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PROPERTY, PLANT AND EQUIPMENT, NET
 3 Months Ended
Mar. 31, 2024
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT, NET
4. PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, net is summarized as follows:
March 31, 2024December 31, 2023
Land, site improvements and rights$182,349 $182,319 
Buildings and improvements18,833 18,769 
Bridges and tunnels176,753 176,753 
Terminal machinery and equipment1,207,802 1,215,197 
Track and track related assets104,568 103,888 
Railroad equipment8,999 8,999 
Railcars and locomotives85,216 85,162 
Computer hardware and software19,362 16,058 
Furniture and fixtures1,887 1,887 
Construction in progress80,888 76,491 
Other21,746 21,613 
1,908,403 1,907,136 
Less: Accumulated depreciation(297,672)(276,307)
Property, plant and equipment, net$1,610,731 $1,630,829 
Depreciation expense for property, plant and equipment is summarized as follows:
Three Months Ended March 31,
20242023
Depreciation expense$18,304 $17,973