REGULATORY ASSETS AND LIABILITIES (Tables)

6 Months Ended

Jun. 30, 2026

SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items]

SCHEDULE OF REGULATED ASSETS AND LIABILITIES

The tables below present a summary of regulatory assets and liabilities, net of amortization, for the periods indicated:


						June 30, 2026
						Current						Noncurrent						Total
						(Thousands of dollars)
Under-recovered purchased-gas costs						$	19,830					$	—					$	19,830
Pension and postemployment benefit costs, net						10,187						216,408						226,595
Reacquired debt costs						723						904						1,627
MGP remediation costs						1,000						29,342						30,342

WNA						32,835						—						32,835
Customer credit deferrals						12,385						1,075						13,460
Other, net						6,407						2,975						9,382
Total regulatory assets						83,367						250,704						334,071
Income tax rate changes						—						(428,331)						(428,331)
Over-recovered purchased-gas costs						(22,384)						—						(22,384)
Ad-valorem tax						(2,060)						—						(2,060)
Other						(258)						(4,804)						(5,062)
Total regulatory liabilities						(24,702)						(433,135)						(457,837)
Net regulatory assets and liabilities						$	58,665					$	(182,431)					$	(123,766)


						December 31, 2025
						Current						Noncurrent						Total
						(Thousands of dollars)
Under-recovered purchased-gas costs						$	10,692					$	—					$	10,692
Pension and postemployment benefit costs, net						10,929						221,809						232,738
Reacquired debt costs						723						1,266						1,989
MGP remediation costs						1,000						29,105						30,105

WNA						19,175						—						19,175
Customer credit deferrals						2,953						1,091						4,044
Other, net						4,032						2,954						6,986
Total regulatory assets						49,504						256,225						305,729
Income tax rate changes						—						(444,986)						(444,986)
Over-recovered purchased-gas costs						(56,876)						—						(56,876)
Ad-valorem tax						(165)						—						(165)
Other						(236)						(6,634)						(6,870)
Total regulatory liabilities						(57,277)						(451,620)						(508,897)
Net regulatory assets and liabilities						$	(7,773)					$	(195,395)					$	(203,168)