About Us

Owyhee Irrigation District

The Owyhee Irrigation District is a quasi-government organization, that lies west of the Snake River in Malheur County, Oregon, whose primary purpose is to supply irrigation water to over 167,000 acres of land in eastern Oregon including Adrian, Nyssa, and Ontario, Oregon. The key features of the project are the Owyhee Dam, the Dunaway Pumping Station on the Snake River about 11 miles southwest of Adrian, Oregon, and the Dead Ox Pumping Station outside of Ontario, Oregon heading towards Weiser, Idaho, both of which act as a diversion structure. Project works also include over 5 miles of canals, pipelines, laterals and drains. 2 pumping plants, and 3 hydro-electric facilities. In 2008 the valley celebrated the 75th anniversary of the dedication of the Owyhee Dam.


In 1925, after studying various reports and plans made by the Government engineers, State cooperative boards and private companies, after conducting further investigation of their own, the Bureau issued a feasibility report recommending construction of the Owyhee Project. Work began on the storage dam and canal system in 1928, and the first water was delivered to the project lands in 1935. The Owyhee Project was designed to supply water to the entire project area by gravity flow from Owyhee Reservoir. But, because the Owyhee River's flow is frequently too low to supply the necessary water, privately-constructed pumping plants provide Snake River water to lower-lying project lands. These plants are operated under a 1936 contract between the Bureau of Reclamation and several irrigation districts. The completed Owyhee Project lies west of the Snake River in Malheur County, Oregon, and Owyhee County, Idaho. The project provides a full irrigation water supply to 105,249 acres, and a supplemental supply to 13,000 acres. Of the 118,249 acres total, 71% is in Oregon, the remainder in Idaho. The project encompasses 1,831 farm units and 8 towns.

For more information please visit: