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                                   Cheney Lake
                          MONTHLY LAKE REPORT
                                 JUL 07


    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 1422.46   175410
 1  1422.50 1422.52   176002      0        0   0.080     400   0.03  0.01
 2  1422.54 1422.58   176593      0        0   0.190     360   0.00  0.00
 3  1422.58 1422.62   176988      0        0   0.040     290   0.00  0.00
 4  1422.62 1422.67   177481      0        0   0.150     360   0.00  0.00
 5  1422.72 1422.74   178171      0        0   0.210     490   1.18  0.65

 6  1422.75 1422.75   178269      0        0   0.320     210   0.00  0.00
 7  1422.75 1422.75   178269      0        0   0.360     180   0.00  0.00
 8  1422.75 1422.74   178171      0        0   0.410     130   0.00  0.00
 9  1422.78 1422.97   180438      0        0   0.400    1350   0.00  0.20
10  1422.98 1423.00   180734      0        0   0.500     330   1.83  0.22

11  1423.00 1422.98   180537      0        0   0.400     190   0.00  0.00
12  1422.89 1423.02   180939      0        0   0.270     170   0.29  0.42
13  1423.02 1423.02   180939      0        0   0.130     120   0.05  0.50
14  1423.01 1423.02   180939      0        0   0.120     120   0.00  0.01
15  1423.01 1423.01   180836      0        0   0.330     120   0.00  0.00

16  1423.01 1423.01   180836      0        0   0.420     120   0.00  0.01
17  1423.01 1422.99   180635      0        0   0.370     100   0.00  0.00
18  1422.97 1422.95   180241      0        0   0.470     100   0.00  0.00
19  1422.96 1422.93   180044      0        0   0.510      90   0.00  0.00
20  1422.93 1422.91   179847      0        0   0.280      90   0.00  0.02

21  1422.91 1422.90   179748      0        0   0.340      90   0.00  0.00
22  1422.89 1422.88   179551      0        0   0.380      90   0.00  0.00
23  1422.88 1422.86   179354      0        0   0.330      90   0.00  0.00
24  1422.84 1422.84   179156      0        0   0.280      80   0.00  0.71
25  1422.82 1422.81   178861      0        0   0.340      80   0.00  0.00

26  1422.81 1422.79   178664      0        0   0.310      80   0.00  0.00
27  1422.78 1422.76   178368      0        0   0.430     100   0.00  0.00
28  1422.77 1422.73   178072      0        0   0.460      90   0.51  0.00
29  1422.73 1422.72   177973      0        0   0.310      90   0.00  0.00
30  1422.71 1422.74   178171      0        0   0.290      90   0.00  0.02
31  1422.73 1422.72   177973      0        0   0.200      90   0.01  0.11

TOTAL                             0        0   9.630    6290   3.90  2.88
AVERAGE  1422.84                  0        0             203 NORMAL= 2.93

MAXIMUM  1423.04      181143   DATE=13    TOP CONSERVATION POOL   1421.60
MINIMUM  1422.46      175410   DATE= 1    TOP FLOOD POOL          1429.00

WATER SUPPLY:  WITHDRAWN   4158 AC-FT

                      INFLOW VOLUME=    12476 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION