Jerry Hoshaw: Irrigation System Upgrades

After learning about our Irrigation Efficiency Program, which provides cost share incentives to irrigation customers making energy efficient system upgrades, Hoshaw contacted an Idaho Power Agriculture Representative to do an energy consultation and provide expertise in irrigation design.

Hoshaw decided to make two improvements to his system to save energy, money and make his farm more manageable.

Existing System

Hoshaw’s existing system consisted of:

  • 45 acres of flood irrigated pasture
  • 43 acres of center pivot sprinkled pasture pressured by a 15 horsepower (hp) irrigation pump

What Changes Were Made?

The existing 43-acre portion of the system qualified as an existing system under the current Idaho Power incentive structure, eligible for $0.25 per kilowatt-hour (kWh) saved or $450 per kilowatt (kW) or up to 75 percent of total system cost.

  • Consultation results confirmed the existing pump horsepower (hp) could be reduced
  • The original 15 hp pump was replaced with a high efficiency 10 hp pump that pressured the pivot with 330 gallons per minute, 43 pounds per square inch (psi), with goosenecks, drops and 20 psi low pressure regulators

What Were the Results?

  • An estimated energy savings of 4,934 kWh and three kW per year
  • The total system cost was $2,049 with an Idaho Power incentive of $1,256 over 61 percent of the total project costs
  • Hoshaw will gain an estimated $347 in energy savings per year

New System Changes

The flood-irrigated portion of the project qualified as a new system under the current Idaho Power incentive structure, eligible for $0.25 per kWh saved or up to 10 percent of the total project cost.

  • 45 acres of flood irrigation was converted to 33 acres
  • A three-tower center pivot was installed operating at 260 gallons per minute, 35 psi, with goosenecks, drops and 20 psi low pressure regulators
  • A 10 hp high efficiency pump was installed

What Were the Results?

  • An estimated energy savings of 14,320 kWh per year and 7 kW, when compared to a standard system
  • The total system cost was $40,230 with an Idaho Power incentive of $3,580-which is nearly nine percent of the total system cost
  • Hoshaw will gain an estimated $885 in energy savings per year compared to a standard system