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                                   Cheney Lake
                          MONTHLY LAKE REPORT
                                 JUL 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 1421.75   168500
 1  1421.74 1421.68   167835      0      244   0.400     100   0.00  0.02
 2  1421.67 1421.62   167264      0      158   0.360      50   0.02  0.00
 3  1421.59 1421.58   166884      0        0   0.390      40   0.00  0.00
 4  1421.62 1421.62   167264      0        0   0.530     250   0.38  0.44
 5  1421.61 1421.60   167074      0        0   0.420     120   0.00  0.00

 6  1421.59 1421.60   167074      0        0   0.210     110   0.00  0.00
 7  1421.57 1421.56   166695      0        0   0.270     100   0.00  0.00
 8  1421.55 1421.55   166600      0        0   0.250      90   0.04  0.11
 9  1421.51 1421.50   166124      0        0   0.360      90   0.00  0.00
10  1421.52 1421.50   166124      0        0   0.490      90   0.00  0.00

11  1421.51 1421.49   166029      0        0   0.410      80   0.00  0.00
12  1421.47 1421.48   165934      0        0   0.360      70   0.00  0.00
13  1421.45 1421.43   165459      0        0   0.430      70   0.00  0.00
14  1421.39 1421.34   164603      0        0   0.300      70   0.00  0.00
15  1421.46 1421.42   165364      0        0   0.560     150   0.09  0.08

16  1421.42 1421.43   165459      0        0   0.180      70   0.20  0.25
17  1421.42 1421.42   165364      0        0   0.380      70   0.01  0.00
18  1421.38 1421.38   164984      0        0   0.170      70   0.05  0.05
19  1421.37 1421.34   164603      0        0   0.290      70   0.00  0.00
20  1421.36 1421.33   164508      0        0   0.380     150   0.00  0.01

21  1421.39 1421.38   164984      0        0   0.430     300   1.12  0.13
22  1421.39 1421.35   164698      0        0   0.280      70   0.00  0.00
23  1421.34 1421.32   164413      0        0   0.330      60   0.05  0.00
24  1421.31 1421.29   164129      0        0   0.410      40   0.00  0.00
25  1421.28 1421.29   164129      0        0   0.360      30   0.00  0.00

26  1421.29 1421.28   164034      0        0   0.040      60   0.16  0.17
27  1421.28 1421.26   163844      0        0   0.320      10   0.00  0.00
28  1421.26 1421.25   163749      0        0   0.250      10   0.00  0.09
29  1421.25 1421.23   163558      0        0   0.120      10   0.00  0.01
30  1421.26 1421.20   163273      0        0   0.190      20   0.11  0.10
31  1421.20 1421.13   162608      0        0   0.300      10   0.00  0.00

TOTAL                             0      402   10.170    2530   2.23  1.46
AVERAGE  1421.41                  0       13              82 NORMAL= 2.93

MAXIMUM  1421.75      168500   DATE= 1    TOP CONSERVATION POOL   1421.60
MINIMUM  1421.13      162608   DATE=31    TOP FLOOD POOL          1429.00

WATER SUPPLY:  WITHDRAWN   4466 AC-FT

                      INFLOW VOLUME=     5018 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION