FLOOD10355

• County: Statewide
• Stream Name: Colorado River
• Title: Colorado River Basin Probable Maximum Floods, Hoover and Glen Canyon Dams
• Date: 9/1/1990
• Prepared By: US Department of the Interior Bureau of Reclaimation
• Floodplain - Doc Type: Floodplain Report/Masterplan

APRIL

MAY

JUNE

JULY

AUGUST

Peak Flow = 300,000 cfs
5-Month Volume = 33,200,000 acre-feet

200000

~ 180000
U
u.i 1 60000
C)
~ 140000
I
~ 120000

~ 1 00000
--l
~ 80000
z
~ 60000
z
<( 40000
w
~ 20000

o

Figure 1 .2 - Hoover Dam Original Inflow Design Flood

4. The Colorado River and Its Proposed Development - The Boulder
Canyon Project, by Daniel W. Mead, March 11, 1929.

This report discusses the basin and its associated hydrology, as
well as other facets of basin development. The advantages and
disadvantages of the Boulder Canyon Project are discussed in some
detail. The writer was unable to reach any definite conclusion as
to whether or not the project is the best solution for the
development of the lower Colorado River. He states that many of
the water problems would be solved, but the project may never pay
for itself.

1.5.2 Glen Canyon Dam

1. Cooperative Studies Report No.9, Maximum Possible Flood-
Producing Meteorological Conditions: (1) Colorado River Basin
above Glen Canyon Dam Site, (2) Colorado River Basin above
Bridge Canyon Dam Site, (3) San Juan River above Bluff Dam Site,
and (4) Little Colorado River above Coconino Dam Site, by the
U.S. Weather Bureau, June 1949.

This study surveyed major storms which produced large rainfall
depths over areas of 10,000 square miles or larger. A final
estimate of the maximum possible rainfall and its seasonal variation
in the Colorado River basin for the Glen Canyon, Bridge Canyon,
Bluff, and Coconino dam sites was presented. The Bridge Canyon Dam
site is located on the Colorado River between Glen Canyon and Hoover
Dams.

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