Property, Plant and Equipment (Tables)

6 Months Ended

Mar. 31, 2024

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Property, plant and equipment at March 31, 2024 and September 30, 2023 consisted of the following (in thousands):

	March 31, 2024		September 30, 2023
	(unaudited)
Construction equipment	$	511,111	$	447,467
Plants	233,611		208,708
Land and improvements	79,903		76,396
Mineral reserves	69,405		69,405
Buildings	36,885		36,885
Furniture and fixtures	7,775		7,538
Leasehold improvements	1,268		1,268
Total property, plant and equipment, gross	939,958		847,667
Accumulated depreciation, depletion and amortization	(391,453)		(358,462)
Construction in progress	16,846		15,890
Total property, plant and equipment, net	$	565,351	$	505,095