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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2022
20. Property, Plant and Equipment  
Regulated and Non-Regulated Assets
PP&E consisted of the following regulated and non-regulated assets:
 
As at
December 31
December 31
millions of dollars
 
Estimated useful life
2022
2021
Generation
2
 
to
131
$
 
13,083
$
 
11,173
Transmission
10
 
to
80
 
2,731
 
2,532
Distribution
10
 
to
65
 
6,978
 
6,305
Gas transmission and distribution
13
 
to
83
 
5,061
 
4,385
General plant and other
 
(1)
2
 
to
71
 
2,723
 
2,473
Total cost
 
30,576
 
26,868
Less: Accumulated depreciation
(1)
(9,574)
(8,739)
 
21,002
 
18,129
Construction work in progress
(1)
 
1,994
 
2,224
Net book value
$
 
22,996
$
 
20,353
(1) SeaCoast owns a
50
% undivided ownership interest in a jointly owned
26
-mile pipeline lateral located in Florida, which went into
service in 2020. At December 31, 2022, SeaCoast’s share of plant in service was $
27
 
million USD (2021 - $
27
 
million USD), and
accumulated depreciation of $
1
 
million USD (2021 - $
1
 
million USD). SeaCoast’s undivided ownership interest is financed with its
funds and all operations are accounted for as if such participating interest were a wholly owned facility.
 
SeaCoast’s share of direct
expenses of the jointly owned pipeline is included in OM&G in the Consolidated Statements of Income.