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                               Ft Gibson Lake, OK
                          MONTHLY LAKE REPORT
                                 APR 04


    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  556.34   411607
 1   556.25  556.04   405336   5838    27926   0.190   25400   0.00  0.00
 2   555.93  556.05   405545   5743    22372   0.230   22000   0.00  0.00
 3   556.11  555.51   394700   5668    19044   0.230   14000   0.00  0.00
 4   555.57  554.97   383920   5596    18443   0.200   13100   0.00  0.00
 5   555.11  554.76   379868   5618    14800   0.230   12800   0.00  0.00

 6   555.07  554.75   379675   5514    12242   0.190   12300   0.00  0.00
 7   555.05  554.76   379868   5564    12236   0.200   12300   0.06  0.02
 8   555.06  554.93   383149   5490    12275   0.140   14000   0.04  0.01
 9   555.25  555.05   385500   5452    12296   0.230   13500   0.00  0.00
10   555.08  555.09   386301   5414     9306   0.050    9800   0.32  0.44

11   555.07  555.62   396900   5398     7858   0.050   13000   0.02  0.19
12   555.84  555.46   393700   5360    10846   0.170    9500   0.01  0.01
13   555.74  555.23   389100   6260    13790   0.190   11700   0.00  0.00
14   555.56  554.99   384307   7446     7500   0.160    5200   0.01  0.00
15   554.75  554.18   368674   5540    12594   0.330    4900   0.00  0.00

16   554.19  554.26   370218   3420     7715   0.370    8650   0.00  0.00
17   554.32  554.29   370797   5381     5381   0.320    5850   0.00  0.00
18   554.29  554.36   372148   5361     5361   0.290    6150   0.00  0.00
19   554.38  554.49   374657   5328     5328   0.210    6600   0.00  0.00
20   554.54  554.50   374850   4991     4991   0.090    5100   0.00  0.03

21   554.66  554.84   381413   5009     5009   0.090    8400   0.08  0.41
22   555.51  556.47   414322   5361     5361   0.170   22000   0.82  0.81
23   557.59  558.30   453720   5320     5320   0.220   25000   2.32  0.60
24   558.77  560.79   511559   2068     2068   0.050   31000   0.64  0.42
25   561.91  563.82   589476   3003     3003   0.060   42500   0.29  0.06

26   564.68  565.73   643123   5838    17396   0.250   44650   0.14  0.04
27   566.07  566.74   673026   9426    35830   0.240   51000   0.00  0.01
28   566.99  566.46   664655  10772    39424   0.390   35000   0.04  0.01
29   565.95  564.98   621543  10458    40283   0.320   18700   0.27  0.08
30   564.43  563.22   573395  10690    43179   0.170   19000   0.11  0.06

TOTAL                        178327   439177   6.030  523100   5.17  3.20
AVERAGE   557.35               5944    14639           17437 NORMAL= 4.17

MAXIMUM   567.04      682043   DATE=28    TOP CONSERVATION POOL    554.00
MINIMUM   554.09      366938   DATE=18    TOP FLOOD POOL           582.00

                      INFLOW VOLUME=  1037553 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION