(9:45) b/w, sound
On Works Progress Administration (WPA) dam construction. Rock and sand is removed from the site of the Grand Coulee Dam. Steel reinforcement is erected for an earth dam at Fort Peck, Montana. Shows general construction scenes at Boulder Dam, and the packet boat Mark Twain on the Mississippi. Steel reinforcements for the Bonneville Dam are set in place. Concrete is poured and spread. Obstructions are removed with dynamite.