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Document and Entity Information - USD ($)	12 Months Ended
Dec. 31, 2010	Feb. 15, 2011	Jun. 30, 2010
Document and Entity Information
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2010
Document Fiscal Year Focus	2010
Document Fiscal Period Focus	FY
Trading Symbol	SWX
Entity Registrant Name	SOUTHWEST GAS CORP
Entity Central Index Key	0000092416
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		45,784,435
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 1,340,088,830
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	12 Months Ended
CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2010	Dec. 31, 2009
Utility plant:
Gas plant	$ 4,569,105	$ 4,418,286
Less: accumulated depreciation	(1,535,429)	(1,431,106)
Acquisition adjustments, net	1,271	1,451
Construction work in progress	37,489	45,872
Net utility plant (Note 2)	3,072,436	3,034,503
Other property and investments	134,648	115,860
Restricted cash	37,781	49,769
Current assets:
Cash and cash equivalents	116,096	65,315
Accounts receivable, net of allowances (Note 3)	147,605	157,722
Accrued utility revenue	64,400	71,700
Income taxes receivable, net	21,514	8,549
Deferred income taxes (Note 12)	8,046	22,410
Deferred purchased gas costs (Note 4)	356	3,251
Prepaids and other current assets (Note 4)	87,877	88,685
Total current assets	445,894	417,632
Deferred charges and other assets (Notes 4 and 13)	293,434	288,528
Total assets	3,984,193	3,906,292
Capitalization:
Common stock, $1 par (authorized - 60,000,000 shares; issued and outstanding - 45,599,036 and 45,091,734 shares) (Note 11)	47,229	46,722
Additional paid-in capital	807,885	792,339
Accumulated other comprehensive income (loss), net (Note 5)	(30,784)	(22,250)
Retained earnings	343,131	285,316
Total Southwest Gas Corporation equity	1,167,461	1,102,127
Noncontrolling interest	(465)	(41)
Total equity	1,166,996	1,102,086
Subordinated debentures due to Southwest Gas Capital II (Note 6)		100,000
Long-term debt, less current maturities (Note 7)	1,124,681	1,169,357
Total capitalization	$ 2,291,677	$ 2,371,443
Commitments and contingencies (Note 9)
Current liabilities:
Current maturities of long-term debt (Note 7)	$ 75,080	$ 1,327
Accounts payable	165,536	158,856
Customer deposits	86,891	91,668
Accrued general taxes	40,438	40,868
Accrued interest	20,162	19,644
Deferred purchased gas costs (Note 4)	123,344	93,226
Other current liabilities (Notes 4 and 13)	85,510	68,641
Total current liabilities	596,961	474,230
Deferred income taxes and other credits:
Deferred income taxes and investment tax credits (Note 12)	466,628	436,113
Taxes payable	1,234	3,079
Accumulated removal costs (Note 4)	211,000	189,000
Other deferred credits (Notes 4 and 10)	416,693	432,427
Total deferred income taxes and other credits	1,095,555	1,060,619
Total capitalization and liabilities	$ 3,984,193	$ 3,906,292

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
CASH FLOW FROM OPERATING ACTIVITIES:
Net Income	$ 103,453	$ 87,118	$ 60,973
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	190,463	190,082	193,719
Deferred income taxes	50,111	42,798	36,135
Changes in current assets and liabilities:
Accounts receivable, net of allowances	10,117	11,107	34,831
Accrued utility revenue	7,300	900	2,300
Deferred purchased gas costs	33,013	56,902	20,931
Accounts payable	6,680	(32,578)	(29,297)
Accrued taxes	(15,240)	22,497	(21,837)
Other current assets and liabilities	12,895	32,733	(3,636)
Gains on sale	(1,547)	(3,291)	(2,068)
Changes in undistributed stock compensation	4,429	3,942	3,825
AFUDC and property-related changes	(945)	(1,221)	(561)
Changes in other assets and deferred charges	(12,262)	(15,553)	(5)
Changes in other liabilities and deferred credits	(17,474)	10,366	4,438
Net cash provided by operating activities	370,993	405,802	299,748
CASH FLOW FROM INVESTING ACTIVITIES:
Construction expenditures and property additions	(215,439)	(216,985)	(300,217)
Restricted cash	11,988	(49,769)
Changes in customer advances	(830)	(2,476)	4,044
Receipt of exchange fund deposit			28,000
Miscellaneous inflows	4,075	7,933	17,656
Miscellaneous outflows	(2,800)	(3,620)	(2,693)
Net cash used in investing activities	(203,006)	(264,917)	(253,210)
CASH FLOW FROM FINANCING ACTIVITIES:
Issuance of common stock, net	11,098	18,401	35,391
Dividends paid	(44,846)	(41,950)	(38,705)
Interest rate swap settlement	(11,691)
Issuance of long-term debt, net	123,960	49,834	103,875
Retirement of long-term debt	(3,327)	(15,654)	(198,691)
Redemption of subordinated debentures	(100,000)
Change in long-term portion of credit facility	(92,400)	(57,600)
Change in short-term debt		(55,000)	46,000
Net cash used in financing activities	(117,206)	(101,969)	(52,130)
Change in cash and cash equivalents	50,781	38,916	(5,592)
Cash and cash equivalents at beginning of period	65,315	26,399	31,991
Cash and cash equivalents at end of period	116,096	65,315	26,399
Supplemental information:
Interest paid, net of amounts capitalized	87,000	80,771	91,211
Income taxes paid (received)	$ 19,200	$ (21,616)	$ 22,472

Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2010
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies	div p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" color="#2d844b" size="2"Note 1 - Summary of Significant Accounting Policies /font/p p style="margin-top: 0px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iNature of Operations./inbsp;nbsp;nbsp;nbsp;Southwest Gas Corporation and its subsidiaries (the "Company") consist of two segments: natural gas operations ("Southwest" or the "natural gas operations" segment) and construction services. Southwest is engaged in the business of purchasing, distributing, and transporting natural gas to customers in portions of Arizona, Nevada, and California. The public utility rates, practices, facilities, and service territories of Southwest are subject to regulatory oversight. Natural gas purchases and the timing of related recoveries can materially impact liquidity. NPL Construction Co. ("NPL" or the "construction services" segment), a wholly owned subsidiary, is a full-service underground piping contractor that provides utility companies with trenching and installation, replacement, and maintenance services fo r energy distribution systems. In November 2009, NPL entered into a venture to market natural gas engine-driven heating, ventilating, and air conditioning ("HVAC") technology and products. NPL has a 65nbsp;percent interest in the entity (IntelliChoice Energy, "ICE") and consolidates ICE as a majority-owned subsidiary. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iBasis of Presentation./inbsp;nbsp;nbsp;nbsp;The Company follows generally accepted accounting principles in the United States ("U.S. GAAP") in accounting for all of its businesses. Accounting for the natural gas utility operations conforms with U.S. GAAP as applied to regulated companies and as prescribed by federal agencies and the commissions of the various states in which the utility operates. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iConsolidation./inbsp;nbsp;nbsp;nbsp;The accompanying financial statements are presented on a consolidated basis and include the accounts of Southwest Gas Corporation and all subsidiaries. All significant intercompany balances and transactions have been eliminated with the exception of transactions between Southwest and NPL in accordance with accounting treatment for rate-regulated entities. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iNet Utility Plant./inbsp;nbsp;nbsp;nbsp;Net utility plant includes gas plant at original cost, less the accumulated provision for depreciation and amortization, plus the unamortized balance of acquisition adjustments. Original cost includes contracted services, material, payroll and related costs such as taxes and benefits, general and administrative expenses, and an allowance for funds used during construction, less contributions in aid of construction. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iDeferred Purchased Gas Costs./inbsp;nbsp;nbsp;nbsp;The various regulatory commissions have established procedures to enable Southwest to adjust its billing rates for changes in the cost of natural gas purchased. The difference between the current cost of gas purchased and the cost of gas recovered in billed rates is deferred. Generally, these deferred amounts are recovered or refunded within one year. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iIncome Taxes./inbsp;nbsp;nbsp;nbsp;The Company uses the asset and liability method of accounting for income taxes. Under the asset and liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period that includes the enactment date. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"For regulatory and financial reporting purposes, investment tax credits ("ITC") related to gas utility operations are deferred and amortized over the life of related fixed assets. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iCash and Cash Equivalents./inbsp;nbsp;nbsp;nbsp;For purposes of reporting consolidated cash flows, cash and cash equivalents include cash on hand and financial instruments with a purchase-date maturity of three months or less. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iAccumulated Removal Costs.nbsp;nbsp;nbsp;nbsp;/iApproved regulatory practices allow Southwest to include in depreciation expense a component to recover removal costs associated with utility plant retirements. In accordance with the Securities and Exchange Commission's ("SEC") position on presentation of these amounts, management has reclassified $211nbsp;million and $189nbsp;million, as of Decembernbsp;31, 2010 and 2009, respectively, of estimated removal costs from accumulated depreciation to accumulated removal costs within the liabilities section of the balance sheets. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iGas Operating Revenues./inbsp;nbsp;nbsp;nbsp;Revenues are recorded when customers are billed. Customer billings are based on monthly meter reads and are calculated in accordance with applicable tariffs and state and local laws, regulations, and agreements. An estimate of the amount of natural gas distributed, but not yet billed, to residential and commercial customers from the latest meter reading date to the end of the reporting period is also recognized as accrued utility revenue. Revenues also include the net impacts of margin tracker accruals. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"The Company acts as an agent for state and local taxing authorities in the collection and remission of a variety of taxes, including franchise fees, sales and use taxes, and surcharges. These taxes are not included in gas operating revenues, except for certain franchise fees in California operating jurisdictions which are not significant. The Company uses the net classification method to report taxes collected from customers to be remitted to governmental authorities. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iConstruction Revenues./inbsp;nbsp;nbsp;nbsp;The majority of NPL contracts are performed under unit price contracts. Generally, these contracts state prices per unit of installation. Typical installations are accomplished in two weeks or less. Revenues are recorded as installations are completed. Long-term fixed-price contracts use the percentage-of-completion method of accounting and, therefore, take into account the cost, estimated earnings, and revenue to date on contracts not yet completed. The amount of revenue recognized is based on costs expended to date relative to anticipated final contract costs. Revisions in estimates of costs and earnings during the course of the work are reflected in the accounting period in which the facts requiring revision become known. If a loss on a contract becomes known or is anticipated, the entire amount of the estimated ultimate loss is recognized at that time in the financial statements. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iConstruction Expenses./inbsp;nbsp;nbsp;nbsp;The construction expenses classification in the income statement includes payroll expenses, job-related equipment costs, direct construction costs, gains and losses on equipment sales, general and administrative expenses, and office-related fixed costs of NPL. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iNet Cost of Gas Sold./inbsp;nbsp;nbsp;nbsp;Components of net cost of gas sold include natural gas commodity costs (fixed-price and variable-rate), pipeline capacity/transportation costs, and actual settled costs of derivative instruments. Also included are the net impacts of PGA deferrals and recoveries. /font/p p style="margin-top: 12px; margin-bottom: 0px; font-size: 1px;"nbsp;/p p style="margin-top: 0px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iOperations and Maintenance Expense./inbsp;nbsp;nbsp;nbsp;For financial reporting purposes, operations and maintenance expense includes Southwest's operating and maintenance costs associated with serving utility customers, uncollectible expense, administrative and general salaries and expense, employee benefits expense, and legal expense (including injuries and damages). /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iDepreciation and Amortization./inbsp;nbsp;nbsp;nbsp;Utility plant depreciation is computed on the straight-line remaining life method at composite rates considered sufficient to amortize costs over estimated service lives, including components which compensate for salvage value, removal costs, and retirements, as approved by the appropriate regulatory agency. When plant is retired from service, the original cost of plant, including cost of removal, less salvage, is charged to the accumulated provision for depreciation. Other regulatory assets, including acquisition adjustments, are amortized when appropriate, over time periods authorized by regulators. Nonutility and construction services-related property and equipment are depreciated on a straight-line method based on the estimated useful lives of the related assets. Costs and gains related to refunding utility debt and debt issuance expenses are deferred and amortized over the weighted-average lives of the new issues and become a component of interest expense. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iAllowance for Funds Used During Construction ("AFUDC")./inbsp;nbsp;nbsp;nbsp;AFUDC represents the cost of both debt and equity funds used to finance utility construction. AFUDC is capitalized as part of the cost of utility plant. The Company capitalized $1.5nbsp;million in 2010, $2.2nbsp;million in 2009, and $1.2nbsp;million in 2008 of AFUDC related to natural gas utility operations. The debt portion of AFUDC is reported in the consolidated statements of income as an offset to net interest deductions and the equity portion is reported as other income. The debt portion of AFUDC was $512,000, $957,000, and $635,000 for 2010, 2009, and 2008, respectively. Utility plant construction costs, including AFUDC, are recovered in authorized rates through depreciation when completed projects are placed into operation, and general rate reli ef is requested and granted. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iOther Income (Deductions).nbsp;nbsp;nbsp;nbsp;/iThe following table provides the composition of significant items included in Other income (deductions) on the consolidated statements of income (thousands of dollars): /font/p p style="margin-top: 0px; margin-bottom: 0px; font-size: 12px;"nbsp;/p table border="0" cellspacing="0" cellpadding="0" width="100%" align="center" trtd width="74%" /td td valign="bottom" width="4%" /td td /td td /td td /td td valign="bottom" width="4%" /td td /td td /td td /td td valign="bottom" width="4%" /td td /td td /td td /td/tr trtd style="border-bottom: #2d844b 1px solid;" valign="bottom"nbsp;font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" color="#2d844b" size="2"2010/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"2009/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"2008/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td/tr trtd height="16" /td td height="16" colspan="4" /td td height="16" colspan="4" /td td height="16" colspan="4" /td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Change in COLI policies/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"9,770/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"8,546/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(12,041/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Interest income/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"194/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"271/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"2,212/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Pipe replacement costs/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(5,024/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(2,642/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(1,942/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Miscellaneous income and (expense)/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(1,090/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"470/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(1,635/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Total other income (deductions)/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,850/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"6,645/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(13,406/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr/table p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Included in the table above is the change in cash surrender values of company-owned life insurance ("COLI") policies (including net death benefits recognized). These life insurance policies on members of management and other key employees are used by Southwest to indemnify itself against the loss of talent, expertise, and knowledge, as well as to provide indirect funding for certain nonqualified benefit plans. Current tax regulations provide for tax-free treatment of life insurance (death benefit) proceeds. Therefore, the change in the cash surrender value components of COLI policies, as they progress towards the ultimate death benefits, are also recorded without tax consequences. Pipe replacement costs include amounts associated with certain Arizona non-recoverable pipe replacement work. /font/p p style="margin-top: 12px; margin-bottom: 0px; font-size: 1px;"nbsp;/p p style="margin-top: 0px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iEarnings Per Share./inbsp;nbsp;nbsp;nbsp;Basic earnings per share ("EPS") are calculated by dividing net income by the weighted-average number of shares outstanding during the period. Diluted EPS includes the effect of additional weighted-average common stock equivalents (stock options, performance shares, and restricted stock units). Unless otherwise noted, the term "Earnings Per Share" refers to Basic EPS. A reconciliation of the shares used in the Basic and Diluted EPS calculations is shown in the following table. Net income was the same for Basic and Diluted EPS calculations. /font/p p style="margin-top: 0px; margin-bottom: 0px; font-size: 12px;"nbsp;/p table border="0" cellspacing="0" cellpadding="0" width="100%" align="center" trtd width="79%" /td td valign="bottom" width="1%" /td td /td td /td td /td td valign="bottom" width="1%" /td td /td td /td td /td td valign="bottom" width="1%" /td td /td td /td td /td/tr trtd style="border-bottom: #2d844b 1px solid;" valign="bottom"nbsp;font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" color="#2d844b" size="2"2010/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"2009/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"2008/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td/tr trtd valign="bottom" p align="justify"font style="font-family: ARIAL;" class="_mt" size="1"(In thousands)/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" colspan="2"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" colspan="2"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" colspan="2"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Average basic shares/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"45,405/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"44,752/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"43,476/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Effect of dilutive securities:/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Stock options/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"56/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"14/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"60/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Performance shares/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"260/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"216/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"193/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Restricted stock units/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"102/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"80/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"46/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Average diluted shares/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"45,823/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"45,062/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"43,775/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr/table p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iSubsequent Events./inbsp;nbsp;nbsp;nbsp;Management of the Company monitors significant events occurring after the balance sheet date and prior to the issuance of the financial statements to determine the impacts, if any, of events on the financial statements to be issued. See Notenbsp;7 ndash; Long-Term Debt for information regarding debt issued subsequent to Decembernbsp;31, 2010. /font/p /div

