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                                   Cheney Lake
                          MONTHLY LAKE REPORT
                                 SEP 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 1420.79   159452
 1  1420.79 1420.74   158994      0        0   0.480       0   0.00  0.00
 2  1420.75 1420.71   158719      0        0   0.570       0   0.00  0.00
 3  1420.71 1420.67   158354      0        0   0.430       0   0.00  0.00
 4  1420.65 1420.65   158170      0        0   0.350       0   0.00  0.11
 5  1420.65 1420.65   158170      0        0   0.460       0   0.69  0.15

 6  1420.65 1420.65   158170      0        0   0.080       0   0.00  0.29
 7  1420.65 1420.50   156798      0        0   0.330       0   0.00  0.00
 8  1420.50 1420.50   156798      0        0   0.250       0   0.29  0.13
 9  1420.50 1420.49   156706      0        0   0.310     100   0.00  0.00
10  1420.49 1420.50   156798      0        0   0.410     100   0.44  0.06

11  1420.50 1420.50   156798      0        0   0.210     100   0.26  0.25
12  1420.50 1420.52   156981      0        0   0.150      50   0.12  0.30
13  1420.53 1420.42   156066      0      244   0.170      30   0.00  0.02
14  1420.38 1420.25   154510      0      680   0.210      20   0.00  0.00
15  1420.22 1420.06   152772      0      960   0.110     150   0.21  0.37

16  1420.00 1419.86   150989      0      958   0.090     140   0.20  0.08
17  1419.79 1419.63   148965      0      956   0.120      50   0.01  0.00
18  1419.55 1419.47   147556      0      954   0.090     250   0.00  0.01
19  1419.39 1419.27   145796      0      952   0.060     200   0.27  0.15
20  1419.33 1419.07   144035      0      951   0.340     150   0.48  0.21

21  1419.02 1418.88   142404      0      948   0.160     200   0.11  0.15
22  1418.80 1418.66   140543      0      946   0.160     200   0.00  0.00
23  1418.61 1418.54   139528      0      944   0.230     200   0.00  0.00
24  1418.47 1418.21   136736      0      942   0.230      50   0.00  0.00
25  1418.13 1418.00   134960      0      940   0.240      50   0.00  0.00

26  1417.92 1417.98   134797      0      938   0.240     950   0.00  0.00
27  1418.07 1418.08   135636      0       39   0.240     400   2.87  0.51
28  1418.10 1418.17   136398      0        0   0.010     200   0.33  0.15
29  1418.13 1418.00   134960      0      368   0.090     100   0.15  0.06
30  1417.96 1417.83   133580      0      707   0.150     100   0.00  0.00

TOTAL                             0    13425   6.970    3790   6.43  3.00
AVERAGE  1419.58                  0      448             126 NORMAL= 2.83

MAXIMUM  1420.79      159452   DATE= 1    TOP CONSERVATION POOL   1421.60
MINIMUM  1417.83      133580   DATE=30    TOP FLOOD POOL          1429.00

                      INFLOW VOLUME=     7517 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION