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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 DEC 09


    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  760.77     4857
 1   760.77  760.78     4863      0        0   0.070       3   0.00  0.00
 2   760.78  760.80     4875      0        0   0.070       3   0.00  0.00
 3   760.80  760.80     4875      0        0   0.090       3   0.05  0.11
 4   760.81  760.81     4881      0        0   0.080       3   0.00  0.00
 5   760.81  760.81     4881      0        0   0.050       3   0.00  0.00

 6   760.81  760.83     4893      0        0   0.090       3   0.00  0.00
 7   760.82  760.82     4887      0        0   0.010       3   0.00  0.01
 8   760.82  760.86     4910      0        0   0.020       3   0.00  0.00
 9   760.84  760.84     4898      0        0   0.030       3   0.03  0.04
10   760.84  760.84     4898      0        0   0.050       3   0.00  0.00

11   760.84  760.84     4898      0        0   0.040       3   0.00  0.00
12   760.84  760.84     4898      0        0   0.040       3   0.00  0.00
13   760.85  760.86     4910      0        0   0.010       3   0.00  0.00
14   760.90  760.87     4916      0        0   0.080       3   0.00  0.00
15   760.87  760.87     4916      0        0   0.080       3   0.00  0.00

16   760.87  760.87     4916      0        0   0.050       3   0.00  0.00
17   760.87  760.87     4916      0        0   0.060       3   0.00  0.00
18   760.88  760.89     4928      0        0   0.070       3   0.00  0.00
19   760.89  760.89     4928      0        0   0.090       3   0.00  0.00
20   760.89  760.90     4934      0        0   0.020       3   0.00  0.00

21   760.90  760.90     4934      0        0   0.060       3   0.00  0.00
22   760.90  760.91     4940      0        0   0.080       3   0.00  0.00
23   760.93  760.99     4987      0        0   0.010       0   0.00  0.00
24   761.00  761.17     5166      0        0   0.010       0   0.14  0.09
25   761.19  761.22     5216      0        0   0.050       0   0.15  0.26

26   761.24  761.27     5267      0        0   0.110       0   0.00  0.01
27   761.29  761.31     5308      0        0   0.060       0   0.00  0.01
28   761.32  761.34     5338      0        0   0.050       0   0.00  0.01
29   761.35  761.39     5389      0        0   0.050       0   0.00  0.09
30   761.41  761.47     5470      0        0   0.010     275   0.00  0.05
31   761.53  761.62     5622      0        2   0.000      80   0.18  0.20

TOTAL                             0        2   1.590     421   0.55  0.88
AVERAGE   760.98                  0        0              14 NORMAL= 1.62

MAXIMUM   761.62        5622   DATE=31    TOP CONSERVATION POOL    761.50
MINIMUM   760.76        4851   DATE= 1    TOP FLOOD POOL           784.00

                      INFLOW VOLUME=      835 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION