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Property, Plant, and Equipment | 6 Months Ended
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Mar. 31, 2020
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | Property, Plant and Equipment Property, plant and equipment at March 31, 2020 and September 30, 2019 consisted of the following (in thousands):
|  | March 31, 2020 |  | September 30, 2019
|  | (unaudited) |  |
Construction equipment |  | $ | 247,396 |  |  | $ | 214,500 |
Plants |  | 98,460 |  |  | 92,279 |
Land and improvements |  | 40,092 |  |  | 34,365 |
Quarry reserves |  | 20,492 |  |  | 20,678 |
Buildings |  | 17,954 |  |  | 15,458 |
Furniture and fixtures |  | 5,246 |  |  | 4,864 |
Leasehold improvements |  | 1,135 |  |  | 1,135 |
Total property, plant and equipment, gross |  | 430,775 |  |  | 383,279 |
Accumulated depreciation, depletion and amortization |  | (194,221) |  |  | (177,927) |
Construction in progress |  | 3,529 |  |  | 518 |
Total property, plant and equipment, net |  | $ | 240,083 |  |  | $ | 205,870 |
Depreciation and depletion expense related to property, plant and equipment was $9.5 million and $7.3 million for the three months ended March 31, 2020 and 2019, respectively, and $18.9 million and $14.2 million for the six months ended March 31, 2020 and 2019, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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