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                                   Cheney Lake
                          MONTHLY LAKE REPORT
                                 APR 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 1420.39   155791
 1  1420.54 1420.81   159635      0        0   0.210    2050   0.03  0.13
 2  1420.90 1421.03   161658      0        0   0.200    1150   0.00  0.00
 3  1421.18 1421.20   163273      0        0   0.280     950   0.00  0.00
 4  1421.23 1421.31   164319      0        0   0.340     600   0.00  0.00
 5  1421.32 1421.40   165174      0        0   0.160     500   0.00  0.00

 6  1421.42 1421.45   165648      0        0   0.080     330   0.00  0.09
 7  1421.46 1421.46   165744      0        0   0.170     280   0.00  0.05
 8  1421.46 1421.47   165839      0        0   0.200     220   0.00  0.00
 9  1421.47 1421.49   166029      0        0   0.130     180   0.00  0.00
10  1421.49 1421.60   167074      0        0   0.170     160   0.00  0.00

11  1421.61 1421.57   166789      0        0   0.000     150   0.20  0.14
12  1421.61 1421.59   166979      0        0   0.230     150   0.04  0.01
13  1421.66 1421.88   169735      0        0   0.100    1450   0.24  0.25
14  1422.04 1422.31   173932      0        0   0.000    2200   1.45  1.01
15  1422.44 1422.67   177481      0        0   0.120    1900   0.00  0.00

16  1422.75 1422.87   179452      0        0   0.220    1100   0.00  0.00
17  1422.90 1422.98   180537      0        0   0.260     650   0.00  0.00
18  1423.02 1422.98   180537      0      369   0.130     500   0.28  0.09
19  1422.96 1422.88   179551      0      905   0.220     450   0.00  0.00
20  1422.80 1422.70   177776      0      985   0.150     400   0.00  0.00

21  1422.65 1422.57   176494      0      983   0.360     400   0.00  0.00
22  1422.49 1422.42   175016      0      982   0.350     380   0.00  0.02
23  1422.36 1422.24   173241      0      981   0.370     350   0.00  0.00
24  1422.17 1422.09   171762      0      979   0.170     320   0.00  0.00
25  1422.06 1421.99   170780      0      978   0.150     290   0.02  0.00

26  1421.95 1421.84   169354      0      581   0.070     240   0.11  0.02
27  1421.83 1421.84   169354      0      168   0.150     190   0.00  0.00
28  1421.84 1421.83   169259      0      129   0.170     160   0.00  0.00
29  1421.82 1421.81   169070      0      129   0.280     130   0.00  0.00
30  1421.81 1421.81   169070      0      129   0.340     250   0.00  0.00

TOTAL                             0     8297   5.780   18080   2.37  1.81
AVERAGE  1421.94                  0      277             603 NORMAL= 2.32

MAXIMUM  1423.03      181041   DATE=18    TOP CONSERVATION POOL   1421.60
MINIMUM  1420.39      155791   DATE= 1    TOP FLOOD POOL          1429.00

WATER SUPPLY:  WITHDRAWN   2849 AC-FT

                      INFLOW VOLUME=    35861 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION