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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 MAY 03


    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  639.09   586820
 1   639.08  639.35   595353      0     4941   0.340    9400   0.00  0.74
 2   639.53  639.78   609469      0     4962   0.160   12400   0.00  0.00
 3   639.80  639.83   611110      0     4972   0.260    6050   0.00  0.00
 4   639.75  639.81   610453      0     4969   0.200    4900   0.00  0.00
 5   639.74  639.74   608155      0     4969   0.200    4250   0.00  0.09

 6   639.69  639.68   606186      0     4965   0.360    4000   0.00  0.01
 7   639.62  639.53   601263      0     4961   0.280    2000   0.00  0.00
 8   639.42  639.24   591743      0     4950   0.290    1200   0.05  0.12
 9   639.20  639.00   583865      0     4939   0.090    1000   0.00  0.01
10   638.81  638.75   575954      0     4924   0.240     800   0.11  0.11

11   638.61  638.42   565510      0     4912   0.210     700   0.39  0.07
12   638.30  638.19   558232      0     3645   0.320     550   0.00  0.00
13   638.10  638.30   561712      0     1247   0.320    3100   0.00  0.00
14   638.52  638.93   581650      0      450   0.020   10750   0.65  1.01
15   638.96  638.94   581966      0     1854   0.190    2200   0.19  0.02

16   639.08  639.53   601263      0     2700   0.180   12600   1.56  0.99
17   639.89  640.79   643408      0     2718   0.110   24150   0.11  1.05
18   641.24  641.88   681080      0     2741   0.110   22100   0.00  0.00
19   641.97  642.14   690260      0     3713   0.280    8650   0.00  0.00
20   642.24  642.21   692766      0     5027   0.270    6600   1.57  0.68

21   642.20  642.17   691333      0     5026   0.220    4600   0.00  0.00
22   642.20  642.20   692408      0     5026   0.190    5900   0.00  0.00
23   642.18  642.15   690618      0     5026   0.280    4400   0.00  0.00
24   642.11  642.44   700999      0     5028   0.180   10450   0.13  0.01
25   642.75  643.02   721785      0     5047   0.120   15750   1.22  0.92

26   643.05  643.04   722523      0     5054   0.140    5800   0.00  0.00
27   643.04  643.01   721415      0     5054   0.310    4900   0.00  0.00
28   642.98  642.95   719256      0     5052   0.310    4400   0.00  0.00
29   642.95  642.89   717108      0     5051   0.300    4400   0.00  0.00
30   642.77  642.72   711021      0     5046   0.390    2500   0.00  0.00
31   642.83  642.51   703505      0     5042   0.390    1630   0.00  0.00

TOTAL                             0   134010   7.260  202130   5.98  5.83
AVERAGE   640.75                  0     4323            6520 NORMAL= 5.09

MAXIMUM   643.07      723633   DATE=26    TOP CONSERVATION POOL    638.00
MINIMUM   638.03      553169   DATE=13    TOP FLOOD POOL           661.00

WATER SUPPLY:  WITHDRAWN   4027 AC-FT

                      INFLOW VOLUME=   400919 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION