A train carrying a shipment of grain has arrived at a new Port of Longview, Wash., terminal for the first time since the site opened, surviving a day of delays caused by union protesters blocking the tracks.

Authorities arrested about a dozen people who had lingered on the tracks Wednesday night. Most of the several hundred International Longshore and Warehouse Union protesters had already departed after leaders vowed to come back another day.

The shipment is the first to arrive at the new grain terminal operated by EGT. The union believes it has the right to work at the facility, but the company has hired a contractor that is staffing a workforce with other union laborers.

ILWU members first blocked a Longview-bound train earlier this summer. The latest attempted delivery came after a federal judge issued a restraining order against the union. Protesters first blocked the train in Vancouver early Wednesday morning before regrouping to halt it again in Longview.