Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment

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Property, Plant and Equipment
 3 Months Ended
Dec. 31, 2024
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment at December 31, 2024 and September 30, 2024 consisted of the following (in thousands):
December 31, 2024 September 30, 2024
(unaudited)
Construction equipment $ 660,113  $ 570,044 
Plants 338,228  255,214 
Land and improvements 175,427  94,182 
Mineral reserves 220,915  69,334 
Buildings 42,233  39,838 
Furniture and fixtures 8,686  8,616 
Leasehold improvements 1,307  1,268 
      Total property, plant and equipment, gross 1,446,909  1,038,496 
Accumulated depreciation, depletion, and amortization (453,718) (426,842)
Construction in progress 37,701  18,270 
      Total property, plant and equipment, net $ 1,030,892  $ 629,924 
Depreciation, depletion, and amortization expense related to property, plant and equipment for the three months ended December 31, 2024 and 2023 was $30.3 million and $21.0 million, respectively.