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                                  Big Hill Lake
                          MONTHLY LAKE REPORT
                                 MAY 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  858.64    27740
 1   858.69  858.67    27776      0       76   0.120      80   0.48  0.63
 2   858.70  858.57    27656      0       66   0.210      30   0.00  0.00
 3   858.54  858.48    27547      0       46   0.260      10   0.00  0.00
 4   858.44  858.38    27427      0       33   0.320       5   0.00  0.00
 5   858.35  858.36    27403      0       26   0.310       5   0.00  0.00

 6   858.35  858.30    27330      0       23   0.450       5   0.00  0.00
 7   858.30  858.22    27234      0       17   0.440       4   0.00  0.00
 8   858.21  858.19    27198      0       14   0.340       4   0.00  0.00
 9   858.18  858.16    27162      0       12   0.390       4   0.00  0.00
10   858.15  858.15    27150      0       10   0.380       3   0.00  0.00

11   858.15  858.13    27126      0       10   0.190       3   0.00  0.00
12   858.13  858.12    27114      0        8   0.310       3   0.00  0.00
13   858.18  859.00    28174      0       42   0.130     570   0.45  0.38
14   859.26  859.17    28383      0      217   0.000     300   1.63  2.04
15   859.14  859.04    28223      0      178   0.120      70   0.04  0.03

16   858.92  858.78    27909      0      123   0.260      30   0.00  0.00
17   858.75  858.63    27728      0       80   0.270      15   0.00  0.00
18   858.60  858.53    27608      0       56   0.340       5   0.00  0.00
19   858.52  858.43    27487      0       39   0.230       5   0.01  0.05
20   858.42  858.37    27415      0       30   0.380       5   0.00  0.00

21   858.35  858.32    27355      0       24   0.470       4   0.00  0.00
22   858.29  858.24    27258      0       18   0.440       4   0.00  0.00
23   858.27  858.26    27282      0       17   0.350       4   0.00  0.00
24   858.25  858.21    27222      0       14   0.360       4   0.00  0.00
25   858.21  858.19    27198      0       13   0.270       3   0.00  0.01

26   858.18  858.15    27150      0       11   0.040      10   0.01  0.02
27   858.15  858.24    27258      0       11   0.110      20   0.01  0.23
28   858.20  858.15    27150      0       12   0.320      20   0.00  0.00
29   858.10  858.09    27077      0        6   0.390      15   0.00  0.00
30   858.08  858.16    27162      0        6   0.340      15   0.00  0.00
31   858.17  858.13    27126      0        8   0.380      10   0.00  0.00

TOTAL                             0     1247   8.920    1265   2.63  3.39
AVERAGE   858.38                  0       40              41 NORMAL= 5.30

MAXIMUM   859.26       28494   DATE=14    TOP CONSERVATION POOL    858.00
MINIMUM   858.05       27029   DATE=30    TOP FLOOD POOL           867.50

                      INFLOW VOLUME=     2509 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION