This publication contains analyses and related source data for 160 natural gas samples from 16 states. Of the total samples, 149 were collected during calendar years 1994-95.
This publication contains analyses and related source data for 167 natural gas samples from 17 states. Of the total samples, 89 were collected during calendar years 1996-97.
This report differs from past reports in defining helium reserves in that it includes only the estimated helium contained in fields and formations from which helium is currently being recovered.
Technical Note 412 contains analyses and related source data for 311 natural gas samples from 13 States. Of the total samples, 309 were collected during calendar years 1998 through 2001.
This report deviates from previous reports in defining helium reserves. It includes only the estimated helium contained in fields and formations from which helium is currently being recovered.
Technical Note 418 contains analyses and related source data for 451 natural gas samples from 15 States. Of the total samples, 381 were collected during calendar years 2002 through 2004.
In the last 10 years, the Bureau of Land Management (BLM) has reclaimed a number of abandoned mine land (AML) sites, often by removing mine, mill, and smelter wastes and taking them to a repository
Technical Note 427 contains analyses and related source data for 361 natural gas samples from 11 States. Of the total samples, 231 were collected during calendar years 2005 through 2007.
Technical Note 429, Helium Resources of the United States—2007, is an assessment of the total estimated helium reserves and resources of the United States.
