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                                   Cheney Lake
                          MONTHLY LAKE REPORT
                                 DEC 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 1421.72   168214
 1  1421.71 1421.75   168500      0        0   0.090     130   0.00  0.00
 2  1421.83 1421.76   168595      0        0   0.160     130   0.00  0.00
 3  1421.78 1421.74   168404      0        0   0.150     130   0.00  0.00
 4  1421.76 1421.72   168214      0        0   0.100     130   0.00  0.00
 5  1421.73 1421.73   168309      0        0   0.070     130   0.00  0.00

 6  1421.73 1421.81   169070      0        0   0.070     120   0.00  0.00
 7  1421.78 1421.78   168785      0        0   0.070     100   0.00  0.00
 8  1421.78 1421.98   170685      0        0   0.020     100   0.13  0.00
 9  1421.88 1421.79   168880      0        0   0.050      60   0.13  0.01
10  1421.79 1421.79   168880      0        0   0.050      60   0.00  0.00

11  1421.78 1421.78   168785      0        0   0.050      20   0.01  0.04
12  1421.80 1421.82   169164      0        0   0.080     220   0.02  0.02
13  1421.82 1421.84   169354      0        0   0.010     160   0.00  0.02
14  1421.95 1421.87   169640      0        0   0.040     100   0.00  0.00
15  1421.88 1421.86   169545      0        0   0.050      80   0.00  0.00

16  1421.84 1421.85   169449      0        0   0.040      30   0.00  0.00
17  1421.88 1421.91   170020      0        0   0.120     160   0.00  0.00
18  1421.91 1421.94   170304      0        0   0.090     160   0.00  0.00
19  1421.97 1421.94   170304      0        0   0.080      50   0.00  0.00
20  1421.96 1421.97   170590      0        0   0.010     160   0.00  0.00

21  1421.97 1421.99   170780      0        0   0.040     160   0.00  0.00
22  1422.01 1422.03   171171      0        0   0.060     160   0.00  0.00
23  1422.04 1422.10   171861      0        0   0.000     160   0.05  0.05
24  1422.22 1422.21   172945      0      133   0.010     160   0.00  0.03
25  1422.11 1422.05   171368      0      245   0.070     160   0.00  0.00

26  1422.00 1421.94   170304      0      245   0.090     160   0.00  0.00
27  1421.91 1421.87   169640      0      245   0.070     160   0.00  0.00
28  1421.87 1421.84   169354      0      245   0.050     160   0.00  0.00
29  1421.83 1421.81   169070      0      244   0.050     150   0.00  0.00
30  1421.79 1421.81   169070      0      244   0.010     300   0.00  0.00
31  1421.80 1421.76   168595      0      244   0.010      70   0.05  0.03

TOTAL                             0     1845   1.860    4030   0.39  0.20
AVERAGE  1421.87                  0       60             130 NORMAL= 0.87

MAXIMUM  1422.25      173340   DATE=24    TOP CONSERVATION POOL   1421.60
MINIMUM  1421.70      168024   DATE= 1    TOP FLOOD POOL          1429.00

WATER SUPPLY:  WITHDRAWN   2932 AC-FT

                      INFLOW VOLUME=     7993 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION