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<br /> <br />28 <br /> <br />upland sites for purposes other than mitigation, such as irrigation canals, detention facilities, <br />wastewater treatment facilities, farm ponds, temporary construction ponds, and landscape <br />amenities. <br />17A.02.550 Nonconformity. <br />“Nonconformity” means a legally established existing use or legally constructed structure that is not <br />in compliance with the current regulations. <br />17A.02.560 Ordinary High Water Mark (OHWM). <br />"Ordinary high water mark (OHWM)" on all lakes, streams, and tidal water means that mark that will <br />be found by examining the bed and banks and ascertaining where the presence and action of waters <br />are so common and usual, and so long continued in all ordinary years, as to mark upon the soil a <br />character distinct from that of the abutting upland, in respect to vegetation as that condition exists on <br />June 1, 1971, as it may naturally change thereafter, or as it may change thereafter in accordance <br />with permits issued by a local government or the Washington State Department of Ecology; provided <br />that in any area where the OHWM cannot be found, the OHWM adjoining salt water shall be the line <br />of mean higher high tide and the OHWM adjoining freshwater shall be the line of mean high water. <br />17A.02.570 Permeability. <br />“Permeability” means the capacity of an aquifer or confining bed to transmit water. It is a property of <br />the aquifer or confining bed and is independent of the force causing movement. <br />17A.02.590 Priority Habitat. <br />“Priority habitat” means a habitat type or elements with unique or significant value to one or more <br />species as classified by the state Department of Fish and Wildlife. A priority habitat may be <br />described by a unique vegetation type or by a dominant plant species that is of primary importance <br />to fish and wildlife (e.g., oak woodlands, juniper savanna). A priority habitat may also be described <br />by a successional stage (e.g., old growth and mature forests). Alternatively, a priority habitat may <br />consist of a specific habitat feature (e.g., talus slopes, caves, snags) of key value to fish and wildlife. <br /> <br />17A.02.600 Priority Species. <br />"Priority species" means species requiring protective measures and/or management guidelines to <br />ensure their persistence at genetically viable population levels. Priority species include State <br />Endangered, Threatened, Sensitive, and Candidate species; animal aggregations (e.g., heron <br />colonies, bat colonies) considered vulnerable; and species of recreational, commercial, or tribal <br />importance that are vulnerable. A species identified and mapped as priority species fit one or more <br />of the following criteria: <br />1. Criterion 1. State-Listed and Candidate Species: <br />State-listed species are native fish and wildlife species legally designated as Endangered (WAC <br />232-12-014), Threatened (WAC 232-12-011), or Sensitive (WAC 232-12-011). State Candidate <br />species are fish and wildlife species that will be reviewed by the department (POL-M-6001) for <br />possible listing as Endangered, Threatened, or Sensitive according to the process and criteria <br />defined in WAC-232-12-297. <br />2. Criterion 2. Vulnerable Aggregations: