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                                  Big Hill Lake
                          MONTHLY LAKE REPORT
                                 MAY 03


    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  858.19    27198
 1   858.38  858.39    27439      0       26   0.310     150   1.49  0.91
 2   858.40  858.36    27403      0       28   0.100      20   0.00  0.00
 3   858.34  858.29    27318      0       23   0.110      20   0.00  0.00
 4   858.29  858.33    27367      0       20   0.190      20   0.00  0.00
 5   858.38  858.34    27379      0       26   0.220      20   0.13  0.09

 6   858.33  858.30    27330      0       22   0.330      10   0.00  0.11
 7   858.28  858.25    27270      0       19   0.170      10   0.00  0.00
 8   858.29  858.27    27294      0       19   0.250      20   0.54  0.41
 9   858.29  858.26    27282      0       18   0.100      10   0.02  0.02
10   858.24  858.21    27222      0       16   0.230      10   0.02  0.13

11   858.21  858.17    27174      0       13   0.310      10   0.00  0.01
12   858.17  858.14    27138      0       10   0.320      10   0.00  0.00
13   858.11  858.18    27186      0       10   0.400      30   0.00  0.00
14   858.20  858.17    27174      0       12   0.020      10   0.79  0.60
15   858.16  858.16    27162      0       13   0.140      10   0.01  0.01

16   858.20  859.48    28764      0       80   0.020     900   0.30  0.60
17   859.81  859.80    29158      0      432   0.000     500   1.08  1.49
18   859.57  859.26    28494      0      333   0.220     130   0.00  0.00
19   859.20  859.01    28186      0      197   0.220      50   0.00  0.00
20   859.95  858.87    28017      0      221   0.120     140   0.08  0.45

21   858.86  858.75    27873      0      105   0.270      40   0.00  0.00
22   858.71  858.66    27764      0       77   0.240      30   0.00  0.00
23   858.59  858.56    27644      0       58   0.250      15   0.00  0.00
24   858.50  858.50    27572      0       45   0.190      12   0.00  0.00
25   858.49  858.48    27547      0       38   0.140       7   0.66  0.66

26   858.40  858.40    27451      0       32   0.150       3   0.00  0.00
27   858.34  858.37    27415      0       29   0.270       2   0.00  0.00
28   858.37  858.28    27306      0       22   0.340       2   0.00  0.00
29   858.24  858.19    27198      0       19   0.250       1   0.00  0.00
30   858.18  858.19    27198      0       13   0.410       1   0.00  0.00
31   858.19  858.15    27150      0       11   0.400       1   0.00  0.00

TOTAL                             0     1987   6.690    2194   5.12  5.49
AVERAGE   858.48                  0       64              71 NORMAL= 5.30

MAXIMUM   859.95       29343   DATE=20    TOP CONSERVATION POOL    858.00
MINIMUM   858.11       27102   DATE=13    TOP FLOOD POOL           867.50

                      INFLOW VOLUME=     4352 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION