Property, Plant and Equipment

3 Months Ended

Mar. 31, 2022

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	2022		2021		2021
NW Natural:
NGD plant in service	$	3,740,105	$	3,594,226	$	3,721,939
NGD work in progress	156,575		70,766		135,398
Less: Accumulated depreciation	1,108,930		1,067,502		1,098,715
NGD plant, net	2,787,750		2,597,490		2,758,622
Other plant in service	69,333		66,314		69,332
Other construction work in progress	5,037		5,125		4,971
Less: Accumulated depreciation	20,907		19,889		20,646
Other plant, net	53,463		51,550		53,657
Total property, plant, and equipment, net	$	2,841,213	$	2,649,040	$	2,812,279
Other (NW Holdings):
Other plant in service	$	70,844	$	51,852	$	65,603
Less: Accumulated depreciation	7,301		4,512		6,512
Other plant, net	$	63,543	$	47,340	$	59,091
NW Holdings:
Total property, plant, and equipment, net	$	2,904,756	$	2,696,380	$	2,871,370
NW Natural:
Capital expenditures in accrued liabilities	$	45,964	$	20,969	$	37,537
NW Holdings:
Capital expenditures in accrued liabilities	$	47,797	$	21,118	$	38,333

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.