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                               Ft Gibson Lake, OK
                          MONTHLY LAKE REPORT
                                 MAY 09


    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  556.64   417876
 1   556.95  562.94   565946   7695    10790   0.080   85450   0.08  0.59
 2   565.65  569.29   753785   3808     4260   0.010   99000   0.07  3.71
 3   570.37  572.71   874384   9859    21154   0.030   82000   0.74  0.67
 4   573.70  575.18   971370   9613    21932   0.030   70850   0.03  0.05
 5   575.60  576.12  1010548   9626    35444   0.030   55200   0.13  0.02

 6   576.42  576.56  1029424   9596    33273   0.020   43000   1.05  0.65
 7   576.45  575.90  1001251   9734    45435   0.150   31550   0.00  0.00
 8   575.56  575.34   978011   9755    50415   0.250   38800   0.00  0.01
 9   575.29  575.15   970126   9772    55289   0.090   51500   0.31  0.34
10   574.96  574.58   947059   9951    61786   0.160   50250   0.00  0.00

11   574.38  573.81   916466  10100    63730   0.080   48450   0.00  0.01
12   573.51  572.91   881842  10207    65127   0.110   47800   0.00  0.00
13   572.64  572.35   860954  10237    63708   0.120   53500   0.26  0.28
14   572.58  572.75   875875   9945    43317   0.280   50950   0.69  0.51
15   572.77  572.82   878486   9995    40536   0.100   42200   0.22  0.13

16   572.60  572.33   860210  10038    45496   0.310   36450   0.43  0.63
17   572.20  572.02   848647  10109    41011   0.140   35450   0.00  0.00
18   571.92  571.65   835371  10093    40690   0.290   34350   0.00  0.00
19   571.50  571.20   819260  10155    42094   0.310   34300   0.00  0.00
20   571.06  570.77   804143  10228    37863   0.340   30600   0.00  0.00

21   570.61  570.08   780269  10157    35875   0.340   24150   0.00  0.00
22   569.83  569.23   751781  10197    35478   0.310   21400   0.00  0.00
23   568.85  568.05   713510  10336    35011   0.280   15850   0.00  0.00
24   567.63  566.80   674820  10379    34320   0.160   14950   0.00  0.04
25   566.39  565.45   635060  10551    33701   0.140   13800   0.19  0.17

26   565.03  564.04   595411  10702    33006   0.180   13200   0.00  0.05
27   563.67  562.49   554291  11004    38068   0.200   17400   0.00  0.01
28   561.88  560.46   503641  11464    44911   0.060   19500   0.00  0.00
29   559.80  558.50   458200  11874    42799   0.220   20100   0.00  0.00
30   557.86  556.59   416832  12028    39941   0.320   19350   0.00  0.00
31   556.30  555.77   399900  11959    29675   0.370   21400   0.00  0.00

TOTAL                        311167  1226135   5.510 1222750   4.20  7.87
AVERAGE   569.48              10038    39553           39444 NORMAL= 5.37

MAXIMUM   576.60     1031139   DATE= 6    TOP CONSERVATION POOL    554.00
MINIMUM   555.73      399100   DATE=31    TOP FLOOD POOL           582.00

                      INFLOW VOLUME=  2425288 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION