Property, Plant, and Equipment

3 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment at December 31, 2021 and September 30, 2021 consisted of the following (in thousands):

	December 31, 2021		September 30, 2021
	(unaudited)
Construction equipment	$	357,051	$	333,966
Plants	149,441		143,172
Mineral reserves	86,827		86,556
Land and improvements	57,096		53,415
Buildings	27,463		27,163
Furniture and fixtures	6,539		6,426
Leasehold improvements	1,230		1,230
Total property, plant and equipment, gross	685,647		651,928
Accumulated depreciation, depletion, and amortization	(263,938)		(250,803)
Construction in progress	7,256		3,707
Total property, plant and equipment, net	$	428,965	$	404,832

Depreciation, depletion, and amortization expense related to property, plant and equipment for the three months ended December 31, 2021 and 2020 was $15.8 million and $11.0 million, respectively.