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                                  Big Hill Lake
                          MONTHLY LAKE REPORT
                                 MAY 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  860.90    30535
 1   861.56  861.46    31253      0      877   0.050    1240   1.24  1.01
 2   861.11  860.41    29919      0      787   0.060     120   0.50  0.48
 3   860.26  860.10    29530      0      595   0.110     400   0.44  0.38
 4   859.92  859.55    28850      0      444   0.110     110   0.01  0.02
 5   859.42  859.22    28445      0      279   0.140      70   0.00  0.00

 6   859.15  859.00    28174      0      188   0.040      60   0.23  0.22
 7   858.94  858.83    27969      0      127   0.170      40   0.00  0.00
 8   858.92  859.11    28309      0      143   0.300     320   0.55  0.92
 9   859.05  858.92    28078      0      157   0.250      50   0.03  0.07
10   858.85  858.75    27873      0      108   0.200      10   0.00  0.00

11   858.72  858.63    27728      0       79   0.120      10   0.03  0.04
12   858.59  858.56    27644      0       58   0.290      10   0.00  0.00
13   858.55  858.54    27620      0       49   0.110      60   0.38  0.32
14   858.50  858.47    27535      0       40   0.270      10   0.27  0.27
15   858.43  858.47    27535      0       34   0.270      10   0.00  0.00

16   858.61  858.61    27704      0       60   0.320     180   0.56  0.60
17   858.58  858.52    27596      0       53   0.240      10   0.00  0.00
18   858.49  858.44    27499      0       38   0.320       5   0.00  0.00
19   858.43  858.38    27427      0       31   0.350       5   0.00  0.00
20   858.37  858.32    27355      0       25   0.350       5   0.00  0.00

21   858.31  858.28    27306      0       20   0.380       5   0.00  0.00
22   858.27  858.24    27258      0       18   0.330       5   0.00  0.00
23   858.24  858.21    27222      0       15   0.310       5   0.00  0.00
24   858.20  858.18    27186      0       13   0.350       5   0.00  0.00
25   858.17  858.17    27174      0       11   0.290       5   0.00  0.04

26   858.17  858.15    27150      0       11   0.110      10   0.29  0.23
27   858.15  858.12    27114      0        9   0.290       5   0.00  0.01
28   858.12  858.10    27089      0        8   0.060       5   0.00  0.02
29   858.10  858.09    27077      0        6   0.120       5   0.00  0.00
30   858.09  858.06    27041      0        5   0.310       5   0.00  0.00
31   858.06  858.05    27029      0        4   0.360       5   0.00  0.00

TOTAL                             0     4293   6.980    2785   4.53  4.63
AVERAGE   858.71                  0      138              90 NORMAL= 5.30

MAXIMUM   861.57       31394   DATE= 1    TOP CONSERVATION POOL    858.00
MINIMUM   858.05       27029   DATE=31    TOP FLOOD POOL           867.50

                      INFLOW VOLUME=     5524 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION