THURMOND PERTINENT DATA |
LOCATION |
In the Piedmont Area at Latitude 33o - 39' N,
Longitude 82o - 11' W |
On the Savannah River: |
221.6 miles above the mouth |
207.2 miles above Savannah, Georgia |
22.0 miles above Augusta, Georgia |
37.5 miles below Richard B. Russell Dam |
67.3 miles below Hartwell Dam |
In Columbia County, Georgia and McCormick County,
South Carolina 23 miles southeast of Augusta, Georgia |
DRAINAGE AREA |
. |
percentage |
square miles |
Above the mouth of the Savannah River |
100 |
10,579 |
Above Augusta, Georgia (Butler Cr. gage) |
71 |
7,508 |
Above J. Strom Thurmond Dam |
58 |
6,144 |
Thurmond Local Basin |
. |
3254 |
Uncontrolled local area |
(Thurmond Dam to Butler Creek) |
1,364 |
STORAGE VOLUMES |
Elevation (ft NGVD) |
Acre-feet |
Spillway design flood |
344.7 |
3,700,000 |
Standard project flood |
342.1 |
3,450,000 |
Flood control pool |
335.0 |
2,900,000 |
Maximum conservation pool |
330.0 |
2,510,000 |
Minimum conservation pool |
312.0 |
1,465,000 |
Conservation storage, usable |
312 to 330 |
1,045,000 |
Flood storage |
330 to 335 |
390,000 |
Surcharge storage |
335 to 346 |
920,000 |
RESERVOIR AREAS |
|
Elevation(ft NGVD) |
Acres |
Max Induced Surcharge Pool |
346.0 |
98,500 |
Spillway design flood |
344.7 |
94,700 |
Standard project flood |
342.1 |
90,000 |
Flood control pool |
335.0 |
78,500 |
Maximum conservation pool |
330.0 |
72,000 |
Minimum conservation pool |
312.0 |
45,000 |
DAM, SPILLWAY, INTAKE AND POOL ELEVATIONS |
|
Elevation(ft NGVD) |
Top of dam |
351.0 |
Maximum Observed Pool |
336.46 | 4/11/1964 |
Minimum Observed Pool |
296.4 | 2/03/1956 |
Spillway design flood |
344.7 |
Induced surcharge pool |
346.0 |
Standard project flood |
342.1 |
Top of Tainter gates, closed |
335.0 |
100 year pool elevation |
337.9 |
Flood control pool |
335.0 |
Maximum conservation pool |
330.0 |
Average conservation pool |
327.5 |
Minimum conservation pool |
312.0 |
Spillway crest |
300.0 |
Intake invert for Hydropower |
228.0 |
Spillway bucket lip |
(varies) 185.0 |
Elevation, bottom of sluice |
190.0 |
Draft tube exit |
160.0 |
Bottom of draft tube |
154.0 |
POWERPLANT ELEVATIONS |
|
Elevation(ft NGVD) |
Switchyard |
240.5 |
Transformers |
235.0 |
TAILWATER ELEVATIONS |
|
Elevation(ft NGVD) |
Spillway design flood |
255.0 | 1,055,000 cfs |
Standard project flood |
240.0 | 645,000 cfs |
Powerhouse Design flood |
240.0 | 645,000 cfs |
Maximum tailwater of record (277,000 cfs) |
220.5 |
7 units Operating at Average Head |
193.0 |
1 units Operating at Average Head |
185.0 |
Average Operating condition |
191.0 |
Streambed |
176.0 |
DAM, SPILLWAY AND INTAKE DIMENSIONS |
Concrete gravity and earth embankment with
concrete gravity spillway |
Length of concrete sections |
2,282 feet |
Length of earth embankment |
3,398 feet |
Maximum height of concrete section |
200 feet |
Maximum height of earth embankment |
151 feet |
Length of intake section |
434 feet |
Number of sluices |
8 |
Width of sluices |
4 feet |
Height of sluices |
9 feet |
Spillway |
Gross length of spillway |
1,096 feet |
Length of clear opening |
920 feet |
Tainter gates (23) |
each 40 feet wide by 35 feet high |
Width of Gate |
40 feet |
Height of Gate |
35 feet |
Type of Bucket |
Submerged Roller Bucket |
Radius of bucket |
50 feet |
DESIGN FLOWS |
Cubic feet per second |
Standard Project Flood (SPF) |
Peak Reservoir Inflow |
645,000 cfs |
Maximum Estimated Outflow |
560,000 cfs |
Spillway Design Flood |
Peak Reservoir Inflow |
1,180,000 cfs |
Maximum Estimated Outflow |
1,055,000 cfs |
POWERPLANT EQUIPMENT |
Conventional Operating Units |
7 | 52 MW |
Service Units |
Two |
Maximum net operating head |
152 feet |
Average operating head |
136 feet |
Minimum operation head |
118 feet |
Turbine capacity at average head |
55,000 hp per unit |
Maximum discharge at critical head |
4,920 cfs per unit |
Length of draft tube |
59 feet |
GENERATORS |
Total installation |
364 MW |
Average annual energy |
654,701,000 kilowatt-hours |
Generator rating |
(0.9 pf) |
44,444 kva |
Generator speed |
100 rpm |
Generator voltage |
13.8 kV |
Transformer rating, |
three three-phase, |
each 105,000 kva |
Transformer rating, |
one three-phase, |
52,500 kva |
Transformer voltages, kV |
13.2 to 115 kv |
SWITCHYARD |
Location East (South Carolina) Bank, Downstream |
Number of Bays |
11 |
Number of Generator Bays |
4 |
Number of Line Bays |
7 |
Equipment voltage |
115 kV |