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                                   Cheney Lake
                          MONTHLY LAKE REPORT
                                 APR 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 1423.20   182778
 1  1423.21 1423.11   181858      0     1239   0.050     850   0.01  0.00
 2  1423.07 1422.97   180438      0     1238   0.180     600   0.00  0.00
 3  1422.96 1422.78   178565      0     1236   0.240     550   0.02  0.03
 4  1422.75 1422.64   177185      0     1234   0.090     400   0.00  0.01
 5  1422.56 1422.45   175311      0     1232   0.090     300   0.00  0.00

 6  1422.40 1422.29   173735      0     1230   0.020     550   0.00  0.00
 7  1422.28 1422.15   172354      0     1228   0.250     600   0.35  0.51
 8  1422.10 1421.98   170685      0     1226   0.160     450   0.01  0.00
 9  1421.95 1421.84   169354      0      972   0.100     375   0.00  0.00
10  1421.84 1421.81   169070      0      479   0.160     350   0.00  0.00

11  1421.80 1421.76   168595      0      244   0.260     350   0.00  0.00
12  1421.73 1421.76   168595      0      244   0.400     325   0.00  0.00
13  1421.79 1421.78   168785      0      158   0.350     325   0.00  0.00
14  1421.78 1421.81   169070      0        0   0.300     300   0.00  0.00
15  1421.87 1421.83   169259      0      132   0.280     300   0.00  0.00

16  1421.81 1421.76   168595      0      244   0.190     200   0.00  0.00
17  1421.76 1421.74   168404      0      244   0.270     175   0.00  0.00
18  1421.72 1421.70   168024      0      244   0.110     150   0.00  0.00
19  1421.68 1421.65   167550      0      244   0.190     150   0.00  0.00
20  1421.66 1421.63   167359      0      244   0.180     150   0.00  0.00

21  1421.63 1421.59   166979      0       86   0.290     150   0.00  0.00
22  1421.61 1421.61   167169      0        0   0.230     150   0.00  0.00
23  1421.61 1421.61   167169      0        0   0.250     150   0.00  0.00
24  1421.61 1421.58   166884      0        0   0.210     150   0.00  0.00
25  1421.59 1421.64   167454      0        0   0.410     150   0.00  0.00

26  1421.62 1421.64   167454      0        0   0.390     100   0.00  0.00
27  1421.66 1421.75   168500      0        0   0.100     575   0.00  0.00
28  1421.75 1421.80   168975      0        0   0.020     400   0.95  0.51
29  1421.80 1421.85   169449      0        0   0.000     300   0.41  0.30
30  1421.88 1421.88   169735      0      158   0.050     300   0.01  0.01

TOTAL                             0    13557   5.820    9875   1.76  1.37
AVERAGE  1421.95                  0      452             329 NORMAL= 2.32

MAXIMUM  1423.21      182881   DATE= 1    TOP CONSERVATION POOL   1421.60
MINIMUM  1421.56      166695   DATE=24    TOP FLOOD POOL          1429.00

                      INFLOW VOLUME=    19587 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION