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                                   Cheney Lake
                          MONTHLY LAKE REPORT
                                 APR 11


    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 1421.63   167359
 1  1421.63 1421.64   167454      0        0   0.130     120   0.00  0.01
 2  1421.65 1421.60   167074      0        0   0.180     120   0.00  0.00
 3  1421.62 1421.81   169070      0        0   0.430     120   0.00  0.00
 4  1421.75 1421.63   167359      0        0   0.460     120   0.00  0.00
 5  1421.63 1421.59   166979      0        0   0.300     120   0.00  0.00

 6  1421.62 1421.62   167264      0        0   0.390     120   0.00  0.00
 7  1421.63 1421.68   167835      0        0   0.360     120   0.00  0.00
 8  1421.63 1421.61   167169      0        0   0.120     120   0.00  0.01
 9  1421.63 1421.60   167074      0        0   0.190     120   0.00  0.00
10  1421.65 1421.72   168214      0        0   0.470     120   0.00  0.00

11  1421.67 1421.62   167264      0        0   0.540     120   0.00  0.00
12  1421.63 1421.60   167074      0        0   0.170     120   0.00  0.00
13  1421.61 1421.61   167169      0        0   0.340     120   0.00  0.00
14  1421.59 1421.61   167169      0        0   0.360     120   0.00  0.00
15  1421.67 1421.69   167929      0        0   0.410     120   0.03  0.02

16  1421.63 1421.57   166789      0        0   0.140     120   0.00  0.24
17  1421.57 1421.56   166695      0        0   0.260     120   0.00  0.00
18  1421.59 1421.57   166789      0        0   0.300     120   0.00  0.00
19  1421.62 1421.59   166979      0        0   0.200     120   0.00  0.00
20  1421.58 1421.54   166504      0        0   0.250     120   0.00  0.00

21  1421.54 1421.56   166695      0        0   0.150     120   0.00  0.00
22  1421.58 1421.56   166695      0        0   0.050     120   0.01  0.00
23  1421.59 1421.55   166600      0        0   0.120     100   0.00  0.00
24  1421.55 1421.55   166600      0        0   0.120     140   0.00  0.00
25  1421.59 1421.62   167264      0        0   0.340     120   0.21  0.14

26  1421.59 1421.58   166884      0        0   0.060     100   0.00  0.01
27  1421.64 1421.58   166884      0        0   0.070     100   0.12  0.15
28  1421.60 1421.58   166884      0        0   0.130      80   0.00  0.00
29  1421.54 1421.50   166124      0        0   0.300      80   0.00  0.00
30  1421.65 1421.56   166695      0        0   0.570      80   0.00  0.00

TOTAL                             0        0   7.910    3440   0.37  0.58
AVERAGE  1421.60                  0        0             115 NORMAL= 2.32

MAXIMUM  1421.91      170020   DATE=15    TOP CONSERVATION POOL   1421.60
MINIMUM  1421.40      165174   DATE=29    TOP FLOOD POOL          1429.00

WATER SUPPLY:  WITHDRAWN   2977 AC-FT

                      INFLOW VOLUME=     6823 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION