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: 2026SEP27                                                                                        
                                                                        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    5773.12     64702     129      24   31.88   87757    42      94        
 PBR      PILOT BUTTE OFFSTREAM, 22 MILES NW OF RIVERTON, WY 5447.82     23552      -8       0   12.18   10169    69     170        
 BOYR     BOYSEN RESERVOIR, THERMOPOLIS, WYOMING             4710.04    493249     642     782   14.96  248345    66      90        
 ANCR     ANCHOR RESERVOIR, SOUTH FORK OWL CREEK, WYOMING    6369.63       891       2       4   71.37   16337     5     202        
 BBR      BUFFALO BILL RESERVOIR ON SHOSHONE RIVER, WYOMING  5364.54    429894     288    1602   28.96  216671    66      94        
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MONTANA AREA OFFICE
 
   Big Horn River
 BHR      BIGHORN LAKE, MONTANA                              3623.96    845310    2324    2015   16.04  175263    82      97        
 BHSX     BIGHORN RIVER BELOW BIA CANAL, MT                  3190.38                      1689                           124        
 
   Upper Missouri River Basin
 LIMR     LIMA RES UPSTREAM OF CLARK CANYON RES, MONTANA     6566.87     22632      15      15   21.13   62393    26     100        
 CCR      CLARK CANYON RESERVOIR, BEAVERHEAD RVR NR DILLON,  5515.21     53983     115      25   30.89  120384    30      80        
 HEBR     HEBGEN LAKE NEAR WEST YELLOWSTONE, MONTANA         6530.35    329783     371     665    4.52   56398    85      98        
 CFR      CANYON FERRY LAKE NEAR HELENA, MONTANA             3785.16   1500253    3263    3263   11.84  391635    79      96        
 
   Sun River Basin
 GIBR     GIBSON RESERVOIR, MONTANA                          4618.69      8737     252     331  105.31   89950     8      92        
 PSHR     PISHKUN RESERVOIR NEAR AUGUSTA, MONTANA            4346.01     19046      63      63   23.99   27648    40      67        
 WCR      WILLOW CREEK RESERVOIR, 6 MILES NW AUGUSTA, MONTAN 4126.17     12959      46       0   15.83   18889    40      81        
 
   Marias River Basin
 SWTR     SWIFT RESERVOIR, BIRCH CREEK, MONTANA              ******  NO DATA Within Lookback Period to 2026MAR11 ******             
 LER      LAKE ELWELL SPILLWAY TRANSDUCER, MONTANA           2988.06    833311     924     509    4.94   92338    90     104        
 
   Milk River Basin
 SHER     LAKE SHERBURNE, SWIFT CURRENT CREEK NEAR BABB, MT  4742.20     10171       9      21   45.80   55976    15      59        
 FRR      FRESNO RESERVOIR NEAR HAVRE, MONTANA               2566.15     53759     378      43    8.85   37987    58     133        
 NELR     NELSON RESERVOIR AT DAM 10 MILES NW OF SACO, MT    2216.52     58712    -111       0    5.08   20238    74     101