Electric Plant and Depreciation

3 Months Ended

Mar. 31, 2019

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)	March 31, 2019			December 31, 2018
Electric plant:
Transmission plant	$	1,794,442		$	1,794,438
Distribution plant		151,698			151,698
General plant		3,210			3,023
Total plant in service		1,949,350			1,949,159
Construction work in progress		77,568			66,121
Total electric plant		2,026,918			2,015,280
Accumulated depreciation		(212,334	)		(203,963	)
Electric plant, net	$	1,814,584		$	1,811,317

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 $28.2 million and $28.5 million as of March 31, 2019 and December 31, 2018, respectively.