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                                Ft Cobb Lake, OK
                          MONTHLY LAKE REPORT
                                 MAY 09


    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 1342.79    76909
 1  1342.76 1342.77    76831      0      186   0.160     180   0.00  0.00
 2  1342.77 1342.80    76948      0      186   0.170     260   0.69  0.97
 3  1342.80 1342.76    76792      0      186   0.040     130   0.06  0.16
 4  1342.73 1342.72    76636      0      186   0.070     130   0.00  0.00
 5  1342.68 1343.12    78214      0       74   0.040     880   0.16  0.10

 6  1343.20 1343.22    78621      0      113   0.000     350   1.47  1.27
 7  1343.21 1343.20    78539      0      187   0.140     160   0.00  0.00
 8  1343.19 1343.16    78377      0      187   0.020     160   0.00  0.00
 9  1343.12 1343.06    77970      0      187   0.410      30   0.00  0.00
10  1343.01 1342.98    77648      0      187   0.240      30   0.00  0.00

11  1342.97 1343.01    77767      0      187   0.120     280   0.97  0.56
12  1342.99 1342.93    77454      0      187   0.040      90   0.29  0.27
13  1342.94 1343.08    78051      0      187   0.430     550   0.10  0.06
14  1343.19 1343.15    78336      0      187   0.430     360   1.52  0.62
15  1343.12 1343.12    78214      0      187   0.100     180   0.00  0.00

16  1343.14 1343.07    78010      0      187   0.350     140   0.48  0.49
17  1343.04 1342.98    77648      0      187   0.320      40   0.00  0.01
18  1342.96 1342.90    77337      0      187   0.200      40   0.00  0.00
19  1342.85 1342.81    76987      0      186   0.340      40   0.00  0.00
20  1342.77 1342.72    76636      0      186   0.360      40   0.00  0.00

21  1342.67 1342.63    76286      0      186   0.360      40   0.00  0.00
22  1342.59 1342.54    75935      0      186   0.280      40   0.00  0.00
23  1342.50 1342.53    75896      0       66   0.230      40   0.00  0.00
24  1342.52 1342.53    75896      0        0   0.200     170   0.09  0.17
25  1342.53 1342.58    76091      0        0   0.250     130   0.00  0.00

26  1342.62 1342.71    76597      0        0   0.170     300   0.44  0.86
27  1342.68 1342.69    76519      0        0   0.250     100   0.00  0.00
28  1342.70 1342.72    76636      0        0   0.200      80   0.00  0.00
29  1342.71 1342.73    76675      0        0   0.260      70   0.00  0.00
30  1342.73 1342.74    76714      0        0   0.340      60   0.00  0.00
31  1342.73 1342.74    76714      0        0   0.380      50   0.00  0.00

TOTAL                             0     3984   6.900    5150   6.27  5.54
AVERAGE  1342.86                  0      129             166 NORMAL= 4.81

MAXIMUM  1343.23       78661   DATE= 6    TOP CONSERVATION POOL   1342.00
MINIMUM  1342.50       75780   DATE=23    TOP FLOOD POOL          1354.80

WATER SUPPLY:  WITHDRAWN    871 AC-FT

                      INFLOW VOLUME=    10215 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION