The 16.0 version of RiverCAD is provided as a free download on our website. The actual developer of the program is BOSS International, Inc. Acad.exe is the common file name to indicate the RiverCAD installer. The most popular version of the program 16.0. RiverCAD lies within Photo & Graphics Tools, more precisely 3D Design.
From the developer:
RiverCAD ® is a sophisticated river modeling software that completely supports HEC-RAS and HEC-2 within AutoCAD. RiverCAD makes it extremely easy to compute water surface profiles for modeling bridges, culverts, spillways, levees, bridge scour, floodway delineation, flood plain reclamation, stream diversions, stream restorations, stream realignments, channel improvements, and split flows.
You may want to check out more software, such as P-CAD 2004 Viewer, Baldor Electronic Catalog or headus UVLayout, which might be related to RiverCAD.