 Products of the Marion Steam Shovel Company (later Marion Power Shovel) were used by contractors to build the Panama Canal, the Hoover Dam, and dug the Holland Tunnel under the Hudson River.In 1911, 80% of the nation's steam shovel and heavy-duty earth moving equipment was manufactured in Marion, Ohio.NASA contracted with Marion Power Shovel to manufacture the crawler-transporters that moved the assembled Saturn V rockets (used for Project Apollo) to the launch pad.