[ESU code]_hab1 - These data describe the freshwater and estuarine primary constituent elements (PCEs) or habitat areas identified in the agency's final rule to designate critical habitat for 12 ESUs of Pacific salmon and steelhead. The data depict spawning, rearing, and migration PCEs. As well as areas that are unoccupied but essential for conservation, areas unoccupied but maybe essential for conservation, and areas occupied but lacking PCEs. Occupied areas were identified based on observation or the professional judgment of biologists familiar with the watershed. Additional information can be found in the agency's biological assessment supporting the rule.