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Property, plant and equipment (Tables)
12 Months Ended
Dec. 31, 2022
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment
Property, plant and equipment consist of the following:
2022
 CostAccumulated depreciationNet book value
Renewable generation facilities$4,119,514 $1,016,784 $3,102,730 
Utility plant8,640,224 990,975 7,649,249 
Land113,153  113,153 
Equipment111,707 50,904 60,803 
Construction in progress
Generation196,287  196,287 
Distribution and transmission822,663  822,663 
$14,003,548 $2,058,663 $11,944,885 
5.Property, plant and equipment (continued)
2021
 CostAccumulated depreciationNet book value
Renewable generation facilities$4,187,197 $751,219 $3,435,978 
Utility plant7,468,236 780,537 6,687,699 
Land114,821 — 114,821 
Equipment101,971 56,464 45,507 
Construction in progress
Generation148,302 — 148,302 
Distribution and transmission610,139 — 610,139 
$12,630,666 $1,588,220 $11,042,446 
Schedule of Capitalization of Interest
Interest and AFUDC capitalized to the cost of the assets in 2022 and 2021 are as follows:
20222021
Interest capitalized on non-regulated property$4,762 $3,313 
AFUDC capitalized on regulated property:
Allowance for borrowed funds6,040 3,208 
Allowance for equity funds1,901 829 
$12,703 $7,350