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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 MAY 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  638.63   572156
 1   638.88  639.32   594369      0        0   0.230   11500   0.75  0.14
 2   639.46  639.66   605529      0        0   0.250    5900   0.00  0.00
 3   639.79  640.05   618381      0        0   0.260    6800   0.00  0.00
 4   640.34  640.57   635968      0        0   0.250    9000   0.42  0.79
 5   640.75  641.19   657111      0     1083   0.090   12000   0.12  0.27

 6   641.44  641.79   677952      0     2743   0.250   13000   0.00  0.10
 7   641.95  642.18   691691      0     2752   0.010    9850   0.01  0.54
 8   642.24  642.33   697062      0     4742   0.110    7800   0.00  0.02
 9   642.30  642.88   716750      0     5940   0.240   16000   0.39  0.98
10   643.27  643.92   755060      0     5979   0.150   24000   0.32  0.07

11   644.16  644.36   771750      0     6008   0.110   12000   0.01  0.16
12   644.40  644.44   774802      0     6016   0.270    8000   0.00  0.00
13   644.45  644.45   775184      0     6018   0.280    6600   0.00  0.01
14   644.46  644.43   774420      0     6019   0.340    6300   0.00  0.00
15   644.44  644.43   774420      0     6018   0.280    6300   0.00  0.00

16   644.43  644.40   773277      0     6017   0.250    6000   0.00  0.00
17   644.40  644.36   771750      0     6015   0.290    5700   0.00  0.00
18   644.39  644.33   770607      0     6014   0.370    5700   0.00  0.00
19   644.29  644.27   768318      0     6011   0.340    5350   0.00  0.00
20   644.25  644.18   764884      0     6009   0.380    4500   0.00  0.00

21   644.13  644.02   758783      0     6004   0.360    3000   0.00  0.05
22   643.96  643.74   748405      0     7490   0.230    2400   0.00  0.00
23   643.63  643.39   735465      0     8257   0.270    2000   0.00  0.00
24   643.30  643.01   721415      0     8238   0.340    1000   0.00  0.15
25   642.88  642.56   705294      0     8215   0.220     600   0.07  0.04

26   642.39  642.09   688471      0     8189   0.400     500   0.00  0.06
27   641.87  641.56   669964      0     8158   0.220     400   0.02  0.02
28   641.33  641.09   653638      0     8131   0.370     300   0.00  0.00
29   640.86  640.56   635630      0     4055   0.350     200   0.00  0.00
30   640.44  640.26   625484      0     2717   0.340     100   0.00  0.01
31   640.21  640.15   621764      0     1628   0.290      50   0.01  0.14

TOTAL                             0   154465   8.140  192850   2.12  3.55
AVERAGE   642.58                  0     4983            6221 NORMAL= 5.09

MAXIMUM   644.52      777854   DATE=15    TOP CONSERVATION POOL    638.00
MINIMUM   638.63      572156   DATE= 1    TOP FLOOD POOL           661.00

WATER SUPPLY:  WITHDRAWN   4066 AC-FT

                      INFLOW VOLUME=   382512 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION