POWER OF ATTORNEY

	The undersigned appoints the following individuals with full power to each of
them to act alone, as his true and lawful attorneys-in-fact and agents to
execute and file on behalf of the undersigned (i) a Form ID, and any amendments
thereto; and (ii) all Forms 3, 4 and 5, and any amendments thereto, that the
undersigned may be required to file with the Securities and Exchange Commission,
and any stock exchange or similar authority, as a result of the undersigned's
ownership of or transactions in securities of Arch Coal, Inc.  The authority of
the following individuals under this Power of Attorney shall continue until the
undersigned is no longer required to file Forms 3, 4 and 5 with regard to the
undersigned's ownership of or transactions in securities of Arch Coal, Inc.,
unless earlier revoked in writing.  The undersigned acknowledges that the
following individuals are not assuming any of the undersigned's responsibilities
to comply with Section 16 of the Securities Exchange Act of 1934.
	The following Officers of Arch Coal, Inc.:

		Secretary of Arch Coal, Inc.

		Assistant Secretary of Arch Coal, Inc.

		General Counsel of Arch Coal, Inc.

	IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 6th day of September, 2016.



/s/ James N. Chapman