Unused / unissued material - no paperwork - dates unclear or unknown.
Flash frame French title reads: "Boulder Dam, Colorado. La construction d'un barrage qui sera le plus grand du monde."
Boulder Dam, Colorado, United States of America (USA).
High angle views of the massive...
Mighty explosions in the Boulder Canyon, Colorado begins work on the Hoover Dam.
Construction and opening of Boulder Dam across Colorado River.
President Franklin D. Roosevelt opens the impressive Boulder Dam on the Colorado river.
Good shots of men working on the construction of Boulder Dam, United States of America.
Construction work on the enormous Boulder Dam in Colorado, United States of America.
Animated diagrams and live footage illustrate the plans for a new ship canal across France.
The sluices of Nevada's Boulder Dam are opened to mark the Anniversary of its opening.