Property, Plant, and Equipment

9 Months Ended

Jun. 30, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment at June 30, 2022 and September 30, 2021 consisted of the following (in thousands):

	June 30, 2022		September 30, 2021
	(unaudited)
Construction equipment	$	380,834	$	333,966
Plants	153,291		143,172
Mineral reserves	90,067		86,556
Land and improvements	58,928		53,415
Buildings	29,948		27,163
Furniture and fixtures	6,940		6,426
Leasehold improvements	1,230		1,230
Total property, plant and equipment, gross	721,238		651,928
Accumulated depreciation, depletion and amortization	(291,578)		(250,803)
Construction in progress	24,313		3,707
Total property, plant and equipment, net	$	453,973	$	404,832

Depreciation, depletion and amortization expense related to property, plant and equipment was $17.6 million and $12.4 million for the three months ended June 30, 2022 and 2021, respectively, and $50.4 million and $35.6 million for the nine months ended June 30, 2022 and 2021, respectively.