Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment

v3.22.2.2
Property, Plant and Equipment
 12 Months Ended
Sep. 30, 2022
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment at September 30, 2022 and 2021 consisted of the following (in thousands):
September 30,
2022 2021
Construction equipment $ 402,581  $ 333,966 
Plants 167,625  143,172 
Land and improvements 59,454  53,415 
Mineral reserves 91,992  86,556 
Buildings 32,566  27,163 
Furniture and fixtures 7,110  6,426 
Leasehold improvements 1,230  1,230 
Total property, plant and equipment, gross 762,558  651,928 
Accumulated depreciation, depletion and amortization (304,935) (250,803)
Construction in progress 23,789  3,707 
Total property, plant and equipment, net $ 481,412  $ 404,832 
Depreciation, depletion and amortization expense related to property, plant and equipment for the fiscal years ended September 30, 2022, 2021 and 2020 was $68.9 million, $49.5 million and $39.1 million, respectively.
Mineral reserves, net of accumulated depletion, for the years ended September 30, 2022 and 2021 were $87.6 million and $84.1 million, respectively. These amounts include $2.0 million and $2.1 million of asset retirement obligation assets, net of accumulated depletion associated with active mining operations for the years ended September 30, 2022 and 2021, respectively and $3.9 million and $2.7 million of capitalized stripping costs, net of accumulated depletion associated with development stage mining operations for the fiscal years ended September 30, 2022 and 2021, respectively.