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: 2026MAY08                                                                                        
                                                                        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    5767.75     52640     193      30   37.25   99819    34      69        
 PBR      PILOT BUTTE OFFSTREAM, 22 MILES NW OF RIVERTON, WY 5454.37     28820     116     116    5.63    4901    85     105        
 BOYR     BOYSEN RESERVOIR, THERMOPOLIS, WYOMING             4711.72    516930     701     917   13.28  224664    69      99        
 ANCR     ANCHOR RESERVOIR, SOUTH FORK OWL CREEK, WYOMING    6371.23       998      11      21   69.77   16230     5     141        
 BBR      BUFFALO BILL RESERVOIR ON SHOSHONE RIVER, WYOMING  5364.65    430520    1268    2008   28.85  216045    66     107        
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MONTANA AREA OFFICE
 
   Big Horn River
 BHR      BIGHORN LAKE, MONTANA                              3614.94    783990    1443    1504   25.06  236583    76     104        
 BHSX     BIGHORN RIVER BELOW BIA CANAL, MT                  3186.52                      1588                           100        
 
   Upper Missouri River Basin
 LIMR     LIMA RES UPSTREAM OF CLARK CANYON RES, MONTANA     6579.08     63434      51       2    8.92   21591    74     109        
 CCR      CLARK CANYON RESERVOIR, BEAVERHEAD RVR NR DILLON,  5531.71    108411      87     291   14.39   65956    62      84        
 HEBR     HEBGEN LAKE NEAR WEST YELLOWSTONE, MONTANA         6531.24    340295     821     576    3.63   45886    88     112        
 CFR      CANYON FERRY LAKE NEAR HELENA, MONTANA             3786.85   1552584    1972    3226   10.15  339304    82     105        
 
   Sun River Basin
 GIBR     GIBSON RESERVOIR, MONTANA                          4716.33     88686    2380    1581    7.67   10001    89     146        
 PSHR     PISHKUN RESERVOIR NEAR AUGUSTA, MONTANA            4368.93     45080    1125    1170    1.07    1614    96     113        
 WCR      WILLOW CREEK RESERVOIR, 6 MILES NW AUGUSTA, MONTAN 4132.77     19800      92       0    9.23   12048    62      74        
 
   Marias River Basin
 SWTR     SWIFT RESERVOIR, BIRCH CREEK, MONTANA              ******  NO DATA Within Lookback Period to 2025OCT20 ******             
 LER      LAKE ELWELL SPILLWAY TRANSDUCER, MONTANA           2988.72    844213    1508     505    4.28   81436    91     112        
 
   Milk River Basin
 SHER     LAKE SHERBURNE, SWIFT CURRENT CREEK NEAR BABB, MT  4776.63     47902     475     468   11.37   18245    72     180        
 FRR      FRESNO RESERVOIR NEAR HAVRE, MONTANA               2566.32     54252     501      92    8.68   37494    59      81        
 NELR     NELSON RESERVOIR AT DAM 10 MILES NW OF SACO, MT    2216.16     57396                    5.44   21554    72      85