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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 APR 01


    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  761.91     7473
 1   761.91  761.89     7456      0       28   0.150      25   0.05  0.04
 2   761.87  761.89     7456      0       26   0.200      25   0.00  0.00
 3   761.89  761.90     7464      0       27   0.090      25   0.00  0.00
 4   761.90  761.89     7456      0       27   0.190      25   0.00  0.00
 5   761.89  761.88     7447      0       26   0.230      25   0.00  0.00

 6   761.88  761.86     7429      0       25   0.190      25   0.00  0.00
 7   761.87  761.85     7420      0       23   0.230      25   0.00  0.00
 8   761.84  761.83     7403      0       21   0.380      25   0.00  0.00
 9   761.83  761.83     7403      0       20   0.320      25   0.00  0.00
10   761.83  761.83     7403      0       20   0.270      25   0.00  0.00

11   761.88  761.89     7456      0       24   0.120      50   0.47  0.43
12   761.89  761.88     7447      0       26   0.420      50   0.00  0.01
13   761.87  761.85     7420      0       24   0.170      30   0.00  0.00
14   761.85  761.83     7403      0       21   0.260      20   0.00  0.00
15   761.85  761.84     7412      0       21   0.100      20   0.24  0.20

16   761.83  761.82     7394      0       20   0.260      20   0.00  0.00
17   761.81  761.79     7368      0       18   0.210      10   0.00  0.00
18   761.79  761.77     7350      0       16   0.210      10   0.00  0.00
19   761.78  761.75     7333      0       14   0.290      10   0.00  0.00
20   761.76  761.76     7342      0       13   0.200      20   0.00  0.00

21   761.76  761.77     7350      0       14   0.180      20   0.00  0.00
22   761.77  761.81     7385      0       15   0.120      40   0.00  0.00
23   761.86  761.87     7438      0       24   0.140      60   0.14  0.32
24   761.87  761.85     7420      0       23   0.250      20   0.00  0.00
25   761.84  761.83     7403      0       21   0.240      20   0.00  0.00

26   761.82  761.80     7377      0       19   0.290      20   0.00  0.00
27   761.80  761.78     7359      0       17   0.380      15   0.00  0.00
28   761.78  761.77     7350      0       15   0.310      15   0.00  0.00
29   761.76  761.75     7333      0       14   0.230      15   0.00  0.00
30   761.75  761.73     7315      0       12   0.380      10   0.00  0.00

TOTAL                             0      614   7.010     725   0.90  1.00
AVERAGE   761.83                  0       20              24 NORMAL= 3.46

MAXIMUM   761.91        7473   DATE= 1    TOP CONSERVATION POOL    761.50
MINIMUM   761.73        7315   DATE=30    TOP FLOOD POOL           784.00

WATER SUPPLY:  WITHDRAWN      0 AC-FT, RELEASED      0 AC-FT

                      INFLOW VOLUME=     1438 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION