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Property, Plant and Equipment, Net
 6 Months Ended
Jun. 30, 2017
Property, Plant and Equipment, Net.  
Property, Plant and Equipment, Net

NOTE 5. PROPERTY, PLANT AND EQUIPMENT, NET

Property, plant and equipment include the following (in millions):

 

 

 

 

 

 

 

 

 

 

    

Estimated

    

 

 

    

 

 

 

 

Useful Life

 

June 30, 

 

December 31, 

 

 

(years)

 

2017

 

2016

Machinery and equipment

 

5 - 30

 

$

2.9

 

$

3.0

Vehicles

 

3 - 5

 

 

0.8

 

 

0.2

Mechanical refrigeration units

 

30

 

 

16.0

 

 

16.0

NGL storage tanks

 

15

 

 

4.3

 

 

4.3

Workover rigs

 

5 - 20

 

 

106.1

 

 

73.8

Other property, plant and equipment

 

3 - 30

 

 

6.8

 

 

13.8

Property, plant and equipment

 

  

 

 

136.9

 

 

111.1

Less: accumulated depreciation

 

  

 

 

(16.0)

 

 

(8.7)

Property, plant and equipment, net

 

  

 

$

120.9

 

$

102.4

 

Depreciation expense was $7.3 million and $1.7 million for the six months ended June 30, 2017 and 2016, respectively. Depreciation expense was $3.8 million and $0.8 million for the three months ended June 30, 2017 and 2016, respectively.