NR 111.03 NoteNote: This definition is intended to prevent the conversion of entrainable organisms to counts of impingement or impingement mortality.
NR 111.03(21)(21) “Impingement mortality” means death as a result of impingement. “Impingement mortality” also includes the inevitable mortality of organisms due to their removal from their natural ecosystem and lack of ability to escape the cooling water intake system. NR 111.03(22)(22) “Independent supplier” means an entity, other than the regulated facility, that owns and operates its own cooling water intake structure; directly withdraws water from surface waters of the state; and provides the cooling water to other facilities for their use, regardless of whether the entity also retains a portion of the water for its own use. “Independent supplier” does not include an entity that provides potable water to residential populations such as a public water system. NR 111.03(23)(23) “Lake or reservoir” means any inland body of open water with some minimum surface area free of rooted vegetation and with an average hydraulic retention time of more than 7 days. “Lake or reservoir” includes a flow-through reservoir with an average hydraulic retention time of greater than 7 days. NR 111.03 NoteNote: Lakes or reservoirs might be natural waterbodies or impounded streams, surrounded by land or by land and a man-made retainer, such as a dam. Lakes or reservoirs might be fed by rivers, streams, springs, or local precipitation.
NR 111.03(24)(24) “Latent mortality” means the delayed mortality of organisms that were initially alive upon being impinged or entrained but that do not survive the delayed effects of impingement and entrainment during an extended holding period. “Delayed effects of impingement and entrainment” includes temperature change, physical stress, and chemical stress. NR 111.03(25)(25) “Maximize” means to increase to the greatest amount, extent, or degree reasonably possible. NR 111.03(26)(26) “Maximum design intake velocity” means the value assigned during the cooling water intake structure design to the maximum instantaneous speed at which the cooling system is capable of withdrawing water through the intake screen or inlet from a source waterbody, applied at all points between the point at which water is withdrawn from a water of the state and the first screen or other structure that has a mesh with a maximum distance in the openings of 0.56 inches, and calculated using the following equation: where:
V = the maximum design intake velocity.
Q = the maximum volumetric flow rate based on pump capacities, excluding emergency and redundant pumps.
A = typical wetted area of the screen at Q7,10 flows.
P = screen open area percentage divided by 100.
For a facility that uses other intake designs that do not use a screen, the maximum design intake velocity shall be determined using an alternate method approved by the department.
NR 111.03(28)(28) “Minimize” means to reduce to the smallest amount, extent, or degree reasonably possible. NR 111.03(29)(29) “Modified traveling screen” means a traveling water screen that incorporates measures protective of fish and shellfish, including all of the following: NR 111.03(29)(a)(a) A screen with a collection bucket or an equivalent mechanism designed to minimize turbulence to aquatic life. NR 111.03(29)(b)(b) The addition of a guard rail or barrier to prevent loss of fish from the collection system or the replacement of screen panel materials with smooth woven mesh, drilled mesh, molded mesh, or similar materials that protect fish from descaling and other abrasive injury. NR 111.03(29)(c)(c) The continuous or near-continuous rotation of screens and operation of fish collection equipment to ensure any impinged organisms are recovered as soon as practical. NR 111.03(29)(d)(d) A low pressure wash or gentle vacuum to remove fish prior to any high pressure spray to remove debris from the screens. NR 111.03(29)(e)(e) A fish handling and return system with sufficient water flow to return the fish directly to the source water in a manner that does not promote predation or re-impingement of the fish or require a large vertical drop. The department may approve of fish being returned to water sources other than the original source water, taking into account any recommendations from the U.S. fish and wildlife service with respect to endangered or threatened species. NR 111.03 NoteNote: Examples of modified traveling screens include Modified Ristroph screens with a fish handling and return system, dual flow screens with smooth mesh, and rotary screens with fish returns or vacuum returns.
