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

                                  FEBRUARY 1998


     SNOW COURSE         ELEVATION    DATE    SNOW   WATER     LAST   AVERAGE
                                              DEPTH  CONTENT    YEAR   1961-90
------------------------------------------------------------------------------
 
   SNAKE RIVER BASIN                                          
      ASTER CREEK            7750    1/28/98    76     20.2     38.4     20.0
      BASE CAMP PILLOW       7030    2/01/98   ---     13.4     23.8     12.5
      BASE CAMP        (d)   7030    1/29/98    51     14.3     24.4     13.9
      BLACK BEAR PILLOW      7950    2/01/98   ---     26.5     48.9     24.5
      BLACK BEAR             7950                                ---      ---
      BLIND BULL PILLOW      8900    2/01/98   ---     17.4     33.4     19.0
      BRYAN FLAT             6420    1/26/98    34      7.2     13.3      6.3
      CCC CAMP               7000    1/29/98    38      9.9     14.6      8.3
      COTTONWOOD CR PILLOW   7700    2/01/98   ---     14.7     23.3     14.0
      COULTER CREEK          7020                                ---     14.6
      DARBY CANYON           8250    1/28/98    59     15.8     27.4     15.4
      EAST RIM DIV PILLOW    7930    2/01/98   ---      7.3     13.8      9.3
      ELBO RANCH             7100    1/29/98    37      9.0     14.8      8.1
      FOUR MILE MEADOWS      7860    1/29/98    37      8.4     13.3      8.9
      GLADE CREEK            7040    1/28/98    59     16.1     27.2     15.6
      GRASSY LAKE PILLOW     7270    2/01/98   ---     23.9     37.2     23.0
      GREYS BOUNDARY         5720    1/29/98    43     10.2     15.8      7.9
      GROS VENTRE PILLOW     8750    2/01/98   ---      7.4     17.9     10.6
      GROVER PARK DIVIDE     7000    1/29/98    33      8.0     10.8      7.9
      HUCKLEBERRY DIVIDE     7300    1/28/98    53     13.8     23.0     14.4
      JACKPINE CREEK         7350    1/28/98    54     15.2     24.3     14.6
      LEWIS LAKE PILLOW      7850    2/01/98   ---     21.0     44.9     22.8
      LEWIS LAKE DIVIDE      7850                                ---     27.3
      MORAN                  6750    1/29/98    43     11.7     15.8      9.3
      PHILLIPS BENCH PILL.   8200    2/01/98   ---     19.0     32.8     19.4
      POISON MEADOWS         8500                                ---     19.6
      SALT RIVER PILLOW      7600    2/01/98   ---     10.3     18.3      9.0
      SALT RV SUMMIT   (d)   7600                                ---     10.5
      SNAKE RIVER STATION    6920    1/28/98    53     14.1     22.0     14.0
      SNOW KING MTN          7660    1/26/98    43     10.4     17.6     10.1
      SPRING CRK. PILLOW     9000    2/01/98   ---     15.5     30.0     18.2
      TETON PASS W.S.        7740    1/26/98    76     20.5     38.4     17.3
      THUMB DIVIDE           7980    1/28/98    43     10.8     24.6     13.5
      TOGWOTEE PASS PILLOW   9580    2/01/98   ---     17.3     27.4     16.9
      TURPIN MEADOWS         6900    1/29/98    36      8.6     13.3      7.6
      TWO OCEAN PILLOW       9240    2/01/98   ---     20.1     35.7     18.3
      WILLOW CREEK PILLOW    8450    2/01/98   ---     18.6     33.3     21.0
 
