The files below are provided for public use and are developed from hydrographic sounding data obtained during regular Corps of Engineers surveys of the Allegheny, Monongahela and Ohio riverbeds. The Corps uses this data for various purposes, including determining if dredging is necessary to maintain the navigation channel.
The sounding data is reduced to a group of points located in x, y and z axes. Users with GIS or survey software should be able to import and use the files easily. The files are continuously updated with the results of the latest hydrographic surveys.