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Page 1
Texas Water Development Board
PO BOX 13231 • 1700 N. Congress Avenue • Austin, TX 78711-3231
Telephone (512) 463-7847 • Telefax (512) 475-2053 • 1-800-RELAYTX (for the hearing impaired)
CONSERVATION STORAGE DATA FOR
SELECTED MAJOR TEXAS RESERVOIRS
16
20
24
28
32
36
1980
1984
1988
1992
1996
2000
2004
Year
Millions Acre-Ftt
Conservation Storage
Conservation Storage Capacity
Current data are based on elevation near end of month at 77 reservoirs
that represent 98 percent of total conservation storage capacity in Texas
reservoirs having a capacity of 5,000 acre-feet or more.
RESERVOIR STORAGE
October 2007
Near the end of October, the 77 reservoirs monitored for this report
held nearly 30.8 million acre-feet in conservation storage. As a
statewide total, the state’s major reservoirs are approximately 89%
full, which is a record high for this time of year in the nearly 30 years
of monitoring. Storage went down during the month by 0.2 million
acre-feet (-1% of conservation storage capacity). Compared to October
last year, reservoir storage increased by 6 million acre-feet (17%).
Toward the end of October this year, 20 reservoirs were at 100% of
their conservation capacities. Regionally, storage was above 90% of
capacity in the South Central (99%), Upper Coast (98%), North
Central (95%), and Edwards Plateau (91%) Regions, but the High
Plains and Trans-Pecos Regions are still experiencing storage below
30% of their regional capacities. In the past month, seven out of nine
Regions observed decreases in storage and only two had increases.
Lake Meredith, the largest reservoir in NW Texas, is only 12% full.
Compared to this time last year, the storage increased everywhere
except the High Plains, Upper Coast, and Trans-Pecos Regions.
Conditions
Page 2
2
STREAMFLOW
O
CTOBER
S
TREAMFLOW
C
ONDITIONS
Reservoirs Shown on Map
1. Palo Duro Reservoir
2. Lake Meredith
3. MacKenzie Reservoir
4. White River Lake
5. Greenbelt Reservoir
6. Lake Kemp
7. Miller's Creek Reservoir
8. Fort Phantom Hill Reservoir
9. Lake Stamford
10. Lake J. B. Thomas
11. Lake Colorado City
12. Champion Creek Reservoir
13. Hords Creek Lake
14. Lake Kickapoo
15. Lake Arrowhead
16. Lake Texoma
17. Pat Mayse Lake
18. Cooper Lake
19. Lake Sulphur Springs
20. Lake Tawakoni
21. Bridgeport Reservoir
22. Eagle Mountain Reservoir
23. Benbrook Lake
24. Joe Pool Lake
25. Ray Roberts Lake
26. Lewisville Lake
27. Grapevine Lake
28. Lavon Lake
29. Lake Ray Hubbard
30. Richland-Chambers Creek Lake
31. Navarro Mills Lake
32. Bardwell Lake
33. Hubbard Creek Reservoir
34. Lake Graham
35. Possum Kingdom Lake
36. Lake Palo Pinto
37. Lake Granbury
38. Lake Pat Cleburne
39. Whitney Lake
40. Waco Lake
41. Proctor Lake
42. Belton Lake
43. Stillhouse Hollow Lake
44. Lake Georgetown
45. Granger Lake
46. Lake Limestone
47. Lake Brownwood
48. Wright Patman Lake
49. Lake Cypress Springs
50. Lake Bob Sandlin
51. Lake O' the Pines
52. Lake Fork Reservoir
53. Toledo Bend Reservoir
54. Lake Palestine
55. Lake Tyler
56. Sam Rayburn Reservoir
57. B. A. Steinhagen Lake
58. Cedar Creek Reservoir
59. Lake Livingston
60. Lake Conroe
61. Red Bluff Reservoir
62. E. V. Spence Reservoir
63. Twin Buttes Reservoir
64. O. C. Fisher Lake
65. O. H. Ivie Reservoir
66. Lake Buchanan
67. Intl. Amistad Reservoir
68. Somerville Lake
69. Lake Travis
70. Canyon Lake
71. Coleto Creek Reservoir
72. Medina Lake
73. Lake Houston
74. Lake Texana
75. Choke Canyon Reservoir
76. Lake Corpus Christi
77. Intl. Falcon Reservoir
Of 29 reporting index stations in October, computed 30-day mean flows were high (5% -
30%) at 9 stations, low (70% - 95%) at 9 stations, and near normal (30% - 70% exceedance)
at the remaining 11 stations. Compared to September, flows have increased at 5 index
stations but decreased at 24 stations.
On a regional basis, flows in October were high in the Trans-Pecos and Upper Coast Regions,
low in the East Texas Region, but normal everywhere else. Streamflow in the Lower Valley
Region is not monitored.
Page 3
3
CONSERVATION STORAGE DATA FOR SELECTED MAJOR TEXAS RESERVOIRS
Name of Lake
No. Conservation
Conservation
Change since
Change since
or Reservoir
on
Storage
Storage
Late September
Late October
Map
Capacity
Late Oct. 2007
2007
2006
(acre-feet)
(acre-feet)
(%) (acre-feet) (%) (acre-feet)
(%)
HIGH PLAINS
Palo Duro Reservoir
1
60,900
1,420
2
-200
0
560
1
Lake Meredith (Texas)
2
500,000
93,980
19
-5,520
-1
-15,620
-3
Lake Meredith
(Texas and Oklahoma)
(2)
779,560
93,980
12
-5,520
-1
-15,620
-2
MacKenzie Reservoir
3
46,250
8,450
18
-230
0
-410
-1
White River Lake
4
31,850
3,840
12
-390
-1
-860
-3
TOTAL
639,000
107,690
17
-6,340
-1
-16,330
-3
LOW ROLLING PLAINS
Greenbelt Reservoir
5
58,200
22,190
38
-1,670
-3
4,010
7
Lake Kemp
6
319,600
276,480
87
-13,960
-4
63,980
20
Miller's Creek Reservoir
7
27,890
25,650
92
-1,320
-5
4,190
15
Fort Phantom Hill Reservoir
8
70,030
69,610
99
-420
-1
28,360
40
Lake Stamford
9
52,700
52,300
99
-400
-1
17,340
33
Lake J. B. Thomas
10
202,300
30,280
15
-2,500
-1
-4,490
-2
Lake Colorado City
11
30,800
28,280
92
-800
-3
4,170
14
Champion Creek Reservoir
12
41,600
10,360
25
-270
-1
5,100
12
Hords Creek Lake
13
8,600
7,560
88
-270
-3
2,730
32
TOTAL
811,720
522,710
64
-21,610
-3
125,390
15
NORTH CENTRAL
Lake Kickapoo
14
106,000
83,670
79
-4,770
-5
11,260
11
Lake Arrowhead
15
262,100
233,920
89
-7,760
-3
58,870
22
Lake Texoma
16
2,722,300
2,563,150
94
-43,180
-2
113,400
4
Pat Mayse Lake
17
124,500
118,100
95
760
1
38,600
31
Cooper Lake
18
273,000
273,000
100
0
0
187,690
69
Lake Sulphur Springs
19
17,710
16,230
92
-1,210
-7
2,650
15
Lake Tawakoni
20
936,200
834,800
89
-19,000
-2
321,200
34
Bridgeport Reservoir
21
374,830
339,800
91
-16,500
-4
147,000
39
Eagle Mountain Reservoir
22
178,380
170,300
95
-1,800
-1
51,700
29
Benbrook Lake
23
88,200
81,260
92
600
1
30,900
35
Joe Pool Lake
24
175,800
167,430
95
-8,370
-5
6,300
4
Ray Roberts Lake
25
798,760
798,760
100
0
0
207,110
26
Lewisville Lake
26
555,000
555,000
100
0
0
169,730
31
Grapevine Lake
27
187,700
179,450
96
-8,250
-4
74,180
40
Lavon Lake
28
443,800
411,240
93
-8,010
-2
238,170
54
Lake Ray Hubbard
29
413,420
412,700
100
6,100
1
84,800
21
Richland-Chambers Creek Lake
30
1,103,820
1,100,000
100
-3,820
0
352,000
32
Navarro Mills Lake
31
55,810
53,920
97
-1,890
-3
29,590
53
Bardwell Lake
32
53,580
46,220
86
-940
-2
6,970
13
Hubbard Creek Reservoir
33
317,800
297,670
94
-8,720
-3
141,280
44
Lake Graham
34
45,000
40,940
91
-1,800
-4
5,590
12
Possum Kingdom Lake
35
551,820
529,640
96
-1,520
0
22,220
4
Lake Palo Pinto
36
27,650
24,340
88
-1,420
-5
11,000
40
Lake Granbury
37
135,680
130,260
96
-3,210
-2
15,000
11
Lake Pat Cleburne
38
25,300
24,700
98
-600
-2
