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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 MAY 05


    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  638.06   554118
 1   638.07  638.04   553484      0      448   0.260      90   0.00  0.00
 2   638.04  637.99   551917      0      235   0.160      50   0.00  0.00
 3   637.98  637.97   551312      0        0   0.150      40   0.00  0.00
 4   637.98  637.95   550709      0        0   0.210      30   0.00  0.00
 5   637.96  637.96   551011      0        0   0.200      20   0.00  0.00

 6   637.95  637.96   551011      0        0   0.090      10   0.00  0.00
 7   637.92  637.95   550709      0        0   0.290      10   0.00  0.00
 8   637.90  637.89   548897      0        0   0.220      10   0.00  0.03
 9   637.85  637.95   550709      0        0   0.130      10   0.02  0.36
10   637.93  637.92   549802      0        0   0.260      10   0.00  0.01

11   637.92  637.95   550709      0        0   0.260      10   0.00  0.00
12   637.89  637.89   548897      0        0   0.360     500   0.00  0.00
13   637.86  638.04   553484      0        0   0.240    2900   0.14  0.43
14   638.08  638.11   555700      0        0   0.090    1500   0.90  0.75
15   638.10  638.22   559180      0        0   0.340    2100   0.00  0.00

16   638.27  638.37   563928      0        0   0.310    2750   0.00  0.00
17   638.40  638.51   568359      0        0   0.310    2628   0.00  0.00
18   638.51  638.70   574372      0        0   0.350    3360   0.00  0.00
19   638.81  638.88   580068      0     1063   0.280    4250   0.82  0.26
20   638.94  639.03   584851      0     2689   0.250    5500   0.04  0.01

21   639.06  639.06   585834      0     2692   0.340    3600   0.00  0.00
22   639.12  639.06   585834      0     2692   0.350    3050   0.00  0.00
23   639.07  639.18   589773      0     2694   0.300    4950   0.83  0.83
24   639.20  639.24   591743      0     2698   0.240    3850   0.00  0.16
25   639.33  639.44   598308      0     2699   0.100    6350   0.00  0.76

26   639.57  639.83   611110      0     2708   0.290    9400   0.00  0.01
27   639.90  640.02   617367      0     2716   0.190    6100   0.02  0.09
28   639.99  640.05   618381      0     2718   0.130    3560   0.00  0.01
29   640.08  640.06   618719      0     2719   0.270    3250   0.00  0.00
30   640.08  640.07   619058      0     2719   0.290    3270   0.00  0.00
31   640.07  639.95   615049      0     3942   0.320    2250   0.00  0.00

TOTAL                             0    35432   7.580   75408   2.77  3.71
AVERAGE   638.69                  0     1143            2433 NORMAL= 5.09

MAXIMUM   640.08      619396   DATE=30    TOP CONSERVATION POOL    638.00
MINIMUM   637.80      546178   DATE=12    TOP FLOOD POOL           661.00

WATER SUPPLY:  WITHDRAWN   4344 AC-FT

                      INFLOW VOLUME=   149570 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION