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Reservoir
Location
% Full
SWE % of Avg
Full Capacity (kaf)
Total Capacity (kaf)
Outflow (cfs)
Angostura Reservoir
SD
56
n/a
123
123
1
Alcova Reservoir
WY
85
n/a
184
184
494
Lake Altus
OK
24
n/a
129
149
0
Lake Alice Reservoir
NE
0
n/a
11
11
n/a
Arbuckle Reservoir
OK
99
n/a
72
108
n/a
Buffalo Bill Reservoir
WY
60
129
647
647
160
Bighorn Lake (Yellowtail)
MT
86
114
1011
1279
2002
Box Butte Reservoir
NE
34
n/a
29
29
n/a
Belle Fourche Reservoir
SD
85
n/a
173
173
0
Bull Lake Reservoir
WY
26
121
152
152
37
Bonny Lake
CO
0
n/a
41
170
2
Boysen Reservoir
WY
71
124
742
893
602
Calamus Reservior
NE
80
n/a
127
127
n/a
Carter Lake Reservoir
CO
75
n/a
112
112
n/a
Cedar Bluff Reservoir
KS
34
n/a
172
364
0
Choke Canyon Reservoir
TX
9
n/a
695
695
n/a
Clark Canyon Reservoir
MT
50
102
174
253
36
Canyon Ferry Lake
MT
78
102
1892
1993
2994
Cheney Reservoir
KS
113
n/a
167
248
n/a
Fort Cobb Reservoir
OK
97
n/a
74
136
n/a
Davis Creek Reservoir
NE
42
n/a
31
31
n/a
Deerfield Reservoir
SD
97
n/a
16
16
10
E. A. Patterson Lake
ND
75
n/a
9
9
11
Enders Reservoir
NE
20
n/a
43
73
2
Flatiron Reservoir
CO
77
n/a
1
1
455
Foss Reservoir
OK
96
n/a
169
350
n/a
Fresno Reservoir
MT
33
92
93
93
41
Gibson Reservoir
MT
44
110
99
99
182
Glendo Reservoir
WY
46
38
517
789
23
Lake Granby
CO
71
n/a
540
540
29
Green Mountain Reservoir
CO
39
n/a
154
154
162
Gray Reef Reservoir
WY
87
n/a
2
2
503
Guernsey Reservoir
WY
29
n/a
46
46
3
Hugh Butler Lake (Red Willow Dam)
NE
42
n/a
36
85
2
Harlan County Lake
NE
61
n/a
314
814
0
Hebgen Lake
MT
83
87
386
400
725
Horsetooth Reservoir
CO
80
n/a
157
157
0
Harry Strunk Lake (Medicine Creek)
NE
76
n/a
36
88
1
Helena Valley Reservoir
MT
80
n/a
10
10
n/a
Jamestown Reservoir
ND
86
n/a
32
221
13
Keyhole Reservoir
WY
59
n/a
189
329
0
Kortes Reservoir
WY
100
n/a
5
5
631
Keith Sebelius Lake (Norton Dam)
KS
36
n/a
35
134
1
Kirwin Reservoir
KS
32
n/a
98
313
0
Little Lake Alice Reservoir
NE
11
n/a
1
1
n/a
Lake Elwell (Tiber Reservoir)
MT
80
126
926
1329
249
Lima Reservoir
MT
n/a
86
84
100
0
Lake Minatare Reservoir
NE
33
n/a
59
59
n/a
Lake Tschida
ND
88
n/a
67
214
12
Lovewell Reservoir
KS
70
n/a
36
86
0
Marys Lake
CO
76
n/a
1
1
492
McGee Creek
OK
76
n/a
114
199
n/a
Merritt Reservoir
NE
93
n/a
67
67
n/a
Lake Nasworthy
TX
87
n/a
11
12
n/a
Nelson Reservoir
MT
70
n/a
79
79
0
Lake Thunderbird (Norman Dam)
OK
93
n/a
106
177
n/a
Lake Estes (Olympus Dam)
CO
74
n/a
3
3
12
Pathfinder Reservoir
WY
32
n/a
1070
1070
507
Pilot Butte Reservoir
WY
87
n/a
34
34
0
Pinewood Reservoir
CO
32
n/a
2
2
436
Pipestem Lake
ND
101
n/a
9
142
28
Pishkun Reservoir
MT
60
n/a
47
47
0
Pactola Reservoir
SD
84
n/a
56
99
27
Pueblo Reservoir
CO
64
n/a
323
350
n/a
Ruedi Reservoir
CO
64
n/a
102
102
54
Lake Meredith (Sanford Dam)
TX
30
n/a
896
1358
n/a
Seminoe Reservoir
WY
34
80
1017
1017
634
Shadow Mountain Reservoir
CO
93
n/a
18
18
21
Lake Sherburne
MT
68
116
66
66
445
Shadehill Reservoir
SD
85
n/a
120
350
23
Swift Reservoir
MT
n/a
n/a
30
36
n/a
Tom Steed Reservoir (Mtn Park Dam)
OK
81
n/a
97
117
n/a
Swanson Lake (Trenton Dam)
NE
45
n/a
110
244
1
Twin Buttes Reservoir
TX
14
n/a
186
640
n/a
Turquoise Lake (Sugarloaf Dam)
CO
65
n/a
129
129
n/a
Twin Lakes Reservoir
CO
71
n/a
141
141
n/a
Waconda Lake (Glen Elder Dam)
KS
78
n/a
219
942
12
Webster Reservoir
KS
15
n/a
76
259
0
Winters Creek Reservoir
NE
30
n/a
3
3
n/a
Willow Creek Reservoir
MT
13
n/a
32
32
0
Willow Creek Reservoir
CO
67
n/a
11
11
7
Last Updated: 1/ 7/2026