Property, Plant and Equipment

3 Months Ended

Mar. 31, 2023

Property, Plant and Equipment [Abstract]

Public Utility Property, Plant, and Equipment [Table Text Block]

The following table sets forth the major classifications of property, plant, and equipment and accumulated depreciation:

	March 31,				December 31,
In thousands	2023		2022		2022
NW Natural:
NGD plant in service	$	4,026,183	$	3,740,105	$	3,992,676
NGD construction work in progress	97,128		156,575		78,897
Less: Accumulated depreciation	1,131,256		1,108,930		1,115,690
NGD plant, net	2,992,055		2,787,750		2,955,883
Other plant in service	70,364		69,333		70,368
Other construction work in progress	6,624		5,037		6,606
Less: Accumulated depreciation	21,804		20,907		21,541
Other plant, net	55,184		53,463		55,433
Total property, plant, and equipment, net	$	3,047,239	$	2,841,213	$	3,011,316
Other (NW Holdings):
Other plant in service	$	97,286	$	58,301	$	92,979
Other construction work in progress	22,891		12,543		20,040
Less: Accumulated depreciation	11,438		7,301		9,935
Other plant, net	$	108,739	$	63,543	$	103,084
NW Holdings:
Total property, plant, and equipment, net	$	3,155,978	$	2,904,756	$	3,114,400
NW Natural:
Capital expenditures in accrued liabilities	$	17,255	$	45,964	$	24,584
NW Holdings:
Capital expenditures in accrued liabilities	$	17,730	$	47,797	$	25,318

NW Natural

Other plant balances include non-utility gas storage assets at the Mist facility and other long-lived assets not related to NGD.

NW Holdings

Other plant balances include long-lived assets associated with water and wastewater operations and non-regulated activities not held by NW Natural or its subsidiaries.