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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 APR 04


    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  643.78   749886
 1   643.65  643.55   741380      0    10080   0.190    4700   0.00  0.00
 2   643.60  643.12   725482      0    10068   0.240    4400   0.00  0.00
 3   643.03  642.84   715318      0    10040   0.260    4050   0.00  0.00
 4   642.69  642.43   700640      0    10017   0.290    3600   0.00  0.00
 5   642.31  642.04   686679      0     9989   0.250    3350   0.00  0.00

 6   641.89  641.65   673091      0     9962   0.150    3200   0.00  0.00
 7   641.51  641.23   658500      0     9935   0.170    2500   0.00  0.01
 8   641.19  640.76   642394      0     9908   0.140    2000   0.00  0.00
 9   640.60  640.28   626161      0     9871   0.280    1800   0.00  0.00
10   640.19  639.85   611765      0     9844   0.060    1500   0.33  0.42

11   639.65  639.26   592400      0     9805   0.040    1200   0.05  0.25
12   639.09  638.92   581333      0     6694   0.230    1000   0.00  0.00
13   638.76  638.56   569941      0     4830   0.260     800   0.00  0.00
14   638.48  638.23   559497      0     4815   0.160     800   0.00  0.00
15   638.05  638.08   554751      0     2066   0.290     800   0.00  0.00

16   638.17  638.09   555068      0      448   0.320     800   0.00  0.00
17   638.20  638.11   555700      0      448   0.310     800   0.00  0.00
18   638.16  638.15   556967      0      448   0.210     750   0.00  0.00
19   638.25  638.29   561396      0      449   0.170     750   0.00  0.00
20   638.14  638.47   567092      0      449   0.080    4500   0.02  0.51

21   638.46  638.82   578169      0      450   0.100    6400   1.15  0.51
22   638.91  639.46   598965      0      451   0.230   11100   1.49  0.56
23   639.59  639.96   615378      0      173   0.120    8550   0.06  0.15
24   640.10  641.18   656763      0        0   0.030   21000   0.18  1.72
25   641.80  643.04   722523      0        0   0.070   33500   0.01  0.01

26   643.60  644.28   768700      0     2121   0.250   25800   0.00  0.00
27   644.36  644.25   767555      0     5096   0.290    4900   0.00  0.00
28   644.24  644.30   769461      0     5093   0.320    6500   0.00  0.00
29   644.36  644.44   774802      0     5098   0.310    8000   0.07  0.03
30   644.47  644.64   782431      0     5103   0.110    9200   0.33  0.16

TOTAL                             0   153754   5.930  178250   3.69  4.33
AVERAGE   640.88                  0     5125            5942 NORMAL= 3.63

MAXIMUM   644.64      782431   DATE=30    TOP CONSERVATION POOL    638.00
MINIMUM   638.01      552536   DATE=15    TOP FLOOD POOL           661.00

WATER SUPPLY:  WITHDRAWN   4165 AC-FT

                      INFLOW VOLUME=   353554 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION