Screening Technology for Agriculture, Hatcheries, and Hydro

Farmers Screen™

FARMERS SCREEN™

We design and build fish screens for irrigation and hydropower.

The Farmers Screen™ is an innovative, horizontal fish screen technology that allows farmers to divert water from rivers without harming fish or trapping debris. Invented by farmers in the Hood River basin, and sold by FCA, the Farmers Screen has been installed throughout the western United States. FCA works with farmers, engineers, and agencies to support the design and installation of the Farmers Screen.

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Features of the Farmers Screen™
  • NMFS Approved
    Meets National Marine Fisheries Service criteria
  • Any flow rate
    Screens from 1 to 1000s of CFS
  • LOW head loss
    Minimal Elevation Needed to Operate
  • low O&M rate
    No power needed and minimal cleaning required
  • no moving parts
    Reduces maintenance needs
  • fish safe
    Verified by 8 independent studies
HOW IT WORKS

How the Farmers Screen™ works.

The Farmers Screen™ is a horizontal, passive fish screen design that uses hydraulics to manage debris and protect fish. It has no moving parts and does not require power to operate. The Farmers Screen is a patented technology licensed solely to FCA.

1Diversion Structure

A structure that directs flow from the river or stream into the diversion. This can be a dam, rock weir, or stem wall.

2Head Gate

An adjustable structure that controls the flow of water entering the diversion.

3Inlet Flume

The channel that carries water diverted from the river or stream into the screen structure.

4Screen Structure

Fish, debris and water pass above the horizontal screening material and return to the river.

5By-Pass Return

Water, fish, and debris are returned to the original source. This can be a step pool, roughened channel, or pipe.

6Conveyance

Screened water is conveyed to its intended users
(e.g., irrigators) via pipe or canal.

1Inlet Flume

Attached to the upstream end of the screen, the Inlet Flume creates optimal hydraulic conditions by allowing water entering the Farmers Screen™ to achieve a uniform, steady state flow.

2Horizontal Screen

A perforated, stainless steel flat plate lies parallel to the water surface. Low downward velocity pushes water through the horizontal screen material.

3Sweeping Velocity

Water sweeps over the screen surface at a velocity at least 20 times greater than the velocity of the water passing downward through the screen. This allows fish and debris to be swept over the horizontal screen material and returned to the stream while screened water can be collected and carried to irrigators via pressurized pipe.

4Taper Wall

Maintains constant velocities and uniform depth of water over the screen surface as water progresses through the structure. The taper wall decreases the cross sectional area of the flume as water is delivered through the screen.

5Weir Wall

A short, solid steel panel that runs parallel to the taper wall, the weir wall maintains a uniform depth of water over the screen and thus uniform flow through the screen.

1Inlet Flume

Attached to the upstream end of the screen, the Inlet Flume creates optimal hydraulic conditions by allowing water entering the Farmers Screen™ to achieve a uniform, steady state flow.

2Horizontal Screen

A perforated, stainless steel flat plate lies parallel to the water surface. Low downward velocity pushes water through the horizontal screen material.

3Sweeping Velocity

Water sweeps over the screen surface at a velocity at least 20 times greater than the velocity of the water passing downward through the screen. This allows fish and debris to be swept over the horizontal screen material and returned to the stream while screened water can be collected and carried to irrigators via pressurized pipe.

4Taper Wall

Maintains constant velocities and uniform depth of water over the screen surface as water progresses through the structure. The taper wall decreases the cross sectional area of the flume as water is delivered through the screen.

5Weir Wall

A short, solid steel panel that runs parallel to the taper wall, the weir wall maintains a uniform depth of water over the screen and thus uniform flow through the screen.

Large Fish Screens

Our largest Farmers Screen is now operational on Nevada’s Truckee River.

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PROJECTS

Farmers Screens across the West.

Take a tour of some of the 50 Farmers Screens we’ve installed across the west.

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222.3
River miles opened since the first screen install
$484,200
Dollars saved by farmers annually

FCA works with landowners, engineers, agencies, and nonprofits to install Farmers Screens™ throughout the United States.

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