XML 54 R33.htm IDEA: XBRL DOCUMENT v3.22.4

Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment at December 31 consisted of the following (dollars in thousands):

		2022						2021						Lives (in years)
Electric Utilities		Property, Plant and Equipment				Weighted Average Useful Life (in years)		Property, Plant and Equipment				Weighted Average Useful Life (in years)		Minimum		Maximum
Electric plant:
Production		$	1,482,081			41		$	1,452,055			41		32		46
Electric transmission			632,872			48			546,126			49		40		51
Electric distribution			1,082,535			47			1,000,619			47		45		50
Integrated Generation			713,519			31			720,490			30		19		38
Plant acquisition adjustment (a)			4,870			32			4,870			32		32		32
General			274,857			27			266,935			28		24		31
Total electric plant in service			4,190,734						3,991,095
Construction work in progress			152,953						181,451
Total electric plant			4,343,687						4,172,546
Less accumulated depreciation and depletion			(1,104,056	)					(1,016,738	)
Electric plant net of accumulated depreciation and depletion		$	3,239,631					$	3,155,808

____________________

(a) The plant acquisition adjustment is included in rate base and is being recovered with 8 years remaining.

		2022						2021						Lives (in years)
Gas Utilities		Property, Plant and Equipment				Weighted Average Useful Life (in years)		Property, Plant and Equipment				Weighted Average Useful Life (in years)		Minimum		Maximum
Gas plant:
Production		$	17,843			45		$	14,841			40		24		47
Gas transmission			695,345			58			645,550			58		32		72
Gas distribution			2,620,174			57			2,394,352			53		48		60
Cushion gas - depreciable (a)			—			N/A			3,539			28		N/A		N/A
Cushion gas - not depreciable (a)			63,137			N/A			42,478			N/A		N/A		N/A
Storage			65,781			41			56,289			38		36		48
General			497,407			23			474,964			21		3		25
Total gas plant in service			3,959,687						3,632,013
Construction work in progress			52,041						37,860
Total gas plant			4,011,728						3,669,873
Less accumulated depreciation			(471,013	)					(389,115	)
Gas plant net of accumulated depreciation		$	3,540,715					$	3,280,758

____________________

(a) Depreciation of Cushion Gas is determined by the respective regulatory jurisdiction in which the Cushion Gas resides. In 2022, assets classified as Cushion gas - depreciable were fully depreciated and removed from gross plant in service and accumulated depreciation.

		2022						2021						Lives (in years)
Corporate		Property, Plant and Equipment				Weighted Average Useful Life (in years)		Property, Plant and Equipment				Weighted Average Useful Life (in years)		Minimum		Maximum
Total plant in service		$	5,685			11		$	5,694			10		4		24
Construction work in progress			13,690						8,460
Total gross property, plant and equipment			19,375						14,154
Less accumulated depreciation			(1,773	)					(1,544	)
Total net of accumulated depreciation		$	17,602					$	12,610

X

- References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration