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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 APR 12


    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  761.93     5610
 1   761.91  761.88     5576      0       28   0.230      20   0.00  0.00
 2   761.87  761.85     5557      0       24   0.340      20   0.00  0.00
 3   761.84  761.82     5537      0       21   0.270      15   0.00  0.01
 4   761.82  761.80     5523      0       19   0.050      10   0.00  0.03
 5   761.78  761.76     5497      0       15   0.150       5   0.00  0.01

 6   761.76  761.74     5484      0       13   0.110       5   0.00  0.00
 7   761.73  761.73     5477      0       12   0.110       5   0.00  0.00
 8   761.73  761.72     5470      0       11   0.060       5   0.02  0.05
 9   761.72  761.71     5464      0       10   0.090       5   0.00  0.00
10   761.71  761.70     5457      0       10   0.180      15   0.00  0.00

11   761.75  761.78     5510      0       13   0.250      40   0.40  0.37
12   761.79  761.78     5510      0       16   0.060      20   0.00  0.04
13   761.78  761.79     5517      0       15   0.180      20   0.00  0.00
14   761.82  761.82     5537      0       18   0.090      30   0.43  0.63
15   761.90  762.18     5809      0       42   0.160     180   0.49  0.45

16   762.18  762.13     5766      0       68   0.180      50   0.10  0.10
17   762.09  762.03     5681      0       53   0.220      20   0.00  0.00
18   762.00  761.94     5616      0       39   0.240      10   0.00  0.00
19   761.92  761.89     5583      0       29   0.280      20   0.00  0.00
20   762.01  762.11     5749      0       48   0.300     130   0.66  0.70

21   762.09  762.04     5690      0       53   0.190      50   0.01  0.00
22   762.02  761.95     5623      0       42   0.230      20   0.00  0.00
23   761.93  761.88     5576      0       30   0.330      15   0.00  0.00
24   761.87  761.83     5543      0       23   0.240      15   0.00  0.00
25   761.82  761.79     5517      0       18   0.360      10   0.00  0.00

26   761.79  761.76     5497      0       16   0.260      10   0.00  0.00
27   761.75  761.73     5477      0       12   0.230      10   0.00  0.00
28   761.73  761.71     5464      0       10   0.270       5   0.00  0.00
29   761.70  761.68     5444      0        9   0.120       5   0.02  0.06
30   761.72  761.71     5464      0       10   0.120      25   0.36  0.52

TOTAL                             0      727   5.900     790   2.49  2.97
AVERAGE   761.84                  0       24              26 NORMAL= 3.46

MAXIMUM   762.18        5809   DATE=16    TOP CONSERVATION POOL    761.50
MINIMUM   761.68        5444   DATE=29    TOP FLOOD POOL           784.00

                      INFLOW VOLUME=     1567 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION