 None of the calculations could reveal a positive return to the US national treasury from the timber harvest of the Tongass National Forest.Many companies entered into timber contracts in Southeast Alaska during the post-World War II boom, however only two contracts remained by the time the TTRA was passed.In 1951 the United States federal government signed a contract with the Ketchikan Pulp Company (KPC) to authorize the harvest of 8.25 billion board feet of timber within a 50-year period from the Tongass National Forest.