Property and Equipment, net

6 Months Ended

Mar. 31, 2019

Property Plant And Equipment [Abstract]

Property and Equipment, net

6.Property and Equipment, net

Property and equipment, net consists of the following:

	Useful Life	March 31, 2019		September 30, 2018
Land	—	$	52,696	$	51,490
Buildings and leasehold improvements	2-40 yrs.		36,873		36,275
Operating equipment	2-7 yrs.		198,948		186,499
Transportation vehicles	3-7 yrs.		222,006		208,371
Office equipment and software	3-10 yrs.		57,928		57,976
Construction in progress	—		9,893		4,202
Property and equipment			578,344		544,813
Less: Accumulated depreciation			311,676		288,007
Property and equipment, net		$	266,668	$	256,806

Construction in progress includes costs incurred for software and other assets that have not yet been placed in service. Depreciation expense related to property and equipment was $21,687 and $17,731 for the three months ended March 31, 2019 and 2018, respectively. Depreciation expense related to property and equipment was $40,968 and $38,803 for the six months ended March 31, 2019 and 2018, respectively.