"2638 Interior view of Power House block A-7, showing reinforcing steel and pipe layout. April 25th, 1934.
2660 Looking upstream in Black Canyon, showing general view of the Power House layout, taken from the Nevada
Valve House bench. April 28th, 1934.
2634 View of Power House block No. A-7, from the lower Arizona construction unit, showing form work and pouring
arrangement. April 25th, 1934.
2629 General view of Himix and Cement Blending Plants, with unloading track and aggregate bins above.
April 17th, 1934."