 Between 1954 and 1990 approximately 70% of the productive old-growth had been harvested.Prior to the enactment of the TTRA, clear cut logging of old-growth still took place in the Tongass National Forest, the only forest in the US where this method of forest management still existed.Continuation of similar rates of deforestation would have led to a large reduction in suitable habitat of the Sitka black-tailed deer, an important resource for subsistence hunting.