Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment

v3.24.3
Property, Plant and Equipment
 12 Months Ended
Sep. 30, 2024
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment at September 30, 2024 and 2023 consisted of the following (in thousands):
September 30,
2024 2023
Construction equipment $ 570,044  $ 447,467 
Plants 255,214  208,708 
Land and improvements 94,182  76,396 
Mineral reserves 69,334  69,405 
Buildings 39,838  36,885 
Furniture and fixtures 8,616  7,538 
Leasehold improvements 1,268  1,268 
Total property, plant and equipment, gross 1,038,496  847,667 
Accumulated depreciation, depletion and amortization (426,842) (358,462)
Construction in progress 18,270  15,890 
Total property, plant and equipment, net $ 629,924  $ 505,095 
Depreciation, depletion and amortization expense related to property, plant and equipment for the fiscal years ended September 30, 2024, 2023 and 2022 was $92.6 million, $80.0 million and $68.9 million, respectively.
Mineral reserves, net of accumulated depletion, as of September 30, 2024 and 2023 were $62.1 million and $63.6 million, respectively. These amounts include $1.4 million and $1.5 million of asset retirement obligation assets, net of accumulated depletion associated with active mining operations as of September 30, 2024 and 2023, respectively, and $1.7 million and $0.8 million of capitalized stripping costs, net of accumulated depletion associated with development stage mining operations as of September 30, 2024 and 2023, respectively.