Captions: View showing a section of sheet piling in the upper cofferdam; Diversion tunnel #4 - a hole 50 ft. in dia. surrounded by 3 ft. of concrete - Hoover Dam, Oakes 229; Reclamation truck.
Captions: Trucking mammoth concrete buckets in the 50 ft. dia. tunnels at Hoover Dam, Oakes 228; The Grand Canyon bridge, Arizona [postcard]; Catwalk across Colorado [River]; Colorado [River] from lookout point;
Captions: Fallen monarch Mariposa Forest; Grizzley giant 104 Ft in circ 224 ft high 100 ft first limb 6 1/2 ft diam 1,000,000 ft lumber 8000 years old; California tree.