HARTWELL PERTINENT DATA |
LOCATION |
In the Piedmont Physiographic Province at Latitude 34 o 21' north,
Longitude 82o 48' west |
On the Savannah River: |
288.9 miles above the mouth |
274.5 miles above Savannah, Georgia |
89.3 miles above Augusta, Georgia |
67.3 miles above Thurmond Dam |
29.8 miles above Russell Dam |
In Hart County, Georgia 7 miles east of Hartwell, Georgia
2300 feet upstream of U.S. Highway 29 |
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 |
Above Richard B. Russell Dam |
27 |
2,890 |
Above Hartwell Dam |
20 |
2,088 |
Basin between Russell Dam and Hartwell Dam |
8 |
802 |
STORAGE VOLUMES |
Elevation (ft NGVD) |
Acre-feet |
Spillway design flood |
674.0 |
3,430,000 |
Standard project flood |
667.9 |
3,020,000 |
Flood control pool |
665.0 |
2,842,700 |
Maximum conservation pool |
660.0 |
2,550,000 |
Minimum conservation pool |
625.0 |
1,134,100 |
Conservation storage, usable |
625 to 660 |
1,416,000 |
Flood storage |
660 to 665 |
293,000 |
Surcharge storage |
665 to 674 |
596,000 |
POWERPLANT ELEVATIONS |
Elevation (ft NGVD) | |
Switchyard |
513 | |
Distributor |
484 | |
Bottom of draft tube |
442 | |
RESERVOIR AREAS |
Elevation(ft NGVD) |
Acres |
Spillway design flood (Max Surcharge Pool) |
674.0 |
71,300 |
Standard project flood |
667.9 |
64,800 |
Flood control pool |
665.0 |
61,400 |
Maximum conservation pool |
660.0 |
55,950 |
Minimum conservation pool |
625.0 |
27,650 |
Limits of clearing |
630 to 661 |
26,600 |
|
below 630 |
Partial clearing |
DAM, SPILLWAY, INTAKE AND POOL ELEVATIONS |
Feet NGVD | |
Top of dam |
679.0 | |
Maximum Observed Pool |
665.40 | 4/8/1964 |
Minimum Observed Pool |
637.49 |
12/10/2008 |
Spillway design flood |
674.0 |
Induced surcharge pool |
674.0 |
Standard project flood |
667.9 |
Top of tainter gates, closed |
665.0 |
100 year pool elevation |
666.4 |
Flood control pool |
665.0 |
Maximum conservation pool |
660.0 |
Average conservation pool |
652.0 |
Minimum conservation pool |
625.0 |
Spillway crest |
630.0 |
Intake invert for Hydropower |
500.0 |
Spillway bucket lip |
517.0 |
Elevation, bottom of sluice |
500.0 |
Draft tube exit |
442.0 |
DAM, SPILLWAY AND INTAKE DIMENSIONS |
Concrete gravity and earth embankment with concrete gravity
ogee spillway |
Length of concrete sections |
1900 feet | |
Length of earth embankment |
15,952 feet | |
Maximum height of concrete section |
204 feet | |
Maximum height of earth embankment |
106 feet | |
Length of intake section |
340 feet | |
Number of sluices |
2 | |
Width of sluices |
5.67 feet | |
Height of sluices |
10 feet | |
Gross length of spillway |
568 feet | |
Length of clear opening |
568 feet | |
Tainter gates (12) |
each 40 feet wide by 35.5 feet high | |
Flip bucket |
20 degrees | |
Radius of bucket |
40 feet | |
TAILWATER ELEVATIONS |
Feet NGVD | |
Spillway design flood |
519.3 | 565,000 cfs |
Standard project flood |
512.0 | 420,000 cfs |
(ft NGVD) Design flood |
510.0 | 380,000 cfs |
Maximum pool of record |
491.6 | |
Four units operating at average head |
481.6 | |
Maximum static condition |
482.6 | |
Streambed |
475.0 | |
DESIGN FLOWS |
|
Cubic feet per second |
Spillway Design Flood |
Peak Reservoir Inflow |
875,000 cfs |
|
Maximum Estimated Outflow |
565,000 cfs |
Standard Project Flood (SPF) |
Peak Reservoir Inflow |
435,000 cfs |
|
Maximum Estimated Outflow |
325,000 cfs |
POWERPLANT EQUIPMENT |
Initial units |
four conventional | |
Supplimental Units |
one conventional | |
Maximum net operating head |
192 feet | |
Average operating head |
171 feet | |
Minimum operation head |
142 feet | |
Turbine capacity at average head |
91,500 hp per unit | |
Maximum discharge at minimum head |
6500 cfs per unit | |
Length of draft tube |
66 feet | |
GENERATORS |
Initial installation - four conventional units each at |
66 MW initial |
85 MW current |
Supplemental installation - one conventional unit at |
84 MW initial |
90 MW current |
Total installation |
426 MW | |
Average annual energy |
457,342,000 kilowatt-hours | |
Generator rating |
90% pf, units 1-4; 95% pf, unit 5 |
66,000 kva |
Generator speed |
100 rpm | |
Generator voltage |
13.8 kV | |
Transformer rating |
two 3-phase |
56.6 mva |
Transformer voltages, kV |
13.2 to 230 | |
SWITCHYARD |
Location west (Georgia) bank, downstream |
Initial number of transformer bays |
2 | |
Ultimate number of transformer bays |
3 | |
Line positions |
4 | |
Equipment voltage |
230 kV | |