v3.26.1
Property, Plant and Equipment
 3 Months Ended
Jun. 30, 2026
Property, Plant, and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Our property, plant and equipment consists of the following at the dates indicated:
DescriptionEstimated
Useful Lives		June 30, 2026March 31, 2026
(in years)(in thousands)
Water treatment facilities and equipment (1)3-30$2,445,479 $2,418,731 
Pipeline and related facilities30-40266,324 266,324 
Crude oil tanks and related equipment2-30235,107 234,217 
Buildings and leasehold improvements3-40125,978 124,783 
Natural gas liquids terminal and storage assets2-30101,723 100,404 
Land64,610 64,610 
Tank bottoms and linefill (2) 37,551 37,551 
Information technology equipment3-732,547 31,762 
Vehicles (3)3-2523,499 23,734 
Other3-2019,360 19,360 
Construction in progress111,356 42,557 
Gross property, plant and equipment3,463,534 3,364,033 
Accumulated depreciation(1,312,835)(1,272,286)
Net property, plant and equipment$2,150,699 $2,091,747 
(1)    Includes finance leases right-of-use assets of $10.3 million and $8.6 million at June 30, 2026 and March 31, 2026, respectively. Accumulated amortization related to these finance leases is included within accumulated depreciation.
(2)    Tank bottoms, which are product volumes required for the operation of storage tanks, are recorded at historical cost. We recover tank bottoms when the storage tanks are removed from service. Linefill, which represents our portion of the product volume required for the operation of the proportionate share of a pipeline we own, is recorded at historical cost.
(3)    Includes finance leases right-of-use assets of $0.5 million and $0.2 million at June 30, 2026 and March 31, 2026, respectively. Accumulated amortization related to these finance leases is included within accumulated depreciation.

The following table summarizes depreciation expense and capitalized interest expense for the periods indicated:
Three Months Ended June 30,
20262025
(in thousands)
Depreciation expense$48,497 $53,417 
Capitalized interest expense$591 $84 

We record (gains) losses from the sales of property, plant and equipment and any write-downs in value due to impairment within loss (gain) on disposal or impairment of assets, net in our unaudited condensed consolidated statements of operations. The following table summarizes (gains) losses on the disposal or impairment of property, plant and equipment by segment for the period indicated:
Three Months Ended
June 30, 2026
(in thousands)
Water Solutions$1,888 
Crude Oil Logistics117 
Liquids Logistics(13)
Corporate and Other(8)
Total$1,984