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Reservoir	Location	% Full	SWE % of Avg	Full Capacity (kaf)	Total Capacity (kaf)	Outflow (cfs)
Angostura Reservoir	SD	48	n/a	123	123	1
Alcova Reservoir	WY	86	n/a	184	184	475
Lake Altus	OK	33	n/a	129	149	0
Lake Alice Reservoir	NE	0	n/a	11	11	n/a
Arbuckle Reservoir	OK	98	n/a	72	108	n/a
Buffalo Bill Reservoir	WY	61	49	647	647	213
Bighorn Lake (Yellowtail)	MT	86	48	1011	1279	1506
Box Butte Reservoir	NE	n/a	n/a	29	29	n/a
Belle Fourche Reservoir	SD	38	n/a	173	173	0
Bull Lake Reservoir	WY	51	78	152	152	683
Bonny Lake	CO	0	n/a	41	170	2
Boysen Reservoir	WY	73	65	742	893	417
Calamus Reservior	NE	66	n/a	127	127	n/a
Carter Lake Reservoir	CO	49	n/a	112	112	n/a
Cedar Bluff Reservoir	KS	31	n/a	172	364	0
Choke Canyon Reservoir	TX	20	n/a	695	695	n/a
Clark Canyon Reservoir	MT	38	140	174	253	27
Canyon Ferry Lake	MT	80	57	1892	1993	2988
Cheney Reservoir	KS	96	n/a	167	248	n/a
Fort Cobb Reservoir	OK	101	n/a	74	136	n/a
Davis Creek Reservoir	NE	44	n/a	31	31	n/a
Deerfield Reservoir	SD	80	n/a	16	16	25
E. A. Patterson Lake	ND	67	n/a	9	9	0
Enders Reservoir	NE	17	n/a	43	73	2
Flatiron Reservoir	CO	84	n/a	1	1	n/a
Foss Reservoir	OK	84	n/a	169	350	n/a
Fresno Reservoir	MT	61	33	93	93	44
Gibson Reservoir	MT	5	48	99	99	230
Glendo Reservoir	WY	35	65	517	789	23
Lake Granby	CO	48	n/a	540	540	22
Green Mountain Reservoir	CO	11	n/a	154	154	66
Gray Reef Reservoir	WY	86	n/a	2	2	459
Guernsey Reservoir	WY	17	n/a	46	46	2
Hugh Butler Lake (Red Willow Dam)	NE	40	n/a	36	85	2
Harlan County Lake	NE	54	n/a	314	814	0
Hebgen Lake	MT	84	20	386	400	641
Horsetooth Reservoir	CO	73	n/a	157	157	0
Harry Strunk Lake (Medicine Creek)	NE	56	n/a	36	88	1
Helena Valley Reservoir	MT	87	n/a	10	10	n/a
Jamestown Reservoir	ND	88	n/a	32	221	60
Keyhole Reservoir	WY	43	n/a	189	329	0
Kortes Reservoir	WY	99	n/a	5	5	535
Keith Sebelius Lake (Norton Dam)	KS	30	n/a	35	134	1
Kirwin Reservoir	KS	18	n/a	98	313	n/a
Little Lake Alice Reservoir	NE	11	n/a	1	1	n/a
Lake Elwell (Tiber Reservoir)	MT	88	51	926	1329	515
Lima Reservoir	MT	30	80	84	100	14
Lake Minatare Reservoir	NE	22	n/a	59	59	n/a
Lake Tschida	ND	69	n/a	67	214	10
Lovewell Reservoir	KS	88	n/a	36	86	0
Marys Lake	CO	79	n/a	1	1	112
McGee Creek	OK	75	n/a	114	199	n/a
Merritt Reservoir	NE	90	n/a	67	67	n/a
Lake Nasworthy	TX	87	n/a	11	12	n/a
Nelson Reservoir	MT	71	n/a	79	79	0
Lake Thunderbird (Norman Dam)	OK	89	n/a	106	177	1
Lake Estes (Olympus Dam)	CO	54	n/a	3	3	31
Pathfinder Reservoir	WY	19	n/a	1070	1070	419
Pilot Butte Reservoir	WY	83	n/a	34	34	0
Pinewood Reservoir	CO	55	n/a	2	2	30
Pipestem Lake	ND	n/a	n/a	9	142	n/a
Pishkun Reservoir	MT	47	n/a	47	47	0
Pactola Reservoir	SD	72	n/a	56	99	15
Pueblo Reservoir	CO	48	n/a	323	350	n/a
Ruedi Reservoir	CO	37	n/a	102	102	42
Lake Meredith (Sanford Dam)	TX	30	n/a	896	1358	n/a
Seminoe Reservoir	WY	21	42	1017	1017	531
Shadow Mountain Reservoir	CO	92	n/a	18	18	46
Lake Sherburne	MT	21	63	66	66	0
Shadehill Reservoir	SD	73	n/a	120	350	21
Swift Reservoir	MT	n/a	n/a	30	36	n/a
Tom Steed Reservoir (Mtn Park Dam)	OK	72	n/a	97	117	n/a
Swanson Lake (Trenton Dam)	NE	38	n/a	110	244	1
Twin Buttes Reservoir	TX	6	n/a	186	640	n/a
Turquoise Lake (Sugarloaf Dam)	CO	54	n/a	129	129	n/a
Twin Lakes Reservoir	CO	76	n/a	141	141	n/a
Waconda Lake (Glen Elder Dam)	KS	114	n/a	219	942	500
Webster Reservoir	KS	14	n/a	76	259	0
Winters Creek Reservoir	NE	12	n/a	3	3	n/a
Willow Creek Reservoir	MT	60	n/a	32	32	0
Willow Creek Reservoir	CO	63	n/a	11	11	7

Last Updated: 11/ 9/2026