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Farmers Irrigation District Hydroelectric Projects – are located on tributaries and the main stem of the Hood River near the Columbia River Gorge about 60 miles west of Portland, Oregon. The Projects including penstocks and powerhouses, were constructed in the mid-1980s to produce renewable energy for the Bonneville Power grid and provide revenue to the District to be used for water conservation, stream restoration, and fish screen projects. The project consists of two powerhouses. The upper powerhouse contains a 1.8 MW generator with a horizontal axis Pelton turbine; the lower powerhouse contains two generators – 1.0 MW and 2.0 MW – driven by horizontal axis Francis turbines. Each plant has its own switchgear, and electricity flows from both plants to a single substation, which is connected directly to the Bonneville grid.

Project Name Farmers Irrigation District
LIHI Certificate Number 45
LIHI Effective and
Expiration Dates
March 25, 2014
March 25, 2019
Owner Farmers Irrigation District
State Oregon
Location Located on tributaries and the main stem of the Hood River near the Columbia River Gorge, about 60 miles west of Portland, Oregon.
Installed Capacity 4.8 MW
Average Annual Generation 22,000 MWh
Facility Type Run-of-river
FERC No. 7532, 6801

The projects are run-of-river, and no dams are associated with the project’s six water diversion systems. Water flows to the upper powerhouse forebay through the 10-mile long Lowline canal and pipe system; water to the lower plant forebay flows through the 5-mile long Farmers canal and pipe system. The project has no reservoir storage other than the forebay, canal, and pipe systems. A 5-mile long, 36-inch diameter penstock provides water to the upper turbine, and a 2-mile long, 48-inch diameter penstock conveys water to the lower turbines. Water from the upper plant also flows through the lower plant. Farmers Irrigation District owns the project facilities and holds easements for the canals, pipes, forebays, penstocks, and transmission lines.

The District diverts its project water through self-cleaning, horizontal fish screens, a technology developed by the District that allows fish to pass through the diversion systems without harm. The District maintains year-round minimum flows in Green Point Creek, a premier anadromous fish-bearing stream that is one of the sources of water for the upper plant. The upper plant is operated at reduced capacity if Green Point Creek flow drops below the minimum, and the plant typically does not run at all during the summer months. In the 1990s, the Hood River was listed for Threatened salmon and steelhead, and the Hood River was also placed on the 303d list for water temperature. In the response to these listings, in a concerted effort to ensure that the District’s power plants are low impact, the District is presently working with the Oregon Department of Fish and Wildlife, Oregon Department of Environmental Quality, and the Confederated Tribes of Warm Springs to alter plant operation to enhance Hood River mainstem in-stream flow during the summer months and ensure that the District’s project does not increase water temperature.

Certification History

April 22, 2014: The Farmer’s Irrigation District Hydroelectric Projects have been certified for a second five year term, effective March 25, 2014 and expiring March 25, 2019.

January 27, 2014: The Low Impact Hydropower Institute has received an application from Farmers Irrigation District for a second term of certification. The application materials are available in the “Files” section below.

November 20, 2009: The Farmers Irrigation District Project has been certified as low impact for a five year term, effective March 25, 2009 and expiring March 25, 2014.

March 25, 2009: The Farmers Irrigation District has submitted an application for certification of its small-scale hydroelectric project. A public comment period will remain open for 60 days, ending on May 25, 2009.


Files: