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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 APR 06


    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  637.00   522014
 1   637.02  636.90   519170      0        0   0.290     300   0.00  0.00
 2   636.98  637.03   522921      0        0   0.180     150   0.26  0.46
 3   637.05  637.04   523222      0        0   0.340     150   0.00  0.00
 4   637.03  637.02   522619      0        0   0.190     150   0.00  0.00
 5   637.01  636.99   521729      0        0   0.250     150   0.00  0.00

 6   636.93  636.98   521445      0        0   0.240     100   0.00  0.00
 7   636.96  637.13   525941      0        0   0.190     500   0.01  0.26
 8   637.08  637.00   522014      0        0   0.260     200   0.02  0.05
 9   636.99  636.97   521160      0        0   0.270     100   0.00  0.00
10   636.96  636.92   519738      0        0   0.280      50   0.00  0.00

11   636.72  636.80   516324      0        0   0.340      50   0.00  0.00
12   636.97  636.94   520307      0        0   0.220      50   0.00  0.00
13   636.91  636.79   516039      0        0   0.280      50   0.00  0.00
14   636.88  636.89   518885      0        0   0.350      50   0.00  0.00
15   636.81  636.82   516894      0        0   0.340      50   0.00  0.00

16   636.87  636.88   518600      0        0   0.260      50   0.00  0.02
17   636.89  636.85   517746      0        0   0.390      50   0.00  0.00
18   636.83  636.99   521729      0        0   0.370      50   0.00  0.01
19   636.85  636.82   516894      0        0   0.420      50   0.00  0.06
20   636.80  636.78   515756      0        0   0.370      50   0.00  0.37

21   636.77  636.71   513765      0        0   0.330      50   0.00  0.01
22   636.68  636.66   512341      0        0   0.310      50   0.00  0.00
23   636.67  636.71   513765      0        0   0.390      50   0.00  0.00
24   636.70  636.76   515187      0        0   0.300     850   0.00  0.44
25   636.95  637.00   522014      0        0   0.070    2500   1.89  1.01

26   636.99  636.94   520307      0        0   0.050     500   0.00  0.00
27   636.92  636.91   519453      0        0   0.120     200   0.00  0.00
28   636.89  637.05   523524      0        0   0.270    2200   0.00  0.04
29   637.27  637.66   541949      0        0   0.030    9500   2.05  1.83
30   638.05  638.63   572156      0        0   0.050   15500   1.29  0.72

TOTAL                             0        0   7.750   33750   5.52  5.28
AVERAGE   636.99                  0        0            1125 NORMAL= 3.63

MAXIMUM   638.63      572156   DATE=30    TOP CONSERVATION POOL    638.00
MINIMUM   636.65      512058   DATE=23    TOP FLOOD POOL           661.00

WATER SUPPLY:  WITHDRAWN   4165 AC-FT

                      INFLOW VOLUME=    66942 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION