NR 151.002(13)(13)“Erosion” means the process by which the land’s surface is worn away by the action of wind, water, ice or gravity.
NR 151.002(14)(14)“Exceptional resource waters” means waters listed in s. NR 102.11.
NR 151.002(14g)(14g)“Existing development” means development in existence on October 1, 2004, or development for which a notice of intent to apply for a storm water permit in accordance with subch. III of ch. NR 216 was received by the department or the department of commerce on or before October 1, 2004.
NR 151.002(14r)(14r)“Filtering layer” means soil that has at least a 3-foot deep layer with at least 20 percent fines; or at least a 5-foot deep layer with at least 10 percent fines; or an engineered soil with an equivalent level of protection as determined by the regulatory authority for the site.
NR 151.002(15)(15)“Final stabilization” means that all land disturbing construction activities at the construction site have been completed and that a uniform perennial vegetative cover has been established with a density of at least 70% of the cover for the unpaved areas and areas not covered by permanent structures or that employ equivalent permanent stabilization measures.
NR 151.002(16)(16)“Illicit discharge” means any discharge to a municipal separate storm sewer that is not composed entirely of runoff, except discharges authorized by a WPDES permit or any other discharge not requiring a WPDES permit such as water line flushing, landscape irrigation, individual residential car washing, fire fighting and similar discharges.
NR 151.002(16m)(16m)“Impaired water” means a waterbody impaired in whole or in part and listed by the department pursuant to 33 USC 1313 (d) (1) (A) and 40 CFR 130.7, for not meeting a water quality standard, including a water quality standard for a specific substance or the waterbody’s designated use.
NR 151.002 NoteNote: The impaired waters list is available from the department at dnr.wi.gov.
NR 151.002(17)(17)“Impervious surface” means an area that releases as runoff all or a large portion of the precipitation that falls on it, except for frozen soil. Rooftops, sidewalks, driveways, gravel or paved parking lots, and streets are examples of surfaces that typically are impervious.
NR 151.002(18)(18)“In-fill” means an undeveloped area of land located within an existing urban sewer service area, surrounded by development or development and natural or man-made features where development cannot occur. “In-fill” does not include any undeveloped area that was part of a larger new development for which a notice of intent to apply for a storm water permit in accordance with subch. III of ch. NR 216 was required to be submitted after October 1, 2004, to the department or the department of commerce.
NR 151.002(19)(19)“Infiltration” means the entry and movement of precipitation or runoff into or through soil.
NR 151.002(20)(20)“Infiltration system” means a device or practice such as a basin, trench, rain garden or swale designed specifically to encourage infiltration, but does not include natural infiltration in pervious surfaces such as lawns, redirecting of rooftop downspouts onto lawns or minimal infiltration from practices, such as swales or road side channels designed for conveyance and pollutant removal only.
NR 151.002(22)(22)“Land disturbing construction activity” means any man-made alteration of the land surface resulting in a change in the topography or existing vegetative or non-vegetative soil cover, that may result in runoff and lead to an increase in soil erosion and movement of sediment into waters of the state. Land disturbing construction activity includes clearing and grubbing, demolition, excavating, pit trench dewatering, filling and grading activities.
NR 151.002(23)(23)“Landowner” means any person holding fee title, an easement or other interest in property, which allows the person to undertake cropping, livestock management, land disturbing construction activity or maintenance of storm water BMPs on the property.
NR 151.002(24)(24)“Local governmental unit” has the meaning given in s. 92.15 (1) (b), Stats.
NR 151.002(25)(25)“MEP” or “maximum extent practicable” means the highest level of performance that is achievable but is not equivalent to a performance standard identified in subch. III or IV, as determined in accordance with s. NR 151.006.
NR 151.002(26)(26)“Municipality” has the meaning given in s. 281.01 (6), Stats.
NR 151.002(27)(27)“Navigable waters” and “navigable waterway” has the meaning given in s. 30.01 (4m), Stats.
NR 151.002(28)(28)“New development” means development resulting from the conversion of previously undeveloped land or agricultural land uses.
NR 151.002(29)(29)“NRCS” means the natural resources conservation service of the U.S. department of agriculture.
NR 151.002(30)(30)“Ordinary high water mark” has the meaning given in s. NR 115.03 (6).
NR 151.002(31)(31)“Outstanding resource waters” means waters listed in s. NR 102.10.
NR 151.002(32)(32)“Percent fines” means the percentage of a given sample of soil, which passes through a # 200 sieve.
NR 151.002 NoteNote: Percent fines can be determined using the “American Society for Testing and Materials”, volume 04.02, “Test Method C117-95 Standard Test Method for Materials Finer than 75-mm (No. 200) Sieve in Material Aggregates by Washing”. Copies can be obtained by contacting the American society for testing and materials, 100 Barr Harbor Drive, Conshohocken, PA 19428-2959, or phone 610-832-9585, or on line at: http://www.astm.org/.
NR 151.002(33)(33)“Performance standard” means a narrative or measurable number specifying the minimum acceptable outcome for a facility or practice.
NR 151.002(34)(34)“Pervious surface” means an area that releases as runoff a small portion of the precipitation that falls on it. Lawns, gardens, parks, forests or similar vegetated areas are examples of surfaces that typically are pervious.
NR 151.002(35)(35)“Pollutant” has the meaning given in s. 283.01 (13), Stats.
NR 151.002(36)(36)“Pollution” has the meaning given in s. 281.01 (10), Stats.
NR 151.002(37)(37)“Population” has the meaning given in s. 281.66 (1) (c), Stats.