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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 APR 15


    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  761.70     5457
 1   761.71  761.70     5457      0        9   0.280      15   0.16  0.09
 2   761.70  761.69     5450      0        9   0.270      10   0.01  0.00
 3   761.70  761.66     5431      0        9   0.250       5   0.00  0.00
 4   761.64  761.63     5411      0        5   0.230       0   0.00  0.00
 5   761.64  761.64     5417      0        5   0.230       5   0.09  0.08

 6   761.64  761.64     5417      0        5   0.040       5   0.21  0.25
 7   761.64  761.64     5417      0        5   0.160      10   0.00  0.00
 8   761.64  761.65     5424      0        6   0.330      15   0.00  0.00
 9   761.65  761.64     5417      0        6   0.220      10   0.06  0.04
10   761.62  761.61     5397      0        4   0.370       0   0.00  0.00

11   761.60  761.62     5404      0        4   0.250      10   0.00  0.00
12   761.61  761.61     5397      0        4   0.090       5   0.17  0.10
13   761.64  761.83     5543      0        9   0.210      85   0.16  0.28
14   761.89  761.93     5610      0       28   0.070      65   0.62  0.72
15   761.93  761.91     5596      0       30   0.110      25   0.00  0.01

16   761.90  761.88     5576      0       27   0.100      20   0.00  0.00
17   761.86  761.83     5543      0       22   0.270      10   0.00  0.00
18   761.88  762.02     5673      0       31   0.200     100   0.09  0.22
19   762.14  762.25     5868      0       69   0.200     170   0.34  0.52
20   762.24  762.17     5800      0       80   0.180      50   0.14  0.11

21   762.13  762.07     5715      0       60   0.300      20   0.00  0.01
22   762.04  762.00     5656      0       46   0.270      20   0.00  0.16
23   761.98  761.95     5623      0       37   0.170      20   0.13  0.32
24   761.92  761.89     5583      0       30   0.100      15   0.02  0.01
25   761.88  761.86     5563      0       25   0.080      10   0.00  0.00

26   761.85  761.80     5523      0       20   0.360       5   0.00  0.00
27   761.79  761.86     5563      0       18   0.180      40   0.06  0.05
28   762.22  763.05     6554      0      155   0.100     655   1.35  1.42
29   762.99  762.78     6318      0      243   0.130     130   0.10  0.14
30   762.67  762.49     6072      0      167   0.280      50   0.00  0.00

TOTAL                             0     1169   6.030    1580   3.71  4.53
AVERAGE   761.91                  0       39              53 NORMAL= 3.46

MAXIMUM   763.05        6554   DATE=28    TOP CONSERVATION POOL    761.50
MINIMUM   761.60        5391   DATE=11    TOP FLOOD POOL           784.00

                      INFLOW VOLUME=     3134 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION