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Electric Plant and Depreciation
 9 Months Ended
Sep. 30, 2018
Public Utilities Property Plant And Equipment [Abstract]  
Electric Plant and Depreciation

5.

Electric Plant and Depreciation

The major classes of electric plant are as follows:

 

 

 

 

 

(In thousands)

 

September 30, 2018

 

 

December 31, 2017

 

Electric plant:

 

 

 

 

 

 

 

 

Transmission plant

 

$

1,784,175

 

 

$

1,685,466

 

Distribution plant

 

 

151,458

 

 

 

143,865

 

General plant

 

 

3,023

 

 

 

3,023

 

Total plant in service

 

 

1,938,656

 

 

 

1,832,354

 

Construction work in progress

 

 

60,027

 

 

 

113,643

 

Total electric plant

 

 

1,998,683

 

 

 

1,945,997

 

Accumulated depreciation

 

 

(198,166

)

 

 

(173,768

)

Electric plant, net

 

$

1,800,517

 

 

$

1,772,229

 

 

General plant consists primarily of a warehouse, buildings and associated assets. Construction work in progress (CWIP) reflects the regulated asset projects in various stages of construction prior to being placed in service. The capitalized amounts of CWIP consist primarily of route development expenditures, labor and materials expenditures, right of way acquisitions, engineering services and legal fees. Electric plant, net includes plant acquisition adjustments of $28.6 million and $29.4 million as of September 30, 2018 and December 31, 2017, respectively.