   UPPER YELLOWSTONE & MADISON RIVER BASINS                   
      BLACK BEAR PILLOW      7950    2/01/98   ---     26.5     48.9     24.5
      BLACK BEAR             7950                                ---      ---
      CANYON PILLOW          8090    2/01/98   ---      9.5     19.0      8.3
      CANYON           (d)   8090                                ---     10.3
      FISHER CREEK PILLOW    9100    2/01/98   ---     23.1     43.8     24.2
      FISHER CREEK           9100                                ---      ---
      LAKE CAMP              7780    1/30/98    27      6.1     14.4      6.1
      LUPINE CREEK           7380    1/26/98    25      5.6     11.4      6.9
      MADISON PLT PILLOW     7750    2/01/98   ---     13.9     31.9     16.1
      MADISON PLATEAU        7750                                ---      ---
      NORRIS BASIN           7500    2/01/98    27      5.2     11.9      8.0
      N.E. ENTRANCE PILLOW   7350    2/01/98   ---      5.4      9.3      6.4
      NORTHEAST ENTRANCE     7350    1/31/98    26      6.0     11.8      6.5
      OLD FAITHFUL           7400    1/30/98    36      9.0     19.4     10.8
      PARKERS PEAK PILLOW    9400    2/01/98   ---     13.7     24.5     14.3
      SYLVAN LAKE PILLOW     8420    2/01/98   ---     11.9     24.8     14.9
      SYLVAN PASS      (d)   7100                                ---      9.2
      THUMB DIVIDE           7980    1/28/98    43     10.8     24.6     13.5
      TWENTY-ONE MILE        7150    1/29/98    38      9.4     20.6     11.7
      TWO OCEAN PILLOW       9240    2/01/98   ---     20.1     35.7     18.3
      WEST YELL'ST PILLOW    6700    1/29/98   ---      4.4     10.1      6.1
      WEST YELLOWSTONE       6700    1/29/98    27      6.4     12.5      7.8
 
   WIND RIVER BASIN                                           
      BLUE RIDGE             9620    1/28/98    32      9.3     13.4      7.9
      BURROUGHS CRK PILLOW   8750    2/01/98   ---     11.5     20.0     10.4
      BURROUGHS CREEK        8750                                ---      9.7
      CASTLE CREEK           8400    1/28/98    24      5.4      5.7      3.0
      CHRISTINA LK PILLOW    9980                               17.4     10.2
      COLD SPRINGS PILLOW    9630    2/01/98   ---      6.7      8.0      5.8
      DINWOODY         (d)  10160                                ---      7.5
      DU NOIR                8760    1/29/98    35      8.8     11.2      5.7
      GEYSER CREEK           8500    1/29/98    23      5.0      8.5      4.8
      GRANNIER MEADOWS       8860    1/28/98    30      8.0     14.5      9.4
      HOBBS PARK PILLOW     10100    2/01/98   ---      9.4     13.7     10.0
      LITTLE WARM PILLOW     9370    2/01/98   ---      7.3     13.9      7.2
      MIDDLE FORK            7420    1/28/98    21      5.1      3.2      3.8
      SOUTH PASS PILLOW      9040    2/01/98   ---      9.6     22.5     11.3
      SOUTH PASS       (d)   9040                                ---     10.9
      ST LAWRENCE ALT PILL   8620    2/01/98   ---      6.6      6.0      4.8
      T CROSS RANCH          7900    1/29/98    27      6.7     10.8      5.3
      TOGWOTEE PASS PILLOW   9580    2/01/98   ---     17.3     27.4     16.9
      TOWNSEND CRK PILLOW    8700    2/01/98   ---      6.9      8.0      6.2
      TOWNSEND CREEK   (d)   8700                                ---      5.2
      YOUNTS PEAK PILLOW     8350    2/01/98   ---     11.6     18.5     12.2
 
   BIG HORN RIVER BASIN                                       
      BALD MOUNTAIN PILLOW   9380    2/01/98   ---     13.4     15.3     13.8
      BALD MOUNTAIN    (d)   9380                                ---     14.5
      BONE SPGS. PILLOW      9350    2/01/98   ---     10.4     13.1     10.6
      BONE SPRINGS DIVIDE    9350                                ---     11.9
      GENEVA PASS       AM   9400                                ---     10.5
      IRISH ROCK PILLOW      9600                                ---      7.9
      KIRWIN PILLOW          9550    2/01/98   ---      9.2     12.4      6.6
      LOST CREEK PILLOW      8080                               10.6      8.1
      MEDICINE LODGE LAKES   9340    1/31/98    29      6.3      9.2      7.7
      MIDDLE POWDER PILLOW   7760    2/01/98   ---      5.8     11.2      7.8
      MIDDLE POWDER          7760                                ---      6.6
      NOWOOD CREEK PILLOW    8600                                ---      8.0
      ONION GULCH            8780    1/28/98    22      3.2      6.1      5.8
      OWL CREEK PILLOW       8980    2/01/98   ---      4.1      5.4      2.8
      OWL CREEK              8980                                ---      3.2
      POWDER RVR.PASS PILL   9480    2/01/98   ---      6.6      9.2      7.0
      RANGER CREEK           8120    1/31/98    23      4.4      7.3      6.4
      SHELL CREEK PILLOW     9580    2/01/98   ---      9.3     12.5     10.2
      SHELL CREEK            9580                                ---      9.6
      TIMBER CREEK PILLOW    7950    2/01/98   ---      5.6      4.3      3.6
      TIMBER CREEK           7950                                ---      2.0
      TYRELL RANGER STA.     8300    1/28/98    23      4.0      4.4      5.5
 
