When we had cross country at school we had to wade though the river twice, one on the way out and then again on the return. I would say at that time, at Norman chamberlain fields the river must have been about 3 ft deep. Nobody bothered then as you knew you were in for a nice hot shower at the end. Plus it was fun in those days. Some days though we used to skip the crossing and hide in the long grass all part of school.