G R E A T    P L A I N S    R E G I O N A L    O F F I C E                              
 
       Daily Reservoir Report for: 2026MAY28                                                                                        
                                                                        TOTAL   DAILY   DAILY   FEET   SPACE  PERCENT  HISTORIC   
                                                            ELEVATION  STORAGE  INFLOW  OUTFLO   TO   TO FILL   FULL  DAILY AVE   
 SITE            RESERVOIR NAME                              (feet)    (ac-ft)  (cfs)   (cfs)   FILL  (ac-ft)    (%)     (%)      
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   Big Horn River Basin
 BLR      BULL LAKE RESERVOIR ON BULL LAKE CREEK, WYOMING    5772.92     64237     830      62   32.08   88222    42      72        
 PBR      PILOT BUTTE OFFSTREAM, 22 MILES NW OF RIVERTON, WY 5448.52     24093     532     603   11.48    9628    71      94        
 BOYR     BOYSEN RESERVOIR, THERMOPOLIS, WYOMING             4711.55    514488    1359    1070   13.45  227106    69      95        
 ANCR     ANCHOR RESERVOIR, SOUTH FORK OWL CREEK, WYOMING    6375.80      1346     142      67   65.20   15882     7      97        
 BBR      BUFFALO BILL RESERVOIR ON SHOSHONE RIVER, WYOMING  5368.72    458979    4948    1960   24.78  187586    70     104        
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MONTANA AREA OFFICE
 
   Big Horn River
 BHR      BIGHORN LAKE, MONTANA                              3618.38    805791    2843    1818   21.62  214782    78     100        
 BHSX     BIGHORN RIVER BELOW BIA CANAL, MT                  3188.71                      1514                           103        
 
   Upper Missouri River Basin
 LIMR     LIMA RES UPSTREAM OF CLARK CANYON RES, MONTANA     6579.01     63097     150     491    8.99   21928    74     101        
 CCR      CLARK CANYON RESERVOIR, BEAVERHEAD RVR NR DILLON,  5527.86     93485      87     534   18.24   80882    53      76        
 HEBR     HEBGEN LAKE NEAR WEST YELLOWSTONE, MONTANA         6533.60    369720    1057     470    1.27   16461    95     108        
 CFR      CANYON FERRY LAKE NEAR HELENA, MONTANA             3787.51   1573183     693    3374    9.49  318705    83      99        
 
   Sun River Basin
 GIBR     GIBSON RESERVOIR, MONTANA                          4723.83     98460    4256    4262    0.17     227    99     113        
 PSHR     PISHKUN RESERVOIR NEAR AUGUSTA, MONTANA            4368.80     44885    1307    1435    1.20    1809    96      98        
 WCR      WILLOW CREEK RESERVOIR, 6 MILES NW AUGUSTA, MONTAN 4135.26     22787     118       0    6.74    9061    71      77        
 
   Marias River Basin
 SWTR     SWIFT RESERVOIR, BIRCH CREEK, MONTANA              ******  NO DATA Within Lookback Period to 2025NOV09 ******             
 LER      LAKE ELWELL SPILLWAY TRANSDUCER, MONTANA           2990.55    875200    1827     610    2.45   50449    94     108        
 
   Milk River Basin
 SHER     LAKE SHERBURNE, SWIFT CURRENT CREEK NEAR BABB, MT  4782.59     57123     925     488    5.41    9024    86     155        
 FRR      FRESNO RESERVOIR NEAR HAVRE, MONTANA               2560.48     39154     550    1315   14.52   52592    42      60        
 NELR     NELSON RESERVOIR AT DAM 10 MILES NW OF SACO, MT    2213.22     47337     -58     392    8.38   31613    59      72