Property, Plant and Equipment

9 Months Ended

Jun. 30, 2025

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment at June 30, 2025 and September 30, 2024 consisted of the following (in thousands):

	June 30, 2025		September 30, 2024
	(unaudited)
Construction equipment	$	755,626	$	570,044
Plants	394,522		255,214
Mineral reserves	221,095		69,334
Land and improvements	188,149		94,182
Buildings	53,984		39,838
Furniture and fixtures	9,314		8,616
Leasehold improvements	1,431		1,268
Total property, plant and equipment, gross	1,624,121		1,038,496
Accumulated depreciation, depletion and amortization	(502,329)		(426,842)
Construction in progress	25,821		18,270
Total property, plant and equipment, net	$	1,147,613	$	629,924

Depreciation, depletion and amortization expense related to property, plant and equipment was $38.2 million and $23.5 million for the three months ended June 30, 2025 and 2024, respectively, and $104.7 million and $67.6 million for the nine months ended June 30, 2025 and 2024, respectively.