Habitat Management. Management of land to maintain species in suitable habitats within their natural geographic distribution so that isolated subpopulations are not created. This does not imply maintaining all habitat or individuals of all species in all cases.

Habitats of Local Importance. “Habitats of local importance” include a seasonal range or habitat element with which a given species has a primary association, and which, if altered, may reduce the likelihood that the species will maintain and reproduce over time. These might include areas of high relative density or species richness, breeding habitats, winter range, and movement corridors. These might also include habitats that are of limited availability or high vulnerability to alterations, such as cliffs, talus, and wetlands.

Hard Armoring Solutions. Structural shoreline stabilization and reinforcement measures that are solid with hard surfaces, such as concrete, pilings, rock revetments, gabions, concrete groins, retaining walls, bulkheads and the like – typically non-natural approaches to shoreline stabilization. (SMP)

Hazardous Liquid Pipeline. As defined by RCW 81.88.040, “Hazardous Liquid” means: (a) Petroleum, petroleum products, or anhydrous ammonia as those terms are defined in 49 C.F.R. Part 195 in effect March 1, 1998; and (b) carbon dioxide. Pipeline, pipeline system, or hazardous liquid pipeline mean all parts of a pipeline facility through which a hazardous liquid moves in transportation, including but not limited to line pipe, valves, and other appurtenances connected to line pipe, pumping units, fabricated assemblies associated with pumping units, metering and delivery stations and fabricated assemblies therein, and breakout tanks. Pipeline or pipeline system does not include process or transfer pipelines.

Hazardous Liquid Pipeline Corridor. The pipeline pathway in which the pipelines and facilities of a hazardous liquid pipeline operator are located, including public rights-of-way and easements over and through public or private property.

Hazardous Materials. Any hazardous waste, hazardous substance, dangerous waste, or extremely hazardous waste that is a physical or health hazard as defined and classified in RCW Chapter 70.105 and WAC Chapter 173-303, whether the materials are in usable or waste condition. Hazardous materials shall also include petroleum or petroleum products that are in a liquid phase at ambient temperatures, including any waste oils or sludges.

Hazardous Tree. A tree that is dead, or is so affected by a significant structural defect or disease, that falling or failure appears imminent, or a tree that impedes safe vision or traffic flow, or that otherwise currently poses a threat to life or property.

Hazardous Waste. Any substance defined as a dangerous waste, a hazardous substance, or as a hazardous waste, but excluding hazardous household waste as defined in RCW 70.105.100.

Hazardous Waste Treatment and Storage, Incidental. Storage or treatment of hazardous waste incidental to the primary use occurring on site, such as those substances which may be necessary to manufacture or process certain materials or those substances which are the by-product of a manufacturing or repair process.

Hazardous Waste Treatment or Storage, Primary. Use of a site where hazardous waste is stored or treated as a sole or primary use of the site. Hazardous substances are shipped from other locations to be processed or stored on that site.

Hazardous Waste Treatment, Storage, and Disposal Facilities. Any facility regulated pursuant to WAC 173-303-280 through 173-303-670.

Headwater Stream. A stream that is in the uppermost regions of a watershed or catchment area.

Health and Personal Care. The retail sale of health and personal care items, such as prescription and nonprescription drugs, cosmetic and beauty supplies, prescription and nonprescription eyeglasses, and other similar items.

Heavy Construction Establishment. An establishment that engages in the construction of highways, utility pipelines, power and communication lines, cement or asphalt plants, and refineries.

Heavy Consumer Goods Sales, Rental, or Service. The retail sale, rental, or lease of large consumer goods or a combination of the retail sale, rental, or lease of such goods with repair and maintenance service, and the sale of replacement parts and accessories. Heavy Consumer Goods Sales or Service includes sale of items, such as furniture, hardware, lawn and garden supplies, building materials, electronics and appliances, and heating and plumbing equipment.

Height of Building or Structure. The vertical distance measured from the average finished grade around the building to the highest point of the structure. The approved average finished grade shall be measured by taking the smallest rectangle around the building and averaging the elevations at the midpoint of each side.

Height, Building (SMP). The height measured from average grade level to the highest point of a structure, provided that television antennas, chimneys, and similar appurtenances shall not be used in calculating height, except where such appurtenances obstruct the view of the shoreline of a substantial number of residences on areas adjoining such shorelines, or the applicable master program specifically requires that such appurtenances be included, provided further that temporary construction equipment is excluded in this calculation. (SMP)

Heliport. An airport or landing place for helicopters.

High Consequence Land Use. A land use that if located in the vicinity of a hazardous liquid pipeline represents an unusually high risk in the event of a pipeline failure due to characteristics of the inhabitants or functions of the use. High consequence land uses include:

Historic Landmark. A site or structure which has been designated under RZC 21.30, Historic and Archeological Resources, as a historic landmark and is listed on the Redmond Heritage Resource Register.

Historic Period. The period when Euro-Americans first visited or settled the area -- generally during the mid-18th century.

Hospitals. Any institution, place, building or agency or distinct part thereof which qualifies or is required to qualify for a license under RCW Chapter 70.41, or as a psychiatric hospital licensed under RCW Chapter 71.12 as presently worded or hereafter amended.

Household. An individual or two or more persons related by blood or marriage or a group of not more than eight persons who need not be related by blood or marriage living together in a dwelling unit.

Household Income. All income from all household members over the age of 18 residing in the household. Household income consists of all income that would be included as income for federal income tax purposes (e.g., wages, interest income, etc.) for household members over the age of 18. Income of dependents who reside within a household for less than three months of the year will not be counted toward household income.

Housing Services for the Elderly. The provision of services such as housing and custodial care for those who need or desire caring for themselves, including the elderly. This definition includes retirement housing services, assisted living services, and skilled nursing services and convalescent care. This definition does not include Adult Family Homes.