PSC 128.14(1)(1) Definitions. In this section, nighttime hours are the hours beginning at 10:00 p.m. and ending at 6:00 a.m. daily and daytime hours are the hours beginning at 6:00 a.m. and ending at 10:00 p.m. daily.

PSC 128.14(2)(a)(a) The noise limits in this section apply at the outside wall of a nonparticipating residence or occupied community building that exists when the owner gives notice under s. PSC 128.105 (1) or for which complete publicly-available plans for construction are on file with a political subdivision within 30 days of the date on which the owner gives notice under s. PSC 128.105 (1).

PSC 128.14(2)(b)(b) An owner shall design the proposed wind energy system to minimize noise at a residence or occupied community building to the extent reasonably practicable.

PSC 128.14(2)(c)(c) An owner shall design a wind energy system to comply with the noise standards in this section under planned operating conditions.

PSC 128.14(3)(a)(a) Except as provided in par. (b), subs. (4) (c) and (5), an owner shall operate the wind energy system so that the noise attributable to the wind energy system does not exceed 50 dBA during daytime hours and 45 dBA during nighttime hours.

PSC 128.14(3)(b)(b) In the event audible noise due to wind energy system operations contains a steady pure tone, such as a whine, whistle, screech, or hum, the owner shall promptly take corrective action to permanently eliminate the noise. This paragraph does not apply to sound the wind energy system produces under normal operating conditions.

PSC 128.14(4)(a)(a) If an owner uses sound level measurements to evaluate compliance with this section at a nonparticipating residence or occupied community building, those measurements shall be made as near as possible to the outside wall nearest to the closest wind turbine, or at an alternate wall as specified by the owner of the nonparticipating residence or occupied community building. The owner may take additional measurements to evaluate compliance in addition to those specified by this section.

PSC 128.14(4)(b)(b) Upon receipt of a complaint regarding a violation of the noise standards in sub. (3) (a), an owner shall test for compliance with the noise limits in sub. (3) (a). A political subdivision or monitoring committee established under s. PSC 128.41 may not require additional testing to show compliance with sub. (3) (a) if the owner has provided the results of an accurate test conducted within 2 years of the date of the complaint showing that the wind energy system is in compliance with sub. (3) (a) at the location relating to the complaint.

PSC 128.14(4)(c)(c) Methods available for the owner to comply with sub. (3) shall include operational curtailment of one or more wind turbines. Upon receipt of a complaint about a noise under sub. (3) (b), the owner shall use operational curtailment to eliminate the noise until the owner permanently corrects the problem.

PSC 128.14(4)(d)(d) An owner shall evaluate compliance with sub. (3) (a) as part of pre- and post-construction noise studies. An owner shall conduct pre- and post-construction noise studies under the most current version of the noise measurement protocol as described in s. PSC 128.50 (2).

PSC 128.14(5)(5) Waiver. Upon request by an owner of a wind energy system, an owner of an affected nonparticipating residence or occupied community building may relieve the owner of the wind energy system of the requirement to meet any of the noise limits in this section at the affected residence or occupied community building by written contract with the wind energy system owner. Unless otherwise provided in a contract signed by an owner of an affected nonparticipating residence or occupied community building, a waiver by an owner of an affected nonparticipating residence or occupied community building is an encumbrance on the real property, runs with the land until the wind energy system is decommissioned, and shall be recorded under ch. 706, Stats.

PSC 128.14(6)(a)(a) Before entering into a contract under sub. (5), an owner of a wind energy system shall provide written notice of the requirements of this section to the owner of an affected nonparticipating residence or occupied community building.

PSC 128.14(6)(b)(b) Before the initial operation of the wind energy system, an owner of a wind energy system shall provide notice of the requirements of this section to an owner of a nonparticipating residence or occupied community building within 0.5 mile of a constructed wind turbine that has not entered into a contract under sub. (5).

PSC 128.15(1)(a)(a) The shadow flicker requirements in this section apply to a nonparticipating residence or occupied community building that exists when the owner gives notice under s. PSC 128.105 (1) or for which complete publicly-available plans for construction are on file with a political subdivision within 30 days of the date on which the owner gives notice under s. PSC 128.105 (1).

PSC 128.15(1)(b)(b) An owner shall design the proposed wind energy system to minimize shadow flicker at a residence or occupied community building to the extent reasonably practicable.

PSC 128.15(1)(c)(c) An owner shall use shadow flicker computer modeling to estimate the amount of shadow flicker anticipated to be caused by a wind energy system and shall design the wind energy system so that computer modeling indicates that no nonparticipating residence or occupied community building will experience more than 30 hours per year of shadow flicker under planned operating conditions.

PSC 128.15(2)(2) Shadow flicker limits. An owner shall operate the wind energy system in a manner that does not cause more than 30 hours per year of shadow flicker at a nonparticipating residence or occupied community building. If a nonparticipating residence or occupied community building experiences more than 30 hours per year of shadow flicker under the wind energy system’s normal operating conditions, the owner shall use operational curtailment to comply with this subsection.

PSC 128.15(3)(a)(a) An owner of a wind energy system shall work with an owner of a nonparticipating residence or occupied community building to mitigate the effects of shadow flicker to the extent reasonably practicable.

PSC 128.15(3)(b)(b) An owner shall provide reasonable shadow flicker mitigation at the owner’s expense for a nonparticipating residence or occupied community building experiencing 20 hours or more per year of shadow flicker.

PSC 128.15(3)(c)(c) An owner shall model shadow flicker and a nonparticipating residence or occupied community building is eligible for mitigation if computer modeling shows that shadow flicker at the nonparticipating residence or occupied community building will be 20 hours or more per year. An owner of a nonparticipating residence or occupied community building is not required to document the actual hours per year of shadow flicker if modeling indicates the nonparticipating residence or occupied community building is eligible for mitigation. A nonparticipating residence or occupied community building that experiences 20 hours or more per year of shadow flicker based on records kept by the resident of a nonparticipating residence or the occupant of an occupied community building shall also be eligible for mitigation.

PSC 128.15(3)(d)(d) An owner may provide shadow flicker mitigation for any residence or occupied community building in addition to the mitigation required under par. (b).