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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 APR 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  648.87   952287
 1   648.74  648.60   941041      0    14419   0.170    9150   0.00  0.11
 2   648.53  648.30   928547      0    14413   0.280    8550   0.00  0.00
 3   648.24  648.02   916887      0    14414   0.300    8200   0.21  0.17
 4   647.92  647.65   901780      0    14125   0.080    7200   0.00  0.00
 5   647.52  647.24   885057      0    14067   0.050    6600   0.00  0.00

 6   647.13  646.79   866876      0    14065   0.220    6200   0.00  0.00
 7   646.66  646.48   854489      0    14069   0.250    6550   0.12  0.24
 8   646.31  646.08   838506      0    14071   0.230    6250   0.02  0.01
 9   645.96  645.62   820432      0    14065   0.140    5200   0.00  0.00
10   645.49  645.14   801643      0    14056   0.163    4950   0.00  0.00

11   644.94  644.54   778615      0    14061   0.250    3500   0.00  0.00
12   644.34  643.86   752842      0    14051   0.280    2500   0.00  0.00
13   643.62  643.29   731767      0    14064   0.310    2250   0.00  0.01
14   643.08  642.47   702072      0    14309   0.410    1500   0.00  0.00
15   642.35  642.26   694556      0     7652   0.305    1200   0.00  0.12

16   642.19  642.22   693122      0      835   0.180    1200   0.00  0.01
17   642.21  642.19   692050      0      835   0.140    1200   0.00  0.00
18   642.16  642.15   690618      0      805   0.230    1000   0.00  0.00
19   642.14  642.14   690260      0      799   0.150    1000   0.00  0.00
20   642.17  642.11   689185      0      799   0.210    1000   0.00  0.00

21   642.18  642.15   690618      0      799   0.080     800   0.00  0.00
22   642.11  642.15   690618      0      799   0.245     800   0.00  0.00
23   642.15  642.18   691691      0      591   0.250     800   0.00  0.00
24   642.18  642.15   690618      0      460   0.187     600   0.00  0.00
25   641.99  642.18   691691      0      460   0.320     600   0.00  0.00

26   642.25  642.51   703505      0      461   0.360    7400   0.00  0.15
27   642.74  643.78   749886      0      463   0.030   23900   2.09  1.43
28   644.32  645.09   799686      0      468   0.020   25700   0.17  0.70
29   645.34  645.66   821997      0      470   0.030   11850   0.00  0.02
30   645.77  645.94   832959      0      471   0.040    6100   0.00  0.00

TOTAL                             0   215416   5.910  163750   2.61  2.97
AVERAGE   644.36                  0     7181            5458 NORMAL= 3.63

MAXIMUM   648.87      952287   DATE= 1    TOP CONSERVATION POOL    638.00
MINIMUM   641.96      683859   DATE=25    TOP FLOOD POOL           661.00

                      INFLOW VOLUME=   324793 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION