POWER OF ATTORNEY


KNOW ALL PERSONS BY THIS DOCUMENT:  That I, Richard H. Bachmann, have made,
constituted, and appointed, and by this document do make, constitute, and
appoint Stephanie C. Hildebrandt, Christopher S. Wade, and Wendi S. Bickett, of
the County of Harris, State of Texas, whose signatures are:



/s/Stephanie C. Hildebrandt
Stephanie C. Hildebrandt, Attorney-in-Fact


/s/Christopher S. Wade
Christopher S. Wade, Attorney-in-Fact


/s/Wendi S. Bickett
Wendi S. Bickett, Attorney-in-Fact

or any of them, signing singly, my true and lawful attorney-in-fact, and in my
name, place, and stead to:

1.	Execute, deliver and file on behalf of the undersigned, in the undersigned's
capacity as an officer and officer of DEP Holdings, LLC, the sole general
partner of Duncan Energy Partners L.P. (the "Company"), any U.S. Securities and
Exchange Commission Form 3, 4 and 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934 and the rules thereunder with respect to
holdings of or trading in securities issued by the Company;

2.	Do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete and execute any such Form 3, 4 or 5
and timely file such form or any amendment thereto with the United States
Securities and Exchange Commission and any stock exchange or similar authority;
and

3.	Take any other action of any type whatsoever in connection with or in
furtherance of the matters described in paragraphs 1 and 2 above which in the
opinion of its attorney-in-fact may be of benefit to, and in the best interest
of, or legally required by, the undersigned.

Giving and granting to each such attorney-in-fact full power and authority to do
and perform every act necessary and proper to be done in the exercise of the
foregoing powers as fully as I might or could do if personally present, with
full power of substitution and revocation, hereby ratifying and confirming all
that such attorney-in-fact, or such attorney-in-fact's substitutes, shall
lawfully do or cause to be done by virtue of this power of attorney and the
rights and powers herein granted.  The undersigned acknowledges that each
attorney-in-fact, in serving in such capacity at the request of the undersigned,
is not assuming, nor is the Company assuming, any of the undersigned's
responsibilities to comply with Section 16 of the Securities Exchange Act of
1934.

This Power of Attorney shall remain in effect until the undersigned is no longer
required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of
and transactions in securities issued by the Company, unless revoked by the
undersigned in a signed writing delivered to each of the foregoing
attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 24th day of August, 2009.


								/s/ Richard H. Bachmann
	RICHARD H. BACHMANN