Form 8-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): December 16, 2009


	Exact Name of Registrant as Specified in
	Charter; State of Incorporation;	IRS Employer
Commission File Number	Address and Telephone Number	Identification Number

1-8962	Pinnacle West Capital Corporation	86-0512431
	(an Arizona corporation) 400 North Fifth Street, P.O. Box 53999
	Phoenix, AZ 85072-3999
	(602) 250-1000

1-4473	Arizona Public Service Company	86-0011170
	(an Arizona corporation)
	400 North Fifth Street, P.O. Box 53999
	Phoenix, AZ 85072-3999
	(602) 250-1000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

This combined Form 8-K is separately filed by Pinnacle West Capital Corporation and Arizona Public Service Company. Each registrant is filing on its own behalf all of the information contained in this Form 8-K that relates to such registrant and, where required, its subsidiaries. Except as stated in the preceding sentence, neither registrant is filing any information that does not relate to such registrant, and therefore makes no representation as to any such information.

Item 8.01 Other Events

ACC Decision in APS General Retail Rate Case

On December 16, 2009, Arizona Public Service Company (“APS”) issued a press release related to the Arizona Corporation Commission’s decision in APS’ retail rate case, which is attached to this report as Exhibit 99.1. For additional information about the rate case, see “2008 General Retail Rate Case” in Note 5 of Notes to Condensed Consolidated Financial Statements in the Pinnacle West Capital Corporation (“Pinnacle West”)/APS Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009 and Item 8.01 of the Pinnacle West/APS Current Report on Form 8-K dated November 17, 2009.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits


Exhibit No.	Registrant(s)	Description
99.1	Pinnacle West APS	News Release issued on December 16, 2009.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

PINNACLE WEST CAPITAL CORPORATION
(Registrant)


Dated:	December 17, 2009	By:	/s/ James R. Hatfield

			James R. Hatfield Senior Vice President, Chief Financial Officer and Treasurer

ARIZONA PUBLIC SERVICE COMPANY
(Registrant)


Dated:	December 17, 2009	By:	/s/ James R. Hatfield

			James R. Hatfield Senior Vice President, Chief Financial Officer and Treasurer