Property, Plant, and Equipment (Tables)

6 Months Ended

Jun. 30, 2021

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	June 30, 2021		December 31, 2020
Land	N/A	$	10,955	$	9,696
Gathering systems – pipelines	30 years	5,318,588		5,231,212
Gathering systems – compressors	15 years	2,141,652		2,096,905
Processing complexes and treating facilities	25 years	3,362,779		3,424,368
Transportation pipeline and equipment	6 to 45 years	168,205		168,205
Produced-water disposal systems	20 years	863,583		831,719
Assets under construction	N/A	88,280		176,834
Other	3 to 40 years	723,285		702,806
Total property, plant, and equipment		12,677,327		12,641,745
Less accumulated depreciation		4,087,362		3,931,800
Net property, plant, and equipment		$	8,589,965	$	8,709,945