Property, Plant and Equipment (Tables)

6 Months Ended

Mar. 31, 2025

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Property, plant and equipment at March 31, 2025 and September 30, 2024 consisted of the following (in thousands):

	March 31, 2025		September 30, 2024
	(unaudited)
Construction equipment	$	707,351	$	570,044
Plants	378,462		255,214
Mineral reserves	220,915		69,334
Land and improvements	181,416		94,182
Buildings	46,822		39,838
Furniture and fixtures	8,780		8,616
Leasehold improvements	1,431		1,268
Total property, plant and equipment, gross	1,545,177		1,038,496
Accumulated depreciation, depletion and amortization	(478,255)		(426,842)
Construction in progress	36,470		18,270
Total property, plant and equipment, net	$	1,103,392	$	629,924