PROPERTY, PLANT AND EQUIPMENT AND JOINTLY-OWNED PROJECTS:

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Disclosure

PROPERTY, PLANT AND EQUIPMENT AND JOINTLY-OWNED PROJECTS

The following table presents the major classifications of Idaho Power’s utility plant in service, annual depreciation provisions as a percent of average depreciable balance, and accumulated provision for depreciation for the years ended December 31, 2023 and 2022 (in thousands of dollars):


	2023				2022
	Balance		Avg Rate		Balance		Avg Rate
Production	$	2,794,534	3.50	%	$	2,700,494	2.89	%
Transmission	1,392,338		1.90	%	1,346,463		1.91	%
Distribution	2,454,458		2.18	%	2,192,135		2.15	%
General and Other	650,202		5.21	%	589,375		5.36	%
Total in service	7,291,532		2.89	%	6,828,467		2.66	%
Accumulated provision for depreciation	(2,557,744)				(2,465,279)
In service - net	$	4,733,788			$	4,363,188

At December 31, 2023, Idaho Power's construction work in progress balance of $985.5 million included relicensing costs of $459.8 million for the HCC, Idaho Power's largest hydropower complex. In 2023, 2022, and 2021, Idaho Power had IPUC authorization to include in its Idaho jurisdiction rates $6.5 million annually ($8.8 million when grossed-up for the effect of income taxes) of AFUDC relating to the HCC relicensing project. Collecting these amounts will reduce the amount collected in the future once the HCC relicensing costs are approved for recovery in base rates. At December 31, 2023, Idaho Power's regulatory liability for collection of AFUDC relating to the HCC was $228.7 million.

Idaho Power's ownership interest in two jointly-owned generating facilities is included in the table above. Under the joint operating agreements for these facilities, each participating utility is responsible for financing its share of construction, operating, and leasing costs. Idaho Power's proportionate share of operating expenses for each facility is included in the Consolidated Statements of Income. These jointly-owned facilities, including balance sheet amounts and the extent of Idaho Power’s participation, were as follows at December 31, 2023 (in thousands of dollars):


Name of Plant	Location	Utility Plant in Service		Construction Work in Progress		Accumulated Provision for Depreciation		Ownership %	MW(1)(2)
Jim Bridger units 1-4	Rock Springs, WY	$	770,179	$	12,891	$	500,685	33	775
North Valmy unit 2(2)	Winnemucca, NV	262,544		2,237		225,147		50	145

(1) Idaho Power’s share of nameplate capacity.

(2) Pursuant to an agreement with NV Energy, Idaho Power's participation in coal-fired operations of North Valmy ended in December 2019 at unit 1 and is planned to end no later than the end of 2025 at unit 2.

IERCo, Idaho Power’s wholly-owned subsidiary, is a joint-owner of BCC. Idaho Power’s coal purchases from BCC were $67.9 million in 2023, $60.4 million in 2022, and $59.7 million in 2021.