Utility Plant	12 Months Ended
Utility Plant	Dec. 31, 2010
Utility Plant
Utility Plant	div div div div div p style="margin-top: 18px; margin-bottom: 0px;"font style="font-family: ARIAL;" class="_mt" color="#2d844b" size="2"Note 2 ndash; Utility Plant /font/p p style="margin-top: 0px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Net utility plant as of Decembernbsp;31, 2010 and 2009 was as follows (thousands of dollars): /font/p p style="margin-top: 0px; margin-bottom: 0px; font-size: 12px;"nbsp;/p table border="0" cellspacing="0" cellpadding="0" width="100%" align="center" trtd width="76%" /td td valign="bottom" width="4%" /td td /td td /td td /td td valign="bottom" width="4%" /td td /td td /td td /td/tr trtd style="border-bottom: #2d844b 1px solid;" valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"Decembernbsp;31,/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" color="#2d844b" size="2"2010/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"2009/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Gas plant:/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Storage/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"20,396/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"20,326/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Transmission/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"274,646/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"271,467/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Distribution/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,847,731/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,716,881/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"General/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"279,402/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"270,825/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Other/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"146,930/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"138,787/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"4,569,105/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"4,418,286/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Less: accumulated depreciation/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(1,535,429/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(1,431,106/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Acquisition adjustments, net/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,271/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,451/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Construction work in progress/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"37,489/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"45,872/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Net utility plant/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,072,436/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,034,503/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr/table p style="margin-top: 12px; margin-bottom: 0px; font-size: 1px;"nbsp;/p p style="margin-top: 0px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Depreciation and amortization expense on gas plant was $167nbsp;million in 2010 and $162 million in both 2009 and 2008. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"iOperating Leases and Rentals./inbsp;nbsp;nbsp;nbsp;Southwest leases a portion of its corporate headquarters office complex in Las Vegas and its administrative offices in Phoenix. The leases provide for current terms which expire in 2017 and 2014, respectively, with optional renewal terms available at the expiration dates. The rental payments for the corporate headquarters office complex are $2nbsp;million in each of the years 2011 through 2015 and $4nbsp;million cumulatively thereafter. The rental payments for the Phoenix administrative offices are $1.4nbsp;million in each of the years 2011 through 2013, and $243,000 in 2014 when the lease expires. In addition to the above, the Company leases certain office and construction equipment. The majority of these leases are short-term. These leases are accounted for as operating lease s, and for the gas segment are treated as such for regulatory purposes. Rentals included in operating expenses for all operating leases were $19.4nbsp;million in 2010, $19.9nbsp;million in 2009, and $23.4 million in 2008. These amounts include NPL lease expenses of approximately $11.8nbsp;million in 2010, $11.3nbsp;million in 2009, and $13.9nbsp;million in 2008, for various short-term operating leases of equipment and temporary office sites. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"The following is a schedule of future minimum lease payments for significant non-cancelable operating leases (with initial or remaining terms in excess of one year) as of Decembernbsp;31, 2010 (thousands of dollars): /font/p p style="margin-top: 0px; margin-bottom: 0px; font-size: 12px;"nbsp;/p table border="0" cellspacing="0" cellpadding="0" width="100%" align="center" trtd width="89%" /td td valign="bottom" width="6%" /td td /td td /td td /td/tr trtd style="border-bottom: #2d844b 1px solid;" valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"Year Ending Decembernbsp;31,/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2"nbsp;font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"2011/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"5,547nbsp;nbsp;/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"2012/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"4,904nbsp;nbsp;/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"2013/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"4,697nbsp;nbsp;/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"2014/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,138nbsp;nbsp;/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"2015/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"2,754nbsp;nbsp;/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Thereafter/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,599nbsp;nbsp;/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Total minimum lease payments/font/p/td/tr/table/div/div/div/div /div

Derivatives and Fair Value Measurements

12 Months Ended

Dec. 31, 2010

Derivatives and Fair Value Measurements

Derivatives and Fair Value Measurements

Note 13 – Derivatives and Fair Value Measurements

Derivatives. In managing its natural gas supply portfolios, Southwest has historically entered into fixed- and variable-price contracts, which qualify as derivatives. Southwest also utilizes fixed-for-floating swap contracts ("Swaps") to supplement its fixed-price contracts. The fixed-price contracts, firm commitments to purchase a fixed amount of gas in the future at a fixed price, qualify for the normal purchases and normal sales exception that is allowed for contracts that are probable of delivery in the normal course of business and are exempt from fair value reporting. The variable-price contracts have no significant market value. The Swaps are recorded at fair value.

The fixed-price contracts and Swaps are utilized by Southwest under its volatility mitigation programs to effectively fix the price on a portion (ranging from 25 percent to 50 percent, depending on the jurisdiction) of its natural gas portfolios. The maturities of the Swaps highly correlate to forecasted purchases of natural gas, during time frames ranging from January 2011 through October 2012. Under such contracts, Southwest pays the counterparty at a fixed rate and receives from the counterparty a floating rate per MMBtu ("dekatherm") of natural gas. Only the net differential is actually paid or received. The differential is calculated based on the notional amounts under the contracts (approximately 14.2 million dekatherms at December 31, 2010 and 13.6 million dekatherms at December 31, 2009). Southwest does not utilize derivative financial instruments for speculative purposes, nor does it have trading operations.

The following table sets forth the gains and (losses) recognized on the Company's Swaps (derivatives) for the years ended December 31, 2010, 2009, and 2008 and their location in the income statements (thousands of dollars):

Derivatives not designated as hedging instruments:


	Location of Gain or (Loss) Recognized in Income on Derivative	Amount of Gain or (Loss) Recognized in Income on Derivative
		Year Ended December 31, 2010			Year Ended December 31, 2009			Year Ended December 31, 2008
Swaps	Net cost of gas sold	$	(27,690	)	$	(4,391	)	$	(18,351	)
Swaps	Net cost of gas sold		27,690	*		4,391	*		18,351	*

Total		$	—		$	—		$	—

* Represents the impact of regulatory deferral accounting treatment under U.S. GAAP for rate-regulated entities.

In January 2010, Southwest entered into two forward starting interest rate swaps ("FSIRS") to hedge the risk of interest rate variability during the period leading up to the planned issuance of fixed-rate debt to replace $200 million of debt maturing in February 2011 and $200 million maturing in May 2012. The counterparties to each agreement are four major banking institutions. The first FSIRS was a designated cash flow hedge and had a notional amount of $125 million. It terminated in December 2010 concurrent with the related issuance of $125 million 4.45% 10-year Senior Notes. At settlement of the first FSIRS, Southwest paid an aggregate $11.7 million to the counterparties. The second FSIRS has a notional amount of $100 million (with Southwest as the fixed-rate payer at a rate of 4.78%) and has a mandatory termination date on or befo re March 20, 2012.

Southwest previously designated the second FSIRS agreement as a cash flow hedge of forecasted future interest payments. At the inception of the hedge, the terms of the derivative were the same as a perfect hypothetical derivative; thus, there is an expectation that there will be no ineffectiveness, and that the effective portion of unrealized gains and losses on the FSIRS leading up to the forecasted debt issuance will be reported as a component of other comprehensive income. At termination, the final value will be reclassified from accumulated other comprehensive income into earnings over the terms of the debt issuance which is the same period the hedged forecasted transaction affects earnings. However, should conditions occur that indicate the existence of ineffectiveness (e.g., deterioration of counterparty creditworthiness, delay in the forecasted debt issuances, etc.), Sout hwest will measure ineffectiveness by comparing changes in the fair value of the FSIRS with changes in the fair value of a hypothetical swap (the hypothetical derivative method). Gains and losses due to ineffectiveness will be recognized immediately in earnings. At December 31, 2010, the remaining FSIRS continued to qualify as an effective hedge. There was no gain or (loss) reclassified from accumulated other comprehensive income ("AOCI") into income (effective portion) and no gain or (loss) recognized in income (ineffective portion) for the Company's second derivative designated as a hedging instrument.

The following table sets forth the gains and (losses) on a before-tax basis recognized on the Company's FSIRS (thousands of dollars):

Derivatives designated as hedging instruments:

Gains (losses) on derivatives in cash flow hedging relationships:


	Gains (losses) on interest rate swaps — FSIRS
	Year Ended December 31, 2010
Amount of Gain or (Loss) on Unrealized FSIRS Recognized in Other Comprehensive Income on Derivative (Effective Portion)	$	(6,755	)
Amount of Gain or (Loss) on Realized FSIRS Recognized in Other Comprehensive Income on Derivative		(11,691	)

Total	$	(18,446	)

There were no gains or (losses) on derivatives designated as cash flow hedging instruments for the years ended December 31, 2009 and 2008.

The following table sets forth the fair values of the Company's Swaps and FSIRS and their location in the balance sheets (thousands of dollars):

Fair values of derivatives not designated as hedging instruments:


December 31, 2010	Balance Sheet Location	Asset Derivatives		Liability Derivatives			Net Total
Swaps	Deferred charges and other assets	$	656	$	—		$	656
Swaps	Other current liabilities		65		(11,547	)		(11,482	)

Total		$	721	$	(11,547	)	$	(10,826	)


December 31, 2009	Balance Sheet Location	Asset Derivatives		Liability Derivatives			Net Total
Swaps	Deferred charges and other assets	$	85	$	(27	)	$	58
Swaps	Prepaids and other current assets		2,921		(361	)		2,560
Swaps	Other current liabilities		309		(1,730	)		(1,421	)
Swaps	Other deferred credits		25		(100	)		(75	)

Total		$	3,340	$	(2,218	)	$	1,122


Fair values of derivatives designated as hedging instruments:
December 31, 2010	Balance Sheet Location	Asset Derivatives		Liability Derivatives			Net Total
FSIRS	Other deferred credits	$	—	$	(6,755	)	$	(6,755	)

There were no derivatives designated as hedging instruments at December 31, 2009.

The estimated fair values of the Swaps were determined using future natural gas index prices (as more fully described below). The Company has master netting arrangements with each counterparty that provide for the net settlement of all contracts through a single payment. As applicable, the Company has elected to reflect the net amounts in its balance sheets.

Pursuant to regulatory deferral accounting treatment for rate-regulated entities, Southwest records the unrealized gains and losses in fair value of the Swaps as a regulatory asset and/or liability. When the Swaps mature, Southwest reverses any prior positions held and records the settled position as an increase or decrease of purchased gas under the related purchased gas adjustment ("PGA") mechanism in determining its deferred PGA balances. During the year ended December 31, 2010, Southwest paid counterparties $16.6 million in settlement of matured Swaps and received $831,000 from counterparties in settlement of matured Swaps. During the years ended December 31, 2009 and 2008, Southwest paid counterparties $19.7 million and $4.2 million, respectively, in settlements of matured Swaps. Neither changes in the fair value of the Swaps nor realized amounts have a direct effect on earnings or other comprehensive income.

At December 31, 2010, regulatory assets/liabilities offsetting the amounts in the above table were recorded in Prepaids and other current assets ($11.5 million) and Other deferred credits ($656,000). At December 31, 2009, regulatory assets/liabilities offsetting the amounts in the balance sheet were recorded in Prepaids and other current assets ($1.4 million), Other current liabilities ($2.6 million), Other deferred credits ($58,000), and Deferred charges and other assets ($75,000).

Fair Value Measurements. The estimated fair values of Southwest's Swaps were determined at December 31, 2010 and 2009 using NYMEX futures settlement prices for delivery of natural gas at Henry Hub, adjusted by the price of New York Mercantile Exchange ("NYMEX") ClearPort basis Swaps, which reflect the difference between the price of natural gas at a given delivery basin and the Henry Hub pricing points. These Level 2 inputs are observable in the marketplace throughout the full term of the Swaps, but have been credit-risk adjusted with no significant impact to the overall fair value measure.

The estimated fair value of Southwest's FSIRS was determined using a discounted cash flow model that utilizes forward interest rate curves. The inputs to the model are the terms of the FSIRS. These Level 2 inputs are observable in the marketplace throughout the full term of the FSIRS, but have been credit-risk adjusted with no significant impact to the overall fair value measure.

See Note 10 – Pension and Other Postretirement Benefits for definitions of the levels of the fair value hierarchy. The following table sets forth, by level within the fair value hierarchy, the Company's financial asset and liability derivatives that were accounted for at fair value:

Level 2 - Significant other observable inputs


(Thousands of dollars)	December 31, 2010			December 31, 2009

Assets at fair value:
Prepaids and other current assets — swaps	$	—		$	2,560
Deferred charges and other assets — swaps		656			58

Liabilities at fair value:
Other current liabilities — swaps		(11,482	)		(1,421	)
Other deferred credits — swaps		—			(75	)
Other deferred credits — FSIRS		(6,755	)		—

Net Assets (Liabilities)	$	(17,581	)	$	1,122

No financial assets or liabilities accounted for at fair value fell within Level 1 or Level 3 of the fair value hierarchy.

Related Tax Effects of Designated Hedging Activities Allocated to Each Component of Other Comprehensive Income


	2010
	Before- Tax Amount			Tax (Expense) or Benefit (1)			Net-of- Tax Amount
(Thousands of dollars)
FSIRS:
Unrealized/realized loss	$	(18,446	)	$	7,010		$	(11,436	)
Amounts reclassified into net income		97			(37	)		60

Other comprehensive (income) loss	$	(18,349	)	$	6,973		$	(11,376	)

(1)	Tax amounts are calculated using a 38 percent rate.

There were no FSIRS for the years ended December 31, 2009 and 2008.

See Note 5 – Accumulated Other Comprehensive Income for more information on the FSIRS.

- Definition

Combined disclosure of Derivatives and Fair Value Measurements. Derivatives: Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising there from, and the amounts of and methodologies and assumptions used in determining the amounts of such items. Fair Value: represents the complete disclosure regarding the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the Company is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risk is are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair va lue measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Segment Information	12 Months Ended
Segment Information	Dec. 31, 2010
Segment Information
Segment Information	div p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" color="#2d844b" size="2"Note 14 ndash; Segment Information /font/p p style="margin-top: 0px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Company operating segments are determined based on the nature of their activities. The natural gas operations segment is engaged in the business of purchasing, transporting, and distributing natural gas. Revenues are generated from the sale and transportation of natural gas. The construction services segment is engaged in the business of providing utility companies with trenching and installation, replacement, and maintenance services for energy distribution systems. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"The accounting policies of the reported segments are the same as those described within Note 1 - Summary of Significant Accounting Policies. NPL accounts for the services provided to Southwest at contractual (market) prices. At Decembernbsp;31, 2010 and 2009, accounts receivable for these services totaled $8.1nbsp;million and $5.3nbsp;million, respectively, which were not eliminated during consolidation. /font/p p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"The financial information pertaining to the natural gas operations and construction services segments for each of the three years in the period ended Decembernbsp;31, 2010 is as follows (thousands of dollars): /font/p p style="margin-top: 0px; margin-bottom: 0px; font-size: 12px;"nbsp;/p table border="0" cellspacing="0" cellpadding="0" width="100%" align="center" trtd width="52%" /td td valign="bottom" width="5%" /td td /td td /td td /td td valign="bottom" width="5%" /td td /td td /td td /td td valign="bottom" width="5%" /td td /td td /td td /td td valign="bottom" width="5%" /td td /td td /td td /td/tr trtd style="border-bottom: #2d844b 1px solid;" valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"2010/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Gasbr /Operations/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Constructionbr /Services/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Adjustmentsnbsp;(a)/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Total/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Revenues from unaffiliated customers/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,511,907/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"257,213/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,769,120/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Intersegment sales/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"#8212;/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"61,251/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"61,251/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Total/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,511,907/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"318,464/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,830,371/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Interest revenue/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"158/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"36/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"194/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Interest expense/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"77,025/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"564/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"77,589/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Depreciation and amortization/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"170,456/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"20,007/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"190,463/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Income tax expense/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"47,073/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"7,852/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"54,925/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Segment income/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"91,382/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"12,495/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"103,877/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Segment assets/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,845,111/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"139,082/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,984,193/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Capital expenditures/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"188,379/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"27,060/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"215,439/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd height="16" /td td height="16" colspan="4" /td td height="16" colspan="4" /td td height="16" colspan="4" /td td height="16" colspan="4" /td/tr trtd style="border-bottom: #2d844b 1px solid;" valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"2009/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Gasbr /Operations/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Constructionbr /Services/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Adjustmentsnbsp;(a)/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Total/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Revenues from unaffiliated customers/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,614,843/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"226,407/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,841,250/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Intersegment sales/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"#8212;/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"52,574/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"52,574/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Total/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,614,843/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"278,981/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,893,824/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Interest revenue/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"189/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"82/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"271/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Interest expense/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"81,822/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,179/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"83,001/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Depreciation and amortization/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"166,850/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"23,232/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"190,082/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Income tax expense/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"40,451/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"4,466/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"44,917/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Segment income/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"79,420/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"8,062/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"87,482/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Segment assets/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,782,913/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"124,755/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(1,376/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,906,292/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Capital expenditures/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"212,919/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"4,066/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"216,985/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd style="border-bottom: #2d844b 1px solid;" valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"2008/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Gasbr /Operations/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Constructionbr /Services/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Adjustmentsnbsp;(a)/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Total/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Revenues from unaffiliated customers/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,791,395/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"290,218/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"2,081,613/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Intersegment sales/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"#8212;/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"63,130/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"63,130/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td td style="border-top: #000000 1px solid;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 2em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Total/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,791,395/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"353,348/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"2,144,743/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Interest revenue/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"2,107/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"105/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"2,212/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Interest expense/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"90,825/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1,823/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"92,648/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Depreciation and amortization/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"166,337/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"27,382/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"193,719/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Income tax expense/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"35,600/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"5,235/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"40,835/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Segment income/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"53,747/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"7,226/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"60,973/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Segment assets/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,680,327/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"140,057/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"3,820,384/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Capital expenditures/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"279,254/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"20,963/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"300,217/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr tr style="font-size: 1px;"td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td td valign="bottom"nbsp;nbsp;/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"nbsp;nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td td style="border-top: #000000 3px double;" valign="bottom"nbsp;/td tdnbsp;/td/tr/table p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"(a) Construction services segment assets include income taxes payable of $1.4 million in 2009, which were netted against gas operations segment income taxes receivable, net during consolidation. /font/p /div

Quarterly Financial Data	12 Months Ended
Quarterly Financial Data	Dec. 31, 2010
Quarterly Financial Data
Quarterly Financial Data	div divfont style="font-family: Times New Roman;" class="_mt" size="2" /font div p style="margin-top: 0px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" color="#2d844b" size="2"Note 15 - Quarterly Financial Data (Unaudited) /font/p p style="margin-top: 0px; margin-bottom: 0px; font-size: 12px;"nbsp;/p table border="0" cellspacing="0" cellpadding="0" width="100%" align="center" trtd width="54%" /td td valign="bottom" width="5%" /td td /td td /td td /td td valign="bottom" width="5%" /td td /td td /td td /td td valign="bottom" width="5%" /td td /td td /td td /td td valign="bottom" width="5%" /td td /td td /td td /td/tr trtd style="border-bottom: #2d844b 1px solid;" valign="bottom"nbsp;font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="14" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Quarter Ended/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td/tr trtd style="border-bottom: #2d844b 1px solid;" valign="bottom"nbsp;font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Marchnbsp;31/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Junenbsp;30/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Septembernbsp;30/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom" colspan="2" align="center"font style="font-family: ARIAL;" class="_mt" size="2"Decembernbsp;31/font/td td style="border-bottom: #2d844b 1px solid;" valign="bottom"font class="_mt" size="1"nbsp;/font/td/tr trtd valign="bottom"font style="font-family: ARIAL;" class="_mt" size="1"(Thousands of dollars, except per share amounts)/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" colspan="14"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"2010/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Operating revenues/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"668,751/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"385,825/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"307,683/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"468,112/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Operating income/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"121,732/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"24,031/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"184/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"86,170/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Net income (loss)/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"64,648/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(933/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(4,823/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"44,985/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Basic earnings (loss) per common share/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1.43/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.02/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.11/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"0.99/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Diluted earnings (loss) per common share/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1.42/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.02/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.11/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"0.98/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd height="16" /td td height="16" colspan="4" /td td height="16" colspan="4" /td td height="16" colspan="4" /td td height="16" colspan="4" /td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"2009/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Operating revenues/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"689,862/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"387,648/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"317,509/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"498,805/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Operating income/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"102,729/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"14,685/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"522/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"90,455/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Net income (loss)/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"49,981/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(594/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(8,297/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"46,392/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Basic earnings (loss) per common share/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1.13/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.01/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.18/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1.03/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Diluted earnings (loss) per common share/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1.12/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.01/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.18/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1.02/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd height="16" /td td height="16" colspan="4" /td td height="16" colspan="4" /td td height="16" colspan="4" /td td height="16" colspan="4" /td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"2008/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom" /td td valign="bottom" /td td valign="bottom" /td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Operating revenues/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"813,607/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"447,304/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"374,422/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"$/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"509,410/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Operating income/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"104,685/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"18,256/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"2,900/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"82,021/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Net income (loss)/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"49,152/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(2,725/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(16,686/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"31,232/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Basic earnings (loss) per common share/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1.14/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.06/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.38/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"0.71/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr trtd valign="top" p style="text-indent: -1em; margin-left: 1em;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"Diluted earnings (loss) per common share/font/p/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"1.14/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.06/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"(0.38/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2")nbsp;/font/td td valign="bottom"font class="_mt" size="1"nbsp;/font/td td valign="bottom"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;/font/td td valign="bottom" align="right"font style="font-family: ARIAL;" class="_mt" size="2"0.71/font/td td valign="bottom" nowrap="nowrap"font style="font-family: ARIAL;" class="_mt" size="2"nbsp;nbsp;/font/td/tr/table p style="margin-top: 0px; margin-bottom: 0px; font-size: 12px;"nbsp;/p table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%" trtd valign="top" width="3%" align="left"font style="font-family: ARIAL;" class="_mt" size="2"*/font/td td valign="top" align="left" p align="justify"font style="font-family: ARIAL;" class="_mt" size="2"The sum of quarterly earnings (loss) per average common share may not equal the annual earnings (loss) per share due to the ongoing change in the weighted-average number of common shares outstanding. /font/p/td/tr/table p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"The demand for natural gas is seasonal, and it is the opinion of management that comparisons of earnings for the interim periods do not reliably reflect overall trends and changes in the operations of the Company. Also, the timing of general rate relief can have a significant impact on earnings for interim periods. See Management's Discussion and Analysis for additional discussion of operating results. /font/p/div/div /div

