Oklahoma		73-1520922
(State or other jurisdiction of incorporation of organization)		(I.R.S. Employer Identification No.)

100 West Fifth Street, Tulsa, OK		74103
(Address of principal executive offices)		(Zip Code)

				Page No.
Part I.		Financial Information
Item 1.		Financial Statements (Unaudited)
		Consolidated Statements of Income—Three and Nine Months Ended September 30, 2002 and 2001		3
		Consolidated Balance Sheets—September 30, 2002 and December 31, 2001		4-5
		Consolidated Statements of Cash Flows—Nine Months Ended September 30, 2002 and 2001		6
		Notes to Consolidated Financial Statements		7
Item 2.		Management’s Discussion and Analysis of Financial Condition and Results of Operations		24
Item 3.		Quantitative and Qualitative Disclosures about Market Risk		44
Item 4.		Controls and Procedures		47
Part II.		Other Information
Item 1.		Legal Proceedings		47
Item 2.		Changes in Securities and Use of Proceeds		48
Item 3.		Defaults Upon Senior Securities		48
Item 4.		Submission of Matters to a Vote of Security Holders		48
Item 5.		Other Information		48
Item 6.		Exhibits and Reports on Form 8-K		48
Signatures
Certifications

		Three Months Ended September 30,								Nine Months Ended September 30,
(Unaudited)		2002				2001				2002				2001
		(Thousands of Dollars, except per share amounts)
Revenues
Operating revenues, excluding energy trading revenues		$	416,342			$	352,881			$	1,361,833			$	1,414,288
Energy trading revenues, net			49,051				27,085				186,836				93,541
Cost of sales			240,195				177,210				760,980				793,257
Net Revenues			225,198				202,756				787,689				714,572
Operating Expenses
Operations and maintenance			96,608				92,492				315,772				283,466
Depreciation, depletion, and amortization			44,732				39,322				129,944				114,133
General taxes			14,594				15,209				45,444				46,252
Total Operating Expenses			155,934				147,023				491,160				443,851
Operating Income			69,264				55,733				296,529				270,721
Other income, net			(7,012	)			(1,914	)			(2,601	)			1,951
Interest expense			28,991				34,731				83,026				108,515
Income taxes			12,542				301				82,202				54,752
Income before cumulative effect of a change in accounting principle			20,719				18,787				128,700				109,405
Cumulative effect of a change in accounting principle, net of tax (Note H)			—				—				—				(2,151	)
Net Income			20,719				18,787				128,700				107,254
Preferred stock dividends			9,275				9,275				27,825				27,825
Income Available for Common Stock		$	11,444			$	9,512			$	100,875			$	79,429
Earnings Per Share of Common Stock (Note D)
Basic		$	0.17			$	0.16			$	1.07			$	0.90
Diluted		$	0.17			$	0.16			$	1.06			$	0.90
Average Shares of Common Stock (Thousands)
Basic			99,957				99,521				99,852				99,382
Diluted			100,573				99,633				100,518				99,648
Dividends per share of Common Stock		$	0.16			$	0.16			$	0.47			$	0.47

(Unaudited)		September 30, 2002			December 31, 2001
Assets		(Thousands of Dollars)
Current Assets
Cash and cash equivalents		$	5,909		$	28,229
Trade accounts and notes receivable, net			487,998			677,796
Materials and supplies			17,651			20,310
Gas in storage			47,262			82,694
Unrecovered purchased gas costs			—			45,098
Assets from price risk management activities			833,693			587,740
Deposits			—			41,781
Other current assets			57,940			78,321
Total Current Assets			1,450,453			1,561,969
Property, Plant and Equipment
Marketing and Trading			124,489			122,172
Gathering and Processing			1,075,560			1,040,195
Transportation and Storage			706,512			691,976
Distribution			2,150,354			2,085,842
Production			512,748			482,404
Other			93,322			85,168
Total Property, Plant and Equipment			4,662,985			4,507,757
Accumulated depreciation, depletion, and amortization			1,335,946			1,234,789
Net Property, Plant and Equipment			3,327,039			3,272,968
Deferred Charges and Other Assets
Regulatory assets, net (Note B)			225,013			232,520
Goodwill			113,868			113,868
Assets from price risk management activities			386,546			475,066
Prepaid Pensions			136,991			116,847
Investments and other			53,926			105,921
Total Deferred Charges and Other Assets			916,344			1,044,222
Total Assets		$	5,693,836		$	5,879,159

(Unaudited)		September 30, 2002				December 31, 2001
Liabilities and Shareholders’ Equity		(Thousands of Dollars)
Current Liabilities
Current maturities of long-term debt		$	6,334			$	250,000
Notes payable			371,106				599,106
Accounts payable			362,869				390,479
Accrued taxes			33,130				11,528
Accrued interest			23,984				31,954
Unrecovered purchased gas costs			3,002				—
Customers’ deposits			20,615				21,697
Liabilities from price risk management activities			543,364				381,409
Deferred income taxes			82,369				3,327
Other			178,793				128,917