150414_IntGasIRP.pdf

Case No. INT-G-15-01, Order No. 33234
Contact: Gene Fadness [phone], 890-2712
www.puc.idaho.gov

PUC taking comments on Intermountain Gas long-range plan

BOISE (April 14, 2015) – The Idaho Public Utilities Commission is taking comment through May
4 on Intermountain Gas’ five-year plan to meet customer demand. The plan, called an
Integrated Resource Plan (IRP), must be filed every two years with the commission.

The company, which delivers natural gas to 290,500 residential customers and 31,000
commercial customers across southern Idaho, does not anticipate any peak-day delivery
deficits in the regions it serves over the next five years. Some customers, like those in the
Rexburg area, may require use of a portable liquefied natural gas facility to meet customer
demand on peak-use days. A number of industrial customers are able to use other non-
traditional sources on peak days, such as diesel/fuel oil, coal, wood chips and propane.

Intermountain Gas is the sole distributor of natural gas in southern Idaho, serving an area of
50,000 square miles and a population of 1 million. The company serves customers in 73
communities through a system of more than 100,000 miles of transmission, distribution and
service lines. More than 149 miles of distribution and service lines were added during 2013 to
accommodate new customer additions and maintain service.

The company is served by the Williams Northwest Pipeline that enters southeast Idaho from
Wyoming. From that pipeline, Intermountain has built several laterals, the major ones being
the Idaho Falls Lateral from Pocatello to St. Anthony, the Sun Valley lateral from Shoshone to
Sun Valley, the Canyon County Lateral, the State Street Lateral in northwest Boise and the
Central Ada Area Lateral.

The IRP forecasts a 2.32% rate of growth each year for the next five years in its total residential,
commercial and industrial peak-day loads. In 2013, the company experienced a 1.8% growth
rate in the number of residential and commercial customers from 2008.

The agricultural economy and the price of alternative fuels strongly influences industrial
demand for natural gas. In 2013, industrial sales and transportation customers accounted for
44% of the throughput on Intermountain’s system. Transportation customers are large
industrial customers that use Intermountain Gas’s distribution system to buy gas from
Intermountain or other suppliers.

The complete copy of Intermountain Gas’s IRP, along with exhibits, is available on the
commission’s Website at www.puc.idaho.gov. Click on “Open Cases,” under the “Natural Gas”
heading and scroll down to Case No. INT-G-15-01. To file comments in the case, click on “Case
Comment Form” under the “Consumers” heading and enter the above case number.

Comments can also be mailed to P.O. Box 83720, Boise, ID 83720-0074 or faxed to (208) 334-
3762.

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