Description: Core Cold Water Habitat are waters expected to maintain temperatures within the range generally considered optimal for salmon and steelhead rearing, or that are suitable for bull trout migration, foraging and sub-adult rearing that occurs during the summer (OAR 340-041-0002 [13]). The biologically based temperature goal for waters designated as Core Cold Water Habitat is a seven-day Average Maximum temperature ≤16°C (~61°F). Waters designated as Core Cold Water Habitat have been mapped by DEQ.