For the purposes of this chapter, the following terms shall have these specific meanings:
ADMINISTRATOR: City Planner or other individual appointed by the Mayor and City Council to administer this chapter.
AS-BUILT DRAWINGS: Design plans that reflect the actual installation and placement of all features of the plan and all changes to the plans that occurred during construction.
BEST MANAGEMENT PRACTICES (BMPs): Generally recognized stormwater techniques and methods that have been determined by scientific study and use to prevent or minimize water pollution caused by development or construction.
CITY ENGINEER: An engineer appointed by the Mayor and City Council to represent the City of Kootenai.
CLEARING: The destruction and/or removal of vegetation by manual, mechanical or chemical means, except that for the purposes of this chapter, the term shall not include agricultural and silvicultural practices, gardening, landscaping, snow removal, and other incidental practices not associated with vegetative removal as a precursor to actual construction to which this chapter is applicable.
CONVEYANCE: A mechanism for transporting stormwater from one point to another including pipes, ditches and channels, but not including agricultural ditches for irrigation.
DESIGN PROFESSIONAL: Professionals licensed or authorized by the State of Idaho for engineering, landscape architecture, or stormwater management.
DESIGN STORM: A rainfall event of specific return frequency and duration that is used to calculate stormwater runoff volume and peak discharge rates. For the purposes of this chapter, a 25-year storm event on the Intensity-Duration- Frequency Curve prepared by the Idaho Transportation Department for Zone C shall be used. Subdivisions may require higher return frequency than a 25-year event, as determined by the City Engineer.
DETENTION: The temporary storage of stormwaters to provide for settling of suspended solids, infiltration, velocity reduction, or combination of these.
EROSION CONTROL: Any temporary or permanent measure taken to reduce erosion, control siltation and sedimentation or to ensure that sediment-bearing waters do not leave a construction site.
GROUND WATER: Waters in a subterranean saturated zone or stratum.
IMPERVIOUS SURFACE: A hard surface area that either prevents or retards the entry of water into the soil mantle as under natural conditions prior to construction, or a hard surface area that causes water to run off the surface in greater quantities or at an increased rate of flow compared to conditions prior to construction. Common impervious surfaces, include, but are not limited to roof tops, walkways, patios, driveways, parking lots, concrete or asphalt paving, gravel roads, packed earthen materials, and oiled, macadam or other surfaces that impede the natural infiltration of stormwater. Open, uncovered retention or detention facilities are not considered to be impervious surfaces for the purposes of this chapter.
INFILTRATION: The downward movement of water from the surface to the subsoil.
LAND DISTURBING ACTIVITY: Any activity that results in a change in the existing soil cover, and includes clearing, grading, filling, and excavation, except as otherwise provided in this chapter.
NATIONAL HYDROGRAPHY DATASET (NHD): A digital mapping system maintained by the U.S. Geological Service to portray surface water features, such as rivers, streams, canals, lakes, and ponds.
RETENTION: The holding of stormwater runoff within a contained area in such manner that the stormwater can disperse by means of evaporation, infiltration, or controlled emergency overflow or bypass structures.
ROAD CONSTRUCTION: The building up of the natural land surface to create a travel way open for vehicular passage. Road construction shall include such activities as initial clearing, alteration of topography, installation of culverts, filling of low areas, placement of geofabrics, deposition of subbase or base material, topping, grading, and surfacing, and drainage of ground water.
ROAD RECONSTRUCTION: Any modification of the cross-section, subgrade or alignment of a road or travel way within a right- of-way or easement. Routine grading, snow removal, chip seal, applied dust coating, re-surfacing or repaving of a road shall not be considered reconstruction.
SEDIMENT: Fragmented material that originates from weathering and erosion of rocks or unconsolidated deposits, and is transported by, suspended in, or deposited by water.
SITE: The land area subject to a land disturbing activity associated with any construction to which this chapter is applicable. The site shall be deemed to include actual areas of land disturbance and areas designated for stockpiling or storage of excavated earthen materials.
STORMWATER: That portion of precipitation that does not naturally percolate into the ground or evaporate, but instead runs over the surface of the land, and eventually evaporates or travels to defined watercourses or constructed conveyance, detention or retention facilities.
STORMWATER MANAGEMENT PLAN: A document composed of drawings, maps, calculations, etc., which is used to design a stormwater management system and to ensure the functioning of the system.
STORMWATER MANAGEMENT SYSTEM: A system of collection, detention, retention or infiltration areas and/or treatment devices designed to prevent untreated stormwater from entering a natural body of surface water.
STORMWATER POLLUTION PREVENTION PLAN (SWPPP): A document consisting of drawings of a site with diagrams, explanatory text, maps, etc., which are developed for erosion control pursuant to the Environmental Protection Agency regulations.
STREAM: A natural watercourse of perceptible extent, with definite bed and banks, which confines and conducts continuously flowing water.
SURFACE WATER: All waters that collect, flow or accumulate on or above the ground surface.
SWALE: A shallow depression in the ground surface with relatively gentle side slopes, which is designed or used to retain stormwater for sufficient time to allow stormwater to percolate into the soil or to flow slowly through vegetation that provides natural filtration of sediment.
TREATMENT DEVICE: A constructed or manufactured area or mechanism designed to remove contaminants from stormwater. Treatment devices may include but are not limited to: detention ponds, oil/water separators, biofiltration swales, and constructed wetlands.
UNDEVELOPED OR UNDISTURBED STATE: The soils and vegetation in place prior to the start of any land disturbing activity.
WATERCOURSE: A natural channel carrying waters on a regular or intermittent or infrequent basis. Any body of water, including, but not limited to lakes, ponds, rivers, streams, and bodies of water.
WATERS: All the accumulations of water, surface and ground water, natural and artificial, public and private, or parts thereof, which are wholly or partially within, or flow through a border of Kootenai City limits. (Ord. 214, 5-2-2017)