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uoland sites for purposes other than mitioation. such as irrioation canals. detention facilities. wastewater treatment facilities. farm ponds. temporarv construction ponds. and landscape amenities. 17A.02.550 Nonconformitv. "Nonconformitv" means a leoally established existinq use or leqally constructed structure that is not in compliance with the current requlations. 17A.02.560 Ordinarv Hiqh Water Mark (OHWM). "Ordinarv hioh water mark (OHWM)" on all lakes.streams, and tidal water means that mark that will be found bv examininq the bed and banks and ascertaininq where the presence and action of waters are so common and usual. and so long continued in all ordinary years. as to mark upon the soil a character distinct from that of the abuttino upland. in respect to veoetation as that condition exists on June 1. 1971 . as it may naturally chanqe thereafter. or as it may chanqe thereafter in accordance with permits issued by a local qovernment or the Washinoton State Department of Ecoloqy; provided that in any area where the OHWM cannot be found, the OHWM adjoininq salt water shall be the line of mean hiqher hiqh tide and the OHWM adjoininq freshwater shall be the line of mean hioh water. 174.02.570 Permeabilitv. "Permeabilifu" means the capacitv of an aquifer or confininq bed to transmit water. lt is a propertv of the aquifer or confinino bed and is independent of the force causinq movement. 174.02.590 Priority Habitat. "Priority habitat" means a habitat qrpe or elements with unique or sionificant value to one or more species as classified by the state Department of Fish and Wildlife. A priority habitat may be described bv a unique veqetation type or bv a dominant plant species that is of primary importance to fish and wildlife (e.o.. oak woodlands, juniper savanna). A orioritv habitat mav also be described by a successional staoe (e.q.. old orowth and mature forests). Alternativelv. a prioritv habitat may consist of a specific habitat feature (e.q.. talus slopes. caves, snags) of kev value to fish and wildlife. 17A.02.600 Prioritv Species. "Priority species" means species requirino protective measures and/or management quidelines to ensure their persistence at qeneticallv viable population levels. Priority species include State Endanoered. Threatened. Sensitive. and Candidate species: animal aoqreoations (e.q.. heron colonies. bat colonies) considered vulnerable: and soecies of recreational. commercial. or tribal importance that are vulnerable. A species identified and maoped as prioritv species fit one or more of the followinq criteria: 1 . Criterion 1. State-Listed and Candidate Species: State-listed species are native fish and wildlife species leoally desiqnated as Endanqered (WAC 232-12-014). Threatened (WAC 232-12-011). or Sensitive (WAC 232-12-01 1). State Candidate species are fish and wildlife species that will be reviewed bv the department (POL-M-6001) for possible listino as Endanqered. Threatened. or Sensitive accordino to the process and criteria defined in W AC-232-1 2-297 . 2. Criterion 2. Vulnerable Aqqreqations: 28