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UNITED STATES DEPARTMENT OF LABOR

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Principal Minerals Mined Here!

Sand and Gravel	Helium	Coal
Soda Ash	What's Soda Ash?

Blimps are filled with Helium!

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U.S. Department of Labor | Mine Safety and Health Administration (MSHA) | 1100 Wilson Boulevard, 21st Floor | Arlington, VA 22209-3939
www.msha.gov | Telephone: (202) 693-9400 | Fax-on-demand: (202) 693-9401