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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 APR 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  763.55     7406
 1   763.34  762.98     6846      0      348   0.240      70   0.00  0.00
 2   762.86  762.60     6521      0      207   0.250      50   0.00  0.00
 3   762.51  762.36     6316      0      131   0.080      30   0.00  0.00
 4   762.29  762.20     6179      0       87   0.240      20   0.00  0.00
 5   762.18  762.07     6068      0       65   0.340      10   0.00  0.00

 6   762.02  761.94     5947      0       42   0.190      10   0.00  0.00
 7   761.92  761.88     5886      0       29   0.250       5   0.00  0.00
 8   761.87  761.84     5846      0       23   0.250       5   0.00  0.00
 9   761.83  761.83     5835      0       20   0.310       5   0.00  0.00
10   761.82  761.76     5764      0       17   0.270       5   0.00  0.00

11   761.76  761.73     5734      0       13   0.150       5   0.00  0.00
12   761.85  763.26     7120      0      104   0.270     800   0.96  1.06
13   763.65  763.46     7317      0      451   0.000     550   0.66  0.67
14   763.28  762.96     6829      0      333   0.060     100   0.00  0.00
15   762.84  762.61     6530      0      203   0.220      50   0.00  0.00

16   762.52  762.37     6324      0      134   0.220      40   0.00  0.00
17   762.31  762.21     6188      0       92   0.240      20   0.00  0.00
18   762.19  762.17     6153      0       72   0.060      50   0.07  0.14
19   762.23  762.36     6316      0       91   0.030     180   0.16  0.43
20   762.36  762.30     6264      0      103   0.120      90   0.01  0.00

21   762.27  762.18     6162      0       84   0.280      40   0.00  0.00
22   762.15  762.08     6076      0       62   0.300      30   0.00  0.00
23   762.06  761.99     5998      0       47   0.360      20   0.00  0.00
24   761.97  761.94     5947      0       35   0.360      15   0.00  0.00
25   761.92  761.89     5896      0       29   0.300      10   0.00  0.00

26   761.88  761.89     5896      0       25   0.180      30   0.00  0.00
27   761.92  761.99     5998      0       33   0.120      90   0.45  0.73
28   762.00  761.97     5978      0       39   0.150      50   0.00  0.00
29   761.95  763.97     7820      0      170   0.060    1100   0.00  0.01
30   764.76  764.96     8922      0      970   0.000    1500   1.59  1.60

TOTAL                             0     4060   5.900    4980   3.90  4.64
AVERAGE   762.39                  0      135             166 NORMAL= 3.46

MAXIMUM   765.15        9154   DATE=30    TOP CONSERVATION POOL    761.50
MINIMUM   761.73        5734   DATE=11    TOP FLOOD POOL           784.00

                      INFLOW VOLUME=     9878 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION