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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 JUL 98


    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  761.47     7087
 1   761.58  762.04     7590      0       17   0.090     275   2.05  1.41
 2   762.06  762.12     7668      0       53   0.150     100   0.83  1.41
 3   762.11  762.04     7590      0       55   0.270      25   0.00  0.06
 4   762.01  761.94     7499      0       40   0.390      10   0.00  0.00
 5   761.91  761.87     7438      0       28   0.340       5   0.00  0.00

 6   761.82  761.80     7377      0       20   0.330       0   0.00  0.00
 7   761.79  761.76     7342      0       16   0.420       0   0.00  0.00
 8   761.77  761.75     7333      0       14   0.390      25   0.52  0.58
 9   761.75  761.72     7306      0       12   0.240      10   0.00  0.05
10   761.72  761.67     7263      0       10   0.370       0   0.00  0.00

11   761.66  761.65     7245      0        7   0.440       0   0.00  0.09
12   761.65  761.63     7228      0        5   0.170       0   0.25  0.18
13   761.62  761.61     7210      0        4   0.310       0   0.00  0.00
14   761.61  761.59     7192      0        3   0.300       0   0.00  0.00
15   761.58  761.56     7166      0        2   0.330       0   0.00  0.00

16   761.55  761.53     7140      0        1   0.340       0   0.00  0.00
17   761.52  761.50     7114      0        0   0.370       0   0.00  0.00
18   761.49  761.47     7087      0        0   0.370       0   0.00  0.00
19   761.46  761.44     7061      0        0   0.450       0   0.00  0.00
20   761.43  761.41     7035      0        0   0.420       0   0.00  0.00

21   761.41  761.38     7008      0        0   0.480       0   0.00  0.00
22   761.38  761.35     6982      0        0   0.490       0   0.00  0.00
23   761.34  761.32     6956      0        0   0.460       0   0.00  0.00
24   761.31  761.30     6938      0        0   0.400       0   0.00  0.00
25   761.29  761.27     6912      0        0   0.280       0   0.00  0.00

26   761.26  761.23     6877      0        0   0.700       0   0.00  0.00
27   761.22  761.20     6850      0        0   0.510       0   0.00  0.00
28   761.20  761.17     6824      0        0   0.350       0   0.00  0.00
29   761.17  761.14     6798      0        0   0.280       0   0.00  0.00
30   761.13  761.10     6763      0        0   0.450       0   0.00  0.00
31   761.09  761.07     6736      0        0   0.510       0   0.00  0.00

TOTAL                             0      288   11.400     450   3.65  3.78
AVERAGE   761.54                  0        9              15 NORMAL= 3.01

MAXIMUM   762.12        7668   DATE= 2    TOP CONSERVATION POOL    761.50
MINIMUM   761.07        6736   DATE=31    TOP FLOOD POOL           784.00

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

                      INFLOW VOLUME=      893 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION