Power of Attorney

 Know all by these presents, that the undersigned
hereby constitutes and appoints each of
Elisabeth A. Eden, Angela Pino, Donna Briggs, or
any of them signing singly, to serve as my true
and lawful attorney-in-fact to:

 (1)	execute for me in my capacity as a
Director and/or an Officer of PNM Resources, Inc.
(?Company?), Forms 3, 4, and 5 in accordance with
Section 16(a) of the Securities Exchange Act of
1934 (?1934 Act?) and the associated rules;

 (2)	do and perform for me all acts which may
be necessary or desirable to complete and execute
Forms 3, 4, and 5, complete and execute any
amendments, and timely file the forms with the
Untied States Securities and Exchange Commission
and the New York Stock Exchange, or similar
authority; or

 (3)	take any other action of any type
whatsoever in connection with the foregoing
which, in the opinion of such attorney-in-fact,
may be of benefit to, in the best interest of, or
legally required by, the undersigned, it being
understood that the documents executed by such
attorney-in-fact on behalf of the undersigned
pursuant to this Power of Attorney shall be in
such form and shall contain such terms and
conditions as such attorney-in-fact may approve
in such attorney-in-fact's discretion.

 The undersigned hereby grants to each such
attorney-in-fact full power and authority to do
and perform any and every act and thing
whatsoever requisite, necessary, or proper to be
done in the exercise of any of the rights and
powers herein granted, as fully to all intents
and purposes as the undersigned might or could do
if personally present, with full power of
substitution or revocation, hereby ratifying and
confirming all that such attorney-in-fact, or his
or her substitute or substitutes, shall lawfully
do or cause to be done by virtue of this Power of
Attorney and the rights and powers herein
granted.

 I acknowledge that the attorneys-in-fact are
serving at my request and neither they nor the
Company are assuming any of my responsibilities
to comply with Section 16 of the 1934 Act.  This
Power of Attorney shall remain in full force and
effect until I am no longer required to file
Forms 3, 4, and 5 with respect to my holdings of
and transactions in securities issued by the
Company, unless earlier revoked by me in a signed
writing delivered to the Company.
/s/ Henry E. Monroy
Henry E. Monroy
Dated:  January 30, 2020