Langley Gulch Power Plant

To responsibly plan for our energy future and ensure a supply of reliable, fair-priced electricity, Idaho Power is constructing the 300-megawatt Langley Gulch Power Plant and associated transmission lines.

This clean, highly-efficient natural gas-fired power plant will be built on a remote site in Payette County, Idaho. Construction began in June 2010 and the plant is scheduled for operation in June 2012.

View the Project Timeline (PDF).

Recently completed project activities include:

Construction of the pipeline and pump station that deliver water to the plant site, helping create energy
Construction of the pipeline that delivers natural gas to the plant site
Construction of the 230-kilovolt power line and substation that connect the plant to the Ontario-Caldwell line
Completion of nearly all of the plant’s underground piping and foundation work
Delivery of most of the major plant equipment

Current and upcoming project activities include:

Installation of the structural steel, above ground piping, electrical wiring and supporting buildings (ongoing)
Delivery of the steam turbine and associated generator (summer 2011)
Construction of the gas tap and metering station at the Williams Northwest connection (summer 2011)
Construction of the 138-kilovolt power line that connects the plant to Caldwell (fall 2011)
Plant cleaning, commissioning and startup (winter 2011/spring 2012)

The new power plant was identified in Idaho Power’s 2009 and 2011 Integrated Resource Plans (IRP) and is supported by the Idaho Public Utilities Commission (IPUC). The Langley Gulch Power Plant will

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become the newest resource in Idaho Power’s diverse generation portfolio when it begins operating in the summer of 2012.

In addition to providing electricity for Idaho Power’s customers, Langley Gulch will also help to integrate the large amount of wind and other renewable resources Idaho Power expects to have on its system in the near term.

The new plant will be able to increase or decrease generation quickly to respond to the variable and intermittent nature of renewable resources.

For additional details about the power plant, view the:

Neighborhood Newsletter, July 2011 (PDF)
Project Fact Sheet (PDF)
Langley Gulch FAQs (PDF)
Project Timeline (PDF)
Project Area Map (PDF)
Information Archive

Langley Gulch helps Idaho Power meet growing electricity demand, ensuring customers have the electricity they need to power comfortable lifestyles now and in the future.