Property and equipment consist of the following:


	Estimated useful lives (in years)	June 30,		December 31,
($ in thousands)		2024		2023
Land	N/A	$	30,428	$	29,384
Field services equipment	2-10	2,760,182		2,520,336
Vehicles	4-7	62,868		63,423
Lease equipment	10	143,117		138,781
Buildings and facilities	5-30	163,652		149,876
Mineral reserves	>25	80,323		76,823
Office equipment and furniture	2-7	12,591		11,836
		3,253,161		2,990,459
Less accumulated depreciation and depletion		(1,718,390)		(1,501,685)
		1,534,771		1,488,774
Construction in-progress	N/A	216,206		156,594
Property and equipment, net		$	1,750,977	$	1,645,368

During the three months ended June 30, 2024 and 2023, the Company recognized depreciation expense of $110.0 million and $92.9 million, respectively. During the six months ended June 30, 2024 and 2023, the Company recognized depreciation expense of $220.9 million and $181.4 million, respectively. Depletion expense for the three months ended June 30, 2024 and 2023 was $0.3 million. Depletion expense for the six months ended June 30, 2024 and 2023 was $0.6 million.

As of June 30, 2024 and December 31, 2023, the Company concluded that no triggering events that could indicate possible impairment of property and equipment had occurred, other than related to the assets held for sale discussed below.

As of June 30, 2024, the Company classified $1.2 million of land and $2.8 million of buildings, net of accumulated depreciation, of two properties that it intends to sell within the next year, and that meet the held for sale criteria, to assets held for sale, included in prepaid and other current assets in the accompanying unaudited condensed consolidated balance sheet. The Company estimates that the carrying value of the assets is equal to the fair value less the estimated costs to sell, net of write-downs taken in the prior period, and therefore no gain or loss was recorded during the six months ended June 30, 2024.

Additionally, as of December 31, 2023, the Company classified $0.7 million of land and $0.8 million of buildings, net of accumulated depreciation, of one property that it intends to sell within the next year, and that meets the held for sale criteria, as assets held for sale, included in prepaid and other current assets in the accompanying unaudited condensed consolidated balance sheet.

As of June 30, 2023, the Company classified $0.7 million of land and $0.8 million of buildings, net of accumulated depreciation, of one property as assets held for sale. The Company estimated that carrying value of the assets was equal to the fair value less the estimated costs to sell, net of write-downs taken in the prior period ended March 31, 2023, and therefore no gain or loss was recorded during the six months ended June 30, 2023.