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SMP Inspection & Maintenance Policy Page 13 1. Definitions Culverted Stream: A closed conveyance structure designed to carry stormwater and through which stormwater flows. Basin: A stormwater control measure designed to store water for a limited period of a time and provide peak flow attenuation. To be considered a regional basin, a basin must be in line with the Regional Stormwater System and must fulfill the function of causing a significant reduction in peak flow of water through the Regional Stormwater System as determined by the District. Dam: A barrier constructed across an open channel to control or impound the flow of water; may be part of large regional basin facility. District-owned Assets: Those Regional Stormwater System assets that are legally owned and operated by the District. 1&M Activities: Inspection ahd maintenance activit'ies th'at include, but are not limited to, the inspection, assessment, cleaning, structural maintenance, aesthetic maintenance, emergency repairs, and water quality and habitat maintenance of Regional or Local Stormwater System assets to ensure their stormwater conveyance functionality. • . Local Stormwater System: The entire system of watercourses, stormwater conveyance structures, or Stormwater Control Measures owned and/or operated by a private entity or a unit of local government other than the District. The Local Stormwater System shall include those water.courses, stormwater conveyance structures, orStormwater Control Measures not designated as part of the Regional Stormwater System. Local Stormwater System Assets: Those stormwater conveyance structures, channels, and control measures that are owned and/or operated by a private entity or a unit of local government other than the District, including all assets not designated as part of the Regional Stormwater System. Open Channel: A natural or artificial uncovered conveyance structure through which stormwater flows. Regional Stormwater System: The entire system of watercourses, stormwater conveyance structures, and Stormwater Control Measures in the District's stormwater service area that are owned and/or operated by the District or over which the District has right of use for the management of stormwater, including both naturally occurring and constructed facilities. The Regional Stormwater System shall generally include.those watercourses, stormwater conveyance structures, and Stormwater Control Measures receiving drainage from three hundred (300) acres of land or more. The District shall maintain a map of the Regional Stormwater System that shall serve as the official delineation of such system. Regional Stormwater System Assets: Those stormwater conveyance structures, channels, and control measures that drain th.ree hundre.d (300) acres of land or more or are owned by the District.