6,200
25
Whitney Lake
39
622,800
525,590
84
-45,970
-7
78,570
13
Waco Lake
40
144,500
144,500
100
0
0
21,160
15
Proctor Lake
41
55,590
55,590
100
0
0
28,520
51
Belton Lake
42
434,500
434,500
100
0
0
74,600
17
Stillhouse Hollow Lake
43
226,060
226,060
100
0
0
16,350
7
Lake Georgetown
44
37,010
37,010
100
0
0
20,360
55
Granger Lake
45
54,280
54,280
100
0
0
6,190
11
Lake Limestone
46
215,750
197,060
91
-6,560
-3
12,860
6
Lake Brownwood
47
143,400
126,670
88
-3,340
-2
29,670
21
TOTAL
11,908,050
11,287,760
95
-191,180
-2
2,621,690
22
Page 4
4
CONSERVATION STORAGE DATA FOR SELECTED MAJOR TEXAS RESERVOIRS
Name of Lake
No. Conservation
Conservation
Change since
Change since
or Reservoir
on
Storage
Storage
Late September
Late October
Map
Capacity
Late Oct. 2007
2007
2006
(acre-feet)
(acre-feet)
(%) (acre-feet) (%) (acre-feet)
(%)
EAST
Wright Patman Lake
48
142,700
142,700
100
0
0
0
0
Lake Cypress Springs
49
66,800
66,800
100
0
0
14,760
22
Lake Bob Sandlin
50
202,300
200,400
99
-1,900
-1
75,500
37
Lake O' the Pines
51
252,000
250,610
99
-1,390
-1
87,340
35
Lake Fork Reservoir
52
635,200
635,200
100
0
0
93,600
15
Toledo Bend Reservoir
53
4,472,900
3,750,000
84
-38,000
-1
435,000
10
Lake Palestine
54
411,300
405,530
99
6,280
2
106,670
26
Lake Tyler
55
73,700
73,700
100
0
0
27,060
37
Sam Rayburn Reservoir
56
2,876,300
2,368,890
82
-141,050
-5
-359,590
-13
B. A. Steinhagen Lake
57
94,200
63,120
67
2,540
3
32,340
34
Cedar Creek Reservoir
58
637,050
611,800
96
-13,900
-2
166,300
26
Lake Livingston
59
1,750,000
1,747,000
100
-3,000
0
-3,000
0
Lake Conroe
60
429,900
398,700
93
-4,500
-1
7,500
2
TOTAL
12,044,350
10,714,450
89
-194,920
-2
683,480
6
TRANS-PECOS
Red Bluff Reservoir
61
307,000
85,660
28
-590
0
-5,420
-2
TOTAL
307,000
85,660
28
-590
0
-5,420
-2
EDWARDS PLATEAU
E. V. Spence Reservoir
62
488,760
78,810
16
-4,060
-1
6,810
1
Twin Buttes Reservoir
63
177,800
71,730
40
190
0
36,420
20
O.C. Fisher Lake
64
119,200
10,990
9
-640
-1
2,610
2
O. H. Ivie Reservoir
65
554,340
374,600
68
-6,900
-1
144,700
26
Lake Buchanan
66
896,980
832,330
93
-210
0
343,400
38
Amistad Reservoir (Texas)
67
1,771,030
2,268,000
128
254,000
14
373,000
21
Amistad Reservoir
(Texas and Mexico)
(67)
3,151,300
2,814,000
89
61,000
2
231,000
7
TOTAL
4,008,110
3,636,460
91
242,380
6
906,940
23
SOUTH CENTRAL
Somerville Lake
68
155,060
149,250
96
-3,220
-2
-5,810
-4
Lake Travis
69
1,144,100
1,144,100
100
0
0
511,220
45
Canyon Lake
70
385,600
379,180
98
-3,060
-1
53,860
14
Coleto Creek Reservoir
71
35,060
31,490
90
0
0
6,130
17
Medina Lake
72
254,000
254,000
100
0
0
150,900
59
TOTAL
1,973,820
1,958,020
99
-6,280
0
716,300
36
UPPER COAST
Lake Houston
73
128,860
128,860
100
0
0
0
0
Lake Texana
74
157,900
151,630
96
3,260
2
-4,520
-3
TOTAL
286,760
280,490
98
3,260
1
-4,520
-2
SOUTHERN
Choke Canyon Reservoir
75
695,260
682,900
98
-11,100
-2
153,100
22
Lake Corpus Christi
76
241,240
241,240
