I've done it myself a few times, but the water was 6" deep and only 20 yards wide. Easy crossing,and yes it was running. And that is minimum flow, there ain't no non-flowing water there, its the only way across the creek. And the creek flow channel there is a couple hundred yards wide with evidence of 6 foot deep flowing water at high flow.
You are not going to get low slung mini-van across, any time of year. A decent pickup with clearance will easily make it---when the water is low.
These people tried to ford a raging runoff stream.