PROPERTY, PLANT AND EQUIPMENT

12 Months Ended

Dec. 31, 2015

Public Utilities, Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment — net consisted of the following at December 31, 2015 and 2014:

(In thousands)	2015			2014
Property, plant and equipment
Regulated Operating Subsidiaries:
Property, plant and equipment in service	$	7,085,818		$	6,396,449
Construction work in progress	425,594			391,788
Capital equipment inventory	54,781			68,170
Other	12,550			13,151
ITC Holdings and other	18,609			15,534
Total	7,597,352			6,885,092
Less: Accumulated depreciation and amortization	(1,487,713		)	(1,388,217		)
Property, plant and equipment — net	$	6,109,639		$	5,496,875

Additions to property, plant and equipment in service and construction work in progress during 2015 and 2014 were due primarily for projects to upgrade or replace existing transmission plant to improve the reliability of our transmission systems as well as transmission infrastructure to support generator interconnections and investments that provide regional benefits such as our Multi-Value Projects.