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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 MAY 13


    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  639.91   607700
 1   639.86  639.99   610295      0     3584   0.360    5285   0.00  0.00
 2   639.82  639.81   604459      0     4753   0.310    1960   0.00  0.06
 3   639.58  639.39   590843      0     6688   0.030     195   0.06  0.33
 4   639.29  639.13   582414      0     6674   0.290    2605   0.10  0.14
 5   639.02  638.84   573561      0     6660   0.070    2375   0.11  0.09

 6   638.74  638.65   568053      0     4593   0.070    2015   0.00  0.00
 7   638.65  638.59   566314      0     2673   0.090    2120   0.00  0.00
 8   638.65  638.50   563704      0     2672   0.240    1675   0.00  0.11
 9   638.49  638.50   563704      0     2671   0.230    2870   0.45  0.62
10   638.59  638.60   566602      0     2673   0.090    4425   0.00  0.01

11   638.63  638.62   567183      0     2674   0.200    3360   0.00  0.00
12   638.62  638.62   567183      0     2673   0.320    3015   0.00  0.00
13   638.53  638.56   565443      0     2672   0.260    2230   0.00  0.04
14   638.56  638.44   561965      0     2671   0.370    1380   0.00  0.00
15   638.48  638.56   565443      0     2670   0.400    2900   0.00  0.00

16   638.42  638.34   559066      0     2669   0.090    1395   0.20  0.03
17   638.30  638.24   556166      0     2263   0.120    1125   0.00  0.01
18   638.21  638.14   553268      0     1785   0.240     605   0.00  0.00
19   638.09  638.20   555007      0     1784   0.190    2930   0.02  0.22
20   638.06  638.47   562833      0      650   0.180    4775   0.00  1.04

21   639.10  640.09   613371      0     1591   0.070   27210   1.01  0.76
22   640.45  640.78   634460      0     4489   0.020   15504   0.10  0.01
23   640.96  640.93   639043      0     4501   0.290    6915   0.00  0.00
24   640.97  640.96   639961      0     4502   0.110    5360   0.00  0.00
25   640.94  640.87   637210      0     4501   0.300    3530   0.00  0.00

26   640.79  640.66   630790      0     4496   0.320    1635   0.00  0.00
27   640.48  640.38   622234      0     5561   0.280    1680   0.00  0.00
28   640.21  640.03   611537      0     6715   0.350    1655   0.00  0.01
29   639.85  639.79   603810      0     6699   0.240    3050   0.00  0.00
30   639.76  641.91   670531      0     2341   0.140   36150   1.33  1.71
31   642.81  644.71   766857      0        0   0.060   48866   0.54  1.15

TOTAL                             0   111550   6.330  200795   3.92  6.34
AVERAGE   639.53                  0     3598            6477 NORMAL= 5.09

MAXIMUM   644.71      766857   DATE=31    TOP CONSERVATION POOL    638.00
MINIMUM   637.99      548926   DATE=19    TOP FLOOD POOL           661.00

WATER SUPPLY:  WITHDRAWN   7141 AC-FT

                      INFLOW VOLUME=   398271 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION