Exhibit 31.01

CERTIFICATION

I, C. Riley Hill, certify that:

1. I have reviewed this report on Form 10-Q/A of Southwestern Public Service Company;

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: Nov. 8, 2013

/s/ C. RILEY HILL

C. Riley Hill

President, Chief Executive Officer and Director