B A S I N   S U M M A R Y  O F
                        S N O W    C O U R S E    D A T A

                                     MAY   1997


     SNOW COURSE         ELEVATION    DATE    SNOW   WATER     LAST  AVERAGE 
                                             DEPTH  CONTENT    YEAR   1961-90
--------------------------------------------------------------------------------
 SNAKE RIVER BASIN 
     BASE CAMP PILLOW       7030    5/01/97   ---     26.1     20.9     10.7
     BLACK BEAR PILLOW      7950    5/01/97   ---     68.9     50.1     39.8
     BLIND BULL PILLOW      8900    5/01/97   ---     44.0     38.7     22.7
     BRYAN FLAT             6420    4/29/97    14      5.4      1.9      2.3
     CCC CAMP               7000    4/25/97    39     15.4     11.2      7.9
     COTTONWOOD CR PILLOW   7700    5/01/97   ---     32.0     29.8     20.0
     DARBY CANYON           8250    5/03/97    91     36.9     32.4     23.9
     EAST RIM DIV PILLOW    7930    5/01/97   ---     16.4     16.6     14.8
     ELBO RANCH             7100    4/30/97    42     15.4     15.5      9.0
     GLADE CREEK            7040    4/29/97    66     30.8     26.4     21.0
     GRASSY LAKE PILLOW     7270    5/01/97   ---     47.8     40.9     33.9
     GREYS BOUNDARY         5720    4/25/97    26     11.4      5.1      2.6
     GROS VENTRE PILLOW     8750    5/01/97   ---     23.2     19.8     13.9
     GROVER PARK DIVIDE     7000    4/25/97    26      9.9      6.5      7.9
     JACKPINE CREEK         7350    5/03/97    71     28.9     22.6     19.8
     LEWIS LAKE PILLOW      7850    5/01/97   ---     54.4     49.1     34.4
     LEWIS LAKE DIVIDE      7850    4/29/97   135     63.7     59.9     42.0
     PHILLIPS BENCH PILL.   8200    5/01/97   ---     42.7     38.0     29.5
     SALT RIVER PILLOW      7600    5/01/97   ---     20.2     14.6     10.8
     SNOW KING MTN          7660    4/30/97    39     16.2     13.8     12.4
     SPRING CRK. PILLOW     9000    5/01/97   ---     41.0     39.3     29.6
     TETON PASS W.S.        7740    4/29/97    99     44.9     36.7     27.1
     TOGWOTEE PASS PILLOW   9580    5/01/97   ---     37.4     35.2     28.3
     TWO OCEAN PILLOW       9240    5/01/97   ---     50.1     41.5     27.6
     WILLOW CREEK PILLOW    8450    5/01/97   ---     43.9     37.0     31.9
  
 UPPER YELLOWSTONE & MADISON RIVER BASINS                             
     BLACK BEAR PILLOW      7950    5/01/97   ---     68.9     50.1     39.8
     CANYON PILLOW          8090    5/01/97   ---     22.0     20.5     10.9
     FISHER CREEK PILLOW    9100    5/01/97   ---     60.4     50.6     38.7
     LAKE CAMP              7780    4/29/97    42     17.2     13.6      7.2
     LUPINE CREEK           7380    4/30/97    29     10.5      9.6      6.6
     MADISON PLT PILLOW     7750    5/01/97   ---     42.7     30.6     23.8
     MADISON PLATEAU        7750    5/02/97    86     41.2       --     22.2
     NORRIS BASIN           7500    4/28/97    26     10.7     12.5      7.5
     N.E. ENTRANCE PILLOW   7350    5/01/97   ---      8.6      9.2      5.9
     NORTHEAST ENTRANCE     7350    5/01/97    34     10.9      9.8      6.1
     OLD FAITHFUL           7400    5/01/97    51     19.5     18.5     10.0
     PARKERS PEAK PILLOW    9400    5/01/97   ---     36.8     31.8     23.7
     SYLVAN LAKE PILLOW     8420    5/01/97   ---     32.2       --     23.8
     TWENTY-ONE MILE        7150    4/28/97    48     20.4     19.0     14.8
     TWO OCEAN PILLOW       9240    5/01/97   ---     50.1     41.5     27.6
     WEST YELL'ST PILLOW    6700    4/28/97   ---      5.8      4.6      5.3
     WEST YELLOWSTONE       6700    4/28/97    26     10.6      8.3      7.1

