Property, Plant and Equipment

3 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment at December 31, 2023 and September 30, 2023 consisted of the following (in thousands):

	December 31, 2023		September 30, 2023
	(unaudited)
Construction equipment	$	499,339	$	447,467
Plants	225,125		208,708
Land and improvements	78,275		76,396
Mineral reserves	69,405		69,405
Buildings	36,885		36,885
Furniture and fixtures	7,608		7,538
Leasehold improvements	1,268		1,268
Total property, plant and equipment, gross	917,905		847,667
Accumulated depreciation, depletion, and amortization	(374,743)		(358,462)
Construction in progress	18,499		15,890
Total property, plant and equipment, net	$	561,661	$	505,095

Depreciation, depletion, and amortization expense related to property, plant and equipment for the three months ended December 31, 2023 and 2022 was $21.0 million and $19.3 million, respectively.