Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies (Tables)

v3.10.0.1
Significant Accounting Policies (Tables)
12 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]  
Schedule of customer concentration risk
Two customers accounted for more than 10% of consolidated revenues for the fiscal years ended September 30, 2018 and September 30, 2017, as follows:
 
 
% of Consolidated
Revenues
for the Fiscal
Year Ended September 30,
 
 
2018
 
2017
Alabama Department of Transportation
 
15.1
%
 
14.9
%
North Carolina Department of Transportation
 
13.3
%
 
13.9
%
Schedule of useful lives of property, plant and equipment
The useful lives of property, plant and equipment categories are as follows:
Category
Estimated Useful Life
Land and improvements
Land, unlimited; improvements, 15-25 years
Quarry reserves
Based on depletion
Buildings
5 - 39 years
Asphalt 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, 2018 and September 30, 2017 consisted of the following (in thousands):

 
September 30,

 
2018
 
2017
Construction equipment
 
$
190,420

 
$
154,911

Asphalt plants
 
79,563

 
66,379

Land and improvements
 
29,624

 
20,991

Quarry reserves
 
20,908

 
7,219

Buildings
 
12,416

 
9,848

Furniture and fixtures
 
4,422

 
3,870

Leasehold improvements
 
765

 
765

Total property, plant and equipment, gross
 
338,118

 
263,983

Accumulated depreciation, depletion and amortization
 
(160,795
)
 
(148,072
)
Construction in progress
 
1,369

 

Total property, plant and equipment, net
 
$
178,692

 
$
115,911