Chapter NR 151

NR 151.002(42) (42) “Separate storm sewer” means a conveyance or system of conveyances including roads with drainage systems, streets, catch basins, curbs, gutters, ditches, constructed channels or storm drains, which meets all of the following criteria:

NR 151.002(42)(a) (a) Is designed or used for collecting water or conveying runoff.

NR 151.002(42)(b) (b) Is not part of a combined sewer system.

NR 151.002(42)(c) (c) Is not part of a publicly owned wastewater treatment works that provides secondary or more stringent treatment.

NR 151.002(42)(d) (d) Discharges directly or indirectly to waters of the state.

NR 151.002(42m) (42m) “Silviculture activity” means activities including tree nursery operations, tree harvesting operations, reforestation, tree thinning, prescribed burning, and pest and fire control. Clearing and grubbing of an area of a construction site is not a silviculture activity.

NR 151.002(43) (43) “Storm water management plan” means a comprehensive plan designed to reduce the discharge of pollutants from storm water, after the site has undergone final stabilization, following completion of the construction activity.

NR 151.002(44) (44) “Targeted performance standard” means a performance standard that will apply in a specific area, where additional practices beyond those contained in this chapter, are necessary to meet water quality standards.

NR 151.002(45) (45) “Technical standard” means a document that specifies design, predicted performance and operation and maintenance specifications for a material, device or method.

NR 151.002(46) (46) “Top of the channel” means an edge, or point on the landscape landward from the ordinary high water mark of a surface water of the state, where the slope of the land begins to be less than 12% continually for at least 50 feet. If the slope of the land is 12% or less continually for the initial 50 feet landward from the ordinary high water mark, the top of the channel is the ordinary high water mark.

NR 151.002(46m) (46m) “Total maximum daily load” or “TMDL” means the amount of pollutants specified as a function of one or more water quality parameters, that can be discharged per day into a water quality limited segment and still ensure attainment of the applicable water quality standard.

NR 151.002(47) (47) “TR-55” means the United States department of agriculture, natural resources conservation service (previously soil conservation service), Urban Hydrology for Small Watersheds, Second Edition, Technical Release 55, June 1986, which is incorporated by reference for this chapter.

NR 151.002 Note Note: Copies of this document may be inspected at the offices of the department’s bureau of watershed management, the natural resources conservation service, the secretary of state, and the legislative reference bureau, all in Madison, WI.

NR 151.002(48) (48) “Transportation facility” means a highway, a railroad, a public mass transit facility, a public-use airport, a public trail or any other public work for transportation purposes such as harbor improvements under s. 85.095 (1) (b), Stats. “Transportation facility” does not include building sites for the construction of public buildings and buildings that are places of employment that are regulated by the department pursuant to s. 281.33, Stats.

NR 151.002(49) (49) “Type II distribution” means a rainfall type curve as established in the “United States Department of Agriculture, Soil Conservation Service, Technical Paper 149, published 1973”, which is incorporated by reference for this chapter. The Type II curve is applicable to all of Wisconsin and represents the most intense storm pattern.

NR 151.002 Note Note: Copies of this document may be inspected at the offices of the department’s bureau of watershed management, the natural resources conservation service, the secretary of state, and the legislative reference bureau, all in Madison, WI.

NR 151.002(49m) (49m) “US EPA” means the United States environmental protection agency.

NR 151.002(50) (50) “Waters of the state” has the meaning given in s. 283.01 (20), Stats.

NR 151.002(51) (51) “WPDES permit” means a Wisconsin pollutant discharge elimination system permit issued under ch. 283, Stats.

NR 151.002 History History: CR 00-027: cr. Register September 2002 No. 561, eff. 10-1-02; CR 09-112: am. (3), (6), (17), (18), (25), (42) (c), cr. (11m), (14g), (14r), (16m), (42m), (46m), (49m), r. (21) Register December 2010 No. 660, eff. 1-1-11; corrections in (48) made under s. 13.92 (4) (b) 6. and 7., Stats., Register December 2010 No. 660.

NR 151.003 NR 151.003 BMP Location.

NR 151.003(1) (1) Non-navigable waters. For purposes of determining compliance with the performance standards of subchs. III and IV, the department may give credit for BMPs that function to provide treatment for runoff from existing development and post-construction runoff from new development, redevelopment, and in-fill development and that are located within non-navigable waters.

NR 151.003(2) (2) Navigable waters.

