To fulfill lumber contracts, Hamilton's crews clear as many trees as possible and maintain the water level behind the dam at maximum capacity to float them to the mill.

The closing title card reads 'Toil overcame desolation and Johnstown was rebuilt anew' just before a few shots showing citizens getting back to their lives.

Special effects supervisors Jack Smith and Roy Davidson built miniature sets that could realistically collapse under moving water.

The special effects of the film combine miniatures and sets to depict the actual historic event of flood and its aftermath, pioneering complex techniques.

"[3] The Johnstown Flood is a surviving film with a print held in the George Eastman Museum Motion Picture Collection.