Projects that further reduce irrigation withdrawals from the mainstem and South Fork of Cowiche Creek and result in permanent and quantifiable increases of stream flow. Irrigation diversions significantly reduce summer and falls flows in the lower 12 miles of the Cowiche Creek system. Irrigation system improvements that increase water use efficiencies, cooperative agreements with irrigators, and leases and purchase of water rights can all be used to reduce diversions. Much of the land irrigated from Cowiche Creek could potentially be served by the Yakima Tieton Irrigation District, and the possibility for agreements that provide irrigators with Yakima-Tieton water in exchange for leaving surface flows in Cowiche Creek should continue to be pursued.