NR 320.06(2)(c)6. 6. Placement, repair and removal of the structure shall minimize the removal of trees, shrubs and other shoreline vegetation above the ordinary high water mark.

NR 320.06 Note Note: Local zoning ordinances may place restrictions on activities located in mapped floodplains or in shoreland zones. The riparian is responsible for ensuring that their project is in compliance with any local zoning requirements as well as the provisions of this chapter.

NR 320.06(2)(c)7. 7. Approach fill shall be a maximum of one foot deep at the bank and 0 feet at 15 feet landward of the bank. If depth of greater than one foot of approach fill is required or the approach must be located in a wetland, it shall be of an open ramp style that does not impede flow. Geotextile fabric shall be placed under approach fill to facilitate removal and reduce soil compaction.

NR 320.06(2)(c)8. 8. Accumulated brush, debris and other obstructions that are trapped in or underneath the structure shall be regularly removed to prevent upstream flooding and maintain structural integrity.

NR 320.06(2)(c)9. 9. The permittee shall submit a series of photographs to the department within one week of placing the structure on this site and within one week of stabilizing disturbed areas on the site after the removal of the structure. The photographs shall be taken from different vantage points and depict all work authorized by the permit.

NR 320.06(2)(c)10. 10. To stop the spread of invasive species and viruses from one navigable waterway to another navigable waterway, all equipment or portions of equipment used for constructing, operating, or maintaining the project, including tracked vehicles, barges, boats, silt or turbidity curtains, hoses, sheet piles, and pumps, shall be decontaminated for invasive species and viruses before and after use or prior to use within another navigable waterway. Decontamination activities shall be performed by taking actions specified in subd. 10. a. to c. or h. Decontamination shall include either subd. 10. d., e., f., g., or h. for any equipment, or portions of equipment, that is used in non-frozen navigable waters when the air temperature is above 19 degrees Fahrenheit at the time the decontamination procedures take place.

NR 320.06(2)(c)10.a. a. Inspect all equipment used for constructing, operating, or maintaining the project and remove all plants and animals, and other mud, debris, etc.

NR 320.06(2)(c)10.b. b. Drain all water from equipment used in navigable waters.

NR 320.06 Note Note: This does not apply to water in closed engine cooling systems or water tanks, or containers of potable drinking water or other beverages meant for human consumption. If a tanker truck discharges water collected from navigable waters in upland areas, the tank does not require disinfection.

NR 320.06(2)(c)10.c. c. Dispose of plants and animals in the trash. An operator may not transfer plants or animals or water from one navigable waterway to another.

NR 320.06(2)(c)10.d. d. Wash equipment at a temperature of not less than 212 degrees Fahrenheit water (steam clean).

NR 320.06(2)(c)10.e. e. Wash equipment with soap and water or high pressure water of not less than 2000 pounds per square inch.

NR 320.06(2)(c)10.f. f. Allow equipment to dry thoroughly for not less than 5 days.

NR 320.06 Note Note: Additional drying techniques including drying through natural or mechanical means or changes in drying duration may be submitted to the department for review and approval.

NR 320.06(2)(c)10.g. g. Disinfect equipment with 200 parts per million (0.5 ounces per gallon) chlorine for not less than 10 minute contact time. Every effort should be made to keep the disinfection solution and rinse water out of surface waters.

NR 320.06 Note Note: Chlorine refers to either household bleach solution (5.25% chlorine) or granular chlorine (70% calcium hypochlorite)

NR 320.06(2)(c)10.h. h. Follow the most recent department approved disinfection protocols or department approved best management practices for infested waters. The department shall maintain on its website and make available at its offices a list of the most recent disinfection protocols or department approved best management practices for invasive species and viruses.

NR 320.06 Note Note: See the department’s website at dnr.wi.gov under the topic “Waterway and Wetlands”. Recommendations for additional disinfection or decontamination protocols or department approved best management practices may be submitted to the department for review and approval to be added to this list.

NR 320.06(2)(d) (d) Standards for placement of clear span bridges over navigable streams.

NR 320.06(2)(d)1. 1. The clear span bridge may only span a navigable stream that is less than 35 feet wide, measured from ordinary high water mark to ordinary high water mark.

NR 320.06(2)(d)2. 2. The clear span bridge may not be located on a wild river designated under ch. NR 302, or where similar federal, state or local regulations prohibit the construction.

NR 320.06(2)(d)3. 3. At least one end of the bridge structure shall be firmly anchored in a manner that the bridge will not be transported downstream during flood conditions.

NR 320.06(2)(d)4. 4. The bridge shall completely span the navigable stream from top of channel to top of channel with no support pilings in the stream.

NR 320.06(2)(e) (e) Standards for culvert placement on navigable streams without a professionally engineered culvert design.

NR 320.06(2)(e)1. 1. Culvert placement may not occur in a public rights feature as described in s. NR 1.06.

NR 320.06(2)(e)2. 2. The required culvert area may not exceed 20 square feet as calculated in s. NR 320.07 (1).

NR 320.06(2)(e)3. 3. Culvert placement and installation shall mimic the natural streambed and gradient above and below the culvert channel. Perched culverts are not in compliance with this condition.

NR 320.06(2)(e)4. 4. If flow conditions require the use of a multiple culvert arrangement, culverts shall be placed at varying elevations, one in the bed and the other at 4″ to 8″ higher, to facilitate base and low flows as well as larger rain or snowmelt events.

NR 320.06(2)(e)5. 5. Both ends of the culvert shall be installed so a minimum of 4″ and a maximum of 8″ for a round culvert and 6″ for a pipe arch culvert lies below the bed of the waterway.