Item No.
Requirement
Complication
g.
Hydroelectric power storage and the corre-
g.
Power can be generated at all stages
sponding reservoir surface elevations between
above elev 408.
which the storage space is reserved for power
production.
h. Irrigation storage and the corresponding reser-
h.
NI.
voir surface elevations between which the stor-
age space is reserved for irrigation.
i. Navigation storage and the corresponding reser-
i.
239,000 acre-feet, elev 408-414. (Lock
voir surface elevations between which the stor-
can be operated between elev 408-418.)
age space is reserved for low-water regulation.
j. Water supply storage and the corresponding
j.
None.
reservoir surface elevations between which the
storage space is reserved for domestic or in-
dustrial water supply.
k. Indicate here the purpose, storage volume, and
k.
Reservoir is fluctuated for malaria con-
reservoir surface elevations for any storage al-
trol a maximum of 1 foot between elev
locations in the reservoir not covered by the
409-414.
above readings.
l. Maximum gross storage volume allowable in
l.
Elev 408.
advance of floods, and the corresponding re-
servoir surface elevation. (In operating some
reservoirs during the flood season, it is cus-
tomary to keep the pool drawn down to a cer-
tain elevation to reduce flood discharge.)
m. Total storage at top of spillway gates in open
m. NI.
position as indicated in item 24 g.
n. Total storage at top of spillway gates in closed
n.
1,091,000 acre-feet at elev 418.
position as indicated in item 24 h.
o. Total storage at spillway crest as indicated in
o.
72,000 acre-feet at elev 378.
item 23b.
29
Give the reservoir surface area, length, and maximum
width along the main stream channel at as many
of the following pool elevations as possible:
Area
Length
Width
(approximately)
(channel)
(maximum.)
a.
At maximum design pool as indicated in item
a. 60,000 acres
52.7 mi
NI
28a.
b. At top of spillway gates in open position as
b.
NI
52.7 mi
NI
indicated in item 24g.
c. At top of spillway gates in closed position as
c.
46,800 acres
52.7 mi
NI
indicated in item 24h.
d. At spillway crest as indicated in item 23 b.
d.
5,500 acres
52.7 mi
NI
e. At maximum operating pool as indicated in
e.
46,800 acres
52.7 mi
NI
item 28c.
f. At normal operating pool as indicated in item
f.
42,800 acres
5217 mi
1.27 mi
28d.
g. At minimum operating pool as indicated in
g.
37,000 acres
52.7 mi
NI
item 28e.
h. At "dead storage" pool indicated in item 20e
h.
5,500 acres
NI
NI
(the elevation of the entrance sill of the lowest
outlet).
30
Period of record of stream discharge at the dam site.
a.
Dam site: 10 Jan, 1935 to 1948;
(Give dates for beginning and end of period.)
b.
Gage heights: Florence, Ala (drainage
area: 30,800 sq mi): 7 Nov, 1871 to 1948.
31
Give the following peak discharges:
a. Maximum design flood at dam site prior to
a.
750,000 cu ft/sec.
dam construction.
b. Maximum recorded flood at dam site and date
b.
470,000 cu ft/sec (at Florence, Ala), Mar.
of occurrence.
1897.
32
Give the average and minimum reservoir inflow per
a.
56,000 cu ft/sec (1894-1934)
second or per day.
b.
4,070 cu ft/sec (1925).
AGO 3898A
20
