Domestic production of natural gas in the United States and Canada has declined approximately five trillion cubic feet during the past decade (Fig. 1 In the future, the rate of decline is expected to continue, but may be offset to some extent by new production from unconventional sources. Wyoming's natural gas production has fluctuated over the past decade, but is expected to increase substantially during the 1980's due to new discoveries of large reservoirs in the Overthrust Belt, Wind River and Green River basins (Fig. 2 ).