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Operating revenues:
Gas operating revenues	$ 1,511,907	$ 1,614,843	$ 1,791,395
Construction revenues	318,464	278,981	353,348
Total operating revenues	1,830,371	1,893,824	2,144,743
Operating expenses:
Net cost of gas sold	736,175	866,630	1,055,977
Operations and maintenance	354,943	348,942	338,660
Depreciation and amortization	190,463	190,082	193,719
Taxes other than income taxes	38,869	37,318	36,780
Construction expenses	277,804	242,461	311,745
Total operating expenses	1,598,254	1,685,433	1,936,881
Operating income	232,117	208,391	207,862
Other income and (expenses):
Net interest deductions (Notes 7 and 8)	(75,677)	(75,270)	(84,919)
Net interest deductions on subordinated debentures (Note 6)	(1,912)	(7,731)	(7,729)
Other income (deductions)	3,850	6,645	(13,406)
Total other income and (expenses)	(73,739)	(76,356)	(106,054)
Income before income taxes	158,378	132,035	101,808
Income tax expense (Note 12)	54,925	44,917	40,835
Net income	103,453	87,118	60,973
Net income (loss) attributable to noncontrolling interest	(424)	(364)
Net income attributable to Southwest Gas Corporation	$ 103,877	$ 87,482	$ 60,973
Basic earnings per share (Note 15)	$ 2.29	$ 1.95	$ 1.40
Diluted earnings per share (Note 15)	$ 2.27	$ 1.94	$ 1.39
Average number of common shares outstanding	45,405	44,752	43,476
Average shares outstanding (assuming dilution)	45,823	45,062	43,775

CONSOLIDATED STATEMENTS OF EQUITY AND COMPREHENSIVE INCOME (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
CONSOLIDATED STATEMENTS OF EQUITY AND COMPREHENSIVE INCOME
Net actuarial gain (loss) arising during the period, less amortization of unamortized benefit plan cost, tax	$ 1,700,000	$ 1,700,000	$ 4,000,000
FSIRS realized and unrealized loss, tax	7,000,000
Amounts reclassified to net income, tax	$ 37,000
Dividends declared Common, per share	$ 1	$ 0.95	$ 0.9

Preferred Trust Securities and Subordinated Debentures	12 Months Ended
Preferred Trust Securities and Subordinated Debentures	Dec. 31, 2010
Preferred Trust Securities and Subordinated Debentures
Preferred Trust Securities and Subordinated Debentures	Note 6 - Preferred Trust Securities and Subordinated Debentures In June 2003, the Company created Southwest Gas Capital II ("Trust II"), a wholly owned subsidiary, as a financing trust for the sole purpose of issuing preferred trust securities for the benefit of the Company. In August 2003, Trust II publicly issued $100 million of 7.70% Preferred Trust Securities ("Preferred Trust Securities"). In connection with the Trust II issuance of the Preferred Trust Securities and the related purchase by the Company for $3.1 million of all of the Trust II common securities ("Common Securities"), the Company issued $103.1 million principal amount of its 7.70% Junior Subordinated Debentures ("Subordinated Debentures") to Trust II. The Subordinated Debentures became redeemable at the option of the Company in August 2008. In February 2010, the Company notified holders of the Subordinated Debentures that all of these debentures (and the associated preferred and common securities) would be redeemed (at par) by the Company in March 2010. All of the outstanding Subordinated Debentures were redeemed in March 2010. The Company accomplished the redemption using existing cash and borrowings under the $300 million credit facility. Payments and amortizations associated with the Subordinated Debentures are classified on the consolidated statements of income as Net interest deductions on subordinated debentures. The estimated market value of the subordinated debentures at December 31, 2009 was $102 million.

Short-Term Debt	12 Months Ended
Short-Term Debt	Dec. 31, 2010
Short-Term Debt
Short-Term Debt	div divfont style="font-family: Times New Roman;" class="_mt" size="2" /font div p style="margin-top: 12px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" color="#2d844b" size="2"Note 8 - Short-Term Debt /font/p p style="margin-top: 0px; margin-bottom: 0px;" align="justify"font style="font-family: ARIAL;" class="_mt" size="2"As discussed in Note 7, Southwest has a $300nbsp;million credit facility that expires in May 2012, of which $150nbsp;million has been designated by management for working capital purposes (and related outstanding amounts, if any, are shown as short-term debt). Southwest had no short-term borrowings outstanding on the credit facility at Decembernbsp;31, 2010 or Decembernbsp;31, 2009. /font/p/div/div /div

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2010
Commitments and Contingencies
Commitments and Contingencies	Note 9 - Commitments and Contingencies The Company is a defendant in miscellaneous legal proceedings. The Company is also a party to various regulatory proceedings. The ultimate dispositions of these proceedings are not presently determinable; however, it is the opinion of management that no litigation or regulatory proceeding to which the Company is currently subject will have a material adverse impact on its financial position or results of operations. The Company maintains liability insurance for various risks associated with the operation of its natural gas pipelines and facilities. In connection with these liability insurance policies, the Company has been responsible for an initial deductible or self-insured retention amount per incident, after which the insurance carriers would be responsible for amounts up to the policy limits. The self-insured retention amount associated with general liability claims is $1 million per incident plus payment of the first $5 million in aggregate claims above $1 million in the policy year.

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2010	Dec. 31, 2009
CONSOLIDATED BALANCE SHEETS
Common stock, par	$ 1	$ 1
Common stock, authorized	60,000,000	60,000,000
Common stock, issued	45,599,036	45,091,734
Common stock, outstanding	45,599,036	45,091,734