Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment

v3.21.2
Property, Plant and Equipment
 12 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment at September 30, 2021 and 2020 consisted of the following (in thousands):
September 30,
2021 2020
Construction equipment $ 333,966  $ 253,157 
Plants 143,172  102,392 
Land and improvements 53,415  38,647 
Mineral reserves 86,556  22,205 
Buildings 27,163  18,307 
Furniture and fixtures 6,426  5,648 
Leasehold improvements 1,230  1,135 
Total property, plant and equipment, gross 651,928  441,491 
Accumulated depreciation, depletion and amortization (250,803) (209,532)
Construction in progress 3,707  5,271 
Total property, plant and equipment, net $ 404,832  $ 237,230 
Depreciation, depletion and amortization expense related to property, plant and equipment for the fiscal years ended September 30, 2021, 2020 and 2019 was $49.5 million, $39.1 million and $30.1 million, respectively.
Mineral reserves, net of accumulated depletion, for the years ended September 30, 2021 and 2020 were $84.1 million and $20.3 million, respectively. These amounts include $2.1 million and $0.0 million of asset retirement obligation assets, net of accumulated depletion associated with active mining operations for the years ended September 30, 2021 and 2020, respectively and $2.7 million and $0.0 million of capitalized stripping costs, net of accumulated depletion associated with development stage mining operations for the fiscal years ended September 30, 2021 and 2020, respectively.