v3.26.1
Property, Plant and Equipment
 9 Months Ended
Jun. 30, 2026
Property, Plant, and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment at June 30, 2026 and September 30, 2025 consisted of the following (in thousands):
June 30, 2026September 30, 2025
(unaudited)
Construction equipment$851,156 $766,914 
Plants479,083 413,983 
Mineral reserves201,440 201,440 
Land and improvements228,624 202,120 
Buildings69,397 54,583 
Furniture and fixtures9,658 10,209 
Leasehold improvements1,620 1,431 
      Total property, plant and equipment, gross1,840,978 1,650,680 
Accumulated depreciation, depletion and amortization(609,140)(526,370)
Construction in progress63,854 28,760 
      Total property, plant and equipment, net$1,295,692 $1,153,070 
Depreciation, depletion and amortization expense related to property, plant and equipment was $41.9 million and $38.2 million for the three months ended June 30, 2026 and 2025, respectively, and $129.1 million and $104.7 million for the nine months ended June 30, 2026 and 2025, respectively.