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Property and Equipment
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Property and Equipment
7.
Property and Equipment

Property and equipment are summarized as follows (amounts in thousands):
 
As of December 31,
 
2018
 
2017
Construction equipment
$
126,082

 
$
118,868

Transportation equipment
18,548

 
17,511

Buildings
9,770

 
9,577

Office equipment
2,711

 
3,339

Leasehold Improvement
914

 
914

Construction in progress
388

 
258

Land
2,720

 
2,348

Water rights

 
200

 
161,133

 
153,015

Less accumulated depreciation
(109,134
)
 
(98,609
)
 
$
51,999

 
$
54,406



Assets Sold

During the year ended December 31, 2017, we sold an office, equipment shop and yard facility, located in Texas. The property had a net book value of $4.1 million, and we received $3.0 million, after selling costs, resulting in a loss of $1.1 million in “Other operating expense, net”.