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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 APR 03


    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  642.78   713171
 1   642.81  642.83   714960      0     5046   0.250    6000   0.00  0.00
 2   642.78  642.57   705653      0     7198   0.400    3400   0.00  0.01
 3   642.51  642.32   696703      0     8197   0.360    3950   0.00  0.00
 4   642.24  642.08   688112      0     8183   0.160    4150   0.00  0.00
 5   642.02  641.75   676564      0     8166   0.230    1400   0.00  0.00

 6   641.57  641.28   660238      0     8143   0.240    1250   0.04  0.48
 7   641.17  640.70   640365      0    11129   0.030    1050   0.70  0.20
 8   640.55  639.89   613080      0    13872   0.230    1000   0.00  0.00
 9   639.70  639.09   586820      0    13738   0.080    1000   0.00  0.00
10   638.91  638.60   571206      0     9183   0.200    1000   0.00  0.00

11   638.52  638.45   566460      0     3377   0.260    1000   0.00  0.00
12   638.42  638.37   563928      0     2241   0.260    1000   0.00  0.00
13   638.34  638.21   558865      0     2240   0.280     650   0.00  0.00
14   638.15  638.13   556333      0     1175   0.320     250   0.00  0.00
15   638.10  638.00   552219      0      448   0.370     250   0.00  0.00

16   637.95  638.24   559814      0      448   0.210    2500   0.25  0.20
17   638.21  638.22   559180      0      449   0.180     350   0.00  0.19
18   638.24  638.16   557282      0      448   0.190     250   0.00  0.00
19   638.16  638.30   561712      0      449   0.320     600   0.00  0.04
20   638.22  638.27   560764      0      449   0.070    2500   0.05  0.72

21   638.33  638.39   564561      0     1699   0.270    4000   0.00  0.00
22   638.37  638.36   563611      0     2685   0.310    2550   0.00  0.00
23   638.28  638.33   562663      0     2683   0.290    2350   0.00  0.00
24   638.33  638.39   564561      0     2685   0.090    4000   0.54  0.87
25   638.51  638.63   572156      0     4000   0.290    7950   0.00  0.14

26   638.66  638.70   574372      0     4916   0.070    6300   0.00  0.00
27   638.72  638.75   575954      0     4918   0.240    6600   0.00  0.02
28   638.81  638.90   580701      0     4923   0.320    6950   0.00  0.00
29   638.94  638.99   583548      0     4929   0.270    6950   0.00  0.17
30   638.97  639.09   586820      0     4932   0.310    6940   0.00  0.00

TOTAL                             0   142949   7.100   88140   1.58  3.04
AVERAGE   639.33                  0     4765            2938 NORMAL= 3.63

MAXIMUM   642.83      714960   DATE= 1    TOP CONSERVATION POOL    638.00
MINIMUM   636.49      507505   DATE= 9    TOP FLOOD POOL           661.00

WATER SUPPLY:  WITHDRAWN   4007 AC-FT

                      INFLOW VOLUME=   174823 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION