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                                   Cheney Lake
                          MONTHLY LAKE REPORT
                                 DEC 99


    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 1416.09   119758
 1  1416.07 1416.09   119758      0        0   0.140       0   0.00  0.00
 2  1416.07 1416.16   120304      0        0   0.140     400   0.00  0.00
 3  1416.18 1416.21   120692      0        0   0.100     275   0.32  0.08
 4  1416.25 1416.36   121860      0        0   0.130     300   0.47  0.07
 5  1416.41 1416.31   121472      0        0   0.070     250   0.87  1.20

 6  1416.31 1416.32   121548      0        0   0.070      75   0.00  0.05
 7  1416.34 1416.33   121626      0        0   0.070     100   0.00  0.05
 8  1416.34 1416.39   122094      0        0   0.070     300   0.00  0.01
 9  1416.42 1416.40   122172      0        0   0.050     100   0.29  0.03
10  1416.38 1416.36   121860      0        0   0.080      70   0.00  0.09

11  1416.38 1416.40   122172      0        0   0.070      40   0.00  0.00
12  1416.43 1416.42   122328      0        0   0.000      20   0.00  0.00
13  1416.42 1416.38   122016      0        0   0.080      50   0.00  0.00
14  1416.39 1416.58   123572      0        0   0.160     100   0.00  0.02
15  1416.46 1416.41   122250      0        0   0.070     100   0.00  0.03

16  1416.42 1416.42   122328      0        0   0.090     100   0.00  0.00
17  1416.44 1416.46   122638      0        0   0.050      80   0.00  0.00
18  1416.43 1416.42   122328      0        0   0.070      70   0.09  0.06
19  1416.43 1416.47   122716      0        0   0.070      60   0.00  0.05
20  1416.47 1416.43   122406      0        0   0.070      50   0.00  0.23

21  1416.43 1416.46   122638      0        0   0.070     175   0.00  0.00
22  1416.48 1416.45   122560      0        0   0.070     100   0.52  0.02
23  1416.46 1416.49   122872      0        0   0.070      80   0.00  0.00
24  1416.48 1416.46   122638      0        0   0.060      80   0.00  0.00
25  1416.47 1416.48   122794      0        0   0.030      80   0.00  0.00

26  1416.50 1416.50   122950      0        0   0.070      80   0.00  0.00
27  1416.49 1416.49   122872      0        0   0.120      50   0.00  0.00
28  1416.51 1416.51   123028      0        0   0.090      50   0.00  0.73
29  1416.53 1416.53   123184      0        0   0.140      50   0.00  0.01
30  1416.55 1416.56   123418      0        0   0.140      50   0.00  0.00
31  1416.55 1416.55   123340      0        0   0.090      50   0.00  0.02

TOTAL                             0        0   2.600    3385   2.56  2.75
AVERAGE  1416.41                  0        0             109 NORMAL= 0.87

MAXIMUM  1416.58      123572   DATE=28    TOP CONSERVATION POOL   1421.60
MINIMUM  1416.04      119370   DATE= 1    TOP FLOOD POOL          1429.00

                      INFLOW VOLUME=     6714 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION