Front:
DIVERSION TUNNEL, BOULDER DAM
5 A-H1414
Back:
Diversion Tunnel, Boulder Dam, one of the four
50 ft. tunnels used to divert the water of the
Colorado River around the Dam Site, while the
dam was under construction.
BOULDER DARI SERVICE BUREAU, BOULDER CITY, NEVADA
*C. T. PHOTO-COLORIT”
