Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment (Tables)

v3.23.3
Property, Plant and Equipment (Tables)
 12 Months Ended
Sep. 30, 2023
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, 2023 and 2022 consisted of the following (in thousands):
September 30,
2023 2022
Construction equipment $ 447,467  $ 402,581 
Plants 208,708  167,625 
Land and improvements 76,396  59,454 
Mineral reserves 69,405  91,992 
Buildings 36,885  32,566 
Furniture and fixtures 7,538  7,110 
Leasehold improvements 1,268  1,230 
Total property, plant and equipment, gross 847,667  762,558 
Accumulated depreciation, depletion and amortization (358,462) (304,935)
Construction in progress 15,890  23,789 
Total property, plant and equipment, net $ 505,095  $ 481,412