Property, Plant, and Equipment (Tables)

9 Months Ended

Sep. 30, 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:

thousands	Estimated Useful Life	September 30,   2019		December 31,   2018
Land	n/a	$	9,160	$	5,298
Gathering systems – pipelines	30 years	5,031,293		4,764,099
Gathering systems – compressors	15 years	1,870,538		1,712,939
Processing complexes and treating facilities	25 years	2,959,307		2,844,337
Transportation pipeline and equipment	6 to 45 years	172,808		172,558
Produced-water disposal systems	20 years	721,414		629,946
Assets under construction	n/a	733,888		604,265
Other	3 to 40 years	611,515		525,331
Total property, plant, and equipment		12,109,923		11,258,773
Less accumulated depreciation		3,176,089		2,848,420
Net property, plant, and equipment		$	8,933,834	$	8,410,353