The Energy Information Administration (EIA) reported that underground natural gas storage capacity in the Lower 48 states was relatively unchanged in 2019, compared to 2018. According to the report, demonstrated peak capacity rose 0.1% over the period, while design capacity decreased 0.4%. EIA noted that no new storage facilities were completed over the last six years.
Demonstrated peak capacity reflects the actual utilization of storage facilities. It is calculated as the total of monthly highest storage levels achieved by each storage field over the last five years. The current demonstrated peak capacity covers a period from December 2014 to November 2019. Last year, it rose 3 Bcf, or 0.1% year-on-year.
Design capacity indicates how storage facilities were designed. It is calculated based on the physical characteristics of the reservoir, operating procedures on the site, and installed equipment for all active facilities in the Lower 48 states. As of November 2019, design capacity of natural gas storage in the US decreased by 19 Bcf or 0.4% year-on-year.
