2015-009 Council Ordinances - Laserfiche WebLink

Home Search

FLOODPLAIN. The areas adjoining a waterbody that are inundated during the 100 -year flood. FLOODWAY. The channel of a watercourse, the bed of water basins and those portions of adjoining floodplains that must be kept free of encroachment to accommodate the 100 -year flood. FLOODWAY FRINGE. The area between the floodway and the boundary of the 100 -year flood. FREEBOARD. Vertical distance between the 100 -year flood elevation or emergency overflow elevation of a water basin or watercourse and the elevation of the regulatory elevation of a structure. IMPERVIOUS SURFACE. A compacted surface or a surface covered with material (i.e., gravel, asphalt, concrete, Class 5, etc.) that increases the depth of runoff compared to natural soils and land cover. Including but not limited to roads, driveways, parking areas, sidewalks and trails, patios, tennis courts, basketball courts, swimming pools, building roofs, covered decks, and other structures. INFILTRATION. Water entering the ground through the soil. LAND -DISTURBING ACTIVITY. Any disturbance to the ground surface that, through the action of wind or water, may result in soil erosion or the movement of sediment into waters, wetlands or storm sewers or onto adjacent property. LAND -DISTURBING ACTIVITY includes but is not limited to the demolition of a structure or surface, soil stripping, clearing, grubbing, grading, excavating, filling and the storage of soil or earth materials. The term does not include normal farming practices as part of an ongoing farming operation. LANDLOCKED BASIN. A water basin lacking an outlet at an elevation at or below the water level produced by the critical duration flood event, generally the 10 -day snowmelt event. LOW ENTRY ELEVATION. The elevation of the lowest opening in a structure. LOW FLOOR ELEVATION. The elevation of the lowest floor of a habitable or uninhabitable structure, which is often the elevation of the basement floor or walk -out level. MILL, RECLAMATION AND OVERLAY. Removal of the top layer(s) of an impervious surface (e.g. roadway, parking lot, sport court) by mechanical means, followed by the placement of a new layer of impervious surface, without exposure of the underlying native soil. NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) STORMWATER DISCHARGE PERMIT. A permit issued by the Minnesota Pollution Control Agency that authorizes the discharge of pollutants to the waters of the State. DRAFT ORD 09-15 CHAPTER 1011STORMWATER & ESC ORDINANCE.DOCX 6/29