Disclosures about Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Sep. 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	1.6
2013	1.8
2014	0.9
Total	4.3

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)
Designated as hedges:
Assets:
Natural Gas Swaps	Other current assets	$	621
Liabilities:
Natural Gas Swaps	Other current liabilities	$	634
Not designated as hedges:
Assets:
Interest rate options	Other deferred charges	$	29,921

Schedule of the realized gains and (losses) on derivative instruments recognized in margin on the statement of revenues and expenses

	Statement of Revenues and Expenses Location		Three months ended			Nine months ended
			(dollars in thousands)
Designated as hedges:
Natural Gas Swaps	Purchased power	$	173		$	197
Natural Gas Swaps	Purchased power		(3,934	)		(9,204	)
Natural Gas Swaps	Fuel		1,327			1,452
Natural Gas Swaps	Fuel		(83	)		(315	)
		$	(2,517	)	$	(7,870	)

Schedule of the unrealized gains and (losses) on derivative instruments deferred on the balance sheet

	Balance Sheet Location
			(dollars in thousands)
Designated as hedges:
Natural Gas Swaps	Regulatory assets	$	621
Natural Gas Swaps	Receivables		(634	)
Total designated as hedges		$	(13	)
Not designated as hedges:
Interest rate options	Regulatory assets	$	(70,079	)