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Plant, Property and Equipment, Net
12 Months Ended
Dec. 31, 2019
Plant, Property and Equipment, Net  
Plant, Property and Equipment, Net

5. Property, Plant and Equipment

Property, plant and equipment consist of the following:

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​

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​

​

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​

​

​

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December 31, 

​

    

2019

    

2018

​

​

(in millions)

Distribution facilities

​

$

1,780.7

​

$

1,543.3

Customer premise equipment

​

 

460.1

​

 

440.4

Head-end equipment

​

 

341.2

​

 

321.9

Telephony infrastructure

​

 

97.9

​

 

94.8

Computer equipment and software

​

 

146.4

​

 

129.1

Vehicles

​

 

37.0

​

 

36.5

Buildings and leasehold improvements

​

 

49.5

​

 

46.3

Office and technical equipment

​

 

33.5

​

 

32.7

Land

​

 

6.2

​

 

6.2

Construction in progress (including material inventory and other)

​

 

61.2

​

 

157.8

Total property, plant and equipment

​

 

3,013.7

​

 

2,809.0

Less accumulated depreciation

​

 

(1,940.0)

​

 

(1,755.6)

​

​

$

1,073.7

​

$

1,053.4

​

Depreciation expense for the years ended December 31, 2019, 2018 and 2017 was $204.4 million, $185.1 million, and $196.2 million, respectively. Included in the loss (gain) on sale of assets were write-offs of obsolete assets of $2.4 million, $0.6 million, and $0.6 million for the years ended December 31, 2019, 2018 and 2017, respectively.