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                               Ft Gibson Lake, OK
                          MONTHLY LAKE REPORT
                                 MAY 15


    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  555.52   394900
 1   555.36  554.77   380061   7999     7999   0.280     700   0.05  0.01
 2   554.79  554.56   376008   3648     3648   0.300    1800   0.03  0.00
 3   554.59  554.38   372534   3731     3731   0.340    2150   0.00  0.00
 4   554.32  554.74   379482   3619     3619   0.310    7300   0.00  0.00
 5   554.66  554.86   381798   3314     3314   0.320    4600   0.00  0.00

 6   555.03  555.13   387100   1768     1768   0.220    4600   0.12  0.59
 7   555.19  555.45   393500   1808     1808   0.290    5200   0.24  0.24
 8   555.49  558.94   468056      0        0   0.220   30000   0.02  0.30
 9   559.36  560.44   503160      0        0   0.000   14000   0.01  1.85
10   560.92  560.44   503160      0        0   0.050   11350   0.02  0.25

11   560.92  562.41   552218   9864     9864   0.090   17800   0.30  0.51
12   562.24  562.78   561803   9920    13836   0.270   18800   0.08  0.02
13   562.35  561.97   540849  10232    25298   0.250   14800   0.01  0.00
14   561.25  561.57   530850  10296    21093   0.080   16000   0.01  0.51
15   561.73  562.49   554291  10110    14867   0.210   26700   0.01  0.08

16   562.09  562.39   551701  15300    15300   0.120   28000   0.00  0.03
17   562.42  563.83   589744   3347     4954   0.240   28000   0.00  0.92
18   564.54  564.91   619597   6812    13665   0.210   28900   0.01  0.00
19   564.82  565.32   631316   9959    20281   0.280   26300   0.00  0.01
20   566.04  567.30   690130   1356     1562   0.130   31500   0.66  0.88

21   567.70  568.20   718340   9523    12831   0.050   27000   0.00  0.01
22   568.27  568.46   726713   8557    19368   0.130   23500   0.00  0.00
23   568.48  568.69   734118   9620    24547   0.080   28400   0.19  0.11
24   570.73  572.94   882962      0        0   0.140   75100   3.02  3.14
25   573.67  575.07   966805      0        0   0.050   42450   0.32  0.43

26   575.69  576.82  1040578    151      151   0.170   37650   0.66  0.55
27   577.39  578.18  1100926   1526     1526   0.260   32550   0.24  0.22
28   578.28  578.69  1124233   2941     7857   0.310   19750   0.00  0.00
29   578.93  580.12  1191532   8987    36016   0.120   70000   0.61  0.84
30   580.42  580.99  1233814   9894   100434   0.030  121700   1.38  1.62
31   581.22  581.19  1243819   9909   116390   0.050  121700   0.00  0.00

TOTAL                        174191   485727   5.600  918300   7.99 13.12
AVERAGE   565.42               5619    15669           29623 NORMAL= 5.37

MAXIMUM   581.32     1250332   DATE=31    TOP CONSERVATION POOL    554.00
MINIMUM   554.31      371183   DATE= 4    TOP FLOOD POOL           582.00

                      INFLOW VOLUME=  1821421 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION