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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 MAY 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  761.73     7315
 1   761.73  761.72     7306      0       11   0.250      10   0.00  0.00
 2   761.72  761.69     7280      0        9   0.380      10   0.00  0.00
 3   761.69  761.69     7280      0        8   0.300      10   0.00  0.00
 4   761.69  761.76     7342      0        9   0.190      50   0.00  0.00
 5   762.36  762.62     8149      0      124   0.140     500   1.21  1.11

 6   762.56  762.43     7966      0      143   0.340     100   0.00  0.00
 7   762.36  762.25     7793      0      101   0.140      20   0.00  0.02
 8   762.21  762.13     7677      0       73   0.220      10   0.00  0.00
 9   762.11  762.01     7562      0       52   0.290      10   0.00  0.00
10   761.99  761.95     7508      0       38   0.370      15   0.00  0.01

11   761.93  763.23     8762      0       86   0.160     700   0.07  0.06
12   763.40  763.08     8601      0      357   0.100     300   0.45  0.37
13   762.92  762.67     8197      0      225   0.280      40   0.00  0.00
14   762.56  762.40     7937      0      143   0.330      20   0.00  0.00
15   762.35  762.21     7754      0       95   0.340      15   0.00  0.00

16   762.17  762.07     7619      0       64   0.400      10   0.00  0.00
17   762.05  762.00     7552      0       45   0.330      15   0.00  0.00
18   762.12  762.52     8053      0       92   0.170     350   1.24  1.43
19   762.50  762.39     7928      0      130   0.190      80   0.09  0.12
20   762.35  762.29     7831      0      101   0.170      50   0.15  0.18

21   762.24  762.17     7716      0       81   0.200      30   0.22  0.19
22   762.15  762.06     7610      0       61   0.190      20   0.00  0.03
23   762.04  761.99     7543      0       45   0.370      10   0.00  0.00
24   761.97  761.92     7482      0       35   0.340      10   0.07  0.07
25   761.90  761.86     7429      0       27   0.310      10   0.00  0.00

26   761.85  761.82     7394      0       21   0.220      10   0.00  0.00
27   761.82  761.89     7456      0       20   0.270      60   0.00  0.00
28   762.66  762.80     8322      0      171   0.270     600   1.41  1.43
29   762.71  766.54    12739      0      512   0.310    2750   0.00  0.00
30   770.82  772.43    22337      0     1861   0.050    6700   4.54  4.25
31   771.92  770.80    19216      0     1909   0.120     350   0.00  0.00

TOTAL                             0     6652   7.740   12865   9.45  9.27
AVERAGE   762.95                  0      215             415 NORMAL= 5.04

MAXIMUM   772.53       22541   DATE=30    TOP CONSERVATION POOL    761.50
MINIMUM   761.68        7271   DATE= 4    TOP FLOOD POOL           784.00

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

                      INFLOW VOLUME=    25517 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION