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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 MAR 03


    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  761.48     7096
 1   761.49  761.50     7114      0        0   0.010      10   0.00  0.02
 2   761.51  761.52     7131      0        0   0.030      10   0.00  0.02
 3   761.52  761.53     7140      0        0   0.050      10   0.00  0.00
 4   761.53  761.55     7157      0        1   0.240       5   0.00  0.00
 5   761.56  761.54     7149      0        1   0.070       5   0.00  0.00

 6   761.54  761.54     7149      0        1   0.020       5   0.00  0.00
 7   761.54  761.55     7157      0        1   0.090       5   0.00  0.00
 8   761.55  761.54     7149      0        1   0.160       4   0.00  0.00
 9   761.55  761.54     7149      0        1   0.220       3   0.00  0.00
10   761.53  761.53     7140      0        1   0.150       2   0.00  0.00

11   761.52  761.52     7131      0        0   0.140       1   0.00  0.00
12   761.52  761.52     7131      0        0   0.050       1   0.00  0.00
13   761.52  761.52     7131      0        0   0.050      10   0.21  0.20
14   761.52  761.54     7149      0        1   0.010       5   0.00  0.00
15   761.54  761.54     7149      0        1   0.140       5   0.00  0.00

16   761.54  761.54     7149      0        1   0.230       5   0.00  0.00
17   761.54  761.55     7157      0        1   0.160       5   0.00  0.00
18   761.55  762.41     7947      0       22   0.090     400   0.14  0.33
19   763.42  763.68     9247      0      402   0.000    1000   2.54  2.18
20   763.31  763.25     8784      0      413   0.050     250   0.36  0.30

21   763.15  762.80     8322      0      278   0.060      50   0.00  0.00
22   762.67  762.47     8005      0      166   0.200      10   0.00  0.00
23   762.41  762.26     7802      0      108   0.190      10   0.00  0.00
24   762.19  762.08     7629      0       69   0.260      10   0.00  0.00
25   762.08  762.00     7552      0       50   0.330      10   0.08  0.06

26   761.97  761.91     7473      0       34   0.080      10   0.00  0.00
27   761.88  761.87     7438      0       26   0.250      10   0.00  0.00
28   761.90  761.93     7491      0       29   0.210      50   0.61  0.55
29   761.95  761.91     7473      0       32   0.080      30   0.00  0.00
30   761.90  761.87     7438      0       27   0.230      15   0.00  0.00
31   761.85  761.82     7394      0       21   0.160      10   0.00  0.00

TOTAL                             0     1688   4.010    1956   3.94  3.66
AVERAGE   761.88                  0       54              63 NORMAL= 2.70

MAXIMUM   763.68        9247   DATE=19    TOP CONSERVATION POOL    761.50
MINIMUM   761.48        7096   DATE= 1    TOP FLOOD POOL           784.00

                      INFLOW VOLUME=     3880 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION