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                                 Ft Gibson Lake, OK
                          MONTHLY LAKE REPORT
                                 APR 99


    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  553.99   365013
 1   553.86  553.80   361460  11064    11064   0.160    9400   0.00  0.00
 2   553.78  553.83   362021  10976    10976   0.130   11300   0.00  0.00
 3   553.91  554.21   369253   9855     9855   0.080   13500   0.42  0.18
 4   554.15  554.15   368095  10904    10904   0.020   10500   0.69  0.72
 5   554.16  554.48   374464  10904    10904   0.300   14200   0.01  0.01

 6   554.21  554.25   370025  10876    10876   0.260    8800   0.18  0.10
 7   554.06  553.96   364452  10904    10904   0.290    8200   0.00  0.00
 8   553.91  553.80   361460   9649     9649   0.220    8250   0.00  0.00
 9   553.97  553.71   359777   9102     9102   0.170    8300   0.00  0.00
10   553.80  553.90   363330    494     8834   0.100   10800   0.00  0.00

11   553.79  553.82   361834   9063     9063   0.360    8500   0.00  0.00
12   553.83  553.65   358655   9508     9508   0.270    8100   0.00  0.00
13   553.58  553.68   359216   7146     7146   0.290    7500   0.00  0.00
14   553.75  554.17   368481   6983     6983   0.150   11600   0.68  0.46
15   554.35  554.89   382377  11164    12589   0.030   20000   0.22  0.50

16   555.26  555.66   397699  11588    21430   0.240   30000   0.00  0.00
17   555.92  556.29   410561  11718    25274   0.130   32000   0.00  0.00
18   556.49  556.95   424355  11718    25729   0.300   33000   0.00  0.00
19   557.24  557.63   439008  11494    26036   0.300   33500   0.00  0.00
20   557.87  557.88   444408  11494    27881   0.330   30800   0.00  0.00

21   557.39  556.77   420593  11652    28372   0.400   16500   0.00  0.00
22   556.34  556.33   411397  11858    28480   0.280   24000   0.01  0.11
23   556.55  556.51   415159  11840    27044   0.170   29000   0.99  0.87
24   556.54  556.83   421847  11608    24034   0.060   27000   0.01  0.01
25   557.02  559.11   471952  11410    19626   0.030   45000   0.47  0.80

26   560.39  564.49   607922   3332     3352   0.000   72000   1.42  2.12
27   566.59  570.17   783381   2504     2505   0.050   91000   0.93  1.58
28   571.80  574.15   929816   9752    19441   0.280   93000   0.00  0.00
29   575.32  576.79  1039290   9636    31430   0.160   87000   0.00  0.00
30   577.58  577.51  1070944   9544    40150   0.180   56000   0.00  0.00

TOTAL                        289740   499141   5.740  858750   6.03  7.46
AVERAGE   558.11               9658    16638           28625 NORMAL= 4.17

MAXIMUM   577.72     1080267   DATE=30    TOP CONSERVATION POOL    554.00
MINIMUM   553.47      355288   DATE=13    TOP FLOOD POOL           582.00

                      INFLOW VOLUME=  1703305 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION