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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 APR 05


    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  639.81   610453
 1   639.93  639.75   608484      0     4911   0.210    4200   0.17  0.21
 2   639.70  639.57   602576      0     5417   0.230    2750   0.01  0.00
 3   639.48  639.35   595353      0     5406   0.250    2100   0.00  0.00
 4   639.26  639.13   588132      0     5391   0.300    2100   0.00  0.00
 5   638.99  639.12   587804      0     3505   0.300    3600   0.00  0.00

 6   639.19  639.40   596996      0        0   0.120    4700   1.50  0.21
 7   639.63  639.78   609469      0        0   0.040    6500   0.56  0.51
 8   639.83  639.73   607827      0     2469   0.110    1850   0.00  0.00
 9   639.66  639.55   601918      0     4058   0.160    1400   0.00  0.00
10   639.51  639.39   596667      0     4053   0.260    1500   0.00  0.00

11   639.39  639.21   590759      0     4047   0.100    1400   0.05  0.12
12   639.18  639.04   585177      0     4043   0.190    1400   0.00  0.00
13   639.01  638.85   579117      0     4036   0.190    1200   0.00  0.01
14   638.82  638.67   573421      0     4030   0.100    1100   0.00  0.00
15   638.60  638.55   569624      0     1663   0.260     600   0.00  0.00

16   638.52  638.47   567092      0     1116   0.270     300   0.00  0.00
17   638.43  638.33   562663      0     2230   0.280     200   0.00  0.00
18   638.25  638.19   558232      0     1079   0.240     200   0.00  0.00
19   638.24  638.24   559814      0      449   0.210     200   0.00  0.01
20   638.22  638.22   559180      0      224   0.120     120   0.00  0.00

21   638.17  638.28   561081      0      224   0.160     900   0.00  0.00
22   638.22  638.35   563294      0      449   0.180     400   0.06  0.04
23   638.27  638.22   559180      0      449   0.350     300   0.00  0.00
24   638.18  638.16   557282      0      449   0.320     250   0.00  0.00
25   638.13  638.27   560764      0      129   0.240     650   0.01  0.04

26   638.16  638.16   557282      0      290   0.060     200   0.35  0.20
27   638.17  638.16   557282      0      448   0.210     500   0.00  0.01
28   638.12  638.20   558549      0      448   0.280     300   0.13  0.19
29   638.14  638.07   554434      0      449   0.230     200   0.00  0.02
30   638.13  638.06   554118      0      448   0.050     150   0.00  0.05

TOTAL                             0    61909   6.020   41270   2.84  1.62
AVERAGE   638.75                  0     2064            1376 NORMAL= 3.63

MAXIMUM   639.93      614392   DATE= 1    TOP CONSERVATION POOL    638.00
MINIMUM   638.04      553484   DATE=30    TOP FLOOD POOL           661.00

WATER SUPPLY:  WITHDRAWN   4165 AC-FT

                      INFLOW VOLUME=    81858 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION