Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment (Tables)

v3.21.2
Property, Plant and Equipment (Tables)
 12 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
The estimated useful lives of property, plant and equipment categories are as follows:
Category Estimated Useful Life
Land and improvements
Land, unlimited; improvements, 15-25 years
Mineral reserves Based on depletion
Buildings
5 - 39 years
Plants
3 - 20 years
Construction equipment
3 - 10 years
Furniture and fixtures
5 - 10 years
Leasehold improvements
The shorter of 15 years or the remaining lease term
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