NR 111.03(31)(31) “Natural thermal stratification” means the naturally occurring division of a waterbody into horizontal layers of differing densities as a result of variations in the temperature at different depths. NR 111.03 NoteNote: Examples of new facilities are provided in 40 CFR 125.83. This definition is intended to be equivalent to the definition of “new facility” in 40 CFR 125.83. NR 111.03(33)(33) “New unit” means a new stand-alone unit at an existing facility on which construction began after October 14, 2014 and that is not otherwise classified as a new facility under s. NR 111.02 (3) or that is not otherwise already subject to subch. III, regardless of whether it has its own dedicated cooling water intake structure or uses an existing one. In this subsection, “stand-alone unit” means a separate unit that is added to a facility for either the same general industrial operation or another purpose. NR 111.03 NoteNote: A new unit may have its own dedicated cooling water intake structure, or the new unit may use an existing or modified cooling water intake structure.
NR 111.03(34)(34) “Nuisance species” means common carp (Cyprinus carpio), grass carp (Ctenopharyngodon idella), silver carp (Hypophthalmichthys molitrix), bighead carp (Aristichthys nobilis), black carp (Mylopharyngodon piceus), goldfish (Carassius auratus), sea lamprey (Petromyzon marinus), alewife (Alosa pseudoharengus) except in Lake Michigan and Lake Superior, rainbow smelt (Osmerus mordax) except in Lake Michigan and Lake Superior, threespine stickleback (Gasterosteus aculeatus), white perch (Morone americana) except in Lake Michigan and Lake Superior, ruffe (Gymnocephalus cernuus), tubenose goby (Proterorhinus marmoratus), round goby (Apollonia melanostomus), rusty crayfish (Orocnectes rusticus), red swamp crayfish (Procambarus clarkii), the species listed in ss. NR 40.04 (2) (c) and 40.05 (2) (c), the shellfish species listed in ss. NR 40.04 (2) (d) and 40.05 (2) (d), and any species subsequently added by the department. “Nuisance species” also includes the species designated by the department as detrimental in the waters of the state specified in s. NR 20.38. NR 111.03(35)(35) “Offshore velocity cap” means an open intake designed to change the direction of water withdrawal from vertical to horizontal, thereby creating horizontal velocity patterns that result in avoidance of the intake by fish and other aquatic organisms, and that satisfies all of the following: NR 111.03(35)(b)(b) It uses bar screens or otherwise excludes large aquatic organisms. NR 111.03(36)(36) “Operational measure” means a modification to any operation that serves to minimize impact to all life stages of fish and shellfish from the cooling water intake structure. NR 111.03 NoteNote: Examples of “operational measures” include more frequent rotation of traveling screens, use of a low pressure wash to remove fish prior to any high pressure spray to remove debris, maintaining adequate volume of water in a fish return, and debris minimization measures such as air sparging of intake screens or other measures taken to maintain the design intake velocity.
NR 111.03(37)(37) “River or stream” means a lotic, or free-flowing, system. “River or stream” includes a flow-through reservoir with a retention time of 7 days or less. NR 111.03(38)(38) “Q7,10 flow” means the average minimum 7-day low streamflow which occurs once in 10 years. NR 111.03(39)(39) “Social benefits” means the increase in social welfare, including physical and biological effects on the environment, that results from taking an action. “Social benefits” includes private benefits and those benefits not taken into consideration by private decision makers in the actions they choose to take, including effects occurring in the future. Benefits are generally treated one or more of 3 ways: A narrative containing a qualitative discussion of environmental effects, a quantified analysis expressed in physical or biological units, and a monetized benefits analysis in which dollar values are applied to quantified physical or biological units. The dollar values in a social benefits analysis are based on the principle of willingness-to-pay, which captures monetary benefits by measuring what individuals are willing to forgo in order to enjoy a particular benefit. Willingness-to-pay for nonuse values can be measured using benefits transfer or a stated preference survey. NR 111.03(40)(40) “Social costs” means costs estimated from the viewpoint of society, rather than individual stakeholders, representing the total burden imposed on the economy and consisting of the sum of all opportunity costs incurred associated with taking actions. “Opportunity costs” means the value lost to society of all the goods and services that will not be produced and consumed as a facility complies with permit requirements, and society reallocates resources away from other production activities and toward minimizing adverse environmental impacts. NR 111.03(41)(41) “Source water” means the water of the state from which the cooling water is withdrawn. NR 111.03(42)(42) “Thermocline” means the middle layer of a thermally stratified lake or reservoir where there is a rapid decrease in temperatures. NR 111.03(43)(43) “Threatened and endangered species” or “threatened or endangered species” means all species listed in s. NR 27.03. NR 111.03(44)(44) “WPDES” means the Wisconsin pollutant discharge elimination system. NR 111.03 HistoryHistory: CR 19-105: cr. Register May 2020 No. 773, eff. 6-1-20; correction in (5) (b) (intro.), (16) made under s. 35.17, Stats., Register May 2020 No. 773. NR 111.10NR 111.10 Requirement to comply with BTA standards. NR 111.10(1)(1) The owner or operator of an existing facility that meets the applicability criteria specified in s. NR 111.02 shall at a minimum do all of the following: NR 111.10(1)(a)(a) Comply with the BTA standards for impingement mortality under s. NR 111.12 and entrainment under s. NR 111.13, including any measures to protect threatened and endangered species and federally designated critical habitat established under ss. NR 111.11 (2) (a) and 111.16. NR 111.10(2)(2) The requirements specified in sub. (1) shall be implemented through a WPDES permit for each facility subject to this subchapter. Based on the information submitted in the permit application, the department shall determine the requirements and conditions to include in the permit. NR 111.10 HistoryHistory: CR 19-105: cr. Register May 2020 No. 773, eff. 6-1-20. NR 111.11NR 111.11 Timing of BTA determinations. NR 111.11(1)(a)(a) Permits expiring after July 14, 2018. The owner or operator of an existing facility whose currently effective permit expires after July 14, 2018 shall submit to the department the information required in the applicable provisions of subch. V when applying for a subsequent permit. NR 111.11(1)(b)(b) Permits expiring on or after October 14, 2014 and prior to or on July 14, 2018. The owner or operator of a facility whose currently effective permit expires on or after October 14, 2014, and prior to or on July 14, 2018, may request that the department establish an alternate schedule for the submission of the information required under subch. V when applying for a subsequent permit. If the owner or operator of the facility demonstrates that it cannot develop the required information by the applicable date for submission, the department shall establish an alternate schedule for submission of the required information. NR 111.11(2)(a)(a) Reissuance of permits that expired after July 14, 2018 and permits that expired on or prior to July 14, 2018 that did not receive an alternate schedule. In the case of reissuance of any permit that expired after July 14, 2018 and in the case of reissuance of any permits expiring on or prior to July 14, 2018, that did not receive an alternate schedule under sub. (1) (b), the department shall include in the reissued permit, at a minimum, conditions to implement and ensure compliance with the impingement mortality standard specified in s. NR 111.12 and the entrainment standard specified in s. NR 111.13, including any measures to protect threatened and endangered species and federally designated critical habitat required by the department. In addition, the department shall include in the permit conditions, management practices, and operational measures necessary to ensure proper operation of any technology used to comply with these standards. NR 111.11(2)(b)(b) Permits receiving an alternate schedule. In the case of any permit for which the department, under sub. (1) (b), has established an alternate schedule for submission of the information required under subch. V, the department may include permit conditions to ensure that, for any subsequent permit, the department has all the information required under subch. V necessary to establish impingement mortality and entrainment BTA requirements under ss. NR 111.12 and 111.13. In addition, the department shall establish interim BTA requirements in the permit based on the department’s best professional judgment on a site-specific basis. NR 111.11(2)(c)(c) Permits issued after October 14, 2014 and applied for before October 14, 2014. NR 111.11(2)(c)1.1. In the case of any permit issued after October 14, 2014, and applied for before October 14, 2014, the department may include permit conditions to ensure that the department has all the information under subch. V necessary to establish impingement mortality and entrainment BTA requirements under ss. NR 111.12 and 111.13 for the subsequent permit. The department shall establish interim BTA requirements in the permit on a site-specific basis based on the department’s best professional judgment. NR 111.11(2)(c)2.2. In the case of permit proceedings that have begun prior to October 14, 2014, whenever the department has determined that the information already submitted by the owner or operator of the facility is sufficient, the department may proceed with a determination of BTA standards for impingement mortality and entrainment without requiring the owner or operator of the facility to submit the information required under subch. V. The department’s BTA determination may be based on some or all of the factors specified in s. NR 111.13 (2) and (3) and the BTA standards for impingement mortality specified in s. NR 111.12. In making the decision on whether to require additional information from the applicant, and what BTA requirements to include in the applicant’s permit for impingement mortality and site-specific entrainment, the department shall consider whether any of the information under subch. V is necessary. NR 111.11(3)(a)(a) Generally. After issuance of a final permit establishing the entrainment requirements under s. NR 111.13, the owner or operator of an existing facility shall comply with the impingement mortality and entrainment standards as soon as practicable, based on a schedule of requirements established by the department. The department may establish interim compliance milestones in the permit. NR 111.11(3)(b)(b) Electric power generating facilities. When establishing a schedule under par. (a) for an electric generating facility, the department may consider measures to maintain adequate energy reliability and necessary grid reserve capacity during any facility outage. These may include establishing a staggered schedule for multiple facilities serving the same localities. The department may confer with independent system operators and state public utility regulatory agencies when establishing a schedule for electric power generating facilities. NR 111.11(3)(c)(c) Manufacturing facilities. The department may consider extenuating circumstances, such as lengthy scheduled shutdowns or future production schedules, in establishing a compliance schedule under par. (a) for any manufacturing facility. NR 111.11 HistoryHistory: CR 19-105: cr. Register May 2020 No. 773, eff. 6-1-20; correction in (1) (b), (2) (a), (c) 1. made under s. 35.17, Stats., Register May 2020 No. 773. NR 111.12NR 111.12 Impingement mortality BTA standards. NR 111.12(1)(a)(a) Generally. Except when approved by the department as provided in par. (b) and subs. (3) and (4), the owner or operator of an existing facility shall comply with one of the following alternatives, subject to the additional requirements specified in sub. (2) or s. NR 111.16 (1) if the department requires such additional measures: NR 111.12(1)(a)1.1. ‘Closed cycle recirculating system.’ Operate a closed-cycle recirculating system as defined in s. NR 111.03 (5). In addition, the owner or operator of a facility shall monitor the actual intake flows at a minimum frequency of daily. The monitoring shall be representative of normal operating conditions and shall include measuring cooling water withdrawals, make-up water, and blowdown volume. In lieu of daily intake flow monitoring, the owner or operator of a facility may monitor cycles of concentration at a minimum frequency of daily. NR 111.12(1)(a)2.2. ‘0.5 Feet per second maximum design intake velocity.’ Operate a cooling water intake structure that has a maximum design intake velocity less than or equal to 0.5 feet per second. The owner or operator of the facility shall submit information to the department that demonstrates that the maximum design intake velocity does not exceed 0.5 feet per second. The maximum velocity shall be achieved under all conditions, including during source water surface elevations associated with Q7,10 flows and during periods of maximum head loss across the screens or other devices during normal operation of the intake structure. The maximum design intake velocity shall be calculated using the method specified in s. NR 111.03 (26). NR 111.12(1)(a)3.3. ‘0.5 Feet per second actual intake velocity.’ Operate a cooling water intake structure that has a maximum intake velocity less than or equal to 0.5 feet per second. The owner or operator of the facility shall submit information to the department that demonstrates that the maximum actual intake velocity does not exceed 0.5 feet per second at the point with the smallest open area between the point at which water is withdrawn from a water of the state and the first screen. The maximum velocity shall be achieved under all conditions, including during source water surface elevations associated with Q7,10 flows and during periods of maximum head loss across the screens or other devices during normal operation of the intake structure. The department may authorize the owner or operator of the facility to exceed the 0.5 feet per second velocity at an intake for brief periods for the purpose of maintaining the cooling water intake system, such as backwashing the screen face. In addition, the owner or operator of the facility shall monitor the velocity at the intake continuously and report any exceedances of 0.5 feet per second. In lieu of velocity monitoring at the intake, the owner or operator of the facility may calculate the actual intake velocity as follows: where:
V = the actual intake velocity.
Q = the actual intake flow rate based on monitoring.
A = wetted area of the screen at the given water depth.
P = screen open area percentage divided by 100.
NR 111.12(1)(a)4.4. ‘Existing offshore velocity cap.’ Operate an existing offshore velocity cap that was installed on or before October 14, 2014. Offshore velocity caps installed after October 14, 2014 shall make either a demonstration under subd. 6. or meet the performance standard under subd. 7. In addition, the facility shall monitor total daily intake flow. NR 111.12(1)(a)5.5. ‘Modified traveling screens.’ Operate a modified traveling screen that the department determines meets the definition specified in s. NR 111.03 (29) and that, after review of the information required in the impingement technology performance optimization study specified in s. NR 111.41 (5), the department determines is the BTA for impingement reduction at the site. As the basis for the department’s determination, the owner or operator of the facility shall demonstrate that the technology is or will be optimized to minimize impingement mortality of all species except those designated as fragile or nuisance. The permit shall include verifiable and enforceable permit conditions that ensure the technology will perform as demonstrated. NR 111.12(1)(a)6.6. ‘Systems of technologies as the BTA for impingement mortality.’ Operate a system of technologies, management practices, and operational measures that, after review of the information required in the impingement technology performance optimization study specified in s. NR 111.41 (5), the department determines is the BTA for impingement reduction at the facility’s cooling water intake structure. As the basis for the department’s determination, the owner or operator of the facility shall demonstrate that the system of technologies has been optimized to minimize impingement mortality of all species except those designated as fragile or nuisance. In addition, the department’s decision will be informed by comparing the impingement mortality performance data under s. NR 111.41 (5) to a performance standard of no more than 24 percent impingement mortality, including latent mortality and excluding fragile and nuisance species. The permit shall include verifiable and enforceable permit conditions that ensure the system of technologies will perform as demonstrated. NR 111.12(1)(a)7.7. ‘Impingement mortality performance standard.’ Achieve a 12-month impingement mortality performance standard of all life stages of fish and shellfish of no more than 24 percent mortality, including latent mortality, for all species together, except those designated as fragile or nuisance, that are collected or retained in a sieve with maximum opening dimension of 0.56 inches and kept for a holding period of 18 to 96 hours. The department may prescribe an alternative holding period. The facility shall conduct biological monitoring at a minimum frequency of monthly to demonstrate its impingement mortality performance. Each month, the facility shall use all of the monitoring data collected during the previous 12 months to calculate the 12-month survival percentage. The 12-month impingement mortality survival performance standard is the total number of fish killed divided by the total number of fish impinged over the course of the entire 12 months. The owner or operator of the facility shall choose whether to demonstrate compliance with this requirement for the entire facility, or for each individual cooling water intake structure for which this subdivision is the selected impingement mortality requirement. NR 111.12(1)(b)1.1. ‘De minimis rate of impingement.’ In limited circumstances, rates of impingement may be so low at a facility that additional impingement controls may not be justified. The department, based on review of site-specific data submitted under subch. V, may conclude that the documented rate of impingement at the cooling water intake is so low that no additional controls are warranted. Notice of a determination that no additional impingement controls are warranted shall be included in the draft or proposed permit and the department’s response to all comments on this determination shall be included in the record for the final permit. NR 111.12(1)(b)2.2. ‘Low capacity utilization power generating units.’ If an existing facility has a cooling water intake structure used for one or more existing electric generating units, each with an annual average capacity utilization rate of less than 8 percent averaged over a 24-month contiguous period, the department may, based on review of site-specific data concerning cooling water system data under s. NR 111.41 (4), establish the BTA standards for impingement mortality for that cooling water intake structure that are less stringent than par. (a) 1. to 7. NR 111.12(1)(c)(c) Reuse of other water for cooling purposes. The impingement mortality standard under this section does not apply to the portion of cooling water that is process water, gray water, reclaimed water, or other waters reused as cooling water in lieu of water obtained by surface water intakes.
