union pacific said it is expecting to incur a onetime pretax expense of about 70 million in the second quarter from the ratification of a crewstaffing union agreement the omaha nebbased railroad company said in a securities filing that the charge will raise its operating ratio for the second quarter by 120 basis points the added expense combined with lower business volumes and higher operating costs are expected to push union pacifics operation ratio for 2023 above 2022 levels the company said union pacific also said tuesday that a recent change in nebraskas state income tax rate is expected to add almost 75 million in aftertax income for the second quarter shares were half a percentage point higher at 200 in premarket trading