NR 151.24(6)(b)3.3. Best management practices such as filter strips, swales or wet detention basins, that are designed to control pollutants from nonpoint sources may be located in the protective width area. NR 151.24 NoteNote: Other regulations, such as ch. 30, Stats., and chs. NR 103, 115, 116 and 117 and their associated review and approval process may apply in the protective area. NR 151.24(6)(b)4.b.b. Transportation facilities that cross or access surface waters, such as boat landings, bridges and culverts. NR 151.24(6)(b)4.d.d. Transportation facilities from which runoff does not enter the surface water, except to the extent that vegetative ground cover is necessary to maintain bank stability. NR 151.24 NoteNote: A vegetated protective area to filter runoff pollutants from transportation facilities described in subd. 4. d. is not necessary since runoff is not entering the surface water at that location. Other practices necessary to meet requirements of this section, such as a swale or basin, will need to be designed and implemented to reduce runoff pollutants prior to runoff entering a surface water of the state.
NR 151.24(7)(7) Fueling and vehicle maintenance areas. Fueling and vehicle maintenance areas shall, to the maximum extent practicable, have BMPs designed, installed and maintained to reduce petroleum within runoff, such that the runoff that enters waters of the state contains no visible petroleum sheen. NR 151.24 NoteNote: A combination of the following BMPs may be used: oil and grease separators, canopies, petroleum spill cleanup materials, or any other structural or non-structural method of preventing or treating petroleum in runoff.
NR 151.24(8)(8) Location. To comply with the standards required under this section, BMPs may be located on-site or off-site as part of a regional storm water device, practice or system, but shall be installed in accordance with s. NR 151.003. NR 151.24(9)(9) Timing. The BMPs required under this section shall be installed before the construction site has undergone final stabilization. NR 151.24(10)(a)(a) Applicability. Except as provided in par. (b), transportation facilities that use swales for runoff conveyance and pollutant removal meet all of the requirements of this section, if the swales are designed to the maximum extent practicable to do all of the following: NR 151.24(10)(a)1.1. Be vegetated. However, where appropriate, non-vegetative measures may be employed to prevent erosion or provide for runoff treatment, such as rock riprap stabilization or check dams. NR 151.24 NoteNote: It is preferred that tall and dense vegetation be maintained within the swale due to its greater effectiveness at enhancing runoff pollutant removal.
NR 151.24(10)(a)2.2. Carry runoff through a swale for 200 feet or more in length that is designed with a flow velocity no greater than 1.5 feet per second for the peak flow generated using either a 2-year, 24-hour design storm or a 2-year design storm with a duration equal to the time of concentration as appropriate. If a swale of 200 feet in length cannot be designed with a flow velocity of 1.5 feet per second or less, the flow velocity shall be reduced to the maximum extent practicable. NR 151.24 NoteNote: Check dams may be included in the swale design to slow runoff flows and improve pollutant removal. Transportation facilities with continuous features such as curb and gutter, sidewalks or parking lanes do not comply with the design requirements of this subsection. However, a limited amount of structural measures such as curb and gutter may be allowed as necessary to account for other concerns such as human safety or resource protection.
NR 151.24(10)(b)1.1. Notwithstanding par. (a), the department may, consistent with water quality standards, require other provisions of this section, in addition to swale treatment, be met on a transportation facility with an average daily traffic rate greater than 2500 and where the initial surface water of the state that the runoff directly enters is any of the following: NR 151.24(10)(b)1.c.c. Waters listed in section 303 (d) of the federal clean water act that are identified as impaired in whole or in part, due to nonpoint source impacts. NR 151.24(10)(b)2.2. The transportation facility authority shall contact the department’s regional storm water staff or the department’s liaison to the department of transportation to determine if additional BMPs beyond a water quality swale are needed under this paragraph. NR 151.241NR 151.241 Post-construction performance standards. NR 151.241(1)(1) General. In ss. NR 151.241 to 151.249, “post-construction site” means a construction site subject to regulation under this subchapter, after construction is completed and final stabilization has occurred. NR 151.241(2)(2) Applicability. Sections NR 151.241 to 151.249 apply to a transportation facility post-construction site that is or was subject to the construction performance standards of s. NR 151.23, except any of the following: