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

                                    JUNE   1998


      SNOW COURSE         ELEVATION    DATE    SNOW   WATER     LAST   AVERAGE
                                              DEPTH  CONTENT    YEAR   1961-90
----------------------------------------------------------------------------
 
   SNAKE RIVER BASIN                                          
      ASTER CREEK            7750                                ---      ---
      BASE CAMP PILLOW       7030    6/01/98   ---       .0       .0       .0
      BASE CAMP        (d)   7030                                ---      ---
      BLACK BEAR PILLOW      7950    6/01/98   ---     30.4     50.2     27.5
      BLACK BEAR             7950                                ---      ---
      BLIND BULL PILLOW      8900    6/01/98   ---     14.6     37.2     16.4
      BRYAN FLAT             6420                                ---      ---
      CCC CAMP               7000                                ---      ---
      COTTONWOOD CR PILLOW   7700    6/01/98   ---       .0      6.5       .0
      COULTER CREEK          7020                                ---      ---
      DARBY CANYON           8250                               12.0     12.7
      EAST RIM DIV PILLOW    7930    6/01/98   ---       .0       .0      7.0
      ELBO RANCH             7100                                ---      ---
      FOUR MILE MEADOWS      7860                                ---      ---
      GLADE CREEK            7040                                ---      ---
      GRASSY LAKE PILLOW     7270    6/01/98   ---     11.6     17.5     12.0
      GREYS BOUNDARY         5720                                ---      ---
      GROS VENTRE PILLOW     8750    6/01/98   ---       .0      4.1       .0
      GROVER PARK DIVIDE     7000                                ---      ---
      HUCKLEBERRY DIVIDE     7300                                ---      ---
      JACKPINE CREEK         7350                                2.4      ---
      LEWIS LAKE PILLOW      7850    6/01/98   ---     13.5     26.4     19.8
      LEWIS LAKE DIVIDE      7850                                ---      ---
      MORAN                  6750                                ---      ---
      PHILLIPS BENCH PILL.   8200    6/01/98   ---     15.9     24.0     17.6
      POISON MEADOWS         8500                                ---      ---
      SALT RIVER PILLOW      7600    6/01/98   ---       .0       .0       .0
      SALT RV SUMMIT   (d)   7600                                ---      ---
      SNAKE RIVER STATION    6920    6/01/98   ---       .0      ---      ---
      SNOW KING MTN          7660                                ---      ---
      SPRING CRK. PILLOW     9000    6/01/98   ---     14.4     18.3     19.0
      TETON PASS W.S.        7740                                ---      ---
      THUMB DIVIDE           7980                                ---      ---
      TOGWOTEE PASS PILLOW   9580    6/01/98   ---     20.2     25.0     23.6
      TURPIN MEADOWS         6900                                ---      ---
      TWO OCEAN PILLOW       9240    6/01/98   ---     23.9     39.7     22.5
      WILLOW CREEK PILLOW    8450    6/01/98   ---      6.8     19.4     19.2
 
   UPPER YELLOWSTONE & MADISON RIVER BASINS                   
      BLACK BEAR PILLOW      7950    6/01/98   ---     30.4     50.2     27.5
      BLACK BEAR             7950                                ---      ---
      CANYON PILLOW          8090    6/01/98   ---       .0       .1      1.4
      CANYON           (d)   8090                                ---      ---
      FISHER CREEK PILLOW    9100    6/01/98   ---     21.3     44.5     31.7
      FISHER CREEK           9100                                ---      ---
      LAKE CAMP              7780                                ---      ---
      LUPINE CREEK           7380                                ---      ---
      MADISON PLT PILLOW     7750    6/01/98   ---      7.7     14.7      7.5
      MADISON PLATEAU        7750                                ---      ---
      NORRIS BASIN           7500                                ---      ---
      N.E. ENTRANCE PILLOW   7350    6/01/98   ---       .0       .0       .2
      NORTHEAST ENTRANCE     7350                                ---       .4
      OLD FAITHFUL           7400                                ---      ---
      PARKERS PEAK PILLOW    9400    6/01/98   ---      9.4     24.4     18.6
      SYLVAN LAKE PILLOW     8420    6/01/98   ---      3.4     11.5     14.1
      SYLVAN PASS      (d)   7100                                ---      ---
      THUMB DIVIDE           7980                                ---      ---
      TWENTY-ONE MILE        7150                                ---      ---
      TWO OCEAN PILLOW       9240    6/01/98   ---     23.9     39.7     22.5
      WEST YELL'ST PILLOW    6700    6/01/98   ---       .0       .0       .0
      WEST YELLOWSTONE       6700    6/01/98     0       .0       .0       .0
 