NR 151.003(2)(a) (a) New development runoff. Except as allowed under par. (b), BMPs designed to treat post-construction runoff from new development may not be located in navigable waters and, for purposes of determining compliance with the performance standards of subchs. III and IV, the department may not give credit for such BMPs.

NR 151.003(2)(b) (b) New development runoff exemption. BMPs to treat post-construction runoff from new development may be located within navigable waters and may be creditable by the department under subchs. III and IV, if all the following are met:

NR 151.003(2)(b)1. 1. The BMP was constructed prior to October 1, 2002, and received all applicable permits.

NR 151.003(2)(b)2. 2. The BMP functions or will function to provide runoff treatment for the new development.

NR 151.003(2)(c) (c) Existing development and post-construction runoff from redevelopment and in-fill development. Except as provided in par. (d), BMPs that function to provide runoff treatment for existing development and post-construction runoff from redevelopment and in-fill development may not be located in navigable waters and, for purposes of determining compliance with the performance standards of subchs. III and IV, the department may not give credit for such BMPs.

NR 151.003(2)(d) (d) Existing development and post-construction runoff from redevelopment and in-fill development exemption. BMPs that function to provide treatment of runoff from existing development and post-construction runoff from redevelopment and in-fill development may be located within navigable waters and may be creditable by the department under subchs. III and IV, if any of the following are met:

NR 151.003(2)(d)1. 1. The BMP was constructed, contracts were signed or bids advertised and all applicable permits were received prior to January 1, 2011.

NR 151.003(2)(d)2. 2. The BMP is on an intermittent waterway and all applicable permits are received.

NR 151.003 Note Note: An intermittent waterway may be identified on a United States geological survey 7.5-minute series topographic map, a county soil survey map, the Surface Water Data Viewer Map, 24K hydro layer on the department’s website, or determined by the department through a site evaluation, whichever is more current. The Surface Water Data Viewer Map, 24K hydro layer is available at http://dnr.wi.gov/topic/surfacewater/swdv/.

NR 151.003(3) (3) Credit. The amount of credit that the department may give a BMP for purposes of determining compliance with the performance standards of subchs. III and IV is limited to the treatment capability of the BMP.

NR 151.003 Note Note: This section does not supersede any other applicable federal, state, or local regulation such as ch. NR 103 or ch. 30, Stats. Federal, state, and local permits or approvals may be required to excavate, dredge, fill, or construct BMPs in or near wetlands, non-navigable or navigable waters. Other permits and approvals may not be authorized where the BMP construction will result in adverse environmental impacts to the waterway or wetland.

NR 151.003 History History: CR 00-027: cr. Register September 2002 No. 561, eff. 10-1-02; CR 09-112: r. and recr. Register December 2010 No. 660, eff. 1-1-11.

NR 151.004 NR 151.004 State targeted performance standards. Implementation of the statewide performance standards and prohibitions in this chapter may not be sufficient to achieve water quality standards under chs. NR 102 to 105 or groundwater standards under ch. NR 140. In those cases, using modeling or monitoring, the department shall determine if a specific waterbody or area will not attain water quality standards or groundwater standards after substantial implementation of the performance standards and prohibitions in this chapter. If the department finds that water quality standards or groundwater standards will not be attained using statewide performance standards and prohibitions but the implementation of targeted performance standards would attain water quality standards or groundwater standards, the department shall promulgate the targeted performance standards by rule.

NR 151.004 Note Note: Pursuant to s. 281.16 (2) (a) and (3) (a), Stats., the performance standards shall be designed to meet state water quality standards.

NR 151.004 Note Note: Pursuant to s. 281.16 (3), Stats., the department of agriculture, trade and consumer protection shall develop or specify the best management practices, conservation practices or technical standards used to demonstrate compliance with a performance standard developed under s. NR 151.004.

NR 151.004 History History: CR 00-027: cr. Register September 2002 No. 561, eff. 10-1-02; CR 09-112: am. Register December 2010 No. 660, eff. 1-1-11.

NR 151.005 NR 151.005 Performance standard for total maximum daily loads. A crop producer or livestock producer subject to this chapter shall reduce discharges of pollutants from a livestock facility or cropland to surface waters if necessary to meet a load allocation in a US EPA and state approved TMDL.

NR 151.005(1) (1) A crop producer or livestock producer subject to this chapter shall use the best management practices, conservation practices, or technical standards established under ch. ATCP 50 to meet a load allocation in a US EPA and state approved TMDL.

NR 151.005(2) (2) If compliance with a more stringent or additional performance standard, other than the performance standards contained in this chapter, is required for crop producers or livestock producers to meet a load allocation in a US EPA and state approved TMDL, the department shall use the procedure in s. NR 151.004 to promulgate the more stringent or additional performance standard before compliance is required.

NR 151.005 History History: CR 09-112: cr. Register December 2010 No. 660, eff. 1-1-11.

NR 151.006 NR 151.006 Applicability of maximum extent practicable. Maximum extent practicable applies when a person who is subject to a performance standard of subchs. III and IV demonstrates to the department’s satisfaction that a performance standard is not achievable and that a lower level of performance is appropriate. In making the assertion that a performance standard is not achievable and that a level of performance different from the performance standard is the maximum extent practicable, an applicant shall take into account the best available technology, cost effectiveness, geographic features, and other competing interests such as protection of public safety and welfare, protection of endangered and threatened resources, and preservation of historic properties.

NR 151.006 History History: CR 09-112: cr. Register December 2010 No. 660, eff. 1-1-11.

subch. II of ch. NR 151 Subchapter II — Agricultural Performance Standards and Prohibitions

NR 151.01 NR 151.01 Purpose. The purpose of this subchapter is to prescribe performance standards and prohibitions in accordance with the implementation and enforcement procedures contained in ss. NR 151.09 and 151.095 for agricultural facilities, operations and practices.

NR 151.01 History History: CR 00-027: cr. Register September 2002 No. 561, eff. 10-1-02.

NR 151.015 NR 151.015 Definitions. In this subchapter:

NR 151.015(1) (1) “Accounting period” means the crop rotation period over which compliance is measured and consists of the current year and extends back the previous 7 years moving forward each consecutive year creating a rolling time period not to exceed 8 years.

NR 151.015(2) (2) “Closed depression” means a topographical basin where water ponds to a seasonal high water mark, has no external drainage, and drainage may occur either through direct conduits to groundwater or low areas where water ponds and infiltrates into the groundwater. Closed depressions may be identified using topographic maps and visual interpretation, ArcGIS tools, or other methods. A seasonal high water mark may include, but is not limited to, areas that collect and retain water for extended time periods (days or weeks) that result in areas of reduced or no crop growth.

NR 151.015(2m) (2m) “Concentrated flow channel” means a natural channel or constructed channel that has been shaped or graded to required dimensions and established in perennial vegetation for the stable conveyance of runoff. Concentrated flow channel may also include non-vegetated channels caused by ephemeral erosion, intermittent streams, drainage ditches, and drainage ends identified on the NRCS soil survey and may be identified as contiguous up-gradient deflections of contour lines on the USGS 1:24,000 scale topographic map.

NR 151.015(3) (3) “Conservation practice” means a best management practice designed to reduce or prevent soil or sediment loss to the waters of the state.

NR 151.015(4) (4) “Crop producer” means an owner or operator of an operation engaged in crop related agricultural practices specified in s. 281.16 (1) (b), Stats.

NR 151.015(5) (5) “Cropland practice” means the method, activity or management measure used to produce or harvest crops.

NR 151.015(6) (6) “County land conservation committee” means the committee created by a county board under s. 92.06, Stats. “County land conservation committee” includes employees or agents of the committee whom, with committee authorization, act on behalf of the committee.

NR 151.015(7) (7) “Direct runoff” includes any of the following:

NR 151.015(7)(a) (a) Runoff from a feedlot that can be predicted to discharge a significant amount of pollutants to surface waters of the state or to a direct conduit to ground water.

NR 151.015(7)(b) (b) Runoff of stored manure, including manure leachate, that discharges a significant amount of pollutants to surface waters of the state or to a direct conduit to ground water.

NR 151.015(7)(c) (c) Construction of a manure storage facility in permeable soils or over fractured bedrock without a liner designed in accordance with s. NR 154.04 (3).

NR 151.015(7)(d) (d) Discharge of a significant amount of leachate from stored manure to waters of the state.

NR 151.015(7m) (7m) “Established crop” means a growing annual crop, perennial crop, or cover crop that provides vegetative cover of the soil.

NR 151.015(8) (8) “Feedlot” means a barnyard, exercise area, or other outdoor area where livestock are concentrated for feeding or other purposes and self-sustaining vegetative cover is not maintained. “Feedlot” does not include a winter grazing area or a bare soil area such as a cattle lane or a supplemental feeding area located within a pasture, provided that the bare soil area is not a significant source of pollution to waters of the state.

NR 151.015(8d) (8d) “Incorporation” has the meaning given in s. NR 243.03 (28).