  WIND RIVER BASIN                                                     
     BLUE RIDGE             9620    4/29/97    48     19.2     12.6     12.7
     BURROUGHS CRK PILLOW   8750    5/01/97   ---     24.2     22.7     12.9
     CASTLE CREEK           8400    4/28/97    12      4.3      5.6      2.0
     CHRISTINA LK PILLOW    9980    5/01/97   ---     22.8     16.1     18.0
     COLD SPRINGS PILLOW    9630    5/01/97   ---      9.1      6.6      6.8
     DU NOIR                8760    4/28/97    32     11.9      7.7      6.8
     GEYSER CREEK           8500    4/28/97    29     10.0      9.3      5.4
     GRANNIER MEADOWS       8860    4/29/97    60     19.8     15.6     15.1
     HOBBS PARK PILLOW     10100    5/01/97   ---     22.0     21.0     18.0
     LITTLE WARM PILLOW     9370    5/01/97   ---     19.5     17.6     10.4
     MIDDLE FORK            7420    4/29/97    18      9.8      4.2      5.0
     SOUTH PASS PILLOW      9040    5/01/97   ---     27.7     20.1     18.1
     ST LAWRENCE ALT PILL   8620    5/01/97   ---     11.0      5.3      5.4
     T CROSS RANCH          7900    4/28/97    20      7.9      6.8      3.6
     TOGWOTEE PASS PILLOW   9580    5/01/97   ---     37.4     35.2     28.3
     TOWNSEND CRK PILLOW    8700    5/01/97   ---     12.7     10.5      9.5
     YOUNTS PEAK PILLOW     8350    5/01/97   ---     24.7     25.0     18.3

BIG HORN RIVER BASIN                                                 
     BALD MOUNTAIN PILLOW   9380    5/01/97   ---     25.9     26.0     24.1
     BONE SPGS. PILLOW      9350    5/01/97   ---     21.2     23.9     18.4
     KIRWIN PILLOW          9550    5/01/97   ---     17.3     19.5     11.7
     LOST CREEK PILLOW      8080    5/01/97   ---     20.0     16.5     15.8
     MEDICINE LODGE LAKES   9340    4/26/97    49     15.0     13.1     12.5
     MIDDLE POWDER PILLOW   7760    5/01/97   ---     18.4     16.6     14.8
     ONION GULCH            8780    4/28/97    46     13.6     12.7      8.9
     OWL CREEK PILLOW       8980    5/01/97   ---      6.8      5.7      3.4
     POWDER RVR.PASS PILL   9480    5/01/97   ---     15.9     15.7     10.5
     RANGER CREEK           8120    4/26/97    35      9.9     10.0      8.1
     SHELL CREEK PILLOW     9580    5/01/97   ---     20.9     19.8     17.0
     TIMBER CREEK PILLOW    7950    5/01/97   ---      7.2      6.1      6.0
     TYRELL RANGER STA.     8300    4/28/97    27      6.2      8.4      7.5

  SHOSHONE & CLARKS FORK RIVER BASINS                                  
     BEARTOOTH LK. PILLOW   9280    5/01/97   ---     39.3     39.5     26.0
     BLACKWATER PILLOW      9780    5/01/97   ---     42.8     39.0     25.7
     CARTER MOUNTAIN        7950    4/29/97    19      5.1      4.9      6.0
     FISHER CREEK PILLOW    9100    5/01/97   ---     60.4     50.6     38.7
     EVENING STAR PILLOW    9200    5/01/97   ---     45.6     44.3     30.8
     MARQUETTE PILLOW       8760    5/01/97   ---     14.2     14.6      8.6
     PARKERS PEAK PILLOW    9400    5/01/97   ---     36.8     31.8     23.7
     N.E. ENTRANCE PILLOW   7350    5/01/97   ---      8.6      9.2      5.9
     NORTHEAST ENTRANCE     7350    5/01/97    34     10.9      9.8      6.1
     PARKERS PEAK PILLOW    9400    5/01/97   ---     36.8     31.8     23.7
     SYLVAN ROAD PILLOW     7120    5/01/97   ---     16.5     17.9      7.9
     WHITE MILL PILLOW      8700    5/01/97   ---     42.5     39.5     26.3
     WOLVERINE PILLOW       7650    5/01/97   ---     12.5     13.8      8.1
     YOUNTS PEAK PILLOW     8350    5/01/97   ---     24.7     25.0     18.3

  POWDER & TONGUE RIVER BASINS                                         
     BEAR TRAP PILLOW       8200    5/01/97   ---      5.0      4.1      4.2
     BIG GOOSE              7760    4/26/97    35      9.6      6.4      8.3
     BONE SPGS. PILLOW      9350    5/01/97   ---     21.2     23.9     18.4
     BURGESS JCT. PILLOW    7880    5/01/97   ---     16.4     15.3     13.5
     CLOUD PEAK PILLOW      9850    5/01/97   ---     21.3     21.9     17.7
     DOME LAKE PILLOW       8880    5/01/97   ---     15.8     15.6     15.0
     HANSEN S.M. PILLOW     8360    5/01/97   ---      5.9      5.4      6.9
     LOST CREEK PILLOW      8080    5/01/97   ---     20.0     16.5     15.8
     MIDDLE POWDER PILLOW   7760    5/01/97   ---     18.4     16.6     14.8
     NORTH TONGUE           8450    4/26/97    42     13.1     13.6     13.9
     ONION GULCH            8780    4/28/97    46     13.6     12.7      8.9
     POWDER RVR.PASS PILL   9480    5/01/97   ---     15.9     15.7     10.5
     SAWMILL DIVIDE         9260    4/26/97    56     17.3     18.2     15.6
     SOLDIER PARK           8780    4/28/97    26      5.8       --      6.9
     SOUR DOUGH             8460    4/28/97    28      5.0      8.6      6.9
     SUCKER CREEK PILLOW    8880    5/01/97   ---     18.3     15.8     13.8
     WOOD ROCK G.S.         8440    4/26/97    47     14.1     13.2     12.2

  BELLE FOURCHE & CHEYENNE RIVER BASINS                                
     BEARLODGE DIVIDE       4680    4/24/97     0       .0       .0       .8
     BLIND PARK PILLOW      6870    5/01/97   ---      6.8      6.2      9.6
     NORTH RAPID CK PILL.   6130    5/01/97   ---      9.4       --    999.9
     REUTER CANYON          6280    4/25/97    42     17.6       .8      4.5
     WARREN PEAK PILLOW     6520    5/01/97   ---     19.9     11.3      9.6

  UPPER NORTH PLATTE BASIN                                             
     DIVIDE PEAK PILLOW     8860    5/01/97   ---     26.7     22.7     19.3
     JOE WRIGHT SNOTEL     10000    5/01/97   ---     35.0     34.3     24.7
     MOSS LAKE              9800    4/29/97    74     29.86    26.3     26.9
     NORTH BARRETT CREEK    9400    4/29/97    73     27.07    26.3     22.6
     NORTH FRENCH PILLOW   10130    5/01/97   ---     39.5     42.2     29.4
     OLD BATTLE PILLOW      9920    5/01/97   ---     47.9     40.5     38.2
     PURGATORY GULCH        8970    5/01/97    52     18.8     16.0     10.3
     ROACH SNOTEL           9400    5/01/97   ---     26.5     24.0     18.1
     RYAN PARK              8400    4/29/97    25      9.83     9.7      7.9
     SAND LAKE PILLOW      10050    5/01/97   ---     45.2     38.7     37.2
     SOUTH BRUSH PILLOW     8440    5/01/97   ---     10.2     10.8     10.6
     WEBBER SPRING PILLOW   9250    5/01/97   ---     33.9     28.2     26.0
     WILLOW CK PS SNOTEL    9500    5/01/97   ---     24.1     16.6     13.5

  LOWER NORTH PLATTE, SWEETWATER & LARAMIE RIVER BASINS                
     ALBANY                 9400    4/29/97    39     16.2     13.2     12.8
     BROOKLYN LK. PILLOW   10220    5/01/97   ---     41.8     34.6     28.9
     BUCK CREEK             7960    4/30/97    44     17.0     12.0     10.0
     CASPER MTN. PILLOW     7850    5/01/97   ---     24.0     21.2     17.8
     CHRISTINA LK PILLOW    9980    5/01/97   ---     22.8     16.1     18.0
     DEADMAN HILL SNOTEL   10200    5/01/97   ---     23.4     26.5     19.1
     FOXPARK                9060    4/28/97    18      8.0     10.4      5.4
     GRANNIER MEADOWS       8860    4/29/97    60     19.8     15.6     15.1
     HAIRPIN TURN           9480    4/28/97    48     20.0     17.8     16.6
     JOE WRIGHT SNOTEL     10000    5/01/97   ---     35.0     34.3     24.7
     LA BONTE               8450    4/30/97     0       .0       .0      1.8
     LA PRELE PILLOW        8380    5/01/97   ---     11.9     10.7      6.3
     LARSEN CREEK           9020    5/01/97   ---     17.0E    12.5     11.2
     LIBBY LODGE            8750    4/28/97    26     11.4      9.0      9.0
     POLE MOUNTAIN          8700    4/28/97    20      6.3      4.4      4.1
     RENO HILL PILLOW       8500    5/01/97   ---     23.7     20.4     13.4
     ROACH SNOTEL           9400    5/01/97   ---     26.5     24.0     18.1
     SOUTH PASS PILLOW      9040    5/01/97   ---     27.7     20.1     18.1
     WINDY PEAK PILLOW      7900    5/01/97   ---      6.1      6.1      7.9

  LITTLE SNAKE RIVER BASIN                                             
     BATTLE MTN. PILLOW     7440    5/01/97   ---      5.1      4.9      4.8
     BUTTER HILL            7880    4/28/97    32     13.8     14.1     10.3
     DIVIDE PEAK PILLOW     8860    5/01/97   ---     26.7     22.7     19.3
     ELK RIVER SNOTEL       8600    5/01/97   ---     25.2     20.1     16.2
     HASKINS CREEK          8980    4/28/97    94     35.18    35.8     32.6
     OLD BATTLE PILLOW      9920    5/01/97   ---     47.9     40.5     38.2
     SANDSTONE PILLOW       8150    5/01/97   ---     12.5     14.0      9.8
     WHISKEY PARK PILLOW    8950    5/01/97   ---     44.0     37.6     29.6

 UPPER GREEN RIVER BASIN                                              
     BIG PARK               8620    4/29/97    67     25.9     23.8     20.5
     BIG SANDY PILLOW       9080    5/01/97   ---     18.1     16.1     13.9
     BLIND BULL PILLOW      8900    5/01/97   ---     44.0     38.7     22.7
     EAST RIM DIV PILLOW    7930    5/01/97   ---     16.4     16.6     14.8
     ELKHART PARK PILLOW    9400    5/01/97   ---     18.6     14.9     14.0
     GROS VENTRE PILLOW     8750    5/01/97   ---     23.2     19.8     13.9
     INDIAN CREEK PILLOW    9430    5/01/97   ---     43.6     35.7     28.9
     KELLEY R.S. PILLOW     8180    5/01/97   ---     22.8     17.6     15.0
     KENDALL R.S. PILLOW    7740    5/01/97   ---     19.2     16.2     10.6
     LOOMIS PARK PILLOW     8240    5/01/97   ---     22.2     21.7     15.1
     NEW FORK PILLOW        8340    5/01/97   ---     12.0     12.3      9.1
     POCKET CREEK           9350    4/29/97    55     18.3     13.5     13.3
     ROWDY CREEK            8300    4/28/97    79     34.4     28.8     20.6
     SNIDER BASIN PILLOW    8060    5/01/97   ---     21.2     23.2     13.0
     TRIPLE PEAK  PILLOW    8500    5/01/97   ---     35.0     33.8     25.0

  LOWER GREEN RIVER BASIN                                              
     BIG PARK               8620    4/29/97    67     25.9     23.8     20.5
     BLACK'S FORK JUNCTN    8930    4/28/97    17      6.5     10.2      7.4
     HAMS FORK PILLOW       7840    5/01/97   ---     12.9      8.6      5.7
     HENRY'S FORK          10000    4/28/97    31     11.5     18.0     13.6
     HEWINTA SNOTEL         9500    5/01/97   ---      8.6S    12.6      5.3
     HICKERSON PARK SNOTE   9100    5/01/97   ---      9.4S      .0      2.9
     HOLE-IN-ROCK SNOTEL    9150    5/01/97   ---      8.0S     3.6      2.3
     INDIAN CREEK PILLOW    9430    5/01/97   ---     43.6     35.7     28.9
     KELLEY R.S. PILLOW     8180    5/01/97   ---     22.8     17.6     15.0
     SPRING CRK. PILLOW     9000    5/01/97   ---     41.0     39.3     29.6
     STEEL CREEK PARK SNO  10100    5/01/97   ---     20.4S    22.9     18.9

  UPPER BEAR RIVER BASIN                                               
     BIG PARK               8620    4/29/97    67     25.9     23.8     20.5
     BURT'S-MILLER RANCH    7900    4/28/97     0       .0       .0      2.0
     HAYDEN FORK SNOTEL     9100    5/01/97   ---     15.0S    21.6      6.6
     INDIAN CREEK PILLOW    9430    5/01/97   ---     43.6     35.7     28.9
     KELLEY R.S. PILLOW     8180    5/01/97   ---     22.8     17.6     15.0
     SALT RIVER PILLOW      7600    5/01/97   ---     20.2     14.6     10.8
     STILLWATER CAMP        8550    4/28/97    18      7.5     11.5      7.5
     TRIAL LAKE SNOTEL      9960    5/01/97   ---     36.9S    36.3     24.0
     TRIAL LAKE             9960    4/28/97    77     35.0     30.7     25.7

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