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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 JUL 97


    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  761.89     7456
 1   761.89  761.85     7420      0       25   0.250      20   0.00  0.00
 2   761.84  761.81     7385      0       20   0.410      10   0.00  0.00
 3   761.80  761.83     7403      0       17   0.340      35   0.00  0.00
 4   762.51  762.57     8101      0      133   0.360     500   2.45  1.71
 5   762.49  762.32     7860      0      126   0.230      10   0.00  0.02

 6   762.25  762.15     7696      0       80   0.300       5   0.00  0.00
 7   762.11  762.01     7562      0       54   0.250       5   0.00  0.00
 8   761.98  761.92     7482      0       36   0.330       5   0.00  0.00
 9   761.91  761.86     7429      0       27   0.370       5   0.00  0.00
10   761.85  762.07     7619      0       27   0.340     125   0.00  0.00

11   762.08  762.07     7619      0       54   0.200      50   0.25  0.23
12   762.04  761.98     7534      0       45   0.320      10   0.05  0.13
13   761.95  761.90     7464      0       32   0.390       5   0.00  0.00
14   761.88  761.83     7403      0       24   0.440       5   0.00  0.00
15   761.81  761.76     7342      0       17   0.290       5   0.00  0.00

16   761.76  761.73     7315      0       13   0.240       5   0.00  0.01
17   761.72  761.71     7298      0       10   0.370       5   0.00  0.00
18   761.77  762.31     7851      0       41   0.110     325   1.33  1.63
19   762.33  762.97     8486      0      129   0.140     450   0.69  0.45
20   762.98  762.75     8274      0      234   0.100     125   0.03  0.49

21   762.83  762.45     7985      0      168   0.250      25   0.00  0.00
22   762.38  762.22     7764      0      102   0.320      10   0.00  0.00
23   762.19  762.10     7648      0       68   0.320      10   0.00  0.00
24   762.07  761.97     7526      0       46   0.310       5   0.00  0.00
25   761.94  761.88     7447      0       31   0.350       5   0.00  0.00

26   761.86  761.82     7394      0       22   0.400       5   0.00  0.00
27   761.81  761.78     7359      0       18   0.350       5   0.00  0.00
28   761.77  761.74     7324      0       14   0.350       5   0.00  0.00
29   761.74  761.75     7333      0       13   0.340      15   0.21  0.08
30   761.75  761.70     7289      0       11   0.070       5   0.05  0.20
31   761.69  761.66     7254      0        8   0.300       0   0.00  0.00

TOTAL                             0     1643   9.140    1795   5.06  4.95
AVERAGE   762.02                  0       53              58 NORMAL= 3.01

MAXIMUM   762.98        8496   DATE=20    TOP CONSERVATION POOL    761.50
MINIMUM   761.66        7254   DATE=31    TOP FLOOD POOL           784.00

                      INFLOW VOLUME=     3560 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION