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                                  Foss 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 1642.30   179970
 1  1642.31 1642.32   180108      0      119   0.400     280   0.55  0.09
 2  1642.32 1642.34   180246      0      119   0.430     190   0.08  0.34
 3  1642.34 1642.34   180246      0      119   0.020     160   0.40  0.00
 4  1642.33 1642.30   179970      0      187   0.180      60   0.00  0.01
 5  1642.29 1642.31   180039      0      159   0.060     210   0.02  0.05

 6  1642.31 1642.31   180039      0      193   0.030     250   0.91  0.23
 7  1642.31 1642.29   179901      0      227   0.270     190   0.00  0.00
 8  1642.27 1642.24   179556      0      227   0.130     160   0.00  0.00
 9  1642.22 1642.15   178935      0      227   0.520     100   0.00  0.00
10  1642.12 1642.07   178383      0      174   0.240      50   0.00  0.00

11  1642.06 1642.04   178176      0      108   0.270      30   0.44  0.32
12  1642.04 1642.02   178038      0      108   0.120      30   0.10  0.04
13  1642.01 1642.00   177900      0      108   0.260      30   0.01  0.03
14  1641.99 1641.96   177633      0      118   0.360      20   0.00  0.00
15  1641.95 1641.93   177433      0      118   0.170      10   0.00  0.00

16  1641.94 1641.98   177766      0      118   0.210     300   0.70  0.92
17  1641.99 1641.99   177833      0      118   0.250     230   0.00  0.07
18  1641.99 1641.99   177833      0       10   0.360      70   0.00  0.00
19  1641.99 1642.00   177900      0       10   0.260      70   0.00  0.00
20  1642.00 1642.00   177900      0       10   0.440      70   0.00  0.00

21  1642.00 1642.01   177969      0       10   0.240      70   0.00  0.00
22  1642.01 1642.02   178038      0       10   0.210      70   0.00  0.00
23  1642.02 1642.04   178176      0       10   0.160      70   0.00  0.05
24  1642.05 1642.06   178314      0       10   0.270      70   0.00  0.17
25  1642.07 1642.11   178659      0       10   0.360     160   0.02  0.13

26  1642.16 1642.26   179694      0       10   0.310     930   1.49  0.78
27  1642.29 1642.34   180246      0       83   0.350     400   0.00  0.00
28  1642.34 1642.35   180315      0      166   0.210     280   0.00  0.00
29  1642.33 1642.30   179970      0      227   0.360     130   0.00  0.00
30  1642.28 1642.22   179418      0      227   0.400      20   0.00  0.00
31  1642.20 1642.13   178797      0      227   0.350      10   0.00  0.00

TOTAL                             0     3571   8.200    4720   4.72  3.23
AVERAGE  1642.14                  0      115             152 NORMAL= 3.98

MAXIMUM  1642.35      180315   DATE=28    TOP CONSERVATION POOL   1642.00
MINIMUM  1641.93      177433   DATE=16    TOP FLOOD POOL          1662.20

WATER SUPPLY:  WITHDRAWN    180 AC-FT

                      INFLOW VOLUME=     9362 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION