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                                  Big Hill Lake
                          MONTHLY LAKE REPORT
                                 APR 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  858.70    27813
 1   858.68  858.63    27728      0       73   0.290      40   0.00  0.00
 2   858.64  858.53    27608      0       58   0.330      15   0.00  0.00
 3   858.52  858.46    27523      0       42   0.500      10   0.00  0.00
 4   858.43  858.37    27415      0       32   0.310       5   0.00  0.00
 5   858.36  858.33    27367      0       25   0.230       1   0.00  0.00

 6   858.32  858.28    27306      0       21   0.070       1   0.06  0.06
 7   858.27  858.23    27246      0       17   0.160       1   0.01  0.01
 8   858.22  858.20    27210      0       14   0.170       0   0.00  0.00
 9   858.19  858.17    27174      0       12   0.190       0   0.00  0.00
10   858.17  858.16    27162      0       11   0.250       0   0.00  0.00

11   858.16  858.15    27150      0       11   0.050       5   0.04  0.09
12   858.14  858.13    27126      0        9   0.180       3   0.00  0.00
13   858.15  858.69    27800      0       23   0.150     350   0.00  0.03
14   859.22  859.47    28752      0      248   0.020     740   1.02  1.78
15   859.39  859.19    28408      0      267   0.100     100   0.09  0.11

16   859.12  858.95    28114      0      175   0.270      40   0.00  0.00
17   858.90  858.78    27909      0      116   0.340      10   0.00  0.00
18   858.74  858.65    27752      0       83   0.100      20   0.04  0.04
19   858.62  858.54    27620      0       59   0.250      10   0.00  0.00
20   858.52  858.46    27523      0       41   0.370       5   0.00  0.00

21   858.44  858.39    27439      0       32   0.390       5   0.00  0.00
22   858.37  858.34    27379      0       26   0.540       5   0.00  0.00
23   858.33  858.30    27330      0       22   0.340       5   0.00  0.00
24   858.29  858.30    27330      0       19   0.310      10   0.00  0.00
25   858.33  858.40    27451      0       23   0.130     100   0.66  0.69

26   858.52  858.62    27716      0       54   0.070     190   0.40  0.37
27   858.61  858.58    27668      0       60   0.110      50   0.00  0.00
28   858.56  858.51    27584      0       50   0.170      20   0.06  0.06
29   858.49  858.44    27499      0       38   0.340      10   0.00  0.00
30   858.42  858.39    27439      0       31   0.410       5   0.00  0.00

TOTAL                             0     1692   7.140    1756   2.38  3.24
AVERAGE   858.49                  0       56              59 NORMAL= 3.78

MAXIMUM   859.47       28752   DATE=14    TOP CONSERVATION POOL    858.00
MINIMUM   858.13       27126   DATE=12    TOP FLOOD POOL           867.50

                      INFLOW VOLUME=     3483 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION