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(27) (27) “MGD” means millions of gallons per day.

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 Note Note: 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(30) (30) “Moribund” means dying or close to death.

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(32) (32) “New facility” means a facility determined to be a new facility under s. NR 111.02 (3).

NR 111.03 Note Note: 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 Note Note: 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)(a) (a) It is located 800 feet or more from the shoreline.

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 Note Note: 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.