Calvin Graybeal: New Irrigation System

Calvin Graybeal and his son, Don Graybeal, of Castleford, Idaho, manage 168 acres of flood-irrigated land.

To make the land more efficient and more easily managed, the Graybeals realized their system needed to be improved.

They heard about Idaho Power’s Irrigation Efficiency Rewards program and contacted their local Idaho Power Agriculture Representative.

Working together using the agriculture rep’s knowledge and expertise, the Graybeals installed a new irrigation system that reduces labor, is easily managed and increases performance of their land.

Existing System

Flood irrigation for 168 acres supplied by an open-discharge deep well.

What Changes Were Made?

The new, energy-efficient gravity flood irrigation system qualified as a new system under the current Idaho Power Irrigation Efficiency Rewards program incentive structure. The new system was eligible for $0.25 per kilowatt-hour (kWh) saved, or up to 10 percent of the total project cost. The new, energy-efficient system included:

  • A 1,461-foot hydraulic pivot with elbows, drops, low-pressure regulators, and sprinkler heads
  • A 15-horsepower (hp) hydraulic pump to operate the pivot
  • A 40-hp pump to provide 915 gallons of water per minute (gpm) and supply 50 pounds of water pressure per square inch (psi)

What Were the Results?

  • An estimated 10.9 kilowatt demand reduction and 21,773-kWh energy savings per year when compared to a standard system
  • An Idaho Power incentive that paid for 6.3 percent of the total project
  • A potential reduction in labor costs
  • A potential crop yield increase