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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 APR 02


    POOL ELEVATIONS  STORAGE     RELEASES       EVAP  INFLOW   RAINFALL
DAY      FT-NGVD     2400HR         DSF        INCHES   ADJ     INCHES
      0800    2400    AC-FT   POWER    TOTAL  8A TO 8A  DSF    7A TO  7A
                                                               DAM   BSN
PRIOR MONTH  761.59     7192
 1   761.58  761.56     7166      0        2   0.250       0   0.00  0.00
 2   761.55  761.54     7149      0        1   0.380       0   0.00  0.00
 3   761.53  761.50     7114      0        0   0.190       0   0.00  0.00
 4   761.50  761.49     7105      0        0   0.230       0   0.00  0.00
 5   761.49  761.48     7096      0        0   0.220       0   0.00  0.00

 6   761.47  761.47     7087      0        0   0.210       0   0.00  0.00
 7   761.49  761.95     7508      0        6   0.080     200   0.37  0.39
 8   763.44  763.43     8978      0      358   0.000    1100   1.41  1.26
 9   763.41  763.13     8655      0      365   0.080     200   0.00  0.01
10   762.94  762.80     8322      0      239   0.310     150   0.00  0.00

11   762.74  762.65     8178      0      188   0.300     100   0.00  0.00
12   762.62  762.55     8082      0      161   0.260     100   0.00  0.00
13   762.52  762.79     8313      0      156   0.180     250   0.00  0.00
14   762.86  762.82     8342      0      213   0.040     250   0.58  0.59
15   762.77  762.70     8226      0      195   0.370     150   0.00  0.00

16   762.65  762.58     8111      0      169   0.290     100   0.00  0.00
17   762.57  762.51     8043      0      148   0.150      80   0.06  0.05
18   762.50  762.45     7985      0      133   0.320      70   0.00  0.00
19   762.44  762.42     7956      0      122   0.150      70   0.00  0.00
20   762.40  762.38     7918      0      115   0.090      70   0.24  0.21

21   762.39  762.35     7889      0      109   0.060      70   0.00  0.00
22   762.24  762.31     7851      0       96   0.220      70   0.00  0.00
23   762.30  762.29     7831      0       94   0.340      70   0.00  0.01
24   762.28  762.27     7812      0       91   0.070      70   0.00  0.00
25   762.26  762.26     7802      0       86   0.360      90   0.00  0.00

26   762.26  762.27     7812      0       88   0.340      90   0.48  0.42
27   762.28  762.28     7822      0       89   0.010     100   0.15  0.13
28   762.28  762.27     7812      0       89   0.250      90   0.02  0.02
29   762.27  762.27     7812      0       88   0.280      80   0.00  0.00
30   761.84  761.79     7368      0       30   0.200      70   0.00  0.00

TOTAL                             0     3431   6.230    3690   3.31  3.09
AVERAGE   762.29                  0      114             123 NORMAL= 3.46

MAXIMUM   763.52        9075   DATE= 8    TOP CONSERVATION POOL    761.50
MINIMUM   761.47        7087   DATE= 6    TOP FLOOD POOL           784.00

WATER SUPPLY:  WITHDRAWN      0 AC-FT, RELEASED      0 AC-FT

                      INFLOW VOLUME=     7319 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION