Date of Notice: December 2, 2016

NOTICE OF CHANGE IN THE FIRM GAS TRANSPORTATION

AND INTERRUPTIBLE GAS TRANSPORTATION TARIFFS

OF PUBLIC SERVICE COMPANY OF COLORADO

1800 LARIMER STREET, DENVER, COLORADO 80202

You are hereby notified that Public Service Company of Colorado (“Company”) has filed with the Colorado Public Utilities Commission (“Commission”) changes in its Colorado P.U.C. No. 6 – GAS tariff to revise the Firm Gas Transportation Service – Small (Schedule TFS), Firm Gas Transportation – Large (Schedule TFL) and Interruptible Gas Transportation Service (Schedule TI) rate schedules to be effective January 1, 2017, unless suspended by the Commission. The Company makes this tariff filing pursuant to the tariff provisions contained on Sheet Nos. 29A, 30B, 31A and T3 of Company’s Colorado P.U.C No. 6 – GAS Tariff and in accordance with the Stipulation and Agreement in Resolution of Proceeding, Section H, approved by the Commission in Decision No. C06-0086, mailed February 3, 2006, in Proceeding No. 05S-264G.

These proposed tariff changes apply only to shippers and customers taking service under the Company’s Firm and Interruptible Gas Transportation Service, Schedules TFS, TFL and TI. The proposed revisions are to update the Fuel Reimbursement Percentage from 1.70 percent to 0.41 percent for these three rate schedules, to be effective on January 1, 2017.

Copies of the proposed and present tariffs summarized above, and as filed with the Commission, are available for examination and explanation at the Company’s main office, 1800 Larimer Street, Suite 1400, Denver, Colorado 80202; or at the Commission’s office, 1560 Broadway, Suite 250, Denver, Colorado, 80202.Customers who have questions may call the Commission at (303) 8942000, call Xcel Energy at 1-800-895-4999, fax the question to Xcel Energy at 1-800-895-2895, or email the question to .

Anyone who desires may file written comments or objections to this filing. If you wish only to object to the proposed action, you may file a written objection with the Commission. The filing of a written objection by itself will not allow you to participate as a party in any proceeding on the proposed action.

Anyone who desires to file written comments or objections to the proposed action shall file them with the Commission, 1560 Broadway, Suite 250, Denver, Colorado, 80202; or email the document to: at least ten (10) days before the proposed effective date of January 1, 2017.

If you wish to participate as a party in this matter, you must file written intervention documents in accordance with Rule 1401 of the Commissions Rules of Practice and Procedure or any applicable Commission order.

The rates, rules and regulations ultimately authorized may or may not be the same as those proposed and may include rates higher or lower than those proposed or currently in effect.

The Commission may hold a hearing to determine what rates, rules and regulations will be authorized. If a hearing is held, the Commission may suspend the proposed rates, rules or regulations.

Members of the public may attend any hearing and may make a statement under oath about the proposed revisions, regardless of whether they have filed a written objection or request to intervene. Anyone desiring information regarding if and when a hearing may be held shall submit a written request to the Commission or contact the External Affairs section of the Commission at its local number (303) 894-2070 or toll free number (800) 456-0858.

By:Scott B. Brockett

Director, Regulatory Administration