On cover: The Beginnings of the Great Expedition ..., the Eastern Legacy, From Trail Blazing to Walking on the Moon. Lists buoys, dams, and other known navigati

In 1988, the U.S. Army Corps of Engineers began an investigation of the benefits and costs of extending several locks on the lower portion of the Upper Mississi

This paper navigational chart book covers the Mississippi River from Minneapolis, MN to Cairo, IL and the Minnesota & St. Croix Rivers. U.S. Army Corps of Engin

Commemorates the 50th anniversary of the completion of a 9-foot navigational channel on the Ohio River, which was accomplished with the opening of Lock and Dams