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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 MAY 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  650.82  1035978
 1   650.79  650.76  1033361      0     5066   0.290    4200   0.00  0.00
 2   650.73  650.67  1029435      0     5063   0.300    4200   0.00  0.00
 3   650.63  650.60  1026382      0     5061   0.170    4200   0.02  0.00
 4   650.75  652.91  1130889      0     1494   0.110   53100   1.42  0.81
 5   653.56  654.43  1203696      0        0   0.130   37100   4.43  1.36

 6   654.70  655.28  1245647      0        0   0.230   21650   0.16  0.02
 7   655.54  655.80  1271759      0        0   0.290   13850   0.00  0.01
 8   655.87  655.70  1266739      0     6000   0.400    4000   0.00  0.00
 9   655.62  655.31  1247152      0    12869   0.300    4000   0.00  0.00
10   655.10  654.93  1228159      0    11688   0.290    4000   0.07  0.01

11   654.83  654.77  1220332      0     9904   0.100    4000   0.00  0.00
12   654.73  655.04  1233592      0     6427   0.130   13500   1.38  1.06
13   655.27  655.38  1250668      0     9595   0.190   18700   0.00  0.01
14   655.26  654.81  1222288      0    18156   0.290    4285   0.00  0.00
15   654.58  654.10  1187549      0    19914   0.250    2670   0.00  0.00

16   653.86  653.38  1153144      0    19930   0.140    2800   0.00  0.01
17   653.48  653.67  1166948      0    13821   0.110   20950   0.96  0.94
18   653.74  653.80  1173137      0    10017   0.060   13550   0.80  0.44
19   653.82  653.63  1165045      0    12903   0.270    9300   0.00  0.00
20   653.48  653.04  1136958      0    18458   0.260    4600   0.00  0.00

21   653.02  653.24  1146479      0    13474   0.190   18450   0.90  0.71
22   653.28  652.95  1132742      0    15302   0.090    8600   0.01  0.01
23   652.86  652.78  1124875      0    20080   0.100   16500   1.71  0.69
24   652.66  652.35  1104971      0    20043   0.250   10400   0.00  0.00
25   652.15  651.76  1077987      0    19977   0.230    6500   0.00  0.05

26   651.57  651.22  1053714      0    19906   0.050    8050   0.06  0.02
27   651.06  650.73  1032052      0    19840   0.230    9300   0.00  0.00
28   650.55  650.23  1010247      0    19776   0.240    9300   0.00  0.00
29   650.06  649.75   989589      0    19713   0.190    9300   0.00  0.00
30   649.59  649.25   968330      0    19653   0.150    9300   0.00  0.00
31   649.26  649.79   991289      0     9117   0.160   21050   1.37  1.04

TOTAL                             0   383247   6.190  371405  13.29  7.19
AVERAGE   652.97                  0    12363           11981 NORMAL= 5.09

MAXIMUM   655.87     1275275   DATE= 8    TOP CONSERVATION POOL    638.00
MINIMUM   649.25      968330   DATE=30    TOP FLOOD POOL           661.00

                      INFLOW VOLUME=   736671 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION