| CERTIFICATION                                    |
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| I,                JAMES H. MILLER, certify that: |
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| 1.                                               | I                have reviewed                this quarterly report on Form 10-Q of PPL                Energy Supply, LLC (the "registrant"); |
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| 2.                                               | Based                on my knowledge, this report does not contain any untrue statement                of a                material fact or omit to state a material fact necessary                to                make the statements made, in light of the circumstances under which                such                statements were made, not misleading with respect to the period covered                by                this report; |
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| 3.                                               | Based                on my knowledge, the financial statements, and other financial information                included in this report, fairly present in all material                respects the financial condition, results of operations and cash                flows of                the registrant as of, and for, the periods presented in this report; |
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| 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: |
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|                                             | 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 period in which this report is                being                prepared; |
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|                                             | b. | Evaluated                the effectiveness of the registrant's disclosure controls and procedures                and presented in this report our conclusions about the effectiveness                of                the disclosure controls and procedures, as of the end of the period                covered by this report based on such evaluation; and |
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|                                             | c. | Disclosed                in this 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 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 |
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| 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):  |
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|                                             | 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 |
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|                                             | 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. |
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| Date:                May 3, 2007                 | /s/  James                H.                Miller                                         |
|                                             | James                H. MillerPresidentPPL                Energy Supply, LLC |