Plank Hill is a local landmark between the East Hill and Third Ward neighborhoods of Eau Claire, Wisconsin and borders Putnam Park. It is near the corner of Jefferson Street and Harding Avenue. Though not specifically named on any signs nearby, it is referred to as Plank Hill by long-time residents because the up-bound lane used to be lined with planks.Plank hill was restructured so that the horses didn't have to walk through sand but then they turned the sand into planks and then the horses did not have to walk through sand.'