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                                   Cheney Lake
                          MONTHLY LAKE REPORT
                                 DEC 98


    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 1422.03   171171
 1  1422.03 1422.03   171171      0        0   0.060     100   0.00  0.00
 2  1422.05 1422.10   171861      0        0   0.110     100   0.02  0.00
 3  1422.10 1422.13   172157      0        0   0.080     200   0.01  0.00
 4  1422.12 1422.13   172157      0        0   0.040     200   0.08  0.09
 5  1422.17 1422.19   172748      0        0   0.100     550   0.00  0.00

 6  1422.23 1422.27   173537      0        0   0.080     500   0.01  0.00
 7  1422.25 1422.19   172748      0      374   0.110     100   0.63  0.14
 8  1422.18 1422.06   171467      0      737   0.030      50   0.00  0.00
 9  1422.02 1421.95   170399      0      736   0.030     250   0.00  0.00
10  1421.92 1421.85   169449      0      577   0.050     200   0.00  0.00

11  1421.84 1421.80   168975      0      331   0.040     200   0.00  0.00
12  1421.80 1421.78   168785      0      244   0.050     200   0.00  0.00
13  1421.80 1421.77   168690      0      244   0.030     200   0.00  0.00
14  1421.74 1421.71   168119      0      244   0.040     150   0.00  0.00
15  1421.72 1421.71   168119      0      244   0.040     150   0.00  0.00

16  1421.70 1421.67   167740      0      244   0.070     150   0.00  0.00
17  1421.66 1421.60   167074      0      244   0.090     150   0.00  0.00
18  1421.61 1421.66   167645      0       84   0.100     150   0.00  0.00
19  1421.67 1421.62   167264      0        0   0.070     100   0.00  0.00
20  1421.63 1421.68   167835      0        0   0.050     100   0.00  0.00

21  1421.68 1421.64   167454      0        0   0.050     100   0.01  0.00
22  1421.64 1421.59   166979      0        0   0.050     100   0.00  0.00
23  1421.63 1421.62   167264      0        0   0.030     100   0.00  0.00
24  1421.64 1421.63   167359      0        0   0.050     100   0.00  0.00
25  1421.62 1421.64   167454      0        0   0.050     100   0.00  0.00

26  1421.65 1421.64   167454      0        0   0.050     100   0.00  0.00
27  1421.66 1421.67   167740      0        0   0.050     100   0.00  0.00
28  1421.66 1421.70   168024      0        0   0.050      50   0.00  0.00
29  1421.71 1421.69   167929      0        0   0.050      50   0.00  0.00
30  1421.68 1421.79   168880      0        0   0.050      50   0.00  0.00
31  1421.75 1421.71   168119      0        0   0.050      50   0.00  0.00

TOTAL                             0     4303   1.800    4700   0.76  0.23
AVERAGE  1421.81                  0      139             152 NORMAL= 0.87

MAXIMUM  1422.30      173833   DATE= 6    TOP CONSERVATION POOL   1421.60
MINIMUM  1421.59      166979   DATE=22    TOP FLOOD POOL          1429.00

                      INFLOW VOLUME=     9322 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION