prevention plans, and comprehensive flood hazard management plans; develop and provide public involvement and education; collect and analyze water quality data; implement, encourage, and promote agricultural best management practices related to animal grazing and manure management; and repair and promote the proper function of onsite sewage systems.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.300 Watershed.

The geographic region within which water drains into a particular aquatic system. Also known as a drainage basin.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).

25.10.305 Watershed management areas.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016; Repealed by Amended Ord. 17-020, July 5, 2017, Eff date July 21, 2017).

25.10.310 Watershed action plan or watershed management plan.

A plan adopted by the county council, the department of ecology or the department of public works for a specific watershed. A plan may include, but shall not be limited to, voluntary, educational, structural and regulatory approaches to source control program strategies, program goals, and recommended actions. Such plans include, but are not limited to, plans developed under the following authorities:

(1) Watershed plans developed under chapter 90.82 RCW;

(2) Salmon recovery plans developed under chapter 77.85 RCW;

(3) Watershed management elements of comprehensive land use plans developed under the Growth Management Act, chapter 36.70A RCW;

(4) Watershed management elements of shoreline master programs developed under the Shoreline Management Act, chapter 90.58 RCW;

(5) Nonpoint pollution action plans developed under the Puget Sound water quality management planning authorities of chapter 90.71 RCW;

(6) Shellfish Protection plans under authority of chapter 90.72 RCW;

(7) Other comprehensive management plans addressing watershed health at a WRIA level or sub-WRIA basin drainage level;

(8) A comprehensive drainage plan;

(9) A storm water plan;

(10) A lake restoration plan;

(11) A lake management plan;

(12) A flood management plan; and

(13) Any combination of the foregoing plans in an integrated watershed management plan.

(Added by Amended Ord. 15-069, Nov. 16, 2015, Eff date Jan. 1, 2016).