Property and Equipment, net

9 Months Ended

Jun. 30, 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	June 30, 2019		September 30, 2018
Land	—	$	54,060	$	51,490
Buildings and leasehold improvements	2-40 yrs.		40,663		36,275
Operating equipment	2-7 yrs.		203,135		186,499
Transportation vehicles	3-7 yrs.		230,746		208,371
Office equipment and software	3-10 yrs.		62,174		57,976
Construction in progress	—		6,803		4,202
Property and equipment			597,581		544,813
Less: Accumulated depreciation			319,329		288,007
Property and equipment, net		$	278,252	$	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 $20,884 and $17,839 for the three months ended June 30, 2019 and 2018, respectively. Depreciation expense related to property and equipment was $61,851 and $56,642 for the nine months ended June 30, 2019 and 2018, respectively.