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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 DEC 04


    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  762.03     7581
 1   762.02  761.98     7534      0       42   0.030      20   0.00  0.00
 2   761.97  761.94     7499      0       35   0.080      20   0.00  0.00
 3   761.92  761.89     7456      0       29   0.080      10   0.00  0.00
 4   761.87  761.84     7412      0       23   0.080       5   0.00  0.00
 5   761.84  761.85     7420      0       22   0.090      25   0.00  0.01

 6   761.85  762.15     7696      0       30   0.000     150   0.27  0.23
 7   762.40  762.46     7995      0      115   0.010     250   0.46  0.51
 8   762.42  762.36     7899      0      116   0.080     100   0.00  0.00
 9   762.32  762.24     7783      0       94   0.070      50   0.00  0.00
10   762.21  762.12     7668      0       72   0.130      20   0.00  0.00

11   762.09  762.00     7552      0       52   0.150      10   0.00  0.00
12   761.98  761.94     7499      0       37   0.090       7   0.00  0.00
13   761.91  761.88     7447      0       29   0.200       5   0.00  0.00
14   761.85  761.82     7394      0       22   0.140       5   0.00  0.00
15   761.81  761.79     7368      0       18   0.060       5   0.00  0.00

16   761.79  761.77     7350      0       16   0.090       5   0.00  0.00
17   761.76  761.76     7342      0       14   0.060       5   0.00  0.00
18   761.76  761.74     7324      0       13   0.070       5   0.00  0.00
19   761.73  761.73     7315      0       12   0.110       5   0.00  0.00
20   761.72  761.69     7280      0        9   0.080       5   0.00  0.00

21   761.69  761.69     7280      0        8   0.140       5   0.00  0.00
22   761.67  761.66     7254      0        7   0.160       5   0.00  0.00
23   761.64  761.64     7236      0        6   0.070       5   0.00  0.00
24   761.64  761.63     7228      0        5   0.070       5   0.00  0.00
25   761.63  761.63     7228      0        5   0.050       5   0.00  0.00

26   761.63  761.62     7219      0        4   0.050       5   0.00  0.00
27   761.62  761.62     7219      0        4   0.070       5   0.00  0.00
28   761.63  761.63     7228      0        4   0.090       5   0.00  0.00
29   761.63  761.63     7228      0        5   0.040       5   0.00  0.00
30   761.64  761.64     7236      0        5   0.080       5   0.00  0.00
31   761.65  761.65     7245      0        6   0.120       5   0.00  0.00

TOTAL                             0      859   2.640     762   0.73  0.75
AVERAGE   761.84                  0       28              25 NORMAL= 1.62

MAXIMUM   762.47        8005   DATE= 7    TOP CONSERVATION POOL    761.50
MINIMUM   761.61        7210   DATE=28    TOP FLOOD POOL           784.00

                      INFLOW VOLUME=     1511 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION