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PROPERTY, PLANT AND EQUIPMENT
12 Months Ended
Apr. 30, 2012
PROPERTY, PLANT AND EQUIPMENT  
PROPERTY, PLANT AND EQUIPMENT

5.                                      PROPERTY, PLANT AND EQUIPMENT

 

Property, plant and equipment at April 30, 2012 and 2011 consists of the following:

 

 

 

April 30,

 

 

 

2012

 

2011

 

Land

 

$

21,100

 

$

20,691

 

Landfills

 

445,812

 

420,875

 

Landfill operating lease contracts

 

103,103

 

96,487

 

Buildings and improvements

 

123,104

 

119,191

 

Machinery and equipment

 

118,278

 

227,556

 

Rolling stock

 

125,100

 

123,444

 

Containers

 

73,426

 

69,161

 

 

 

1,009,923

 

1,077,405

 

Less: accumulated depreciation and amortization

 

593,206

 

624,044

 

 

 

$

416,717

 

$

453,361

 

 

Depreciation expense for the fiscal years ended April 30, 2012, 2011 and 2010 was $37,990, $36,079 and $37,959, respectively. Landfill amortization expense for the fiscal years ended April 30, 2012, 2011 and 2010 was $19,957, $21,342 and $24,906, respectively. Depletion expense on landfill operating lease contracts for the fiscal years ended April 30, 2012, 2011 and 2010 was $8,482, $7,878 and $6,867, respectively, and was recorded in cost of operations.