Property, Plant And Equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

PROPERTY, PLANT AND EQUIPMENT

Net Utility Property

Net utility property consisted of the following as of December 31 (dollars in thousands):

	2018		2017
Utility plant in service	$	6,209,968	$	5,853,308
Construction work in progress	160,598		157,839
Total	6,370,566		6,011,147
Less: Accumulated depreciation and amortization	1,721,636		1,612,337
Total net utility property	$	4,648,930	$	4,398,810

Gross Property, Plant and Equipment

The gross balances of the major classifications of property, plant and equipment are detailed in the following table as of December 31 (dollars in thousands):

	2018		2017
Avista Utilities:
Electric production	$	1,426,961	$	1,392,017
Electric transmission	761,156		726,240
Electric distribution	1,726,410		1,617,451
Electric construction work-in-progress (CWIP) and other	341,041		322,144
Electric total	4,255,568		4,057,852
Natural gas underground storage	48,549		46,233
Natural gas distribution	1,118,720		1,027,197
Natural gas CWIP and other	76,488		63,803
Natural gas total	1,243,757		1,137,233
Common plant (including CWIP)	641,465		588,833
Total Avista Utilities	6,140,790		5,783,918
AEL&P:
Electric production	99,803		97,883
Electric transmission	21,347		21,413
Electric distribution	22,374		21,061
Electric production held under long-term capital lease	71,007		71,007
Electric CWIP and other	7,072		7,341
Electric total	221,603		218,705
Common plant	8,173		8,524
Total AEL&P	229,776		227,229
Total gross utility property	6,370,566		6,011,147
Other (1)	39,145		36,783
Total	$	6,409,711	$	6,047,930

(1) Included in other property and investments-net and other non-current assets on the Consolidated Balance Sheets. Accumulated depreciation was $12.4 million as of December 31, 2018 and $11.6 million as of December 31, 2017 for the other businesses.