Williams Partners 8-K/A Results of Operations and Financial Condition

Exhibit 99.1

Segment Profit & Operating Statistics

(UNAUDITED)

	2006*														2007*
(Thousands)	1st Qtr			2nd Qtr		3rd Qtr			4th Qtr			Y-T-D			1st Qtr			2nd Qtr			3rd Qtr			4th Qtr			Y-T-D
Gathering and Processing — West
Segment revenues	$	115,672		$	127,794	$	132,603		$	126,244		$	502,313		$	120,428		$	125,047		$	134,035		$	134,277		$	513,787
Product cost and shrink replacement		38,277			41,800		41,821			38,099			159,997			39,675			42,313			45,791			42,655			170,434
Operating and maintenance expense		29,095			34,525		29,950			31,193			124,763			33,097			29,487			34,267			38,931			135,782
Depreciation, amortization and accretion		9,814			9,952		10,035			10,254			40,055			12,175			10,203			8,564			10,581			41,523
Direct general and administrative expenses		3,400			2,361		2,838			3,321			11,920			1,821			1,797			1,839			2,333			7,790
Other, net		(1,567	)		1,919		2,260			3,157			5,769			2,384			2,624			2,414			3,145			10,567
Segment operating income		36,653			37,237		45,699			40,220			159,809			31,276			38,623			41,160			36,632			147,691
Equity earnings		9,341			18,268		20,952			13,129			61,690			11,328			20,558			18,472			25,854			76,212
Segment profit	$	45,994		$	55,505	$	66,651		$	53,349		$	221,499		$	42,604		$	59,181		$	59,632		$	62,486		$	223,903
Gathering and Processing — Gulf
Segment revenues	$	733		$	676	$	632		$	615		$	2,656		$	561		$	459		$	521		$	578		$	2,119
Operating and maintenance expense		242			231		399			788			1,660			550			361			443			521			1,875
Depreciation and accretion		300			300		300			300			1,200			304			303			304			338			1,249
Direct general and administrative expenses		2			7		—			(8	)		1			—			—			—			—			—
Other, net		—			—		—			—			—			—			—			—			10,406			10,406
Segment operating income (loss)		189			138		(67	)		(465	)		(205	)		(293	)		(205	)		(226	)		(10,687	)		(11,411	)
Equity earnings		5,671			3,521		6,083			2,775			18,050			3,931			3,875			7,902			13,134			28,842
Segment profit	$	5,860		$	3,659	$	6,016		$	2,310		$	17,845		$	3,638		$	3,670		$	7,676		$	2,447		$	17,431
NGL Services
Segment revenues	$	16,330		$	12,716	$	13,347		$	16,048		$	58,441		$	12,826		$	13,763		$	15,020		$	15,302		$	56,911
Product cost		5,723			2,919		2,880			3,989			15,511			2,520			2,364			3,058			3,322			11,264
Operating and maintenance expense		7,449			6,812		7,220			7,310			28,791			8,866			4,395			5,824			5,601			24,686
Depreciation and accretion		600			600		609			628			2,437			699			728			1,477			816			3,720
Direct general and administrative expenses		301			235		279			334			1,149			498			470			510			712			2,190
Other, net		207			166		182			164			719			190			200			194			162			746
Segment profit	$	2,050		$	1,984	$	2,177		$	3,623		$	9,834		$	53		$	5,606		$	3,957		$	4,689		$	14,305

* Because Four Corners, Wamsutter and the additional 20% interest in Discovery were affiliates of Williams at the time of these acquisitions, the transactions were between entities under common control, and have been accounted for at historical cost. Accordingly, these tables have been recast to reflect the historical results of Four Corners, Wamsutter and Equity Earnings in Discovery throughout the periods presented.

Operating Information
Williams Partners:
Conway storage revenues	$	5,105	$	5,924	$	6,581	$	7,627	$	25,237	$	6,410	$	6,818	$	7,404	$	7,384	$	28,016
Conway fractionation volumes (bpd) — our 50%		46,042		39,669		38,517		31,374		38,859		31,316		36,220		35,574		34,682		34,460
Carbonate Trend gathered volumes (MMBtu/d)		33,407		29,327		27,650		26,995		29,323		25,187		19,127		22,080		24,226		22,651
Williams Four Corners:
Gathered volumes (MMBtu/d)		1,511,867		1,473,371		1,501,978		1,512,304		1,499,937		1,452,694		1,461,514		1,468,598		1,386,512		1,442,219
Processed volumes (MMBtu/d)		868,200		861,876		878,965		893,022		875,600		866,116		872,091		889,576		786,271		851,241
Liquid sales gallons (000s)		41,413		43,874		47,009		49,714		182,010		45,603		39,031		46,098		35,957		166,689
Net liquids margin (cents/gallon)	$	0.37	$	0.49	$	0.56	$	0.45	$	0.47	$	0.41	$	0.53	$	0.63	$	0.91	$	0.61
Wamsutter - 100%:
Gathered volumes (MMBtu/d)		468,243		475,703		498,124		517,775		490,119		509,857		521,586		512,808		519,428		515,938
Processed volumes (MMBtu/d)		264,744		270,752		282,024		293,116		277,749		302,029		312,414		308,659		319,515		310,697
Liquid sales gallons (000s)		35,891		38,259		33,983		32,635		140,768		28,053		26,789		25,114		33,191		113,147
Net liquids margin (cents/gallon)	$	0.14	$	0.34	$	0.41	$	0.29	$	0.29	$	0.27	$	0.40	$	0.48	$	0.72	$	0.48
Discovery Producer Services - - 100%
Gathered volumes (MMBtu/d)		581,788		342,037		435,885		514,486		467,338		547,504		616,172		579,588		583,106		581,685
Gross processing margin ($/MMBtu)	$	0.16	$	0.25	$	0.28	$	0.25	$	0.23	$	0.23	$	0.24	$	0.32	$	0.53	$	0.33