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 11 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 October, 2023
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)
10/01/2023
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
10/02/2023
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
10/03/2023
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
Times are in GMT (GMT - 5 hrs = Eastern)
Total Rainfall for the month = 0.00 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 October, 2023
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)
10/01/2023
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
10/02/2023
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
10/03/2023
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
Times are in GMT (GMT - 5 hrs = Eastern)
Total Rainfall for the month = 0.00 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 October, 2023
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)
10/01/2023
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
10/02/2023
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
10/03/2023
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
Times are in GMT (GMT - 5 hrs = Eastern)
Total Rainfall for the month = 0.00 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 10/03/2023 12:33:28
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 10/03/2023
655.26
476.21
179.05
0
0
0
0
02:00 10/03/2023
655.26
476.21
179.05
0
0
0
0
03:00 10/03/2023
655.26
476.21
179.05
0
0
0
0
04:00 10/03/2023
655.26
476.20
179.06
0
0
0
0
05:00 10/03/2023
655.26
476.20
179.06
0
0
0
0
06:00 10/03/2023
655.26
476.20
179.06
0
0
0
0
07:00 10/03/2023
655.23
476.21
179.02
0
- 18675
- 18675
0
08:00 10/03/2023
655.21
476.21
179.00
0
- 12450
- 12450
0
09:00 10/03/2023
655.21
476.21
179.00
0
0
0
0
10:00 10/03/2023
655.23
476.21
179.02
0
12450
12450
0
11:00 10/03/2023
0
0
12:00 10/03/2023
0
0
13:00 10/03/2023
0
0
14:00 10/03/2023
0
0
15:00 10/03/2023
2260
30
16:00 10/03/2023
4144
55
17:00 10/03/2023
7760
103
18:00 10/03/2023
7986
106
19:00 10/03/2023
8664
115
20:00 10/03/2023
2260
30
21:00 10/03/2023
0
0
22:00 10/03/2023
0
0
23:00 10/03/2023
0
0
24:00 10/03/2023
0
0
Average:
655.24
476.21
179.04
1378
- 1868
- 1868
18
Maximum:
655.26
476.21
179.06
8664
12450
12450
115
Minimum:
655.21
476.20
179.00
0
- 18675
- 18675
DSUM= 439
DMIN=464
0 CFS Daily Average thru 10:00 Central Time
DMAX=439
AcHourly
RUSSELL HOURLY PROJECT LOGS
PROCESS TIME 10/03/2023 12:33:32
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 10/03/2023
473.77
324.49
149.28
0
0
0
0
0
02:00 10/03/2023
473.77
324.52
149.25
0
0
0
0
0
03:00 10/03/2023
473.77
324.55
149.22
0
0
0
0
0
04:00 10/03/2023
473.77
324.58
149.19
0
0
0
0
0
05:00 10/03/2023
473.77
324.60
149.17
0
0
0
0
0
06:00 10/03/2023
473.77
324.56
149.21
0
0
0
0
0
07:00 10/03/2023
473.78
324.53
149.25
0
0
3156
3156
0
08:00 10/03/2023
473.77
324.52
149.25
0
0
- 3156
- 3156
0
09:00 10/03/2023
0
0
10:00 10/03/2023
0
0
11:00 10/03/2023
0
0
12:00 10/03/2023
0
0
13:00 10/03/2023
0
0
14:00 10/03/2023
7263
82
15:00 10/03/2023
14526
164
16:00 10/03/2023
26571
300
17:00 10/03/2023
26571
300
18:00 10/03/2023
14526
164
19:00 10/03/2023
7263
82
20:00 10/03/2023
0
0
21:00 10/03/2023
0
0
22:00 10/03/2023
0
0
23:00 10/03/2023
0
0
24:00 10/03/2023
0
0
Average:
473.77
324.54
149.23
4030
0
0
0
46
Maximum:
473.78
324.60
149.28
26571
0
3156
3156
300
Minimum:
473.77
324.49
149.17
0
0
- 3156
- 3156
DSUM= 1092
DMIN=1172
0 CFS Daily Average thru 8:00 Central Time
DMAX=1122
AcHourly
THURMOND HOURLY PROJECT LOGS
PROCESS TIME 10/03/2023 12:33:42
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 10/03/2023
325.24
184.92
140.32
0
21780
21780
0
02:00 10/03/2023
325.23
184.81
140.42
0
- 7260
- 7260
0
03:00 10/03/2023
325.22
184.66
140.56
0
- 7260
- 7260
0
04:00 10/03/2023
325.21
184.52
140.69
0
- 14520
- 14520
0
05:00 10/03/2023
325.21
184.40
140.81
0
0
0
0
06:00 10/03/2023
325.23
184.25
140.98
0
14520
14520
0
07:00 10/03/2023
0
0
08:00 10/03/2023
0
0
09:00 10/03/2023
0
0
10:00 10/03/2023
0
0
11:00 10/03/2023
0
0
12:00 10/03/2023
0
0
13:00 10/03/2023
0
0
14:00 10/03/2023
7945
80
15:00 10/03/2023
13903
140
16:00 10/03/2023
10725
108
17:00 10/03/2023
15194
153
18:00 10/03/2023
17081
172
19:00 10/03/2023
16783
169
20:00 10/03/2023
13407
135
21:00 10/03/2023
3476
35
22:00 10/03/2023
3476
35
23:00 10/03/2023
0
0
24:00 10/03/2023
0
0
Average:
325.22
184.59
140.63
4250
1210
1210
43
Maximum:
325.24
184.92
140.98
17081
21780
21780
172
Minimum:
325.21
184.25
140.32
0
- 14520
- 14520
DSUM= 1027
DMIN=1020
DMAX=1014
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 NGVD29)
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 NGVD29)
Switchyard
513
Distributor
484
Bottom of draft tube
442
RESERVOIR AREAS
Elevation(ft NGVD29)
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 NGVD29
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
PMF Storm Pool Elevation
671.8 ft NGVD29
100 year pool elevation
666.4 ft NGVD29
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 NGVD29
Spillway design flood
519.3
565,000 cfs
Standard project flood
512.0
420,000 cfs
(ft NGVD29) 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
518,000 cfs
Maximum Estimated Outflow
360,000 cfs
Spillway Design Flood
Peak Reservoir Inflow
1,035,210 cfs
Maximum Estimated Outflow
801,500 cfs
POWERPLANT EQUIPMENT
Initial units
4 conventional
Supplemental Units
4 pump turbine
Maximum net operating head
162 feet
Average operating head
144 feet
Minimum operation head
134 feet
Turbine capacity at average head
104,000 hp per unit
Maximum discharge at minimum head
8,000 cfs per unit
Length of draft tube
70 feet
GENERATORS
Initial installation
four conventional units
80 MW
Supplemental installation
four pump turbine units
80 MW
Total installation
640,000 kW
Average annual energy
466,090,000 kilowatt-hours
Generator rating
(95% pf)
78,947 kVa
Generator speed
120 rpm
Generator voltage
13.8 kV
Transformer rating,
two 3-phase,
each 182,000 kVa
Transformer voltages
13.2 to 230 kV
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
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
1 year pool elevation
322.5
From PA No#1 June 2014
2 year pool elevation
331.5
From PA No#1 June 2014
5 year pool elevation
333.5
From PA No#1 June 2014
10 year pool elevation
334.8
From PA No#1 June 2014
50 year pool elevation
337.1
From PA No#1 June 2014
100 year pool elevation
337.9
From PA No#1 June 2014
200 year pool elevation
338.5
From PA No#1 June 2014
500 year pool elevation
340.1
From PA No#1 June 2014
25% IDF pool elevation
335.2
From PA No#1 June 2014
50% IDF pool elevation
338.9
From PA No#1 June 2014
75% IDF pool elevation
341.6
From PA No#1 June 2014
PMF pool elevation
343.0
From PA No#1 June 2014
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
