NR 243.03(58) (58) “Solid manure” means manure with a solids content of 12% or more.

NR 243.03(59) (59) “Small CAFO” means an animal feeding operation with less than 300 animal units that is designated by the department as a CAFO under s. NR 243.26 (2).

NR 243.03(60) (60) “Snow covered ground” means areas of a field covered with any amount of snow.

NR 243.03(61) (61) “Source water protection area” means an area delineated by the department for a public water system or including numerous public water systems, whether the source is ground water or surface water or both, as part of the state source water assessment program approved by the U.S. environmental protection agency under 42 USC 300j-13.

NR 243.03(62) (62) “Spray irrigation” means the application of liquid manure or process wastewater to cropland using equipment that discharges manure into the air via a single nozzle or multiple nozzles or hoses and disperses the manure over distances greater than could be achieved using typical moving vehicle or manure hauling equipment.

NR 243.03(63) (63) “Storage facility” means an excavated or diked pond, walled structure or platform designed for containment of manure.

NR 243.03(64) (64) “Sufficient vegetative cover” means that crop residue or vegetation is present over an entire area in an amount and density of stand that slows the movement of and limits contaminated runoff and soil erosion.

NR 243.03(65) (65) “Surface applied manure” means manure applied to the ground surface by moving vehicles that is not incorporated or injected.

NR 243.03(66) (66) “Surface water quality management areas” or “SWQMA” means all of the following:

NR 243.03(66)(a) (a) The area within 1,000 feet from the ordinary high water mark of navigable waters that consist of a lake, pond or flowage.

NR 243.03(66)(b) (b) The area within 1,000 feet from the high water mark of navigable waters that consist of a glacial pothole lake.

NR 243.03(66)(c) (c) The area within 300 feet from the ordinary high water mark of navigable waters that consist of a river or stream or other non-lake navigable waters.

NR 243.03(66)(d) (d) The area within 300 feet of conduits to navigable waters.

NR 243.03(67) (67) “Swallet” means a sinkhole or rock hole that intercepts a stream, diverting all or a portion of it to groundwater.

NR 243.03(68) (68) “303 (d) listed waters” means the list of impaired waters in the state developed by the department pursuant to 33 USC 1313 and 40 CFR 130.7.

NR 243.03(69) (69) “Tolerable soil loss” or “T” means the maximum rate of soil erosion, in tons per acre per year, allowable for particular soils and site conditions that will maintain soil productivity.

NR 243.03 Note Note: Soil loss will be calculated according to the revised universal soil loss equation II as referenced in ch. ATCP 50 or, potentially, SNAP-Plus software currently being developed by UW-Extension.

NR 243.03(70) (70) “25-year, 24-hour rainfall event” means a rainfall event measured in terms of the depth of rainfall occurring within a 24-hour period and having an expected recurrence interval of once in 25 years as identified in Table 1.

NR 243.03(71) (71) “Unacceptable practice” means a practice that causes or has caused the discharge of pollutants to waters of the state or that results in an operation’s failure to comply with livestock performance standards and prohibitions outlined in ch. NR 151.

NR 243.03(72) (72) “Wastewater treatment strip” means a constructed strip or area of vegetation for reducing sediment, organic matter and other pollutants.

NR 243.03(73) (73) “Waters of the state” has the meaning specified under s. 283.01 (20), Stats.

NR 243.03(74) (74) “Water quality management area” or “WQMA” has the meaning in s. NR 151.015 (24).

NR 243.03(75) (75) “Wetland” means areas delineated on a hydric soils map that are dominated by hydrophytic vegetation. Wetlands do not include prior converted or farmed wetlands.

NR 243.03(76) (76) “Wetland functional values” means the values or uses of wetlands established in s. NR 103.03 (1).

NR 243.03(77) (77) “Wet soil” means soil that is not saturated but has a moisture content that limits its ability to absorb significant amounts of additional liquid.

NR 243.03(78) (78) “Winter acute loss index value” means the value calculated using the phosphorus index that identifies the relative level of risk for acute losses of manure and process wastewater pollutants associated with surface applications during frozen or snow-covered conditions.

NR 243.03(79) (79) “WPDES” means the Wisconsin pollutant discharge elimination system established under ch. 283, Stats.

NR 243.03 History History: CR 05-075: cr. Register April 2007 No. 616, eff. 7-1-07.

NR 243.04 NR 243.04 Rainfall events. The design rainfall amount and probable intensity of 25-year, 24-hour and 100-year, 24-hour rainfall events for locations in Wisconsin shall be determined from the data in Table 1, or for a particular location, the determination may be made on the basis of more recent rainfall probability data verified by a government agency and approved by the department for this purpose.