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                               Ft Gibson Lake, OK
                          MONTHLY LAKE REPORT
                                 MAY 03


    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  554.54   375622
 1   554.72  554.70   378710   5517    10900   0.370   12550   0.07  0.04
 2   554.40  554.55   375815   6749     6749   0.210    5400   0.28  0.24
 3   554.59  554.49   374657   8337    14833   0.190   14300   0.00  0.00
 4   554.36  554.33   371569   8369    14835   0.180   13500   0.00  0.04
 5   554.06  554.34   371763   8401    13784   0.140   14000   0.00  0.05

 6   554.27  554.19   368867   8249    12733   0.290   11400   0.00  0.00
 7   554.00  554.15   368095   8245    10905   0.230   10600   0.00  0.11
 8   554.12  554.34   371763   8188     9024   0.280   11000   0.06  0.04
 9   554.47  554.79   380447   8179     8179   0.170   12000   0.00  0.00
10   554.76  555.11   386700   8012     8012   0.190   11000   0.00  0.06

11   555.00  554.75   379675   7868     7868   0.110    4500   0.00  0.06
12   554.51  554.13   367709   6747     6747   0.260     100   0.00  0.00
13   554.07  554.01   365393   5340     5340   0.330    4000   0.00  0.00
14   554.00  555.12   386900   5107     5107   0.080   16000   0.00  0.75
15   554.88  554.78   380255   8184     9289   0.190    6000   0.00  0.14

16   554.66  555.99   404300   9922     9922   0.220   22000   0.00  1.15
17   556.70  556.65   418086  10874    11946   0.100   19000   0.00  1.31
18   556.47  556.77   420593  10883    14455   0.120   16000   0.00  0.01
19   556.50  557.07   426912  10985    18020   0.280   22000   0.00  0.00
20   556.52  557.19   429504  11108    20370   0.320   21000   0.00  0.81

21   556.65  557.23   430368  11120    20889   0.140   21000   0.00  0.00
22   556.67  557.13   428208  11179    21575   0.080   20000   0.00  0.00
23   556.62  557.06   426696  11157    21550   0.170   20900   0.00  0.00
24   556.38  555.97   403899  11344    21353   0.200   10000   0.00  0.01
25   555.38  554.74   379482  11467    18294   0.080    6000   0.00  0.56

26   554.34  554.28   370605  11258    12698   0.080    8000   0.00  0.00
27   553.98  554.55   375815   9518     9518   0.050   12000   0.00  0.00
28   554.25  553.80   361460   8945     8945   0.290    2000   0.00  0.00
29   553.55  553.60   357720   7371     7371   0.280    6200   0.00  0.00
30   553.58  554.73   379289      0        0   0.390   11000   0.00  0.00
31   554.82  554.73   379289   1395     1395   0.360    1500   0.00  0.00

TOTAL                        260018   362606   6.380  364950   0.41  5.38
AVERAGE   555.14               8388    11697           11773 NORMAL= 5.37

MAXIMUM   557.23      430368   DATE=21    TOP CONSERVATION POOL    554.00
MINIMUM   553.19      350053   DATE=29    TOP FLOOD POOL           582.00

                      INFLOW VOLUME=   723867 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION