SLCESPCO Jun, 2023
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FGUS65 KSTR 072017
ESPCO 

NATIONAL WEATHER SERVICE
COLORADO BASIN RIVER FORECAST CENTER
SALT LAKE CITY, UT

                      WATER SUPPLY INFORMATION FOR

                THE COLORADO RIVER BASIN WITHIN COLORADO

                           June 7, 2023


BASIN CONDITIONS (% OF AVERAGE) AS OF JUNE 1:
   *NOTE: SNOW IS % OF MEDIAN

 SUBBASIN                  MAY   OCT-MAY   JUN 1   MAY
                          PRECIP  PRECIP   SNOW* STRMFLW
----------------------    ------  -------  ----  --------
   UPPER COLORADO            75     100      95    170 
   GUNNISON                  65     115     135    185
   DOLORES/SAN MIGUEL        75     135     205    225
   SAN JUAN                  85     125     135    195
   YAMPA/WHITE               40     115     125    200


RESERVOIR STORAGE (KAF) AS OF MAY 31:
                            C U R R E N T   Y R         L A S T   Y R    1991-2020
                          EOM      % of     % of       EOM      % of     MAY 31        Usable
                          Storage  Average  Capacity   Storage  Average  Avg Storage   Capacity
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   COLORADO - LAKE GRANB|    476.8|    125|     97|      424.5|    111|     382.8|     490.3| 
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   WILLOW CK - WILLOW CK|      9.2|    105|    101|        7.1|     81|        8.8|       9.1| 
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   WILLIAMS FORK - WILLI|     79.3|     99|     82|       88.2|    110|       79.8|      96.9| 
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   MUDDY CK - WOLFORD MO|     61.1|    104|     93|       49.0|     83|       59.0|      66.0| 
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   BLUE - DILLON RESERVO|    231.1|    101|     91|      215.6|     94|      228.9|     254.0| 
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   BLUE - GREEN MTN RESE|    115.5|    121|     79|       79.3|     83|       95.3|     146.9| 
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   HOMESTAKE CK - HOMEST|     17.4|     74|     41|       15.3|     65||       23.5|      43.0| 
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   FRYING PAN - RUEDI RE|     84.4|    109|     83|       74.7|     96||       77.5|     102.0| 
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   PLATEAU CK - VEGA RES|     34.6|    112|    105|       26.2|     85||       30.8|      32.9| 
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   TAYLOR - TAYLOR PARK |     80.5|    103|     76|       74.0|     95||       78.2|     106.2| 
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   GUNNISON - BLUE MESA |    589.0|    101|     71|      334.9|     58||      580.7|     827.9| 
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   GUNNISON - MORROW POI|    112.0|    100|     96|      110.7|     99||      111.6|     117.0| 
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   GUNNISON - CRYSTAL RE|     16.4|     98|     94|       16.5|     98||       16.8|      17.5| 
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   MUDDY CK - PAONIA RES|     16.0|    116|     96|       15.6|    113||       13.8|      16.7| 
------------------------------------------------------------------------------------------------
   UNCOMPAHGRE - RIDGWAY|     59.1|     86|     71|       65.8|     96||       68.6|      83.0| 
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   DOLORES - MCPHEE RESE|    366.2|    110|     96|      257.3|     77||      333.2|     381.1| 
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   LOS PINOS - VALLECITO|     90.7|     87|     72|       92.1|     89||      103.8|     125.4| 
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   SAN JUAN - NAVAJO RES|   1340.3|     96|     79|      953.6|     68||     1401.5|    1696.0| 
------------------------------------------------------------------------------------------------
   FLORIDA - LEMON RESER|     32.2|    106|     81|       26.3|     86||       30.5|      39.8| 
------------------------------------------------------------------------------------------------
   COLORADO - LAKE POWEL|   7887.8|     52|     32|     6346.0|     42||    15119.4|   24322.0| 
------------------------------------------------------------------------------------------------

STREAMFLOW FORECASTS:
Developed:                    Jun 1 2023 

Yampa/White Basins
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Yampa River
  Steamboat Springs        Apr-Jul    330   127    360    345    320    310    260
Elk River
  Milner, nr               Apr-Jul    520   158    555    535    505    485    330
Elkhead Ck
  Long Gulch, abv, Hayden  Apr-Jul    115   162    122    118    112    110     71
Yampa River
  Maybell, nr              Apr-Jul   1400   152   1510   1460   1360   1330    920
Little Snake River
  Slater, nr               Apr-Jul    215   139    230    220    205    195    155
  Lily, nr                 Apr-Jul    560   172    610    585    545    530    325
Yampa River
  Deerlodge Park           Apr-Jul   1960   165   2130   2050   1920   1870   1190
White River
  Meeker, nr               Apr-Jul    385   148    420    400    370    350    260
  Watson, nr               Apr-Jul    420   156    460    435    400    390    270

Upper Colorado, Above Gunnison Basin
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Colorado River
  Lake Granby, Granby, nr  Apr-Jul    240   107    275    255    230    215    225
Willow Ck
  Willow Ck Reservoir, Gr  Apr-Jul     82   164     95     88     78     74     50
Fraser River
  Winter Park              Apr-Jul     20   108     23     21   19.0   17.5   18.6
Williams Fork River
  Williams Fork Reservoir  Apr-Jul     90    94    105     96     85     80     96
Blue River
  Dillon Reservoir         Apr-Jul    135    81    155    145    125    115    167
  Green Mtn Reservoir      Apr-Jul    240    86    270    255    225    210    280
Muddy Ck
  Wolford Mountain Reserv  Apr-Jul     52   100     60     56     49     46     52
Colorado River
  Kremmling, nr            Apr-Jul    940   108   1050    990    890    840    870
Eagle River
  Gypsum, blo              Apr-Jul    300    90    345    320    280    265    335
Colorado River
  Dotsero, nr              Apr-Jul   1480   106   1630   1550   1400   1330   1400
Frying Pan River
  Ruedi Reservoir, Basalt  Apr-Jul    130    96    145    137    122    115    135
Roaring Fork River
  Glenwood Springs         Apr-Jul    830   127    900    865    795    760    655
Colorado River
  Glenwood Springs, blo    Apr-Jul   2380   114   2680   2530   2250   2130   2080
  Cameo, nr                Apr-Jul   2800   123   3100   2950   2680   2550   2270

Gunnison Basin
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Taylor River
  Taylor Park Reservoir    Apr-Jul    118   126    134    124    114    109     94
  Almont                   Apr-Jul    184   125    205    193    177    169    147
East River
  Almont                   Apr-Jul    265   150    285    275    255    245    177
Gunnison River
  Gunnison, nr             Apr-Jul    505   144    550    525    490    475    350
Tomichi Ck
  Gunnison                 Apr-Jul     87   130    103     94     84     80     67
Lake Fork River
  Gateview                 Apr-Jul    127   108    146    135    122    116    118
Gunnison River
  Blue Mesa Reservoir      Apr-Jul    845   133    940    890    825    795    635
  Morrow Point Reservoir   Apr-Jul    910   132   1020    965    890    860    690
  Crystal Reservoir        Apr-Jul   1020   132   1140   1070    990    950    770
Muddy Ck
  Paonia Reservoir, Bardi  Apr-Jul    186   230    200    191    182    176     81
NF Gunnison River
  Somerset, nr             Apr-Jul    485   183    520    500    475    460    265
Surface Ck
  Cedaredge                Apr-Jul     36   247     39     37     35     34   14.6
Uncompahgre River
  Ridgway Reservoir        Apr-Jul    112   122    127    118    107    103     92
  Colona                   Apr-Jul    147   123    167    154    138    129    120
  Delta                    Apr-Jul    167   176    200    182    154    144     95
Gunnison River
  Grand Junction, nr       Apr-Jul   2250   169   2430   2320   2180   2100   1330

Dolores Basin
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Dolores River
  Dolores                  Apr-Jul    395   184    430    410    385    370    215
  Mcphee Reservoir         Apr-Jul    530   208    565    545    515    505    255
San Miguel River
  Placerville, nr          Apr-Jul    160   139    177    168    154    148    115
Dolores River
  Cisco, nr                Apr-Jul   1120   222   1180   1140   1090   1080    505

San Juan Basin
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
San Juan River
  Pagosa Springs           Apr-Jul    290   149    315    300    280    270    194
  Carracas, nr             Apr-Jul    505   153    540    520    490    475    330
Rio Blanco River
  Pagosa Springs, nr, Bla  Apr-Jul     71   145     77     74     68     66     49
Little Navajo River
  Oso Div Dam,bl,chromo,n  Apr-Jul   10.4   170   11.0   10.6   10.1    9.8    6.1
Navajo River
  Chromo, nr, Oso Div Dam  Apr-Jul     89   153     97     92     86     83     58
Piedra River
  Arboles, nr              Apr-Jul    305   169    330    315    300    290    181
Los Pinos River
  Vallecito Reservoir, Ba  Apr-Jul    265   150    290    275    255    245    177
San Juan River
  Navajo Reservoir, Archu  Apr-Jul   1010   160   1110   1050    980    945    630
Florida River
  Lemon Reservoir, Durang  Apr-Jul     73   152     84     77     69     66     48
Animas River
  Durango                  Apr-Jul    570   148    630    590    550    530    385
San Juan River
  Bluff, nr                Apr-Jul   1800   162   1930   1850   1760   1700   1110
Mancos River
  Mancos, nr               Apr-Jul     46   267     49     47     44     43   17.2

Lake Powell
                           Period     50%  %AVG    10%    30%    70%    90%    AVG
                           ------    ----  ----   ----   ----   ----   ----    ---
Colorado River
  Lake Powell, Glen Cyn D  Apr-Jul  10700   167  11620  11080  10230   9820   6390

50% Volume that has a 50 percent chance of being exceeded (in 1000 acre-feet).
%AVG  50% volume in percent of the 1991-2020 average.
10% Volume that has a 10 percent chance of being exceeded.
30% Volume that has a 30 percent chance of being exceeded.
90% Volume that has a 90 percent chance of being exceeded.
70% Volume that has a 70 percent chance of being exceeded.
AVG   average volume for the 1991-2020 period.

All forecast volumes reflect natural flow.  Actual observed flow may
be affected by upstream water management.

CBRFC/Nielson