PROPERTY, PLANT AND EQUIPMENT

3 Months Ended

Mar. 31, 2022

Property, Plant and Equipment [Abstract]

Property, plant and equipment are carried at cost or fair market value at the date of acquisition less accumulated depreciation. The cost basis of constructed assets includes materials, labor, and other direct costs. Major improvements or betterment are capitalized, while repairs that do not improve the life of the respective assets are expensed as incurred. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets as follows:


			Estimated Useful Life
Buildings			30 years
Gathering, processing and transmission systems and facilities			20 years
Furniture and fixtures			7 years
Vehicles			5 years
Computer hardware and software			3 years

Property, plant and equipment, at carrying value, is as follows:


	March 31,		December 31,
	2022		2021

	(In thousands)
Gathering, processing and transmission systems and facilities	$	2,770,137	$	2,121,434
Vehicles	7,055		6,090
Computers and equipment	4,492		4,271
Less: accumulated depreciation	(367,629)		(337,030)
Total depreciable assets, net	2,414,055		1,794,765
Construction in progress	44,142		24,888
Land	19,747		19,626
Total property, plant and equipment, net	$	2,477,944	$	1,839,279

The cost of property classified as “Construction in progress” is excluded from capitalized costs being depreciated. These amounts represent property that is not yet available to be placed into productive service as of the respective reporting date. The Company recorded $30.8 million and $25.6 million of depreciation expense for the three months ended March 31, 2022 and 2021, respectively.