   SHOSHONE & CLARKS FORK RIVER BASINS                        
      BEARTOOTH LK. PILLOW   9280    2/01/98   ---     15.3     27.9     16.0
      BLACKWATER PILLOW      9780    2/01/98   ---     15.8     29.9     14.0
      CARTER MOUNTAIN        7950    1/29/98    19      4.2      4.2      3.1
      FISHER CREEK PILLOW    9100    2/01/98   ---     23.1     43.8     24.2
      FISHER CREEK           9100                                ---      ---
      EVENING STAR PILLOW    9200    2/01/98   ---     17.7     32.3     17.8
      MARQUETTE PILLOW       8760    2/01/98   ---      8.7      7.5      5.1
      MARQUETTE CREEK        8760                                ---      4.9
      PARKERS PEAK PILLOW    9400    2/01/98   ---     13.7     24.5     14.3
      N.E. ENTRANCE PILLOW   7350    2/01/98   ---      5.4      9.3      6.4
      NORTHEAST ENTRANCE     7350    1/31/98    26      6.0     11.8      6.5
      PARKERS PEAK PILLOW    9400    2/01/98   ---     13.7     24.5     14.3
      SYLVAN PASS      (d)   7100                                ---      9.2
      SYLVAN ROAD PILLOW     7120    2/01/98   ---      7.8     16.5      8.5
      WHITE MILL PILLOW      8700    2/01/98   ---     17.5     30.1     16.8
      WHITE MILL             8700                                ---      ---
      WOLVERINE PILLOW       7650    2/01/98   ---      8.0     12.0      7.9
      WOLVERINE        (d)   7650                                ---      8.4
      YOUNTS PEAK PILLOW     8350    2/01/98   ---     11.6     18.5     12.2
 
   POWDER & TONGUE RIVER BASINS                               
      BEAR TRAP PILLOW       8200    2/01/98   ---      3.6      5.7      4.8
      BEAR TRAP MDWS AM(d)   8200                                ---      6.3
      BIG GOOSE              7760    1/31/98    22      4.4      5.3      4.3
      BONE SPGS. PILLOW      9350    2/01/98   ---     10.4     13.1     10.6
      BONE SPRINGS DIVIDE    9350                                ---     11.9
      BURGESS JCT. PILLOW    7880    2/01/98   ---      6.6      9.0      7.6
      BURGESS R.S.     (d)   7880                                ---      5.0
      CLOUD PEAK PILLOW      9850    2/01/98   ---      8.3     13.1      8.0
      CLOUD  PEAK       AM   9850                                ---      6.8
      DOME LAKE PILLOW       8880    2/01/98   ---      6.8      9.0      9.0
      DOME LAKE              8880                                ---      5.9
      GENEVA PASS       AM   9400                                ---     10.5
      HANSEN S.M. PILLOW     8360    2/01/98   ---      4.5      5.0      4.6
      LOST CREEK PILLOW      8080                               10.6      8.1
      MIDDLE POWDER PILLOW   7760    2/01/98   ---      5.8     11.2      7.8
      MIDDLE POWDER          7760                                ---      6.6
      NORTH TONGUE           8450    1/31/98    37      8.9     10.7      8.3
      ONION GULCH            8780    1/28/98    22      3.2      6.1      5.8
      POWDER RVR.PASS PILL   9480    2/01/98   ---      6.6      9.2      7.0
      POWDER RV PASS   (d)   9480                                ---      7.4
      SAWMILL DIVIDE         9260    1/31/98    40      8.9     11.4      9.0
      SOLDIER PARK           8780    1/28/98    20      3.0      3.4      3.7
      SOUR DOUGH             8460    1/28/98    22      3.4      4.7      4.3
      SUCKER CREEK PILLOW    8880    2/01/98   ---      7.8     10.1      7.5
      SUCKER CREEK           8880                                ---      7.6
      WOOD ROCK G.S.         8440    1/31/98    30      5.8      8.9      6.6
 
   BELLE FOURCHE & CHEYENNE RIVER BASINS                      
      BEARLODGE DIVIDE       4680    1/30/98     7      1.5      3.2      1.9
      BLIND PARK PILLOW      6870    2/01/98   ---      5.4      7.8      7.2
      DITCH CREEK            6870                                3.6    999.9
      NORTH RAPID CK PILL.   6130    2/01/98   ---      5.4      8.5    999.9
      MALLO PILLOW           6420                                ---      5.2
      MALLO                  6420    1/29/98    25      5.4      9.2      5.2
      MOUNT TOM              5560    1/28/98    18      3.1      7.0      3.0
      MOUNT TOM PILLOW       5560                                ---      2.7
      REUTER CANYON          6280    1/28/98    25      5.7     12.8      6.5
      UPPER SPEARFISH        6500                                9.8      4.5
      WARREN PEAK PILLOW     6520    2/01/98   ---      6.0     13.6      7.2
      WARREN PEAK            6520                                ---      5.8
      LITTLE BEAR RUN        6240    1/27/98    15      2.7      4.2    999.9
 
   UPPER NORTH PLATTE BASIN                                   
      DIVIDE PEAK PILLOW     8860    2/01/98   ---     11.2     18.8     13.3
      JOE WRIGHT SNOTEL     10000    2/01/98   ---     12.6     18.6     14.0
      MOSS LAKE              9800    1/29/98    53     14.5     21.3     16.0
      NORTH BARRETT CREEK    9400    1/29/98    45     10.9     21.2     13.5
      NORTH FRENCH PILLOW   10130    2/01/98   ---     17.6     26.0     16.0
      OLD BATTLE PILLOW      9920    2/01/98   ---     18.6     33.4     20.5
      PURGATORY GULCH        8970    1/27/98    29      8.2     16.4      6.8
      ROACH SNOTEL           9400    2/01/98   ---      9.6     16.8     11.0
      RYAN PARK              8400    1/29/98    22      4.3     11.9      7.4
      SAND LAKE PILLOW      10050    2/01/98   ---     16.5     28.0     21.2
      SOUTH BRUSH PILLOW     8440    2/01/98   ---      5.1     12.4      7.1
      WEBBER SPRING PILLOW   9250    2/01/98   ---     13.3     25.1     17.4
      WILLOW CK PS SNOTEL    9500    2/01/98   ---      4.2     14.5      7.3
 
   LOWER NORTH PLATTE, SWEETWATER & LARAMIE RIVER BASINS      
      ALBANY                 9400    1/28/98    39      9.3     13.0      9.9
      BOXELDER               7280    1/30/98    17      4.4      5.2      4.3
      BROOKLYN LK. PILLOW   10220    2/01/98   ---     12.0     26.3     16.0
      BUCK CREEK             7960    1/30/98    25      7.0     11.4      5.9
      CASPER MTN. PILLOW     7850    2/01/98   ---      8.8     14.4      9.4
      CHRISTINA LK PILLOW    9980                               17.4     10.2
      DEADMAN HILL SNOTEL   10200    2/01/98   ---      9.8     12.3     11.1
      DEADMAN HILL          10200                                ---      ---
      FOXPARK                9060    1/28/98    26      6.2      8.1      4.8
      GRANNIER MEADOWS       8860    1/28/98    30      8.0     14.5      9.4
      HAIRPIN TURN           9480    1/28/98    39      9.8     17.8     11.2
      JOE WRIGHT SNOTEL     10000    2/01/98   ---     12.6     18.6     14.0
      LA BONTE               8450    1/25/98    14      2.1      4.2      3.9
      LA PRELE PILLOW        8380    2/01/98   ---      5.6     11.5      6.6
      LARSEN CREEK           9020    1/27/98    24      5.1     16.2      8.5
      LIBBY LODGE            8750    1/28/98    31      7.3     12.4      7.8
      POLE MOUNTAIN          8700    1/28/98    26      6.1      7.7      5.3
      RENO HILL PILLOW       8500    2/01/98   ---      8.2     15.9      8.3
      ROACH SNOTEL           9400    2/01/98   ---      9.6     16.8     11.0
      SOUTH PASS PILLOW      9040    2/01/98   ---      9.6     22.5     11.3
      SOUTH PASS       (d)   9040                                ---     10.9
      WINDY PEAK PILLOW      7900    2/01/98   ---      4.1      7.7      4.5
 
   LITTLE SNAKE RIVER BASIN                                   
      BATTLE MTN. PILLOW     7440    2/01/98   ---      5.9     13.6      7.3
      BUTTER HILL            7880    1/28/98    33      6.9     14.2      9.7
      DIVIDE PEAK PILLOW     8860    2/01/98   ---     11.2     18.8     13.3
      ELK RIVER SNOTEL       8600    2/01/98   ---      9.8     21.9     12.5
      HASKINS CREEK          8980    1/28/98    77     19.3     33.0     20.4
      OLD BATTLE PILLOW      9920    2/01/98   ---     18.6     33.4     20.5
      SANDSTONE PILLOW       8150    2/01/98   ---      8.8     16.2      9.3
      WHISKEY PARK PILLOW    8950    2/01/98   ---     17.7     29.6     18.4
 
   UPPER GREEN RIVER BASIN                                    
      BIG PARK               8620    1/28/98    49     12.6     21.7     12.6
      BIG SANDY PILLOW       9080    2/01/98   ---      7.1     15.9      9.6
      BLIND BULL PILLOW      8900    2/01/98   ---     17.4     33.4     19.0
      EAST RIM DIV PILLOW    7930    2/01/98   ---      7.3     13.8      9.3
      ELKHART PARK PILLOW    9400    2/01/98   ---      8.1     15.5      8.9
      GROS VENTRE PILLOW     8750    2/01/98   ---      7.4     17.9     10.6
      INDIAN CREEK PILLOW    9430    2/01/98   ---     16.0     33.2     17.9
      KELLEY R.S. PILLOW     8180    2/01/98   ---     10.5     20.9     10.7
      KENDALL R.S. PILLOW    7740    2/01/98   ---     10.2     19.7      9.9
      LOOMIS PARK PILLOW     8240    2/01/98   ---      9.7     23.2     11.6
      NEW FORK PILLOW        8340    2/01/98   ---      6.9     12.8      7.9
      POCKET CREEK           9350    1/27/98    23      5.5     15.7      8.3
      POISON MEADOWS         8500                                ---     19.6
      ROWDY CREEK            8300    1/26/98    55     14.7     28.8     15.1
      SNIDER BASIN PILLOW    8060    2/01/98   ---      8.4     19.4      9.9
      TRIPLE PEAK  PILLOW    8500    2/01/98   ---     15.8     28.2     17.4
      TRIPLE PEAK            8500                                ---     18.1
 
   LOWER GREEN RIVER BASIN                                    
      BIG PARK               8620    1/28/98    49     12.6     21.7     12.6
      BLACK'S FORK JUNCTN    8930                                ---      ---
      HAMS FORK PILLOW       7840    2/01/98   ---      7.8     15.1      8.1
      HENRY'S FORK          10000                                ---      ---
      HEWINTA SNOTEL         9500    2/01/98   ---      7.9S    10.0      6.2
      HICKERSON PARK SNOTE   9100    2/01/98   ---      6.3S     5.2      3.5
      HOLE-IN-ROCK SNOTEL    9150    2/01/98   ---      4.6S     6.0      3.2
      INDIAN CREEK PILLOW    9430    2/01/98   ---     16.0     33.2     17.9
      KELLEY R.S. PILLOW     8180    2/01/98   ---     10.5     20.9     10.7
      SPRING CRK. PILLOW     9000    2/01/98   ---     15.5     30.0     18.2
      STEEL CREEK PARK SNO  10100    2/01/98   ---      9.6S    12.3      9.8
 
   UPPER BEAR RIVER BASIN                                     
      BIG PARK               8620    1/28/98    49     12.6     21.7     12.6
      BURT'S-MILLER RANCH    7900                                ---      ---
      HAYDEN FORK SNOTEL     9100    2/01/98   ---      8.7S    16.6     10.2
      HAYDEN FORK            9100                                ---      ---
      INDIAN CREEK PILLOW    9430    2/01/98   ---     16.0     33.2     17.9
      KELLEY R.S. PILLOW     8180    2/01/98   ---     10.5     20.9     10.7
      MONTE CRISTO R.S.      8960                                ---      ---
      SALT RIVER PILLOW      7600    2/01/98   ---     10.3     18.3      9.0
      SALT RV SUMMIT   (d)   7600                                ---     10.5
      STILLWATER CAMP        8550                                ---      ---
      TRIAL LAKE SNOTEL      9960    2/01/98   ---     12.7S    30.7     15.8
      TRIAL LAKE             9960                                ---     15.4
 (d) Denotes discontinued site.

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