EXHIBIT 31.1(a)
CERTIFICATION
I, Gregg S. Kantor, certify that:
| 1. | I have reviewed this annual report on Form 10-K/A of Northwest Natural Gas Company; and |
| 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. |
Date: March 6, 2009
/s/ Gregg S. Kantor |
Gregg S. Kantor |
| President and Chief Executive Officer |
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