**Exhibit 31.2**     I, Richard W. FitzGerald, certify that:     1. I have reviewed this annual report on    Form 10-K    of Eagle Rock Energy Partners, L.P.;     2. Based on my knowledge, this annual report does not    contain any untrue statement of a material fact or omit to state    a material fact necessary in order to make the statements made,    in light of the circumstances under which such statements were    made, not misleading with respect to the year covered by this    annual report;     3. Based on my knowledge, the financial statements, and    other financial information included in this annual report,    fairly present in all material respects the financial condition,    results of operations and cash flows of the registrant as of,    and for, the years presented in this annual report;     4. The registrant’s other certifying officer and I are    responsible for establishing and maintaining disclosure controls    and procedures (as defined in Exchange Act    Rules 13a-15(e)    and    15d-15(e))    for the registrant and have:     a. designed such disclosure controls and procedures, or    caused such disclosure controls and procedures to be designed    under our supervision, to ensure that material information    relating to the registrant, including its consolidated    subsidiaries, is made known to us by others within those    entities, particularly during the year in which this annual    report is being prepared;     b. evaluated the effectiveness of the registrant’s    disclosure controls and procedures and presented in this annual    report our conclusions about the effectiveness of the disclosure    controls and procedures, as of the end of the year covered by    this annual report; and     c. disclosed in this annual report any change in the    registrant’s internal control over financial reporting that    occurred during the registrant’s most recent fiscal quarter    (the registrant’s fourth fiscal quarter in the case of an    annual report) that has materially affected, or is reasonably    likely to materially affect, the registrant’s internal    control over financial reporting; and     5. The registrant’s other certifying officer and I    have disclosed, based on our most recent evaluation of internal    control over financial reporting, to the registrant’s    auditors and the audit committee of the registrant’s board    of directors (or persons performing the equivalent functions):     a. all significant deficiencies and material weaknesses in    the design or operation of internal control over financial    reporting which are reasonably likely to adversely affect the    registrant’s ability to record, process, summarize and    report financial information; and     b. any fraud, whether or not material, that involves    management or other employees who have a significant role in the    registrant’s internal control over financial reporting. /s/  Richard    W. FitzGerald    Richard W. FitzGerald    Senior Vice President, Chief Financial Officer and Treasurer of    Eagle Rock Energy G&P, LLC, General Partner of Eagle Rock    Energy GP, L.P., General Partner of Eagle Rock Energy Partners,    L.P.     Date: April 2, 2007