ADMINISTRATOR: An official appointed by the board of commissioners to administer the provisions of this chapter.
BEST MANAGEMENT PRACTICES (BMPs): Physical, structural, and/or managerial practices that, when used singularly or in combination, prevent or reduce sedimentation pollution of water and erosion of soils.
COMMUNITY STORMWATER SYSTEM: A BMP or series of BMPs which serve(s) more than one parcel.
CONVEYANCE: A mechanism for transporting water from one point to another, including pipes, culverts, ditches, channels and grassy swales.
CUT: To excavate into a hillside to create a flat area or to steepen or flatten a bank.
DESIGN PROFESSIONAL, EROSION, AND SEDIMENTATION CONTROL: A professional engineer, landscape architect, architect, or geologist, registered for their respective profession by the state of Idaho or a certified professional in erosion and sediment control (CPESC) as determined by the Soil And Water Conservation Society and the International Erosion Control Association.
DESIGN PROFESSIONAL, GRADING, DRAINAGE, OR STORMWATER MANAGEMENT: A professional engineer, landscape architect, or geologist, registered for their respective profession by the state of Idaho.
DETENTION: The temporary storage of storm runoff, used to control the peak discharge rates and provide gravity settling of pollutants.
DRIVEWAY: For purposes of managing and treating stormwater, a driveway shall be a means of vehicular access from a public or private road to a point within an individual lot, which is less than two hundred feet (200') in length.
EASEMENT DRAINAGE: A legal encumbrance placed against a property's title for maintenance access or to reserve other specified privileges for the users and beneficiaries of the drainage facilities contained within the boundaries of the easement.
EROSION: The detachment and movement of soil or rock fragments by water, wind, ice, or gravity.
EROSION AND SEDIMENTATION CONTROL: Those best management practices (BMPs), which are employed to prevent or reduce erosion or sedimentation and are typically necessary when ground disturbance occurs. See definition of Best Management Practices (BMPs).
EXCAVATE: Any act by which earth, sand, gravel, rock or other earthen material is cut into, dug, uncovered, displaced, or relocated.
FILL: A solid material which increases the ground's surface elevation or the act of depositing such material by mechanical means.
FLOOD CONTROL STRUCTURE: A manmade feature designed or constructed to reduce damage caused by flood events, including, but not limited to, a dam, dike, channel, levee, or similar device.
GRADING: Any excavation, filling, or movement of earth for the purposes of changing the shape or topography of the land.
GROUNDWATER: Water in a structured zone or stratum beneath the land surface or a surface water body.
GUARANTEE OF FINANCIAL SURETY: A surety bond, cash deposit, or escrow account, irrevocable letter of credit, or other means acceptable to Shoshone County to guarantee that infrastructure or improvements are completed in compliance with the project's approval plans.
HIGH RISK SOIL TYPES: Soil classifications according to the 2002 USDA/NRCS soil survey of the St. Joe area, parts of Benewah and Shoshone Counties, Idaho, which are deemed severe hazard for water erosion; and moderate risk soils that become high risk once disturbed.
HIGH WATER MARK: The point on the bank or shore up to which the presence and action of the water is so continuous as to leave a distinct mark either by erosion, destruction of terrestrial vegetation or other easily recognized characteristic.
IMPERVIOUS SURFACE: Any hard surface area which either prevents or retards the entry of water into the soil mantle as under natural conditions prior to development, and/or hard surface area which causes water to run off the surface in greater quantities or at an increased rate 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 or storage areas, concrete or asphalt paving, gravel compacted native surface roads, compacted earthen materials, and oiled, macadam or other surfaces which similarly impede the natural infiltration of stormwater.
LARGE ORGANIC DEBRIS: As defined by Idaho forest practices act.
LOW RISK SOIL TYPES: Soil classifications according to the 2002 USDA/NRCS soil survey of the St. Joe area, parts of Benewah and Shoshone Counties, Idaho, which are deemed slight hazard for water erosion.
MODERATE RISK SOIL TYPES: Soil classifications according to the 2002 USDA/NRCS soil survey of the St. Joe area, parts of Benewah and Shoshone Counties, Idaho, which are deemed moderate hazard for water erosion.
NATURALLY OCCURRING DRAINING SWALE: Natural drainage conveyances that provide for the discharge of stormwater to class 1 or class 2 streams, but have bed and banks which are vegetatively covered and stable.
PERVIOUS SURFACE: Any surface area which allows the entry of water into the soil mantle.
PRIVATE ROAD: A means of vehicular access, which does not meet the definition of "driveway" and is not maintained by a public highway agency.
PUBLIC HIGHWAY AGENCY: The Idaho transportation department, Shoshone County public works department, or other political subdivision of the state with jurisdiction over public highways, public streets, and public rights of way.
PUBLIC ROAD: Public highway or street, which has been accepted for maintenance by a public highway agency.
RETENTION: The holding of runoff in a basin without release except by means of evaporation, infiltration, or emergency bypass.
REVIEWING AUTHORITY: Shoshone County building official, planning administrator, public works director and floodplain administrator.
SCARIFY: To break up or loosen the ground surface of an area.
SEDIMENT: Fragmented material that originates from weathering and erosion of rocks or unconsolidated deposits and is transported by, suspended in, or deposited by water.
SEDIMENTATION: The deposition of sediment on ground surfaces and in watercourses.
SITE: The parcel of land in which grading or excavation activity is conducted. A road of right shall be considered a separate site from adjacent properties.
SPOIL PILE: Soil and/or rock excavated from an area which will not be used for backfill or final grading on site.
STABILIZED CONSTRUCTION ENTRANCE: A stabilized pad of clean, crushed rock located where traffic enters or leaves a construction site onto a public or private road. The pad shall be a minimum of six inches (6") thick, with a minimum rock size of two (2) to three inches (3"), and a length sufficient to minimize off site tracking.
STORMWATER: The portion of precipitation that does not naturally percolate into the ground or evaporate, but flows via overland flow, interflow, channels, swales or pipes into a defined surface water channel, or a constructed infiltration facility.
STORMWATER CONTROL: Those best management practices (BMPs), which are employed to convey, direct, or dissipate stormwater and are typically necessary when impervious area is created or the natural drainage is interrupted. See definition of Best Management Practices (BMPs).
STREAM: A water source of perceptible extent, which confines and conducts continuously or intermittently flowing water. This definition is intended to include streams in natural or manmade channels.
STREAM, CLASS 1: "Class 1 stream" is as defined by Idaho law.
STREAM, CLASS 2: "Class 2 stream" is as defined by Idaho law.
TREATMENT: Removal of sediment or other pollutants of stormwater.
UNDISTURBED NATURAL VEGETATION BUFFER: An area where no development activity has occurred or will occur, including, but not limited to, logging, construction of utility trenches, roads, structures, or surface and stormwater facilities. Buffer areas shall be left in their natural state. (Ord. 129, 7-11-2006)