   WIND RIVER BASIN                                           
      BLUE RIDGE             9620                                ---      ---
      BURROUGHS CRK PILLOW   8750    6/01/98   ---      1.5      2.6      2.0
      BURROUGHS CREEK        8750                                ---      ---
      CASTLE CREEK           8400                                ---      ---
      CHRISTINA LK PILLOW    9980                               11.2      9.9
      COLD SPRINGS PILLOW    9630    6/01/98   ---       .0       .0       .3
      DU NOIR                8760                                ---      2.2
      GEYSER CREEK           8500                                ---      2.2
      GRANNIER MEADOWS       8860                                ---      ---
      HOBBS PARK PILLOW     10100    6/01/98   ---      9.5     12.6      9.3
      LITTLE WARM PILLOW     9370    6/01/98   ---       .0       .0       .7
      MIDDLE FORK            7420                                ---      ---
      SOUTH PASS PILLOW      9040    6/01/98   ---       .4      8.2     10.0
      SOUTH PASS       (d)   9040                                ---      ---
      ST LAWRENCE ALT PILL   8620    6/01/98   ---       .0       .0       .1
      T CROSS RANCH          7900                                ---      ---
      TOGWOTEE PASS PILLOW   9580    6/01/98   ---     20.2     25.0     23.6
      TOWNSEND CRK PILLOW    8700    6/01/98   ---       .0       .0      1.8
      TOWNSEND CREEK   (d)   8700                                ---      ---
      YOUNTS PEAK PILLOW     8350    6/01/98   ---      3.4      8.9      9.1
 
   BIG HORN RIVER BASIN                                       
      BALD MOUNTAIN PILLOW   9380    6/01/98   ---     11.9     16.4     18.5
      BALD MOUNTAIN    (d)   9380                                ---      ---
      BONE SPGS. PILLOW      9350    6/01/98   ---      3.9      9.6      8.1
      BONE SPRINGS DIVIDE    9350                                ---      ---
      GENEVA PASS       AM   9400                                ---      ---
      IRISH ROCK PILLOW      9600                                ---      4.5
      KIRWIN PILLOW          9550    6/01/98   ---       .7       .3      5.1
      LOST CREEK PILLOW      8080                                5.9      5.8
      MEDICINE LODGE LAKES   9340                                ---      ---
      MIDDLE POWDER PILLOW   7760    6/01/98   ---       .0       .0      2.5
      MIDDLE POWDER          7760                                ---      ---
      NOWOOD CREEK PILLOW    8600                                ---      5.5
      ONION GULCH            8780                                ---      ---
      OWL CREEK PILLOW       8980    6/01/98   ---       .0       .0       .1
      OWL CREEK              8980                                ---      ---
      POWDER RVR.PASS PILL   9480    6/01/98   ---       .0      4.2      1.3
      RANGER CREEK           8120                                ---      ---
      SHELL CREEK PILLOW     9580    6/01/98   ---      1.0     11.2     11.2
      SHELL CREEK            9580                                ---      ---
      TIMBER CREEK PILLOW    7950    6/01/98   ---       .0       .0       .2
      TIMBER CREEK           7950                                ---      ---
      TYRELL RANGER STA.     8300                                ---      ---
 
   SHOSHONE & CLARKS FORK RIVER BASINS                        
      BEARTOOTH LK. PILLOW   9280    6/01/98   ---     11.3     31.2     19.4
      BLACKWATER PILLOW      9780    6/01/98   ---     16.4     31.5     18.8
      CARTER MOUNTAIN        7950                                ---      ---
      FISHER CREEK PILLOW    9100    6/01/98   ---     21.3     44.5     31.7
      FISHER CREEK           9100                                ---      ---
      EVENING STAR PILLOW    9200    6/01/98   ---     14.0     31.1     25.5
      MARQUETTE PILLOW       8760    6/01/98   ---      2.0       .0      4.1
      MARQUETTE CREEK        8760                                ---      ---
      PARKERS PEAK PILLOW    9400    6/01/98   ---      9.4     24.4     18.6
      N.E. ENTRANCE PILLOW   7350    6/01/98   ---       .0       .0       .2
      NORTHEAST ENTRANCE     7350                                ---       .4
      PARKERS PEAK PILLOW    9400    6/01/98   ---      9.4     24.4     18.6
      SYLVAN PASS      (d)   7100                                ---      ---
      SYLVAN ROAD PILLOW     7120    6/01/98   ---       .0       .0      1.0
      WHITE MILL PILLOW      8700    6/01/98   ---     14.7     28.9     19.4
      WHITE MILL             8700                                ---      ---
      WOLVERINE PILLOW       7650    6/01/98   ---       .0       .0       .0
      WOLVERINE        (d)   7650                                ---      ---
      YOUNTS PEAK PILLOW     8350    6/01/98   ---      3.4      8.9      9.1
 
   POWDER & TONGUE RIVER BASINS                               
      BEAR TRAP PILLOW       8200    6/01/98   ---       .0       .0       .0
      BEAR TRAP MDWS AM(d)   8200                                ---      ---
      BIG GOOSE              7760                                ---      ---
      BONE SPGS. PILLOW      9350    6/01/98   ---      3.9      9.6      8.1
      BONE SPRINGS DIVIDE    9350                                ---      ---
      BURGESS JCT. PILLOW    7880    6/01/98   ---       .0      1.9      2.3
      BURGESS R.S.     (d)   7880                                ---      ---
      CLOUD PEAK PILLOW      9850    6/01/98   ---       .7     12.0      8.3
      CLOUD  PEAK       AM   9850                                ---      ---
      DOME LAKE PILLOW       8880    6/01/98   ---       .0       .4      3.9
      DOME LAKE              8880                                ---      ---
      GENEVA PASS       AM   9400                                ---      ---
      HANSEN S.M. PILLOW     8360    6/01/98   ---       .0       .0       .8
      LOST CREEK PILLOW      8080                                5.9      5.8
      MIDDLE POWDER PILLOW   7760    6/01/98   ---       .0       .0      2.5
      MIDDLE POWDER          7760                                ---      ---
      NORTH TONGUE           8450                                ---      ---
      ONION GULCH            8780                                ---      ---
      POWDER RVR.PASS PILL   9480    6/01/98   ---       .0      4.2      1.3
      POWDER RV PASS   (d)   9480                                ---      ---
      SAWMILL DIVIDE         9260                                ---      ---
      SOLDIER PARK           8780                                ---      ---
      SOUR DOUGH             8460                                ---      ---
      SUCKER CREEK PILLOW    8880    6/01/98   ---       .0      7.0      4.0
      SUCKER CREEK           8880                                ---      ---
      WOOD ROCK G.S.         8440                                ---      ---
 
   BELLE FOURCHE & CHEYENNE RIVER BASINS                      
      BEARLODGE DIVIDE       4680                                ---      2.2
      BLIND PARK PILLOW      6870    6/01/98   ---       .0       .0       .0
      DITCH CREEK            6870                                ---      0.0
      NORTH RAPID CK PILL.   6130    6/01/98   ---       .0       .0      0.0
      MALLO PILLOW           6420                                ---      0.0
      MALLO                  6420                                ---      ---
      MOUNT TOM              5560                                ---      ---
      MOUNT TOM PILLOW       5560                                ---      0.0
      REUTER CANYON          6280                                ---      2.2
      UPPER SPEARFISH        6500                                ---      0.0
      WARREN PEAK PILLOW     6520    6/01/98   ---       .0       .0       .1
      WARREN PEAK            6520                                ---      ---
      LITTLE BEAR RUN        6240                                ---      0.0
 
   UPPER NORTH PLATTE BASIN                                   
      DIVIDE PEAK PILLOW     8860    6/01/98   ---       .0      1.0      2.9
      JOE WRIGHT SNOTEL     10000    6/01/98   ---     10.6     20.6     17.1
      MOSS LAKE              9800                                ---      ---
      NORTH BARRETT CREEK    9400                                ---      ---
      NORTH FRENCH PILLOW   10130    6/01/98   ---     20.0     26.6     20.2
      OLD BATTLE PILLOW      9920    6/01/98   ---     24.5     36.6     24.0
      PURGATORY GULCH        8970                                ---      ---
      ROACH SNOTEL           9400    6/01/98   ---       .2      8.1      7.5
      RYAN PARK              8400                                ---      ---
      SAND LAKE PILLOW      10050    6/01/98   ---     17.7     33.0     24.6
      SOUTH BRUSH PILLOW     8440    6/01/98   ---       .0       .0      1.0
      WEBBER SPRING PILLOW   9250    6/01/98   ---       .0     12.2     10.3
      WILLOW CK PS SNOTEL    9500    6/01/98   ---       .0      7.0      2.2
 
   LOWER NORTH PLATTE, SWEETWATER & LARAMIE RIVER BASINS      
      ALBANY                 9400                                ---      ---
      BOXELDER               7280                                ---      ---
      BROOKLYN LK. PILLOW   10220    6/01/98   ---      4.1     18.2     12.8
      BUCK CREEK             7960                                ---      ---
      CASPER MTN. PILLOW     7850    6/01/98   ---       .0     23.0      3.5
      CHRISTINA LK PILLOW    9980                               11.2      9.9
      DEADMAN HILL SNOTEL   10200    6/01/98   ---      4.7     13.5     10.2
      DEADMAN HILL          10200                                ---      ---
      FOXPARK                9060                                ---      ---
      GRANNIER MEADOWS       8860                                ---      ---
      HAIRPIN TURN           9480                                ---      ---
      JOE WRIGHT SNOTEL     10000    6/01/98   ---     10.6     20.6     17.1
      LA BONTE               8450                                ---      ---
      LA PRELE PILLOW        8380    6/01/98   ---       .0       .1      1.0
      LARSEN CREEK           9020                                ---      ---
      LIBBY LODGE            8750                                ---      ---
      POLE MOUNTAIN          8700                                ---      ---
      RENO HILL PILLOW       8500    6/01/98   ---       .0      4.0      2.9
      ROACH SNOTEL           9400    6/01/98   ---       .2      8.1      7.5
      SOUTH PASS PILLOW      9040    6/01/98   ---       .4      8.2     10.0
      SOUTH PASS       (d)   9040                                ---      ---
      WINDY PEAK PILLOW      7900    6/01/98   ---       .0       .0       .0
 
   LITTLE SNAKE RIVER BASIN                                   
      BATTLE MTN. PILLOW     7440    6/01/98   ---       .0       .0       .0
      BUTTER HILL            7880                                ---      ---
      DIVIDE PEAK PILLOW     8860    6/01/98   ---       .0      1.0      2.9
      ELK RIVER SNOTEL       8600    6/01/98   ---       .0       .0       .2
      HASKINS CREEK          8980                                ---      3.2
      OLD BATTLE PILLOW      9920    6/01/98   ---     24.5     36.6     24.0
      SANDSTONE PILLOW       8150    6/01/98   ---       .0       .0       .0
      WHISKEY PARK PILLOW    8950    6/01/98   ---     17.5     26.0     12.0
 
   UPPER GREEN RIVER BASIN                                    
      BIG PARK               8620                                ---      ---
      BIG SANDY PILLOW       9080    6/01/98   ---       .0       .0       .0
      BLIND BULL PILLOW      8900    6/01/98   ---     14.6     37.2     16.4
      EAST RIM DIV PILLOW    7930    6/01/98   ---       .0       .0      7.0
      ELKHART PARK PILLOW    9400    6/01/98   ---       .0       .0      4.4
      GROS VENTRE PILLOW     8750    6/01/98   ---       .0      4.1       .0
      INDIAN CREEK PILLOW    9430    6/01/98   ---     15.1     21.5     17.4
      KELLEY R.S. PILLOW     8180    6/01/98   ---       .0       .0       .0
      KENDALL R.S. PILLOW    7740    6/01/98   ---       .0       .0       .0
      LOOMIS PARK PILLOW     8240    6/01/98   ---       .0       .0       .0
      NEW FORK PILLOW        8340    6/01/98   ---       .0       .0       .0
      POCKET CREEK           9350                                ---      ---
      POISON MEADOWS         8500                                ---      ---
      ROWDY CREEK            8300                                ---      ---
      SNIDER BASIN PILLOW    8060    6/01/98   ---       .0       .0       .0
      TRIPLE PEAK  PILLOW    8500                                9.4     14.7
      TRIPLE PEAK            8500    6/01/98   ---       .0      ---      ---
 
   LOWER GREEN RIVER BASIN                                    
      BIG PARK               8620                                ---      ---
      BLACK'S FORK JUNCTN    8930                                ---      ---
      HAMS FORK PILLOW       7840    6/01/98   ---       .0       .0       .0
      HENRY'S FORK          10000                                ---      ---
      HEWINTA SNOTEL         9500    6/01/98   ---       .0       .0       .0
      HICKERSON PARK SNOTE   9100    6/01/98   ---       .0       .0       .0
      HOLE-IN-ROCK SNOTEL    9150    6/01/98   ---       .0       .0       .1
      INDIAN CREEK PILLOW    9430    6/01/98   ---     15.1     21.5     17.4
      KELLEY R.S. PILLOW     8180    6/01/98   ---       .0       .0       .0
      SPRING CRK. PILLOW     9000    6/01/98   ---     14.4     18.3     19.0
      STEEL CREEK PARK SNO  10100    6/01/98   ---     14.6      9.2     12.0
 
   UPPER BEAR RIVER BASIN                                     
      BIG PARK               8620                                ---      ---
      BURT'S-MILLER RANCH    7900                                ---      ---
      HAYDEN FORK SNOTEL     9100    6/01/98   ---       .0       .0       .0
      HAYDEN FORK            9100                                ---      ---
      INDIAN CREEK PILLOW    9430    6/01/98   ---     15.1     21.5     17.4
      KELLEY R.S. PILLOW     8180    6/01/98   ---       .0       .0       .0
      MONTE CRISTO R.S.      8960                                ---      ---
      SALT RIVER PILLOW      7600    6/01/98   ---       .0       .0       .0
      SALT RV SUMMIT   (d)   7600                                ---      ---
      STILLWATER CAMP        8550                                ---      ---
      TRIAL LAKE SNOTEL      9960    6/01/98   ---     10.4     15.4     12.0
      TRIAL LAKE             9960                                ---      ---
 (d) Denotes discontinued site.

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