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Reservoir	Location	% Full	SWE % of Avg	Full Capacity (kaf)	Total Capacity (kaf)	Outflow (cfs)
Angostura Reservoir	SD	60	n/a	123	123	1
Alcova Reservoir	WY	85	n/a	184	184	1156
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	62	100	647	647	166
Bighorn Lake (Yellowtail)	MT	80	97	1011	1279	1977
Box Butte Reservoir	NE	40	n/a	29	29	n/a
Belle Fourche Reservoir	SD	88	n/a	173	173	0
Bull Lake Reservoir	WY	26	102	152	152	25
Bonny Lake	CO	0	n/a	41	170	2
Boysen Reservoir	WY	71	100	742	893	492
Calamus Reservior	NE	83	n/a	127	127	n/a
Carter Lake Reservoir	CO	99	n/a	112	112	n/a
Cedar Bluff Reservoir	KS	34	n/a	172	364	0
Choke Canyon Reservoir	TX	8	n/a	695	695	n/a
Clark Canyon Reservoir	MT	60	87	174	253	35
Canyon Ferry Lake	MT	76	84	1892	1993	3015
Cheney Reservoir	KS	110	n/a	167	248	n/a
Fort Cobb Reservoir	OK	98	n/a	74	136	n/a
Davis Creek Reservoir	NE	40	n/a	31	31	n/a
Deerfield Reservoir	SD	95	n/a	16	16	10
E. A. Patterson Lake	ND	92	n/a	9	9	11
Enders Reservoir	NE	20	n/a	43	73	2
Flatiron Reservoir	CO	72	n/a	1	1	404
Foss Reservoir	OK	97	n/a	169	350	n/a
Fresno Reservoir	MT	31	9	93	93	41
Gibson Reservoir	MT	51	82	99	99	221
Glendo Reservoir	WY	59	49	517	789	18
Lake Granby	CO	60	n/a	540	540	27
Green Mountain Reservoir	CO	37	n/a	154	154	187
Gray Reef Reservoir	WY	95	n/a	2	2	1198
Guernsey Reservoir	WY	37	n/a	46	46	3
Hugh Butler Lake (Red Willow Dam)	NE	43	n/a	36	85	2
Harlan County Lake	NE	65	n/a	314	814	0
Hebgen Lake	MT	81	72	386	400	699
Horsetooth Reservoir	CO	95	n/a	157	157	0
Harry Strunk Lake (Medicine Creek)	NE	82	n/a	36	88	300
Helena Valley Reservoir	MT	75	n/a	10	10	n/a
Jamestown Reservoir	ND	95	n/a	32	221	0
Keyhole Reservoir	WY	59	n/a	189	329	0
Kortes Reservoir	WY	102	n/a	5	5	642
Keith Sebelius Lake (Norton Dam)	KS	37	n/a	35	134	1
Kirwin Reservoir	KS	34	n/a	98	313	n/a
Little Lake Alice Reservoir	NE	11	n/a	1	1	n/a
Lake Elwell (Tiber Reservoir)	MT	83	89	926	1329	249
Lima Reservoir	MT	43	76	84	100	0
Lake Minatare Reservoir	NE	30	n/a	59	59	n/a
Lake Tschida	ND	96	n/a	67	214	94
Lovewell Reservoir	KS	74	n/a	36	86	0
Marys Lake	CO	32	n/a	1	1	343
McGee Creek	OK	80	n/a	114	199	n/a
Merritt Reservoir	NE	92	n/a	67	67	n/a
Lake Nasworthy	TX	86	n/a	11	12	n/a
Nelson Reservoir	MT	67	n/a	79	79	0
Lake Thunderbird (Norman Dam)	OK	92	n/a	106	177	n/a
Lake Estes (Olympus Dam)	CO	69	n/a	3	3	26
Pathfinder Reservoir	WY	33	n/a	1070	1070	976
Pilot Butte Reservoir	WY	86	n/a	34	34	0
Pinewood Reservoir	CO	63	n/a	2	2	378
Pipestem Lake	ND	114	n/a	9	142	17
Pishkun Reservoir	MT	60	n/a	47	47	0
Pactola Reservoir	SD	84	n/a	56	99	24
Pueblo Reservoir	CO	68	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	71	1017	1017	642
Shadow Mountain Reservoir	CO	93	n/a	18	18	22
Lake Sherburne	MT	80	14	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	79	n/a	97	117	n/a
Swanson Lake (Trenton Dam)	NE	48	n/a	110	244	50
Twin Buttes Reservoir	TX	13	n/a	186	640	n/a
Turquoise Lake (Sugarloaf Dam)	CO	56	n/a	129	129	n/a
Twin Lakes Reservoir	CO	69	n/a	141	141	n/a
Waconda Lake (Glen Elder Dam)	KS	79	n/a	219	942	12
Webster Reservoir	KS	15	n/a	76	259	0
Winters Creek Reservoir	NE	22	n/a	3	3	n/a
Willow Creek Reservoir	MT	31	n/a	32	32	0
Willow Creek Reservoir	CO	73	n/a	11	11	7

Last Updated: 3/ 9/2026