Intermountain Gas expands LNG storage to meet an exaggerated peak load problem

Intermountain Gas Co., Boise, Idaho, uses LNG to solve its excessive winter peak load caused by a seasonal industrial demand and a heavy heating requirement. Having a year-round contract demand of 163 million SCF/day from Northwest Pipeline Col., Intermountain Gas must store excess gas as LNG in summer and draw from 3 storage systems for the winter peakshaving days: the Jackson Prairie storage area; Northwest's LNG plant now under construction in Plymouth, Wash.; and International's own recently completed LNG plant near Boise. The company's plant has a tank capacity of 600 million SCF. At a liquefaction rate of 4 million SCF/day, the tank can be filled in about 150 days.