IF BR index >10%, Target 4200 cfs (weekly average) release at Thurmond Dam
IF BR index <10%, Target 4000 cfs (weekly average) release at Thurmond Dam
2
Feb 1 - Oct 31
IF BR index >10%, Target 4000 cfs (weekly average) release at Thurmond Dam
IF BR index <10%, Target 3800 cfs (daily average) release at Thurmond Dam
Nov 1 - Jan 31
Target 3600 cfs (daily average) release at Thurmond Dam
3
Feb 1 - Oct 31
Target 3800 cfs (daily average) release at Thurmond Dam
Nov 1 - Jan 31
Target 3100 cfs (daily average) release at Thurmond Dam
(Feb 1 - Feb 28) w/NMFS approval
4
Feb 1 - Oct 31
Target 3600 cfs (daily average) release at Thurmond Dam
Nov 1 - Jan 31
Target 3100 cfs (daily average) release at Thurmond Dam
(Feb 1 – Feb 28) w/NMFS approval
BR index refers to the relative percentile of the 28 day average flow for the Broad River Gage (02192000) at Bell, GA.
There may be up to a 2 week delay in reducing flows from the normal unrestricted releases at Thurmond to the level 1 drought flow restriction levels. If in Drought operations, Thurmond will release 200 cfs more than the required Drought trigger target flow for an 10 day period during summer. This additional flow is mitigation for possible Harbor impacts implemented as part of the Storage Balance Agreement update with the Duke Energy.
Hartwell Basin, Doppler Radar Estimate for September, 2024
Day\Time
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
24:00
Sum(Inches)
09/01/2024
0.00
0.00
0.01
0.02
0.02
0.02
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.01
0.02
0.06
0.17
09/02/2024
0.04
0.02
0.01
0.01
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.09
09/03/2024
0.02
0.06
0.06
0.01
0.00
0.00
0.01
0.01
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.17
09/04/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
09/05/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
09/06/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
09/07/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.01
0.01
09/08/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.01
09/09/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Times are in GMT (GMT - 5 hrs = Eastern)
Total Rainfall for the month = 0.45 inches
These basin rainfall estimates are based on spatial averaging of NWS stage 3 doppler rainfall.
This data is experimental in nature and should be used as provisional or subject to change.
Hourly Radar Rain
Russell Basin, Doppler Radar Estimate for September, 2024
Day\Time
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
24:00
Sum(Inches)
09/01/2024
0.12
0.14
0.04
0.01
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.01
0.04
0.03
0.04
0.44
09/02/2024
0.05
0.04
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.10
09/03/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
09/04/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
09/05/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
09/06/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
09/07/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.01
09/08/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
09/09/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Times are in GMT (GMT - 5 hrs = Eastern)
Total Rainfall for the month = 0.55 inches
These basin rainfall estimates are based on spatial averaging of NWS stage 3 doppler rainfall.
This data is experimental in nature and should be used as provisional or subject to change.
Hourly Radar Rain
Thurmond Basin, Doppler Radar Estimate for September, 2024
Day\Time
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
24:00
Sum(Inches)
09/01/2024
0.04
0.03
0.05
0.03
0.02
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.02
0.05
0.04
0.09
0.03
0.43
09/02/2024
0.03
0.06
0.10
0.05
0.01
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.27
09/03/2024
0.00
0.00
0.02
0.05
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.08
09/04/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
09/05/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
09/06/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.01
0.01
09/07/2024
0.01
0.01
0.01
0.01
0.01
0.01
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.07
09/08/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
09/09/2024
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Times are in GMT (GMT - 5 hrs = Eastern)
Total Rainfall for the month = 0.86 inches
These basin rainfall estimates are based on spatial averaging of NWS stage 3 doppler rainfall.
This data is experimental in nature and should be used as provisional or subject to change.
AcHourly
HARTWELL HOURLY PROJECT LOGS
PROCESS TIME 09/09/2024 06:50:42
CENTRAL TIME
HEADWATER ELEVATION FT-MSL
TAILWATER ELEVATION FT-MSL
GROSS HEAD FT
TOTAL DISCHARGE CFS
STORAGE CHANGE CFS
NET INFLOW CFS
GENERATION SCHEDULE MWH
01:00 09/09/2024
654.58
474.96
179.62
0
0
0
0
02:00 09/09/2024
654.58
474.96
179.62
0
0
0
0
03:00 09/09/2024
654.58
474.96
179.62
0
0
0
0
04:00 09/09/2024
654.58
474.96
179.62
0
0
0
0
05:00 09/09/2024
654.58
474.97
179.61
0
0
0
0
Average:
654.58
474.96
179.62
0
0
0
0
Maximum:
654.58
474.97
179.62
16094
0
0
211
Minimum:
654.58
474.96
179.61
0
0
0
DSUM= 1004
AcHourly
RUSSELL HOURLY PROJECT LOGS
PROCESS TIME 09/09/2024 06:50:53
CENTRAL TIME
HEADWATER ELEVATION FT-MSL
TAILWATER ELEVATION FT-MSL
GROSS HEAD FT
TOTAL DISCHARGE CFS
TOTAL PUMP CFS
STORAGE CHANGE CFS
NET INFLOW CFS
GENERATION SCHEDULE MWH
01:00 09/09/2024
474.40
323.29
151.11
0
21033
19116
19116
0
02:00 09/09/2024
474.47
323.08
151.39
0
20926
22351
22351
0
03:00 09/09/2024
474.53
323.12
151.41
0
0
19333
19333
0
Average:
474.47
323.16
151.30
0
13986
20267
20267
0
Maximum:
474.53
323.29
151.41
50063
21033
22351
22351
528
Minimum:
474.40
323.08
151.11
0
0
19116
19116
DSUM= 2720
DMIN=3371
0 CFS Daily Average thru 3:00 Central Time
DMAX=3221
AcHourly
THURMOND HOURLY PROJECT LOGS
PROCESS TIME 09/09/2024 06:51:05
CENTRAL TIME
HEADWATER ELEVATION FT-MSL
TAILWATER ELEVATION FT-MSL
GROSS HEAD FT
TOTAL DISCHARGE CFS
STORAGE CHANGE CFS
NET INFLOW CFS
GENERATION SCHEDULE MWH
01:00 09/09/2024
323.94
184.74
139.20
0
- 14520
- 14520
0
02:00 09/09/2024
323.91
184.44
139.47
0
- 21780
- 21780
0
03:00 09/09/2024
323.88
184.27
139.61
0
- 21780
- 21780
0
04:00 09/09/2024
323.83
184.15
139.68
0
- 58080
- 58080
0
05:00 09/09/2024
323.83
183.98
139.85
0
0
0
0
Average:
323.88
184.32
139.56
0
- 23232
- 23232
0
Maximum:
323.94
184.74
139.85
21105
0
0
209
Minimum:
323.83
183.98
139.20
0
- 58080
- 58080
DSUM= 1030
DMIN=1030
DMAX=1030
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
RUSSELL PERTINENT DATA
LOCATION
In the Piedmont Physiographic Province at Latitude 34o 01' north, Longitude
82o 36' west
On the Savannah River:
259.1 miles above the mouth
244.7 miles above Savannah, Georgia
59.5 miles above Augusta, Georgia
37.5 miles above Thurmond Dam
29.8 miles below Hartwell Dam
In Elbert County, Georgia and Abbeville County, South Carolina
18 miles southeast of Elberton, Georgia
4 miles southwest of Calhoun Falls, South Carolina
40 miles northeast of Athens, 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
Above Richard B. Russell Dam
27
2,890
Above Hartwell Dam
20
2,088
Basin between Russell Dam and Hartwell Dam
8
802
(One inch of runoff over the Savannah River Basin above Russell
Dam equals 154,133 acre-feet)
STORAGE VOLUMES
Elevation (ft NGVD)
Acre-feet
Spillway design flood
490.0
1,488,155
Standard project flood
484.3
1,305,000
Flood control pool
480.0
1,166,166
Maximum conservation pool
475.0
1,026,200
Minimum conservation pool
470.0
899,400
Conservation storage, usable
470 to 475
126,800
Flood storage
475 to 480
140,000
Surcharge storage
480 to 490
322,000
RESERVOIR AREAS
Elevation(s)(ft NGVD)
Acres
Spillway design flood ( Max Surcharge Pool)
490.0
35,150
Standard project flood
484.3
31,770
Flood control pool
480.0
29,340
Maximum conservation pool
475.0
26,653
Minimum conservation pool
470.0
24,117
Limits of clearing
465 to 477
5,880
462 to 476
4,938
440 to 462
8,938
below 440
12,400
430 to 465
11,890
below 430
7,540
DAM, SPILLWAY, INTAKE AND POOL ELEVATIONS
Elevation(s)(ft NGVD)
Top of dam
495.0
Maximum Observed Pool
479.75
4/14/2003
Minimum Observed Pool
468.70
11/15/1984
Spillway design flood
490.0
Induced surcharge pool
485.0
Standard project flood
484.3
Top of tainter gates, closed
481.0
100 year pool elevation
481.5
Flood control pool
480.0
Maximum conservation pool
475.0
Average conservation pool
473.0
Minimum conservation pool
470.0
Spillway crest
436.0
Intake invert for Hydropower
370.0
Spillway bucket lip
357.25
Elevation, bottom of sluice
320.0
Draft tube exit
265.0
Bottom of draft tube (conventional units)
262.0
Bottom of draft tube (pump units)
250.0
POWERPLANT ELEVATIONS
Elevation(s)(ft NGVD)
Switchyard
358
Distributor
300
Bottom of draft tube
262
Bottom of pump unit
250
TAILWATER ELEVATIONS
Elevation(s)(ft NGVD)
Spillway design flood
356.0
801,000 cfs
Standard project flood
343.0
360,000 cfs
Powerhouse Design flood
350.0
680,000 cfs
Maximum pool of record
332.5
Four units operating at average head
327.5
Maximum static condition
312.0
Streambed
300.0
DAM, SPILLWAY AND INTAKE DIMENSIONS
Concrete gravity and earth embankment with concrete gravity ogee spillway
Length of concrete sections
1,883.5 feet
Length of earth embankment, Georgia
2,180.0 feet
Length of earth embankment, South Carolina
460.0 feet
Maximum height of concrete section
210 feet
Maximum height of earth embankment
195 feet
Length of intake section
284 feet
Number of sluices
5
Width of sluices
5.67 feet
Height of sluices
10 feet
Gross length of spillway
590 feet
Length of clear opening
500 feet
Tainter gates (10)
each 50 feet wide by 45 feet high
Flip bucket
45 degrees
Radius of bucket
50 feet
DESIGN FLOWS
Cubic feet per second
Standard Project Flood (SPF) Peak Reservoir Inflow
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