100
0
0
134,540
56
Falcon Reservoir (Texas)
77
1,555,120
1,258,000
81
-9,000
-1
635,000
41
Falcon Reservoir
(Texas and Mexico)
(77)
2,653,290
1,780,000
67
14,000
1
699,000
26
TOTAL
2,491,620
2,182,140
88
-20,100
-1
922,640
37
STATE TOTAL
34,470,430
30,775,380
89
-195,380
-1
5,950,170
17
Page 5
5
Note:
Conservation storage capacity is the space available to store water above the level of invert of lowest outlet
works and below the level of top of conservation pool or normal maximum operating level. Conservation
storage refers to the volume of water held within the conservation storage space. Not included is any water in
flood control storage (above the top of conservation pool or normal maximum operating level), or any water in
so called dead storage (in the bottom of the reservoir, below the invert of lowest outlet works and consequently
not removable by gravity flow alone.) Percentage of conservation storage is based on the conservation storage
capacity of the reservoir and the conservation storage in the reservoir for the date shown. Percent change is
given by % Change = 100 * (current conservation storage - past conservation storage)/conservation storage
capacity.
Current data are based on elevations near end of the month at 77 reservoirs that together represent 98 percent of
the total conservation storage capacity of major Texas reservoirs (those with capacity of 5,000 acre-feet or more
each). Figures shown are for the Texas share of conservation storage in all reservoirs.
Page 6
6
OCTOBER GROUND WATER LEVELS IN OBSERVATION WELLS
Well No. 10-45-102
Southwest Castro County
Ogallala
150
165
180
195
210
225
240
255
270
285
300
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010
D
e
pt
h t
o
w
a
t
e
r
i
n
f
t
.
The late October water-level measurement in this Ogallala Aquifer well, elevation 3,816 feet above sea
level, was 268.13 feet below land surface. This measurement was 0.13 feet below last month’s
measurement, 1.02 feet below last year’s measurement, and 112.13 feet below the initial measurement
recorded in 1968. No water level measurements were recorded for September through December 2005.
Well No. 32-15-504
Near Hurst, Tarrant County
Paluxy
420
430
440
450
460
470
480
490
500
1970
1975
1980 1985
1990
1995
2000 2005
2010
D
e
pt
h t
o
w
a
t
e
r
i
n
f
t
.
The late October water-level measurement in this Paluxy Formation Trinity Aquifer well, elevation 535
feet above sea level, was 441.48 feet below land surface. This measurement was 3.34 feet below last
month’s measurement, 10.82 feet above last year’s measurement, and 63.48 feet below the initial
measurement recorded in 1953. No water level measurements were recorded for September or October
2005.
Page 7
7
Well No. 40-35-404
Gatesville, Coryell County
Hosston/Trinity
410
420
430
440
450
460
470
480
1993
1995 1997
1999
2001
2003 2005
2007
D
e
pt
h t
o
w
a
t
e
r
i
n
f
t
.
The late October water-level measurement in this Hosston Formation Trinity Aquifer well, elevation 823
feet above sea level, was 466.72 feet below land surface. This water level was 0.54 feet above last month’s
measurement, 1.45 feet above last year’s measurement, and 174.72 feet below the initial measurement
recorded in 1955. No water level measurement was recorded for October 2005.
Well No. 49-13-301
El Paso, El Paso County
Bolson Deposits
220
230
240
250
260
270
280
290
300
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010
D
e
pt
h t
o
w
a
t
e
r
i
n
f
t
.
The late October water-level measurement in this Hueco Bolson Aquifer well, elevation 3,882 feet above
sea level, was 287.38 feet below land surface. This water level was 0.09 feet above last month’s
measurement, 1.82 feet above last year’s measurement, and 55.48 feet below the initial measurement in
1964. No water level measurements were recorded for May through July 2007, and October or December
2005.
Page 8
8
Well No. 65-14-409
Alief, Harris County
Evangeline
190
210
230
250
270
290
310
330
1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010
De
p
t
h
t
o
w
a
te
r
i
n
f
t
.
The late October water-level measurement in this Evangeline Formation Gulf Coast Aquifer well, elevation
66 feet above sea level, was 198.39 feet below land surface. This was 0.26 feet above last month’s
measurement, 10.14 feet above last year’s measurement, and 62.89 feet below the initial measurement
recorded in 1947.
Well No. 68-37-203 (J-17)
In San Antonio, Bexar County
Edwards and Associated Limestones
0
20
40
60
80
100
120
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010
De
p
t
h
t
o
w
a
t
e
r
i
n
f
t
.
The late October water-level measurement in this Edwards (BFZ) Aquifer well, elevation 731 feet above
sea level, was 38.60 feet below land surface. This was 3.20 feet below last month's measurement, 30.90 feet
above last year's measurement, and 8.04 feet above the initial measurement recorded in 1962.
Page 9
9
Well No. 68-60-912
Between Poteet and Pleasanton, Atascosa County
Carrizo
60
70
80
90
100
110
120
130
140
1992 1994 1996 1998 2000 2002 2004 2006 2008
D
e
pt
h t
o
w
a
t
e
r
i
n
f
t
.
The late October water-level measurement in this Carrizo Aquifer well, elevation 446 feet above sea level,
was 92.16 feet below land surface. This measurement was 0.90 feet above last month’s measurement, 27.98
feet above last year’s measurement, and 56.80 feet below the initial measurement recorded in 1965. No
water level measurements were recorded for March and April 2007.
H
YDROGRAPH OF THE
M
ONTH
0
5
10
15
20
25
30
35
40
1972
1977
1982
1987
1992
1997
2002
2007
D
e
p
t
h
to
w
a
te
r i
n
f
t
.
Each month this space features a new hydrograph (marked with the • symbol
on the map) depicting different aquifers and different conditions in Texas.
Well No 16-28-902
Bowie County
This water level observation well, located 6 miles west of New Boston, at an elevation of 352 feet ASL,
was completed in the Nacatoch Aquifer. Stabilization of water levels in this aquifer is a result of reduced
pumpage for municipal use and conversion to surface water supplies.
Page 10
10
October, 2007
Water level measurements were available for all seven key monitoring wells. Water levels rose in four of the
seven monitoring wells since the beginning of October, ranging from 0.09 feet in the El Paso Co. Hueco Bolson
well to 0.90 feet in the Atascosa Co. Carrizo well. Water levels declined in the remaining monitoring wells,
ranging from 0.13 feet in the Castro Co. Ogallala well to 3.34 feet in the Tarrant Co. Trinity well. The J-17 well
recorded a water level of 38.60 feet below land surface, 3.20 feet below last month's measurement. This water
level is 41.40 feet above the Stage 1 critical management level.
T
EXAS
W
ATER
D
EVELOPMENT
B
OARD
1700 N. C
ONGRESS
A
VE
.
P.O. B
OX
13231
A
USTIN
TX 78711-3231