Disclosures about Derivative Instruments and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2012

Disclosures about Derivative Instruments and Hedging Activities

Schedule of volume activity of natural gas derivatives that is expected to settle or mature each year

Year	Natural Gas Swaps (MMBTUs) (in millions)
2012	9.5
2013	1.7
2014	0.7
Total	11.9

Schedule of notional amount of forecasted debt issuances hedged in each year with LIBOR swaptions

Year		LIBOR Swaption Notional Dollar Amount (in thousands)
2013	$	754,452
2014		563,425
2015		470,625
2016		310,533
2017		80,169
Total	$	2,179,204

Schedule of fair value of derivative instruments and their effect on unaudited condensed balance sheet

	Balance Sheet Location		Fair Value
			(dollars in thousands)
Total designated as hedges under authoritative guidance related to derivatives and hedging activities
Liabilities:
Natural Gas Swaps	Other current liabilities	$	4,265
Total not designated as hedges under authoritative guidance related to derivatives and hedging activities
Assets:
Interest rate options	Other deferred charges	$	39,215

Schedule of the gains and (losses) on derivative instruments recognized in margin or deferred on the balance sheet

Effect of Derivative Instruments on the Condensed Statement of Revenues and Expenses or Balance Sheet
	Statement of Revenues and Expenses or Balance Sheet Location		Three months ended			Six months ended
			(dollars in thousands)
Designated as hedges under authoritative guidance related to derivatives and hedging activities
Natural Gas Swaps	Purchased power	$	149		$	149
Natural Gas Swaps	Purchased power		(3,095	)		(5,502	)
Natural Gas Swaps	Regulatory assets		990			990
Natural Gas Swaps	Regulatory assets		(11	)		(11	)
Natural Gas Swaps	Receivables		4,336			(5,244	)
Not designated as hedges under authoritative guidance related to derivatives and hedging activities
Interest rate options	Regulatory assets		(27,645	)		(60,785	)
Total losses on derivatives		$	(25,276	)	$	(70,403	)