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: 2026MAR04                                                                                        
                                                                        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    5761.68     40030                   43.32  112429    26      54        
 PBR      PILOT BUTTE OFFSTREAM, 22 MILES NW OF RIVERTON, WY 5454.46     28896      -8       0    5.54    4825    85     105        
 BOYR     BOYSEN RESERVOIR, THERMOPOLIS, WYOMING             4712.15    523127     672     601   12.85  218467    70      96        
 ANCR     ANCHOR RESERVOIR, SOUTH FORK OWL CREEK, WYOMING    6367.12       739       1       0   73.88   16489     4     183        
 BBR      BUFFALO BILL RESERVOIR ON SHOSHONE RIVER, WYOMING  5359.83    398854     295     165   33.67  247711    61      91        
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MONTANA AREA OFFICE
 
   Big Horn River
 BHR      BIGHORN LAKE, MONTANA                              3618.89    809168    1418    1991   21.11  211405    79     103        
 BHSX     BIGHORN RIVER BELOW BIA CANAL, MT                  3186.91                      2050                            95        
 
   Upper Missouri River Basin
 LIMR     LIMA RES UPSTREAM OF CLARK CANYON RES, MONTANA     6572.27     35939      15       0   15.73   49086    42     107        
 CCR      CLARK CANYON RESERVOIR, BEAVERHEAD RVR NR DILLON,  5530.25    102599     154      35   15.85   71768    58      89        
 HEBR     HEBGEN LAKE NEAR WEST YELLOWSTONE, MONTANA         6528.84    312601     474     698    6.03   73580    80     104        
 CFR      CANYON FERRY LAKE NEAR HELENA, MONTANA             3783.11   1437872    2857    3009   13.89  454016    76     100        
 
   Sun River Basin
 GIBR     GIBSON RESERVOIR, MONTANA                          4681.46     49774     217     236   42.54   48913    50     217        
 PSHR     PISHKUN RESERVOIR NEAR AUGUSTA, MONTANA            4355.67     27814       0       0   14.33   18880    59      96        
 WCR      WILLOW CREEK RESERVOIR, 6 MILES NW AUGUSTA, MONTAN 4121.43      9056      99       0   20.57   22792    28      37        
 
   Marias River Basin
 SWTR     SWIFT RESERVOIR, BIRCH CREEK, MONTANA              ******  NO DATA Within Lookback Period to 2025AUG16 ******             
 LER      LAKE ELWELL SPILLWAY TRANSDUCER, MONTANA           2983.92    767014     563     248    9.08  158635    82     107        
 
   Milk River Basin
 SHER     LAKE SHERBURNE, SWIFT CURRENT CREEK NEAR BABB, MT  4779.32     51966      53       0    8.68   14181    78     145        
 FRR      FRESNO RESERVOIR NEAR HAVRE, MONTANA               2555.36     28338      30      40   19.64   63408    30      75        
 NELR     NELSON RESERVOIR AT DAM 10 MILES NW OF SACO, MT    2214.85     52744     -17       0    6.75   26206    66     102