NR 151.015(8h) (8h) “Infield bedrock verification” means determining bedrock depth using available data which may include well construction reports, location of drill cores or other subsurface investigations, location of quarries and natural bedrock outcrops, geophysical investigations, and uneven crop growth patterns that are linked to fracture traces in the field.

NR 151.015(8p) (8p) “Injection” has the meaning given in s. NR 243.03 (29).

NR 151.015(8t) (8t) “Liquid manure” has the meaning given in s. NR 243.03 (32) when applied to facilities subject to ch. NR 243, and the meaning given in UW A2809 for all other agricultural facilities where manure is generated.

NR 151.015 Note Note: Copies of the University of Wisconsin — Extension publication A2809 Nutrient Application Guidelines for Field, Vegetable, and Fruit Crops in Wisconsin, dated 2012 (A2809) may be inspected at the office of the department, the Wisconsin Department of Agriculture, Trade and Consumer Protection and the legislative reference bureau, Madison, Wisconsin. A2809 is also available electronically at: http://learningstore.uwex.edu/assets/pdfs/A2809.pdf.

NR 151.015(9) (9) “Livestock facility” means a structure or system constructed or established on a livestock operation.

NR 151.015(10) (10) “Livestock producer” means an owner or operator of a livestock operation.

NR 151.015(11) (11) “Livestock operation” has the meaning given in s. 281.16 (1) (c), Stats.

NR 151.015(11m) (11m) “Long term no-till” means no-till farming that has been implemented a minimum of 3 consecutive years.

NR 151.015(12) (12) “Manure” means a material that consists primarily of excreta from livestock, poultry or other animals.

NR 151.015(13) (13) “Manure storage facility” means an impoundment made by constructing an embankment or excavating a pit or dugout or by fabricating a structure to contain manure and other animal or agricultural wastes.

NR 151.015(13g) (13g) “Margin of safety level” has the meaning given it in s. NR 243.03 (37).

NR 151.015(13j) (13j) “Mechanical application” means surface application, injection, or incorporation of manure on cropland or pastures using manure hauling vehicles or equipment.

NR 151.015(13m) (13m) “Municipality” has the meaning given in s. 281.01 (6), Stats.

NR 151.015(14) (14) “NOD” means a notice of discharge issued under s. NR 243.24 (4).

NR 151.015(15) (15) “Operator” means a person responsible for the oversight or management of equipment, facilities or livestock at a livestock operation, or is responsible for land management in the production of crops.

NR 151.015(15e) (15e) “Overflow” means discharge of manure to the environment resulting from flow over the brim of a facility or from flow directed onto the ground through a man-made device including a pump or pipe.

NR 151.015(15m) (15m) “Pasture” means land on which livestock graze or otherwise seek feed in a manner that maintains the vegetative cover over the grazing area. Pasture may include limited areas of bare soil such as cattle lanes and supplemental feeding areas provided the bare soil areas are not significant sources of pollution to waters of the state.

NR 151.015(15n) (15n) “Pathogens” has the meaning given in s. NR 204.03 (38).

NR 151.015(15s) (15s) “Phosphorus index” or “P-index” means Wisconsin’s agricultural land management planning tool for assessing the potential of a cropped or grazed field to contribute phosphorus to the surface water.

NR 151.015(15w) (15w) “Pre-tillage” means using mechanical equipment to reduce soil preferential flow paths, worm holes, root holes, and cracks by turning and mixing the soil prior to and at least 2 inches below the depth of manure application.

NR 151.015(16) (16) “Process wastewater” has the meaning given in s. NR 243.03 (53).

NR 151.015(17) (17) “Silurian bedrock” means the area in Wisconsin where the bedrock consists of Silurian dolomite with a depth to bedrock of 20 feet or less. This area comprises portions of the following counties: Brown, Calumet, Dodge, Door, Fond du Lac, Kenosha, Kewaunee, Manitowoc, Milwaukee, Outagamie, Ozaukee, Racine, Sheboygan, Walworth, Washington, and Waukesha. Areas where Silurian bedrock occurs in Wisconsin can be identified by the most current NRCS, Wisconsin Geological Natural History Survey, department of agriculture, trade and consumer protection, department of natural resources, county maps, or infield bedrock verification methods.

NR 151.015(18) (18) “Site that is susceptible to groundwater contamination” under s. 281.16 (1) (g), Stats., means any one of the following:

NR 151.015(18)(a) (a) An area within 250 feet of a private well.

NR 151.015(18)(b) (b) An area within 1000 feet of a municipal well.