Rancher protects watershed Three Springs Ranch is home to 150 head of cattle, but owner Ray Thompson dedicates most of his property to protecting the quality of Tulsa's drinking water. Land Legacy, a nonprofit land conservation organization, has launched the Spavinaw Watershed Protection Initiative, which encourages land owners to preserve a portion of their properties. Spavinaw Creek feeds into Spavinaw Lake and Eucha Lake, which is Tulsa's water source. Tulsa and its suburban water customers represent about a fourth of the state's population. Thompson's ranch is the first easement purchased through a partnership with Land Legacy, the city of Tulsa and the Environmental Protection Agency....