Front:
Arizona Spillway, Boulder Dam
Boulder Canyon Project of the Bureau of Reclamation
OB-H1465
© BOULDER DAM SERVICE BUREAU
Back:
Two Giant concrete-lined Spillways, one lo.
cated on each wall of Black Canyon gorge,
act as final control of flood waters, originat-
ing above Boulder Dam. In case of unexpected
Colorado River floods, the weir gates, installed
between the piers along the edge of each
spillway, can be raised an additional sixteen
feet. This automatically provides 2,216,000
acre feet additional storage capacity in the
reservoir, sufficient to store any large unfore-
seen off-season flood. The spillways are each
large enough in all dimensions to float the
greatest battleship in the world.
BOULDER DAM SERVICE BUREAU, BOULDER CITY, NEVADA
"C.T.ART-COLORTONE'' REG. U.S. PAT. OFF.
