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                                  Big Hill Lake
                          MONTHLY LAKE REPORT
                                 APR 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  858.77    27897
 1   858.73  858.59    27680      0       78   0.170      15   0.00  0.00
 2   858.57  858.52    27596      0       51   0.190       8   0.00  0.00
 3   858.49  858.46    27523      0       38   0.240       5   0.00  0.00
 4   858.41  858.34    27379      0       29   0.270       4   0.00  0.00
 5   858.32  858.31    27343      0       22   0.210       3   0.00  0.00

 6   858.27  858.27    27294      0       20   0.220       2   0.00  0.00
 7   858.26  858.22    27234      0       16   0.200       1   0.03  0.02
 8   858.22  858.20    27210      0       15   0.180       1   0.00  0.00
 9   858.20  858.20    27210      0       14   0.270      10   0.00  0.01
10   858.26  858.26    27282      0       16   0.040      20   0.34  0.34

11   858.20  858.17    27174      0       14   0.040       5   0.30  0.32
12   858.20  858.18    27186      0       12   0.180       4   0.00  0.00
13   858.16  858.11    27102      0       10   0.180       3   0.00  0.00
14   858.11  858.10    27089      0        7   0.180       2   0.00  0.00
15   858.10  858.15    27150      0        7   0.410       2   0.00  0.00

16   858.14  858.09    27077      0        8   0.380       2   0.00  0.00
17   858.09  858.08    27065      0        6   0.400       2   0.00  0.00
18   858.08  858.07    27053      0        5   0.360       2   0.00  0.00
19   858.07  858.07    27053      0        5   0.290       2   0.00  0.00
20   858.07  858.10    27089      0        6   0.100      30   0.06  0.30

21   858.13  858.14    27138      0        9   0.120      50   0.15  0.25
22   858.17  858.16    27162      0       10   0.260      20   0.38  0.28
23   858.17  859.17    28383      0       45   0.070     660   0.00  0.00
24   860.60  860.68    30259      0      654   0.010    1600   2.15  3.30
25   860.33  859.86    29232      0      579   0.110     100   0.00  0.00

26   859.82  859.45    28728      0      380   0.250      60   0.00  0.00
27   859.34  859.04    28223      0      231   0.300      40   0.00  0.00
28   858.97  858.85    27993      0      131   0.400      20   0.00  0.00
29   858.75  858.67    27776      0       92   0.490      10   0.00  0.00
30   858.65  858.64    27740      0       71   0.120      50   0.23  0.20

TOTAL                             0     2580   6.640    2733   3.64  5.02
AVERAGE   858.51                  0       86              91 NORMAL= 3.78

MAXIMUM   860.82       30435   DATE=24    TOP CONSERVATION POOL    858.00
MINIMUM   858.07       27053   DATE=20    TOP FLOOD POOL           867.50

                      INFLOW VOLUME=     5421 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION