The Ohio River Navigation Charts by US Army Corps of Engineers, Pittsburgh District from January 1971 are a valuable resource for navigating the Ohio River in the United States. These charts, which were not modified, provide detailed information on the river's course, landmarks, and navigation aids, making them a useful tool for recreational boaters, fishermen, and commercial operators alike. With the US Army Corps of Engineers ensuring their accuracy and reliability, these charts offer a glimpse into the history and geography of the Ohio River in the United States. See pics for condition, contents, colors and details.