Ordinance 3168-10 - Laserfiche WebLink

(13) "Natural Location" of drainage system shall refer to the location of those channels, swales, and other conveyance systems as defined by the topographic contours existing for the subject property, from City of Everett aerial topographic maps dated 4-8-69 and 4-25-71. In cases where the above maps are inconclusive, "natural location", shall refer to the existing features unless it can be shown from documented maps or photographs that the features have existed less than ten (10)years. In cases of disagreement, the decision of the City Engineer as to "natural location" shall be final. (14) "Planned Residential Development" shall mean a land development project comprehensively planned as an entire via a single site plan which permits flexibility in building siting, (lot size, setback lines, etc.), mixture of housing types, useable open space and preservation of sufficient natural feature. (15) "Pollutant-generating Impervious Surface (PGIS)" shall mean those impervious surfaces considered to be a significant source of pollutants in stormwater runoff Such surfaces include those which are subject to: vehicular use; industrial activities; or storage of erodible or leachable materials, wastes, or chemicals, and which receive direct rainfall or the run-on or blow-in of rainfall. Erodible or leachable materials, wastes, or chemicals are those substances which, when exposed to rainfall, measurably alter the physical or chemical characteristics of the rainfall runoff. Examples include erodible soils that are stockpiled, uncovered process wastes, manure, fertilizers, oily substances, ashes, kiln dust, and garbage dumpster leakage. Metal roofs are also considered to be PGIS unless they are coated with an inert, non-leachable material (e.g., baked-on enamel coating). A surface, whether paved or not, shall be considered subject to vehicular use if it is regularly used by motor vehicles. The following are considered regularly-used surfaces: roads, unvegetated road shoulders, bike lanes within the traveled lane of a roadway, driveways, parking lots, unfenced fire lanes, vehicular equipment storage yards, and airport runways. The following are not considered regularly-used surfaces: paved bicycle pathways separated from and not subject to drainage from roads for motor vehicles, fenced fire lanes, and infrequently used maintenance access roads. 9