Seine River Steamers early vessels meant that positive traction by pulling on a chain against a deadman or anchor was much more effective. In the 1830s river travel was considered dangerous, so much so that insurers would put a 25 percent premium on cargoes and vessels travelling the route. The Seine is divided into three sections, the lower or Oise section, middle or Paris Section, and upper or Marne section. Ships enter the river at Le Havre through a bad tidal bore. (Victor Hugo's favourite daughter was killed while travelling in a small boat across the bore.) Oceangoing ships can travel to Rouen,
Course of the Willamette River the river, the main channel flows north by Sauvie Island, which is on the left and marine terminals and industrial areas, which are on the right. About from the mouth, the Columbia Slough enters from the right. Kelley Point Park is to the right at the confluence of the Willamette and the Columbia, about from the larger river's mouth on the Pacific Ocean. The elevation at the mouth is about above sea level. The reaches of the river below Willamette Falls are influenced by tidal effects from the Columbia River. Over its entire course, the main stem of the Willamette