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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 APR 11


    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  638.08   554751
 1   638.09  638.11   555700      0      448   0.040    1200   0.23  0.20
 2   638.12  638.10   555383      0      448   0.160    1200   0.00  0.02
 3   638.12  638.20   558549      0      448   0.290    1200   0.00  0.00
 4   638.25  638.14   556650      0      449   0.320    1000   0.01  0.30
 5   638.12  638.12   556016      0      448   0.220    1000   0.00  0.00

 6   637.96  638.22   559180      0      448   0.350    1000   0.00  0.00
 7   638.22  638.17   557598      0      449   0.330    1000   0.00  0.00
 8   638.26  638.32   562346      0      449   0.130    2000   0.00  0.00
 9   638.31  638.39   564561      0      449   0.220    2000   0.12  0.25
10   638.31  638.44   566143      0      449   0.330    1500   0.00  0.00

11   638.46  638.26   560447      0     2580   0.220    1000   0.01  0.00
12   638.18  638.06   554118      0     3371   0.300    1000   0.00  0.00
13   638.01  637.98   551614      0     1223   0.260    1000   0.00  0.00
14   637.99  638.23   559497      0      127   0.340    4000   0.00  0.00
15   638.08  638.25   560131      0        0   0.190    1000   1.78  0.59

16   638.32  638.33   562663      0        0   0.050    1500   0.09  0.14
17   638.31  638.38   564245      0        0   0.250    1200   0.00  0.00
18   638.38  638.35   563294      0     1316   0.360    1000   0.00  0.00
19   638.15  638.33   562663      0     2228   0.200    1000   0.00  0.00
20   638.25  638.11   555700      0     2227   0.230    1000   0.00  0.00

21   638.02  638.06   554118      0     1050   0.250    1000   0.00  0.00
22   637.96  638.15   556967      0      224   0.050    2000   0.27  0.30
23   638.26  638.26   560447      0      224   0.290    2100   0.37  0.10
24   638.24  638.41   565193      0      224   0.160    2834   0.00  0.07
25   638.65  639.88   612751      0      225   0.000   24000   1.24  1.03

26   640.66  641.82   678996      0      228   0.010   30000   0.24  0.69
27   641.92  641.97   684205      0      230   0.160    3000   0.11  0.11
28   641.96  642.06   687396      0      230   0.080    2500   0.00  0.02
29   642.07  641.86   680384      0     2738   0.280    1500   0.00  0.00
30   641.70  641.74   676216      0     4111   0.440    1000   0.00  0.00

TOTAL                             0    27043   6.510   96734   4.47  3.82
AVERAGE   638.89                  0      901            3224 NORMAL= 3.63

MAXIMUM   642.07      687754   DATE=29    TOP CONSERVATION POOL    638.00
MINIMUM   637.80      546178   DATE=14    TOP FLOOD POOL           661.00

WATER SUPPLY:  WITHDRAWN   4165 AC-FT

                      INFLOW VOLUME=   191869 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION