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<br />.
<br />
<br />COLORADO RIVER STORAGE PROJECT
<br />NAVAJO UNIT
<br />(Continued)
<br />
<br />PROJECT FEATURES:
<br />
<br />The Navajo Dam will be an earth and rock-fill structure with a
<br />volume of 26,300,000 cubic yards, structural height 405 feet,
<br />and crest length 3, 700 feet. Storage capacity in acre-feet as
<br />follows:
<br />
<br />Conservation
<br />Inactive
<br />Dead
<br />
<br />Elev. 4,990 to 6,085
<br />Elev. 5,882 to 5,990
<br />Elev. 5,720 to 5,882
<br />
<br />Total
<br />
<br />1,036,000
<br />498,000
<br />175.000
<br />1,709,006
<br />
<br />A surcharge of 273,000 acre-feet (maximum water surface elevation
<br />6085-6101.5) in combination with a spillway discharge of 34,000
<br />cfs and an outlet works discharge of 3,600 cfs protects against the
<br />spring design flood (peak 107,000 cfs, 3D-day volume--l,037 i 700
<br />acre-feet) .
<br />
<br />HYDROLOGY:
<br />
<br />.
<br />
<br />Drainage area above dam
<br />Average annual historical runoff
<br />(Blanco, New Mexico, 1906-56)
<br />Maximum annual recorded runoff
<br />(1941 New Mexico)
<br />Minimum annual recorded runoff
<br />(1951 New Mexico)
<br />Momentary maximum discharge recorded
<br />(August 11, 1929, Blanco, New Mexico)
<br />Momentary maximum discharge estimated
<br />(October 6, 1911, Bloomfield, N.M.)
<br />Momentary minimum discharge estimated
<br />O\ugust 18, 24, 25, 1939)
<br />Inflow design flood runoff 3D-day volume
<br />Inflow design flood runoff 4-day volume
<br />(s pring flood)
<br />Inflow design flood runoff 4-day volume
<br />(fall flood)
<br />Instantaneous design peak flow (spring flood)
<br />Instantaneous design peak flow (fall flood)
<br />
<br />.
<br />
<br />-12-
<br />
<br />3,220 sq. miles
<br />
<br />1,204,000 acre-feet
<br />
<br />2,351,000 acre-feet
<br />
<br />331,000 acre-feet
<br />
<br />25, 000 cfs
<br />
<br />80, 000 cfs
<br />
<br />17 cfs
<br />1,040,000 acre-feet
<br />
<br />318, 000 acre-feet
<br />
<br />396,000 acre-feet
<br />107,000 cfs
<br />138,000 cfs
<br />
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