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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 APR 07


    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  643.58   742491
 1   643.83  644.06   760308      0        0   0.200    9350   0.00  0.00
 2   644.15  643.94   755801      0     4575   0.270    5000   0.00  0.00
 3   643.79  643.86   752842      0     6996   0.310    3570   0.00  0.00
 4   643.73  643.57   742120      0     5076   0.250     100   0.00  0.00
 5   643.57  643.49   739162      0     5070   0.250     100   0.00  0.00

 6   643.40  643.28   731399      0     5066   0.090    3010   0.02  0.10
 7   643.28  643.16   726960      0     5061   0.120    3070   0.00  0.00
 8   643.10  642.98   720328      0     5055   0.160    3070   0.00  0.00
 9   642.95  642.86   716033      0     5050   0.090    3070   0.00  0.00
10   642.83  642.71   710665      0     5046   0.150    3070   0.00  0.00

11   642.65  642.63   707800      0     5042   0.030    4010   0.00  0.08
12   642.62  642.60   706725      0     5040   0.210    4820   0.00  0.00
13   642.56  642.65   708517      0     5040   0.240    6040   0.00  0.09
14   642.98  643.52   740272      0     5056   0.020   21210   0.21  1.73
15   643.85  644.34   770989      0     5085   0.070   20890   0.00  0.05

16   644.53  644.60   780904      0     7168   0.230   12540   0.00  0.00
17   644.51  644.26   767937      0    10047   0.270    3660   0.00  0.00
18   644.09  643.79   750254      0    10020   0.070    1430   0.15  0.09
19   643.67  643.52   740272      0     8406   0.230    3760   0.00  0.00
20   643.50  643.55   741380      0     5981   0.290    6910   0.00  0.00

21   643.58  643.67   745817      0     5984   0.280    8670   0.00  0.00
22   643.56  643.74   748405      0     5986   0.350    7530   0.00  0.00
23   643.82  643.98   757279      0     4316   0.150    9050   0.00  0.00
24   643.97  644.24   767173      0     4629   0.170    9730   0.00  0.00
25   644.38  644.48   776327      0     6502   0.040   11310   0.40  0.60

26   644.51  644.53   778236      0     8677   0.110    9790   0.00  0.36
27   644.56  644.51   777472      0     9448   0.070    9330   0.00  0.00
28   644.48  644.37   772132      0    10049   0.180    7750   0.00  0.02
29   644.30  644.13   762978      0    10036   0.290    5850   0.00  0.00
30   644.03  643.70   746927      0    12170   0.320    4370   0.00  0.00

TOTAL                             0   191679   5.510  202060   0.78  3.12
AVERAGE   643.69                  0     6389            6735 NORMAL= 3.63

MAXIMUM   644.64      782431   DATE=16    TOP CONSERVATION POOL    638.00
MINIMUM   642.56      705294   DATE=13    TOP FLOOD POOL           661.00

WATER SUPPLY:  WITHDRAWN   4165 AC-FT

                      INFLOW VOLUME=   400780 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION