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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 JAN 07


    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  761.78     7359
 1   761.79  761.77     7350      0       16   0.050      30   0.00  0.00
 2   761.76  761.74     7324      0       13   0.060      10   0.00  0.00
 3   761.73  761.71     7298      0       11   0.050       5   0.00  0.00
 4   761.71  761.70     7289      0        9   0.100       3   0.03  0.01
 5   761.70  761.69     7280      0        9   0.030       1   0.00  0.00

 6   761.68  761.66     7254      0        7   0.040       0   0.00  0.00
 7   761.66  761.64     7236      0        6   0.040       0   0.00  0.00
 8   761.64  761.62     7219      0        5   0.100       0   0.00  0.00
 9   761.61  761.60     7201      0        4   0.130       0   0.00  0.00
10   761.60  761.58     7184      0        3   0.100       0   0.00  0.00

11   761.56  761.58     7184      0        2   0.160       0   0.00  0.00
12   761.61  761.65     7245      0        4   0.100       0   0.01  0.01
13   761.65  761.65     7245      0        6   0.010       0   0.00  0.70
14   761.66  761.68     7271      0        6   0.010       0   0.00  0.00
15   761.66  761.63     7228      0        6   0.010       0   0.00  0.52

16   761.63  761.61     7210      0        4   0.060       0   0.00  0.00
17   761.61  761.60     7201      0        3   0.030       0   0.00  0.00
18   761.60  761.59     7192      0        3   0.020       0   0.00  0.00
19   761.59  761.59     7192      0        3   0.030      15   0.22  0.00
20   761.59  761.69     7280      0        4   0.040      50   0.23  0.00

21   761.79  762.01     7562      0       23   0.000     150   0.61  0.68
22   762.10  762.14     7687      0       58   0.040     120   0.00  0.00
23   762.14  762.12     7668      0       63   0.040      70   0.00  0.00
24   762.12  762.09     7639      0       59   0.090      50   0.00  0.00
25   762.09  762.05     7600      0       53   0.070      30   0.00  0.00

26   762.03  762.00     7552      0       44   0.060      25   0.00  0.00
27   761.99  761.97     7526      0       39   0.140      20   0.03  0.01
28   761.94  761.91     7473      0       32   0.100      15   0.01  0.02
29   761.89  761.86     7429      0       26   0.080      10   0.00  0.00
30   761.85  761.83     7403      0       22   0.060      10   0.00  0.00
31   761.81  761.81     7385      0       19   0.080      10   0.00  0.00

TOTAL                             0      562   1.930     624   1.14  1.95
AVERAGE   761.77                  0       18              20 NORMAL= 1.49

MAXIMUM   762.14        7687   DATE=23    TOP CONSERVATION POOL    761.50
MINIMUM   761.56        7166   DATE=11    TOP FLOOD POOL           784.00

                      INFLOW VOLUME=     1238 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION