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Reservoir	Location	% Full	SWE % of Avg	Full Capacity (kaf)	Total Capacity (kaf)	Outflow (cfs)
Angostura Reservoir	SD	59	n/a	123	123	1
Alcova Reservoir	WY	86	n/a	184	184	n/a
Lake Altus	OK	26	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	61	103	647	647	162
Bighorn Lake (Yellowtail)	MT	81	96	1011	1279	1973
Box Butte Reservoir	NE	38	n/a	29	29	n/a
Belle Fourche Reservoir	SD	84	n/a	173	173	0
Bull Lake Reservoir	WY	26	100	152	152	n/a
Bonny Lake	CO	n/a	n/a	41	170	n/a
Boysen Reservoir	WY	70	96	742	893	594
Calamus Reservior	NE	80	n/a	127	127	n/a
Carter Lake Reservoir	CO	92	n/a	112	112	n/a
Cedar Bluff Reservoir	KS	n/a	n/a	172	364	n/a
Choke Canyon Reservoir	TX	8	n/a	695	695	n/a
Clark Canyon Reservoir	MT	56	81	174	253	35
Canyon Ferry Lake	MT	77	81	1892	1993	3865
Cheney Reservoir	KS	116	n/a	167	248	n/a
Fort Cobb Reservoir	OK	98	n/a	74	136	n/a
Davis Creek Reservoir	NE	41	n/a	31	31	n/a
Deerfield Reservoir	SD	95	n/a	16	16	10
E. A. Patterson Lake	ND	98	n/a	9	9	52
Enders Reservoir	NE	20	n/a	43	73	n/a
Flatiron Reservoir	CO	80	n/a	1	1	535
Foss Reservoir	OK	97	n/a	169	350	n/a
Fresno Reservoir	MT	31	58	93	93	41
Gibson Reservoir	MT	51	85	99	99	244
Glendo Reservoir	WY	55	35	517	789	n/a
Lake Granby	CO	63	n/a	540	540	28
Green Mountain Reservoir	CO	38	n/a	154	154	146
Gray Reef Reservoir	WY	n/a	n/a	2	2	n/a
Guernsey Reservoir	WY	n/a	n/a	46	46	n/a
Hugh Butler Lake (Red Willow Dam)	NE	43	n/a	36	85	n/a
Harlan County Lake	NE	n/a	n/a	314	814	n/a
Hebgen Lake	MT	81	73	386	400	699
Horsetooth Reservoir	CO	90	n/a	157	157	0
Harry Strunk Lake (Medicine Creek)	NE	91	n/a	36	88	n/a
Helena Valley Reservoir	MT	77	n/a	10	10	n/a
Jamestown Reservoir	ND	88	n/a	32	221	0
Keyhole Reservoir	WY	59	n/a	189	329	0
Kortes Reservoir	WY	n/a	n/a	5	5	n/a
Keith Sebelius Lake (Norton Dam)	KS	n/a	n/a	35	134	n/a
Kirwin Reservoir	KS	33	n/a	98	313	n/a
Little Lake Alice Reservoir	NE	n/a	n/a	1	1	n/a
Lake Elwell (Tiber Reservoir)	MT	82	93	926	1329	257
Lima Reservoir	MT	43	65	84	100	0
Lake Minatare Reservoir	NE	30	n/a	59	59	n/a
Lake Tschida	ND	97	n/a	67	214	149
Lovewell Reservoir	KS	n/a	n/a	36	86	n/a
Marys Lake	CO	67	n/a	1	1	529
McGee Creek	OK	75	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	68	n/a	79	79	0
Lake Thunderbird (Norman Dam)	OK	93	n/a	106	177	n/a
Lake Estes (Olympus Dam)	CO	73	n/a	3	3	16
Pathfinder Reservoir	WY	33	n/a	1070	1070	n/a
Pilot Butte Reservoir	WY	86	n/a	34	34	0
Pinewood Reservoir	CO	59	n/a	2	2	547
Pipestem Lake	ND	101	n/a	9	142	17
Pishkun Reservoir	MT	60	n/a	47	47	0
Pactola Reservoir	SD	84	n/a	56	99	26
Pueblo Reservoir	CO	67	n/a	323	350	n/a
Ruedi Reservoir	CO	62	n/a	102	102	40
Lake Meredith (Sanford Dam)	TX	30	n/a	896	1358	n/a
Seminoe Reservoir	WY	32	66	1017	1017	n/a
Shadow Mountain Reservoir	CO	93	n/a	18	18	21
Lake Sherburne	MT	76	8	66	66	0
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	80	n/a	97	117	n/a
Swanson Lake (Trenton Dam)	NE	n/a	n/a	110	244	n/a
Twin Buttes Reservoir	TX	13	n/a	186	640	n/a
Turquoise Lake (Sugarloaf Dam)	CO	55	n/a	129	129	n/a
Twin Lakes Reservoir	CO	73	n/a	141	141	n/a
Waconda Lake (Glen Elder Dam)	KS	n/a	n/a	219	942	n/a
Webster Reservoir	KS	n/a	n/a	76	259	n/a
Winters Creek Reservoir	NE	n/a	n/a	3	3	n/a
Willow Creek Reservoir	MT	25	n/a	32	32	0
Willow Creek Reservoir	CO	70	n/a	11	11	7

Last Updated: 2/17/2026