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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 MAY 98


    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  645.94   832959
 1   646.03  645.50   815735      0     8757   0.050    5700   0.00  0.01
 2   645.58  645.27   806732      0    15313   0.220    5450   0.00  0.01
 3   645.08  644.75   786626      0    15265   0.180    5300   0.00  0.01
 4   644.54  644.18   764884      0    15208   0.300    5200   0.00  0.00
 5   643.93  643.65   745079      0    15147   0.310    5400   0.05  0.00

 6   643.50  643.11   725112      0    15096   0.140    5250   0.18  0.06
 7   643.02  642.81   714244      0    12049   0.150    6850   0.25  0.18
 8   642.82  642.59   706369      0     8791   0.200    5200   0.00  0.11
 9   642.62  642.61   707084      0     7747   0.280    8200   0.00  0.01
10   642.60  642.54   704578      0     7746   0.050    6800   0.62  0.51

11   642.48  642.27   694914      0     7741   0.250    4100   0.00  0.06
12   642.16  642.16   690975      0     6046   0.310    3800   0.00  0.01
13   642.14  642.22   693122      0     2525   0.290    3800   0.00  0.00
14   642.24  642.33   697062      0     1125   0.290    3400   0.00  0.00
15   642.31  642.41   699924      0     1125   0.180    2950   0.00  0.00

16   642.42  642.45   701357      0     1145   0.320    2250   0.00  0.11
17   642.45  642.41   699924      0     1148   0.290    1200   0.00  0.00
18   642.38  642.41   699924      0     1148   0.250    1050   0.00  0.00
19   642.42  642.31   696345      0     1148   0.250     800   0.00  0.00
20   642.36  642.34   697420      0     1149   0.270     500   0.00  0.00

21   642.32  641.77   677259      0     7767   0.170     300   0.00  0.00
22   641.57  640.91   647466      0    14306   0.000     200   0.00  0.00
23   640.59  640.02   617367      0    15011   0.150     100   0.00  0.00
24   639.69  639.08   586492      0    14914   0.150     100   0.00  0.00
25   638.74  638.27   560764      0    14817   0.250     100   0.52  0.66

26   637.97  638.08   554751      0     6871   0.110    2500   0.88  0.10
27   638.14  638.19   558232      0       64   0.160    2050   0.12  0.20
28   638.20  638.19   558232      0       64   0.170    1500   0.00  0.00
29   638.19  638.22   559180      0       64   0.230     700   0.00  0.00
30   638.21  638.16   557282      0       57   0.250     300   0.00  0.00
31   638.15  638.27   560764      0       55   0.290     300   0.00  0.01

TOTAL                             0   219406   6.510   91350   2.62  2.05
AVERAGE   641.60                  0     7078            2947 NORMAL= 5.09

MAXIMUM   646.04      836906   DATE= 1    TOP CONSERVATION POOL    638.00
MINIMUM   637.88      548595   DATE=26    TOP FLOOD POOL           661.00

                      INFLOW VOLUME=   181190 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION