Notice: A map-based version currently in development will be released soon.
ReservoirLocation% FullSWE % of AvgFull Capacity (kaf)Total Capacity (kaf)Outflow (cfs)
Angostura ReservoirSD76n/a1231233
Alcova ReservoirWY98n/a1841841723
Lake AltusOK64n/a1291490
Lake Alice ReservoirNE54n/a1111n/a
Arbuckle ReservoirOK119n/a72108n/a
Buffalo Bill ReservoirWY59966476471437
Bighorn Lake (Yellowtail)MT810101112791962
Box Butte ReservoirNE51n/a2929n/a
Belle Fourche ReservoirSD87n/a1731730
Bull Lake ReservoirWY278915215256
Bonny LakeCO0n/a411704
Boysen ReservoirWY6998742893952
Calamus ReserviorNE95n/a127127n/a
Carter Lake ReservoirCO93n/a112112n/a
Cedar Bluff ReservoirKS38n/a1723640
Choke Canyon ReservoirTX14n/a695695n/a
Clark Canyon ReservoirMT847717425365
Canyon Ferry LakeMT7988189219934356
Cheney ReservoirKS63n/a167248n/a
Fort Cobb ReservoirOK94n/a74136n/a
Davis Creek ReservoirNE59n/a3131n/a
Deerfield ReservoirSD95n/a161618
E. A. Patterson LakeND89n/a990
Enders ReservoirNE19n/a43732
Flatiron ReservoirCO20n/a11n/a
Foss ReservoirOK90n/a169350n/a
Fresno ReservoirMT46n/a939343
Gibson ReservoirMT37529999265
Glendo ReservoirWY7159517789596
Lake GranbyCO70n/a54054076
Green Mountain ReservoirCO37n/a154154124
Gray Reef ReservoirWY85n/a221745
Guernsey ReservoirWY63n/a4646231
Hugh Butler Lake (Red Willow Dam)NE42n/a36852
Harlan County LakeNE75n/a3148140
Hebgen LakeMT8180386400778
Horsetooth ReservoirCO94n/a157157105
Harry Strunk Lake (Medicine Creek)NE102n/a368855
Helena Valley ReservoirMT96n/a1010n/a
Jamestown ReservoirND103n/a32221314
Keyhole ReservoirWY62n/a1893290
Kortes ReservoirWY100n/a551756
Keith Sebelius Lake (Norton Dam)KS45n/a351341
Kirwin ReservoirKS48n/a983130
Little Lake Alice ReservoirNE33n/a11n/a
Lake Elwell (Tiber Reservoir)MT75829261329412
Lima ReservoirMT8063841003
Lake Minatare ReservoirNE43n/a5959n/a
Lake TschidaND89n/a672140
Lovewell ReservoirKS93n/a36860
Marys LakeCO57n/a1129
McGee CreekOK105n/a114199n/a
Merritt ReservoirNE94n/a6767n/a
Lake NasworthyTX86n/a1112n/a
Nelson ReservoirMT94n/a797944
Lake Thunderbird (Norman Dam)OK152n/a106177n/a
Lake Estes (Olympus Dam)CO70n/a33130
Pathfinder ReservoirWY54n/a107010701688
Pilot Butte ReservoirWY86n/a34340
Pinewood ReservoirCO35n/a225
Pipestem LakeND194n/a914212
Pishkun ReservoirMT73n/a4747n/a
Pactola ReservoirSD85n/a569932
Pueblo ReservoirCO71n/a323350n/a
Ruedi ReservoirCO68n/a102102112
Lake Meredith (Sanford Dam)TX27n/a8961358n/a
Seminoe ReservoirWY4783101710171758
Shadow Mountain ReservoirCO91n/a1818256
Lake SherburneMT79806666185
Shadehill ReservoirSD75n/a12035021
Swift ReservoirMTn/an/a3036n/a
Tom Steed Reservoir (Mtn Park Dam)OK92n/a97117n/a
Swanson Lake (Trenton Dam)NE56n/a1102441
Twin Buttes ReservoirTX15n/a186640n/a
Turquoise Lake (Sugarloaf Dam)CO61n/a129129n/a
Twin Lakes ReservoirCO75n/a141141n/a
Waconda Lake (Glen Elder Dam)KS71n/a21994212
Webster ReservoirKS18n/a762590
Winters Creek ReservoirNE39n/a33n/a
Willow Creek ReservoirMT50n/a32320
Willow Creek ReservoirCO79n/a11117
Last Updated: 5/ 3/2025