Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment Table

A summary of the historical cost of property, plant, and equipment is as follows:

		December 31,
thousands	Estimated Useful Life	2019		2018
Land	n/a	$	9,495	$	5,298
Gathering systems – pipelines	30 years	5,092,004		4,764,099
Gathering systems – compressors	15 years	1,929,377		1,712,939
Processing complexes and treating facilities	25 years	3,237,801		2,844,337
Transportation pipeline and equipment	6 to 45 years	173,572		172,558
Produced-water disposal systems	20 years	754,774		629,946
Assets under construction	n/a	486,584		604,265
Other	3 to 40 years	672,064		525,331
Total property, plant, and equipment		12,355,671		11,258,773
Less accumulated depreciation		3,290,740		2,848,420
Net property, plant, and equipment		$	9,064,931	$	8,410,353