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Reservoir	Location	% Full	SWE % of Avg	Full Capacity (kaf)	Total Capacity (kaf)	Outflow (cfs)
Angostura Reservoir	SD	63	n/a	123	123	1
Alcova Reservoir	WY	98	n/a	184	184	500
Lake Altus	OK	27	n/a	129	149	0
Lake Alice Reservoir	NE	0	n/a	11	11	n/a
Arbuckle Reservoir	OK	104	n/a	72	108	n/a
Buffalo Bill Reservoir	WY	67	91	647	647	2008
Bighorn Lake (Yellowtail)	MT	78	79	1011	1279	1505
Box Butte Reservoir	NE	44	n/a	29	29	n/a
Belle Fourche Reservoir	SD	93	n/a	173	173	172
Bull Lake Reservoir	WY	35	127	152	152	31
Bonny Lake	CO	0	n/a	41	170	2
Boysen Reservoir	WY	70	65	742	893	917
Calamus Reservior	NE	94	n/a	127	127	n/a
Carter Lake Reservoir	CO	89	n/a	112	112	n/a
Cedar Bluff Reservoir	KS	33	n/a	172	364	0
Choke Canyon Reservoir	TX	7	n/a	695	695	n/a
Clark Canyon Reservoir	MT	62	21	174	253	291
Canyon Ferry Lake	MT	82	78	1892	1993	3227
Cheney Reservoir	KS	106	n/a	167	248	n/a
Fort Cobb Reservoir	OK	97	n/a	74	136	n/a
Davis Creek Reservoir	NE	81	n/a	31	31	n/a
Deerfield Reservoir	SD	95	n/a	16	16	10
E. A. Patterson Lake	ND	82	n/a	9	9	0
Enders Reservoir	NE	20	n/a	43	73	2
Flatiron Reservoir	CO	72	n/a	1	1	404
Foss Reservoir	OK	95	n/a	169	350	n/a
Fresno Reservoir	MT	58	n/a	93	93	93
Gibson Reservoir	MT	90	61	99	99	1581
Glendo Reservoir	WY	73	3	517	789	25
Lake Granby	CO	64	n/a	540	540	77
Green Mountain Reservoir	CO	30	n/a	154	154	65
Gray Reef Reservoir	WY	83	n/a	2	2	502
Guernsey Reservoir	WY	38	n/a	46	46	1
Hugh Butler Lake (Red Willow Dam)	NE	43	n/a	36	85	2
Harlan County Lake	NE	68	n/a	314	814	0
Hebgen Lake	MT	88	46	386	400	577
Horsetooth Reservoir	CO	90	n/a	157	157	45
Harry Strunk Lake (Medicine Creek)	NE	94	n/a	36	88	1
Helena Valley Reservoir	MT	94	n/a	10	10	n/a
Jamestown Reservoir	ND	99	n/a	32	221	338
Keyhole Reservoir	WY	58	n/a	189	329	0
Kortes Reservoir	WY	100	n/a	5	5	533
Keith Sebelius Lake (Norton Dam)	KS	36	n/a	35	134	1
Kirwin Reservoir	KS	33	n/a	98	313	0
Little Lake Alice Reservoir	NE	11	n/a	1	1	n/a
Lake Elwell (Tiber Reservoir)	MT	91	66	926	1329	506
Lima Reservoir	MT	75	22	84	100	3
Lake Minatare Reservoir	NE	0	n/a	59	59	n/a
Lake Tschida	ND	90	n/a	67	214	53
Lovewell Reservoir	KS	86	n/a	36	86	0
Marys Lake	CO	57	n/a	1	1	437
McGee Creek	OK	92	n/a	114	199	n/a
Merritt Reservoir	NE	97	n/a	67	67	n/a
Lake Nasworthy	TX	86	n/a	11	12	n/a
Nelson Reservoir	MT	73	n/a	79	79	n/a
Lake Thunderbird (Norman Dam)	OK	94	n/a	106	177	n/a
Lake Estes (Olympus Dam)	CO	72	n/a	3	3	69
Pathfinder Reservoir	WY	31	n/a	1070	1070	622
Pilot Butte Reservoir	WY	85	n/a	34	34	116
Pinewood Reservoir	CO	72	n/a	2	2	434
Pipestem Lake	ND	398	n/a	9	142	116
Pishkun Reservoir	MT	97	n/a	47	47	1171
Pactola Reservoir	SD	86	n/a	56	99	34
Pueblo Reservoir	CO	64	n/a	323	350	n/a
Ruedi Reservoir	CO	65	n/a	102	102	112
Lake Meredith (Sanford Dam)	TX	29	n/a	896	1358	n/a
Seminoe Reservoir	WY	34	45	1017	1017	537
Shadow Mountain Reservoir	CO	92	n/a	18	18	22
Lake Sherburne	MT	72	176	66	66	468
Shadehill Reservoir	SD	86	n/a	120	350	23
Swift Reservoir	MT	n/a	n/a	30	36	n/a
Tom Steed Reservoir (Mtn Park Dam)	OK	74	n/a	97	117	n/a
Swanson Lake (Trenton Dam)	NE	51	n/a	110	244	1
Twin Buttes Reservoir	TX	12	n/a	186	640	n/a
Turquoise Lake (Sugarloaf Dam)	CO	66	n/a	129	129	n/a
Twin Lakes Reservoir	CO	65	n/a	141	141	n/a
Waconda Lake (Glen Elder Dam)	KS	77	n/a	219	942	27
Webster Reservoir	KS	15	n/a	76	259	0
Winters Creek Reservoir	NE	13	n/a	3	3	n/a
Willow Creek Reservoir	MT	62	n/a	32	32	0
Willow Creek Reservoir	CO	64	n/a	11	11	7

Last Updated: 5/ 9/2026