On June 29, 1936, President Franklin D. Roosevelt signed legislation (Public Law 840, H.R. 7736) that established Whitman Mission at Waiilatpu as a unit of the National Park Service (NPS). The act stated the following:
(Information excerpted from Whitman Mission NHS General Management Plan, 2000)
Did You Know?
The mission at Waiilatpu had a sawmill supplying it with needed cut lumber. It was located in the Mill Creek drainage. Lumber was needed for the split rail fences and finishing the houses built at the mission.