Exhibit 99.1

              Eagle Rock Energy Partners, L.P. Announces
            Issuance of Additional 1,463,785 Common Units


    HOUSTON--(BUSINESS WIRE)--Nov. 21, 2006--Eagle Rock Energy
Partners, L.P. (Nasdaq:EROC) today announced that the underwriters of
Eagle Rock Energy's recent initial public offering have partially
exercised their option to purchase an additional 1,463,785 common
units. This issuance is part of Eagle Rock Energy's initial public
offering that was priced on October 24, 2006, at a price of $19.00 per
common unit. The net proceeds from the exercise of the underwriters'
option were used to redeem an equal number of common units from
certain owners as described in the final prospectus.

    A copy of the final prospectus relating to this offering may be
obtained from UBS Investment Bank, 299 Park Avenue, 29th floor, New
York, NY 10171, Attn: Prospectus Department, Phone: 212-713-8802,
Lehman Brothers Inc., c/o ADP Financial Services, Integrated
Distribution Services, 1155 Long Island Avenue, Edgewood, NY 11717,
Goldman, Sachs & Co., 85 Broad Street, New York, NY 10004, or from any
of the other underwriters. Any direct requests to Lehman Brothers
should be to the attention of Monica Castillo, monica_castillo@adp.com
or by fax at 631-254-7268, and any direct requests to Goldman, Sachs
should be to prospectus-ny@ny.email.gs.com or by fax at 212-902-9316.

    Eagle Rock Energy Partners, L.P. is a growth-oriented midstream
energy partnership engaged in the business of gathering, compressing,
treating, processing, transporting and selling natural gas and
fractionating and transporting natural gas liquids in Texas and
Louisiana. Its corporate office is located in Houston, Texas.

    This press release shall not constitute an offer to sell or the
solicitation of an offer to buy these units nor shall there be any
sale of these securities in any state or jurisdiction in which such an
offer, solicitation or sale would be unlawful prior to registration or
qualification under the securities of such jurisdiction. The offering
may only be made by means of a prospectus.

    This press release may include "forward-looking statements" as
defined by the Securities and Exchange Commission. All statements,
other than statements of historical facts, included in this press
release that address activities, events or developments that the
partnership expects, believes or anticipates will or may occur in the
future are forward-looking statements. These statements are based on
certain assumptions made by the partnership based on its experience
and perception of historical trends, current conditions, expected
future developments and other factors it believes are appropriate
under the circumstances. Such statements are subject to a number of
assumptions, risks and uncertainties, many of which are beyond the
control of the partnership, which may cause the partnership's actual
results to differ materially from those implied or expressed by the
forward-looking statements.

    CONTACT: Eagle Rock Energy Partners, L.P., Houston
             Alfredo Garcia, 832-327-8003
             Investor Relations
             or
             Richard FitzGerald, 832-327-2058
             Investor Relations