Electric Plant and Depreciation

6 Months Ended

Jun. 30, 2017

Public Utilities Property Plant And Equipment [Abstract]

Electric Plant and Depreciation

3. Electric Plant and Depreciation

The major classes of electric plant are as follows:

(In thousands)	June 30, 2017			December 31, 2016
Electric plant:
Transmission plant	$	1,236,848		$	1,203,164
Distribution plant		614,174			575,648
General plant		15,958			15,959
Total plant in service		1,866,980			1,794,771
Construction work in progress		111,706			107,189
Total electric plant		1,978,686			1,901,960
Accumulated depreciation		(268,266	)		(261,140	)
Electric plant, net	$	1,710,420		$	1,640,820

General plant consists primarily of a warehouse, buildings and associated assets. Construction work in progress (CWIP) relates to various transmission and distribution projects underway. The 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 $27.2 million and $27.7 million as of June 30, 2017 and December 31, 2016, respectively.

See Note 17, Subsequent Events for information related to our proposed asset exchange transaction with Oncor.