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                                    Heyburn Lake
                          MONTHLY LAKE REPORT
                                 APR 97


    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  761.89     7456
 1   761.88  761.86     7429      0       24   0.090      15   0.00  0.00
 2   761.85  761.84     7412      0       22   0.210      15   0.00  0.00
 3   761.83  761.82     7394      0       19   0.130      15   0.00  0.00
 4   761.84  761.90     7464      0       22   0.130      50   0.27  0.19
 5   761.95  761.99     7543      0       35   0.020      75   0.38  0.35

 6   762.01  761.96     7517      0       39   0.330      50   0.00  0.00
 7   761.94  761.91     7473      0       33   0.170      10   0.00  0.00
 8   761.90  762.24     7783      0       40   0.040     200   0.08  0.12
 9   762.47  762.56     8091      0      136   0.000     300   0.71  0.90
10   762.53  762.42     7956      0      136   0.070      50   0.00  0.00

11   762.62  766.41    12567      0      871   0.180    3200   1.49  1.77
12   765.83  764.77    10498      0     1281   0.080     250   0.08  0.14
13   764.46  763.71     9279      0      747   0.000     125   0.00  0.00
14   763.46  763.08     8601      0      389   0.200      50   0.00  0.00
15   762.96  762.71     8236      0      231   0.170      50   0.00  0.00

16   762.64  762.59     8120      0      167   0.150     100   0.06  0.06
17   762.58  762.49     8024      0      149   0.110     100   0.30  0.38
18   762.46  762.34     7879      0      119   0.140      50   0.00  0.00
19   762.31  762.24     7783      0       93   0.130      50   0.00  0.00
20   762.20  762.15     7696      0       73   0.350      50   0.00  0.00

21   762.13  762.09     7639      0       61   0.240      50   0.00  0.00
22   762.10  762.07     7619      0       55   0.130      50   0.19  0.21
23   762.07  762.01     7562      0       48   0.100      25   0.00  0.00
24   762.00  761.98     7534      0       40   0.200      25   0.00  0.00
25   761.98  761.98     7534      0       37   0.100      50   0.12  0.09

26   761.98  762.00     7552      0       39   0.040      50   0.27  0.26
27   762.03  762.06     7610      0       47   0.030      75   0.22  0.19
28   762.03  762.04     7590      0       48   0.080      50   0.00  0.00
29   762.03  762.00     7552      0       44   0.100      25   0.00  0.00
30   761.99  761.96     7517      0       39   0.280      25   0.00  0.00

TOTAL                             0     5082   4.000    5230   4.17  4.66
AVERAGE   762.44                  0      169             174 NORMAL= 3.46

MAXIMUM   766.41       12567   DATE=11    TOP CONSERVATION POOL    761.50
MINIMUM   761.81        7385   DATE= 3    TOP FLOOD POOL           784.00

                      INFLOW VOLUME=    10374 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION