Front:
BLACK CANYON, BOULDER DAM SITE
5A-H1413
© BOULDER DAM SERVICE BUREAU
Back:
View looking upstream through Black Can-
yon on the Colorado River at the site of
Boulder Dam, as it appeared in the Spring
of 1931.
BOULDER DAM SERVICE BUREAU, BOULDER CITY, NEVADA
C.T.ART-COLORTONE'' REG. U.S. PAT. OFF.
