Keywords: Melvin Price Locks and Dam.jpg Aerial view of the Melvin Price Locks and Dam East Alton Illinois USA with explanatory labels This is a photograph of an interpretive poster at the museum located on site The United States Army Corps of Engineers produced the poster; hence it is not subject to copyright restrictions I took the photograph of the poster 2006-05 Daderot Public domain original work of the US Federal Government PD-USGov Aerial photographs of Illinois Dams of the Mississippi River |